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rugged environment dc-dc converters >100 watt k series edition 4/4.99 1/31 melcher the power partners. 150 watt dc-dc converters k series input to output isolation single output: ak...ek 1000 double output: ak...ek 2000 extremely wide input voltage range input over- and undervoltage lock-out efficient input filter and built-in surge and transient suppression circuitry 4 kv rms input to output electric strength test fully isolated outputs outputs open- and short-circuit proof no derating over entire operating temperature range table of contents page summary .......................................................................... 1 type survey and key data .............................................. 2 type key .......................................................................... 3 functional description ...................................................... 4 electrical input data ......................................................... 5 electrical output data ...................................................... 7 auxiliary functions ......................................................... 14 summary the k series of dc-dc converters represents a broad and flexible range of power supplies for use in advanced elec- tronic systems. features include high efficiency, high reli- ability, low output voltage noise and excellent dynamic re- sponse to load/line changes. the converter inputs are protected against surges and tran- sients occuring at the source lines. an input over- and undervoltage lock-out circuitry disables the outputs if the input voltage is outside the specified range. certain types include an inrush current limitation preventing circuit break- ers and fuses from being damaged at switch-on. all outputs are open- and short-circuit proof and are pro- tected against overvoltages by means of a built-in suppres- sor diode. the outputs can be inhibited by a logic signal ap- plied to the connector pin 18 (i). if the inhibit function is not used pin 18 must be connected with pin 14 to enable the outputs. led indicators display the status of the converter and allow visual monitoring of the system at any time. full input to output, input to case, output to case and output to output isolation is provided. the modules are designed and built according to the international safety standards iec/en 60950 and have been approved by the safety agencies lga (germany) and ul (usa). the ul mark for canada has been officially recognized by regulatory au- thorities in provinces across canada. the case design allows operation at nominal load up to 71 c in a free air ambient temperature. if forced cooling is provided, the ambient temperature may exceed 71 c but the case temperature must remain below 95 c under all conditions. a temperature sensor generates an inhibit signal which disables the outputs if the case temperature t c exceeds the limit. the outputs are automatically re-enabled when the temperature drops below the limit. various options are available to adapt the converters to in- dividual applications. the modules may either be plugged into 19" rack systems according to din 41494, or be chassis mounted. 168 6.6" 80 3.2" 16 te 111 4.4" 3 u safety according to iec/en 60950 lga c page electromagnetic compatibility (emc) ............................ 18 immunity to environmental conditions ........................... 20 mechanical data ............................................................ 21 safety and installation instructions ................................ 22 description of options .................................................... 25 accessories .................................................................... 31
k series dc-dc converters >100 watt rugged environment edition 4/4.99 2/31 melcher the power partners. type survey and key data non standard input configurations or special custom adaptions are available on request. see also: commercial informa- tion: inquiry form for customized power supply. table 1a: type survey ak output 1 output 2 input voltage options u o nom i o nom u o nom i o nom u i min ... u i max h min [v dc] [a] 2 [v dc] [a] 2 8...35 v dc [%] 5.1 20.0 - - ak 1001-7r 78 -9 12.0 10.0 - - ak 1301-7r 80 e 3 15.0 8.0 - - ak 1501-7r 80 d 24.0 5.0 - - ak 1601-7r 82 v 6 24.0 4 5.0 - - ak 2320-7r 78 p 30.0 4 4.0 - - ak 2540-7r 79 t 48.0 4 2.5 - - ak 2660-7r 79 b1 12.0 5.0 12.0 5 5.0 ak 2320-7r 78 b2 15.0 4.0 15.0 5 4.0 ak 2540-7r 79 24.0 2.5 24.0 5 2.5 ak 2660-7r 79 table 1c: type survey dk, ek output 1 output 2 input voltage range and efficiency 1 options u o nom i o nom u o nom i o nom u i min ... u i max h min u i min ... u i max h min [v dc] [a] 2 [v dc] [a] 2 44...220 v dc [%] 67...385 v dc [%] 5.1 25.0 - - dk 1001-7r 79 - - -9 12.0 12.0 - - dk 1301-7r 83 ek 1301-7r 84 e 3 15.0 10.0 - - dk 1501-7r 86 ek 1501-7r 84 d 24.0 6.0 - - dk 1601-7r 87 ek 1601-7r 84 v 6 24.0 4 6.0 - - dk 2320-7r 81 ek 2320-7r 81 p 30.0 4 5.0 - - dk 2540-7r 82 ek 2540-7r 80 t 48.0 4 3.0 - - dk 2660-7r 85 ek 2660-7r 83 b1 12.0 6.0 12.0 5 6.0 dk 2320-7r 81 ek 2320-7r 81 b2 15.0 5.0 15.0 5 5.0 dk 2540-7r 82 ek 2540-7r 80 24.0 3.0 24.0 5 3.0 dk 2660-7r 85 ek 2660-7r 83 1 efficiency at u i nom and i o nom . 2 if the output voltages are increased above u o nom via r-input control, option p setting, remote sensing or option t, the output currents should be reduced accordingly so that p o nom is not exceeded. 3 option e only for ck, dk, ek types. 4 series connection of output 1 and 2. 5 second output semi-regulated. 6 option v for k 1001 types only. table 1b: type survey bk, fk, ck output 1 output 2 input voltage range and efficiency 1 options u o nom i o nom u o nom i o nom u i min ... u i max h min u i min ... u i max h min u i min ... u i max h min [v dc] [a] 2 [v dc] [a] 2 14...70 v dc [%] 20...100 v dc [%] 28...140 v dc [%] 5.1 25.0 - - bk 1001-7r 79 fk 1001-7r 80 ck 1001-7r 79 -9 12.0 12.0 - - bk 1301-7r 81 fk 1301-7r 82 ck 1301-7r 82 e 3 15.0 10.0 - - bk 1501-7r 82 fk 1501-7r 85 ck 1501-7r 84 d 24.0 6.0 - - bk 1601-7r 84 fk 1601-7r 86 ck 1601-7r 86 v 6 24.0 4 6.0 - - bk 2320-7r 80 fk 2320-7r 81 ck 2320-7r 80 p 30.0 4 5.0 - - bk 2540-7r 80 fk 2540-7r 83 ck 2540-7r 82 t 48.0 4 3.0 - - bk 2660-7r 80 fk 2660-7r 84 ck 2660-7r 84 b1 12.0 6.0 12.0 5 6.0 bk 2320-7r 80 fk 2320-7r 81 ck 2320-7r 80 b2 15.0 5.0 15.0 5 5.0 bk 2540-7r 80 fk 2540-7r 83 ck 2540-7r 82 24.0 3.0 24.0 5 3.0 bk 2660-7r 80 fk 2660-7r 84 ck 2660-7r 84
rugged environment dc-dc converters >100 watt k series edition 4/4.99 3/31 melcher the power partners. type key type key c k 2 5 40 -7 e r p d v t b1 input voltage range u i : 8...35 v dc ............... a 14...70 v dc .............. b 20...100 v dc .............. f 28...140 v dc .............. c 44...220 v dc .............. d 67...385 v dc .............. e series ............................................................................... k number of outputs ....................................................... 1...2 single output units: nominal voltage output 1 (main output) , u o1 nom 5.1 v ....... 0, 1, 2 12 v ............... 3 15 v ........... 4, 5 24 v ............... 6 other voltages ........... 7, 8 other specifications for single output modules ...... 01...99 symmetrical double output units: nominal voltage output 1/output 2, u o1/2 nom 12 v/12 v 1 (24 v series connection) ............. 20 15 v/15 v 1 (30 v series connection) ............. 40 24 v/24 v 1 (48 v series connection) ............. 60 other symmetrical voltages ...... 70...99 operational ambient temperature range t a : C2571 c .............. -7 C4071 c .............. -9 customer specific ........ -0...-6 auxiliary functions and options: inrush current limitation .................................................... e 3 output voltage control input ............................................ r 2 potentiometer (output voltage adjustment) ...................... p 2 save data signal (d0...dd, to be specified) .................... d 4 acfail signal (v0, v2, v3, to be specified) .................... v 4, 5 current sharing ................................................................ t cooling plate standard case .......................................... b1 cooling plate for long case 220 mm .............................. b2 1 external wiring of main and second output depending upon the desired output configuration (see: r-function for different output configurations ). 2 feature r excludes option p and vice versa. 3 option e available for ck, dk and ek types. 4 option d excludes option v and vice versa. 5 option v available for k 1001 type. example: ck 2540-7pd3: dc-dc converter, input voltage range 28...140 v, double output, each providing 15 v/ 5 a, equipped with potentiometer and undervoltage monitoring option. ambient temperature C25...71 c.
k series dc-dc converters >100 watt rugged environment edition 4/4.99 4/31 melcher the power partners. fig. 1 block diagram of single output converters akek 1000 input filter control circuit 2 p 3 forward converter (approx. 120 khz) y 16 18 20 22 12 4 6 8 10 14 y output filter 1 26 28 30 32 24 4 C + y y vi+ vi C r i d/v t 03057 s+ vo+ vo C s C functional description the input voltage is fed via an input fuse, an input filter, and an inrush current limiter to the input capacitor. this capaci- tor sources a single transistor forward converter. each out- put is powered by a separate secondary winding of the main transformer. the resultant voltages are rectified and their ripples smoothed by a power choke and output filter. the control logic senses the main output voltage u o1 and generates, with respect to the maximum admissible output currents, the control signal for the primary switching tran- sistor. the second output of double output units is controlled by the main output but has independent current limiting. if the main output is driven into current limitation, the second out- put voltage will fall as well and vice versa. fig. 2 block diagram of symmetrical double output converters ak...ek 2000 1 transient suppressor (vdr) in ck, dk, ek, fk types 2 transient suppressor (diode) in ak, bk, ck, fk types 3 inrush current limiter in ck, dk, ek types (ntc or opt. e), -9 versions exclude the ntc 4 input fuse input filter control circuit 1 2 p 3 forward converter (approx. 110 khz) 16 18 20 22 12 14 4 6 8 10 output 2 filter output 1 filter 26 28 30 32 24 4 C + y y y y y y r i d t vi+ vi C 03058 vo1+ vo1 C vo2+ vo2 C
rugged environment dc-dc converters >100 watt k series edition 4/4.99 5/31 melcher the power partners. electrical input data general conditions C t a = 25 c, unless t c is specified. C pin 18 connected to pin 14, u o adjusted to u o nom (option p); r input not connected. C sense line pins s+ and s C connected to vo+ and vo C respectively. table 2a: input data input ak bk fk characteristics conditions min typ max min typ max min typ max unit u i operating input voltage i o = 0 i o nom 8 35 14 70 20 100 v dc u i nom nominal input voltage t c min t c max 15 30 48 i i input current u i nom , i o nom 1 9.0 6.0 3.75 a p i0 no-load input power u i min u i max 2.5 2.5 2.5 w p i inh idle input power unit inhibited 1.5 1.5 1.5 r i input resistance t c = 25 c 65 100 70 m ? r ntc ntc resistance 2 333 c i input capacitance 830 1250 300 450 1200 1800 f u i rfi conducted input rfi en 55022 a b b radiated input rfi u i nom , i o nom aab u i abs input voltage limits 0 40 0 80 0 100 v dc without damage table 2b: input data input ck dk ek characteristics conditions min typ max min typ max min typ max u i operating input voltage i o = 0 i o nom 28 140 44 220 67 385 v dc u i nom nominal input voltage t c min t c max 60 110 220 i i input current u i nom , i o nom 1 3.0 1.6 0.8 a p i0 no-load input power u i min u i max 2.5 2.5 2.5 w p i inh idle input power unit inhibited 1.5 1.5 1.5 r i input resistance t c = 25 c 150 170 180 m ? r ntc ntc resistance 2 800 1600 3200 c i input capacitance 660 1000 260 400 210 400 f u i rfi conducted input rfi en 55022 b b b radiated input rfi u i nom , i o nom bbb u i abs input voltage limits 0 154 0 400 4 0 400 v dc without damage 1 with double output modules, both outputs loaded with i o nom . 2 valid for -7 versions with ntc, (-9 versions exclude the ntc). initial switch-on cycle. subsequent switch-on/off cycles increas e the in- rush current peak value. 3 ak, bk and fk types have no ntc (inrush current limiter) fitted. 4 1 s max., duty cycle 1% max. input transient protection a suppressor diode or a vdr (depending upon the input voltage range) together with the input fuse and a symmetri- cal input filter form an effective protection against high input transient voltages which typically occur in most installa- tions, but especially in battery driven mobile applications. nominal battery voltages in use are: 12, 24, 36, 48, 60, 72, 110 and 220 v. in most cases each nominal value is speci- fied in a tolerance of C 30%...+25%. in certain applications, surges according to ria 12 are specified in addition to those defined in iec 571-1. the power supply must not switch off during these surges and since their energy can practically not be absorbed an ex- tremely wide input range is required. the ek input range for 110 v batteries has been designed and tested to meet this requirement. inrush current limitation the ck, dk, ek modules incorporate an ntc resistor in the input circuitry which - at initial turn on - reduces the peak inrush current value by a factor of 5...10 to protect connec- tors and switching devices from damage. subsequent switch-on cycles within short periods will cause an increase of the peak inrush current value due to the warming-up of the ntc resistor. see also: e option .
k series dc-dc converters >100 watt rugged environment edition 4/4.99 6/31 melcher the power partners. input fuse a fuse mounted inside the converter protects the module against severe defects. this fuse may not fully protect the module when the input voltage exceeds 200 v dc! in appli- cations where the converters operate at source voltages above 200 v dc an external fuse or a circuit breaker at sys- tem level should be installed! table 3: fuse specification module fuse type fuse rating ak 1 fast-blow little fuse 314 30.0 a, 125 v bk 1 fast-blow little fuse 314 25.0 a, 125 v ck 2 slow-blow spt 12.5 a, 250 v dk 2 slow-blow spt 8 a, 250 v ek 2 slow-blow spt 4 a, 250 v fk 2 slow-blow spt 16 a, 250 v 1 fuse size 6.3 32 mm 2 fuse size 5 20 mm input under-/overvoltage lock-out if the input voltage remains below approx. 0.8 u i min or ex- ceeds approx. 1.1 u i max , an internally generated inhibit sig- nal disables the output(s). when checking this function the absolute maximum input voltage rating u i abs should be considered! between u i min and the undervoltage lock-out level the output voltage may be below the value defined in table: output data (see: technical information: measuring and testing ). hold-up time versus relative input voltage inrush current peak value the inrush current peak value (initial switch-on cycle) can be determined by following calculation: (see also: input in- rush current characteristic ) u i source i inr p = CCCCCCCCCCCCCCCC ( r s ext + r i + r ntc ) r s ext r i r ntc i inr p u i source + c i int 05109 fig. 4 equivalent circuit for input impedance reverse polarity the units are not protected against reverse polarity at the input to avoid unwanted power losses and may be dam- aged. input inrush current characteristic 1 23 t [ms] 0 50 100 i i inr [a] 150 ck ek dk 05108 fig. 5 typical inrush current versus time at u i max , r ext = 0. for ak, bk and fk as well as for application related val- ues use the formula given in inrush current peak value to get realistic results. 23456 1 0.10 1.00 u i ____ u i min t h (ms) 10.00 100.00 dk ck/fk ek ak bk 04045 fig. 6 typical hold-up time t h versus relative input voltage u i /u imin . the dc-dc converters require an external series diode in the input path if other loads are connected to the same input supply lines. static input current characteristic fig. 3 typical input current versus relative input voltage 2345 1 0.40 1.00 10.00 u i ____ u i min i i (a) 20.00 04044 fk ck ek dk bk ak
rugged environment dc-dc converters >100 watt k series edition 4/4.99 7/31 melcher the power partners. electrical output data general conditions C t a = 25 c, unless t c is specified. C pin 18 (i) connected to pin 14 (s C /vo1 C ), u o adjusted to u o nom (option p), r input not connected. C sense line pins 12 (s+) and 14 (s C ) connected to vo1+ and vo1 C respectively. table 4a: output data single output modules ak/bk output ak/bk 1001 ak/bk 1301 ak/bk 1501 ak/bk 1601 5.1 v 12.0 v 15.0 v 24.0 v characteristics conditions min typ max min typ max min typ max min typ max unit u o output voltage u i nom , i o nom 5.07 5.13 11.93 12.07 14.91 15.09 23.86 24.14 v u o p overvoltage protection 7.6 21 26.5 43.5 (suppressor diode) i o nom output current 1 u i min u i max 20.0/25.0 10.0/12.0 8.0/10.0 5.0/6.0 a t c min t c max i o l output current limit 4 u i min u i max 21/26 10.2/12.2 8.2/10.2 5.2/6.2 u o 7 output switching freq. u i nom , i o nom 10555mv pp voltage total iec/en 61204 60 40 30 50 noise bw = 20 mhz d u o u static line regulation u i min ... u i nom 15 25 30 30 mv u i nom ... u i max i o nom d u o i static load regulation u i nom , i o = 20253040 (0.1 1) i o nom u o d 5 dynamic voltage u i nom , i o = 220 110 150 130 load deviation i o nom ? 1 / 2 i o nom t d 5 regulation recovery iec/en 61204 0.6 0.6 0.5 1 ms time a uo temperature coefficient t c min t c max C 0.2 C 1 C 1 C 1 mv/k of output voltage 6 0... i o nom 1 if the output voltages are increased above u o nom through r-input control, option p setting, remote sensing or option t, the output cur- rent should be reduced accordingly so that p o nom is not exceeded. 4 see: output voltage regulation of single output units . 5 see: dynamic load regulation of u o1 . 6 negative temperature coefficient (0... C 3 mv/cell and k) available on request 7 measured according to iec/en 61204 sub clause 3.10 with a probe acc. to annex a of the same standards. (see: technical informa- tion: measuring and testing )
k series dc-dc converters >100 watt rugged environment edition 4/4.99 8/31 melcher the power partners. table 4b: output data double output modules ak/bk output ak/bk 2320 ak/bk 2540 ak/bk 2660 (outputs connected in series) 24 v (2 12 v) 30 v (2 15 v) 48 v (2 24 v) characteristics conditions min typ max min typ max min typ max unit u o output voltage u i nom , i o nom 24.0 2 30.0 2 48.0 2 v u o p overvoltage protection 38 48 74 (suppressor diode) i o nom output current 1 u i min u i max 5.0/6.0 4.0/5.0 2.5/3.0 a t c min t c max i o l output current limit 4 u i min u i max 5.2/6.2 4.2/5.2 2.7/3.2 u o 7 output switching freq. u i nom , i o nom 10 5 5 mv pp voltage total iec/en 61204 60 60 70 noise 3 bw = 20 mhz d u o u static line regulation u i min ... u i nom 15 15 20 mv u i nom ... u i max i o nom d u o i static load regulation u i nom , i o =25 25 35 (0.1 1) i o nom u o d 5 dynamic voltage u i nom , i o = 180 160 100 load deviation i o nom ? 1 / 2 i o nom t d 5 regulation recovery iec/en 61204 0.3 0.2 0.2 ms time a uo temperature coefficient t c min t c max C 2 C 2 C 2 mv/k of output voltage 6 0... i o nom 1 if the output voltages are increased above u o nom through r-input control, option p setting, remote sensing or option t, the output cur- rent should be reduced accordingly so that p o nom is not exceeded. 2 series connection for u o nom = 24 v, 30 v or 48 v, see: r-function for different output configurations . 3 shortest possible wiring for series connection at the connector. 4 see: output voltage regulation of single output units . 5 see: dynamic load regulation of u o1 and u o2 . 6 negative temperature coefficient (0... C 3 mv/cell and k) available on request. 7 measured according to iec/en 61204 sub clause 3.10 with a probe acc. to annex a of the same standards. (see: technical informa- tion: measuring and testing. )
rugged environment dc-dc converters >100 watt k series edition 4/4.99 9/31 melcher the power partners. table 4d: output data double output modules ak/bk output ak/bk 2660 (outputs independently loaded) 1 24 v/24 v characteristics conditions output 1 output 2 min typ max min typ max unit u o output voltage u i nom , i o nom 2 23.86 24.14 23.64 24.36 v u o p overvoltage protection 37 37 (suppressor diode) i o nom output current 3 u i min u i max 2.5/3.0 2.5/3.0 a t c min t c max i o l output current limit 4 u i min u i max 2.7/3.2 2.7/3.2 u o 9 output switching freq. u i nom , i o nom 55mv pp voltage total iec/en 61204 60 30 noise bw = 20 mhz d u o u static line regulation u i min ... u i nom 40 40 mv u i nom ... u i max i o nom d u o i static load regulation u i nom , i o =70 8 (0.1 1) i o nom 5 u o d 6 dynamic voltage u i nom , i o = 50 load deviation i o nom ? 1 / 2 i o nom t d 6 regulation recovery iec/en 61204 0.2 ms time a uo temperature coefficient t c min t c max C 1 mv/k of output voltage 7 0... i o nom table 4c: output data double output modules ak/bk output ak/bk 2320 ak/bk 2540 (outputs independently loaded) 1 12 v/12 v 15 v/15 v characteristics conditions output 1 output 2 output 1 output 2 min typ max min typ max min typ max min typ max unit u o output voltage u i nom , i o nom 2 11.93 12.07 11.82 12.18 14.91 15.09 14.78 15.23 v u o p overvoltage protection 19 19 24 24 (suppressor diode) i o nom output current 3 u i min ... u i max 5.0/6.0 5.0/6.0 4.0/5.0 4.0/5.0 a t c min ... t c max i o l output current limit 4 u i min ... u i max 5.2/6.2 5.2/6.2 4.2/5.2 4.2/5.2 u o 9 output switching freq. u i nom , i o nom 10 10 10 10 mv pp voltage total iec/en 61204 50 20 50 20 noise bw = 20 mhz d u o u static line regulation u i min ... u i nom 30 30 30 30 mv u i nom ... u i max i o nom d u o i static load regulation u i nom , i o =50 8 50 8 (0.1...1) i o nom 5 u o d 6 dynamic voltage u i nom , i o = 80 80 load deviation i o nom ? 1 / 2 i o nom t d 6 regulation recovery iec/en 61204 0.2 0.2 ms time a uo temperature coefficient t c min ... t c max C 1 C 1 mv/k of output voltage 7 0... i o nom 1 depending upon the desired out- put configuration the wiring should be made as shown in: r-function for different output configurations. 2 same conditions for both outputs. 3 if the output voltages are in- creased above u o nom via r-input control, option p setting, remote sensing or option t, the output cur- rents should be reduced accord- ingly so that p o nom is not ex- ceeded. 4 see: output voltage regulation of single output units . 5 condition for specified output. other output loaded with constant current i o = i o nom 6 see: dynamic load regulation of u o1 and u o2 . 7 negative temperature coefficient (0 C 3 mv/cell and k) available on request. 8 see: output voltage regulation of double output modules . 9 measured according to iec/en 61204 sub clause 3.10 with a probe acc. to annex a of the same standards. (see: technical infor- mation: measuring and testing )
k series dc-dc converters >100 watt rugged environment edition 4/4.99 10/31 melcher the power partners. table 4f: output data double output modules ck...ek output ck...ek 2320 ck...ek 2540 ck...ek 2660 (outputs connected in series) 24 v (2 12 v) 30 v (2 15 v) 48 v (2 24 v) characteristics conditions min typ max min typ max min typ max unit u o output voltage u i nom , i o nom 24.0 2 30.0 2 48.0 2 v u o p overvoltage protection 38 48 74 (suppressor diode) i o nom output current 1 u i min ... u i max 6.0 5.0 3.0 a t c min ... t c max i o l output current limit 4 u i min ... u i max 6.2 5.2 3.2 u o 7 output switching freq. u i nom , i o nom 15 15 20 mv pp voltage total iec/en 61204 100 120 120 noise 3 bw = 20 mhz d u o u static line regulation u i min ... u i nom 40 30 50 mv u i nom ... u i max i o nom d u o i static load regulation u i nom , i o =40 30 40 (0.1...1) i o nom u o d 5 dynamic voltage u i nom , i o = 100 100 100 load deviation i o nom ? 1 / 2 i o nom t d 5 regulation recovery iec/en 61204 0.3 0.5 0.4 ms time a uo temperature coefficient t c min ... t c max C 2.2 C 2.2 C 2.6 mv/k of output voltage 6 0... i o nom 1 if the output voltages are increased above u o nom through r-input control, option p setting, remote sensing or option t, the output cur- rent should be reduced accordingly so that p o nom is not exceeded. 2 series connection for u o nom = 24 v, 30 v or 48 v, see: r-function for different output configurations . 3 shortest possible wiring for series connection at the connector. 4 see: output voltage regulation of single output units . 5 see: dynamic load regulation of u o1 and u o2 . 6 negative temperature coefficient (0... C 3 mv/cell and k) available on request 7 measured according to iec/en 61204 sub clause 3.10 with a probe acc. to annex a of the same standards. (see technical informa- tion: measuring and testing. ) table 4e: output data single output modules ck...ek output ck...dk 1001 ck...ek 1301 ck...ek 1501 ck...ek 1601 5.1 v 12.0 v 15.0 v 24.0 v characteristics conditions min typ max min typ max min typ max min typ max unit u o output voltage u i nom , i o nom 5.07 5.13 11.93 12.07 14.91 15.09 23.86 24.14 v u o p overvoltage protection 7.6 21 26.5 43.5 (suppressor diode) i o nom output current 1 u i min ... u i max 25.0 12.0 10.0 6.0 a t c min ... t c max i o l output current limit 4 u i min ... u i max 26 12.2 10.2 6.2 u o 7 output switching freq. u i nom , i o nom 10555mv pp voltage total iec/en 61204 50 40 30 50 noise bw = 20 mhz d u o u static line regulation u i min ... u i nom 15 25 30 30 mv u i nom ... u i max i o nom d u o i static load regulation u i nom , i o = 202530 40 (0.1...1) i o nom u o d 5 dynamic voltage u i nom , i o = 100 100 100 80 load deviation i o nom ? 1 / 2 i o nom t d 5 regulation recovery iec/en 61204 0.3 0.5 0.4 0.3 ms time a uo temperature coefficient t c min ... t c max C 1 C 1 C 1 C 2 mv/k of output voltage 6 0... i o nom
rugged environment dc-dc converters >100 watt k series edition 4/4.99 11/31 melcher the power partners. table 4h: output data double output modules ck...ek output ck...ek 2660 (outputs independently loaded) 1 24 v/24 v characteristics conditions output 1 output 2 min typ max min typ max unit u o output voltage u i nom , i o nom 2 23.86 24.14 23.64 24.36 v u o p overvoltage protection 37 37 (suppressor diode) i o nom output current 3 u i min ... u i max 3.0 3.0 a t c min ... t c max i o l output current limit 4 u i min ... u i max 3.2 3.2 u o 9 output switching freq. u i nom , i o nom 55mv pp voltage total iec/en 61204 100 25 noise bw = 20 mhz d u o u static line regulation u i min ... u i nom , 30 50 mv u i nom ... u i max , i o nom d u o i static load regulation u i nom , i o =50 8 (0.1...1) i o nom 5 u o d 6 dynamic voltage u i nom , i o = 50 load deviation i o nom ? 1 / 2 i o nom t d 6 regulation recovery iec/en 61204 0.2 ms time a uo temperature coefficient t c min ... t c max C 1.3 mv/k of output voltage 7 0... i o nom table 4g: output data double output modules ck...ek output ck...ek 2320 ck...ek 2540 (outputs independendtly loaded) 1 12 v/12 v 15 v/15 v characteristics conditions output 1 output 2 output 1 output 2 min typ max min typ max min typ max min typ max unit u o output voltage u i nom , i o nom 2 11.93 12.07 11.82 12.18 14.91 15.09 14.78 15.22 v u o p overvoltage protection failure in 19 19 24 24 (suppressor diode) control circuit i o nom output current 3 u i min ... u i max 6.0 6.0 5.0 5.0 a t c min ... t c max i o l output current limit 4 u i min ... u i max 6.2 6.2 5.2 5.2 u o 9 output switching freq. u i nom , i o nom 5555mv pp voltage total iec/en 61204 75 25 100 25 noise bw = 20 mhz d u o u static line regulation u i min ... u i nom 30 40 30 40 mv u i nom ... u i max i o nom d u o i static load regulation u i nom , i o = 100 8 100 8 (0.1...1) i o nom 5 u o d 6 dynamic voltage u i nom , i o = 100 80 load deviation i o nom ? 1 / 2 i o nom t d 6 regulation recovery iec/en 61204 0.3 0.2 ms time a uo temperature coefficient t c min ... t c max C 1.1 C 1.1 mv/k of output voltage 7 0... i o nom 1 depending upon the desired out- put configuration the wiring should be made as shown in: r-function for different output configurations . 2 same conditions for both outputs. 3 if the output voltages are in- creased above u o nom via r-input control, option p setting, remote sensing or option t, the output cur- rents should be reduced accord- ingly so that p o nom is not ex- ceeded. 4 see: output voltage regulation of single output units . 5 condition for specified output. other output loaded with constant current i o = i o nom . 6 see: dynamic load regulation of u o1 and u o2 . . 7 negative temperature coefficient (0... C 3 mv/cell and k) available on request. 8 see: output voltage regulation of double output modules . 9 measured according to iec/en 61204 sub clause 3.10 with a probe acc. to annex a of the same standards. (se:e technical infor- mation: measuring and testing. )
k series dc-dc converters >100 watt rugged environment edition 4/4.99 12/31 melcher the power partners. output protection each output is protected against overvoltages which could occur due to a failure of the internal control circuit. voltage suppressor diodes (which under worst case condition may become a short circuit) provide the required protection. the suppressor diodes are not designed to withstand externally applied overvoltages. overload at any of the outputs will cause a shut-down of all outputs. a red led indicates the overload condition. parallel or series connection of units single or double output units with equal nominal output voltage can be connected in parallel without any precau- tions using option t. with option t (current sharing), all units share the current approximately equally. single output units and/or main and second outputs of dou- ble output units can be connected in series with any other (similar) output. note: C parallel connection of double output units should always include both, main and second output to maintain good regulation of both outputs. C not more than 5 units should be connected in parallel. C series connection of second outputs without involving their main outputs should be avoided as regulation may be poor. C the maximum output current is limited by the output with the lowest current limitation if several outputs are con- nected in series. thermal considerations if a converter is located in free, quasi-stationary air (con- vection cooling) at the indicated maximum ambient tem- perature t a max (see table: temperature specifications) and is operated at its nominal input voltage and output power, the temperature measured at the measuring point of case temperature t c (see: mechanical data ) will approach the indicated value t c max after the warm-up phase. however, the relationship between t a and t c depends heavily on the conditions of operation and integration into a system. the thermal conditions are influenced by input voltage, output current, airflow and temperature of surrounding compo- nents and surfaces. t a max is therefore, contrary to t c max , an indicative value only. caution: the installer must ensure that under all operat- ing conditions t c remains within the limits stated in the table temperature specifications. notes: sufficient forced cooling or an additional heat sink allows t a to be higher than 71 c (e.g. 85 c) if t c max is not exceeded. for -7 or -9 units at an ambient temperature t a of 85 c with only convection cooling, the maximum permissible current for each output is approx. 40% of its nominal value as per figure. 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 50 60 70 80 90 100 i o / i o nom t a [ c] 0.9 1.0 forced cooling 05089 t a min t c max convection cooling fig. 7 output current derating versus temperature for -7 and -9 units. thermal protection a temperature sensor generates an internal inhibit signal which disables the outputs if the case temperature exceeds t c max . the outputs are automatically re-enabled if the tem- perature drops below this limit. it is recommended that continuous operation under simul- taneous extreme worst case conditions of the following three parameters be avoided: minimum input voltage, maximum output power and maximum temperature. u o1d u o1d t d t d u r u r t t t u o2d <10 s <10 s u o1 u o2 i o1 / i o1 nom 0 0.5 1 i o2 / i o2 nom 05072 fig. 8 typical dynamic load regulation of u o1 and u o2
rugged environment dc-dc converters >100 watt k series edition 4/4.99 13/31 melcher the power partners. output voltage regulation of double output modules output 1 is under normal conditions regulated to u o1 nom , independent of the output currents. u o2 is dependent upon the load distribution. if both outputs are loaded with more than 10% of i o nom , the deviation of u o2 remains within 5% of the value of u o1 . the following 3 figures show the regulation with varying load distribution. if i o1 = i o2 or the two outputs are connected in series, the de- viation of u o2 remains within 1% of the value of u o1 pro- vided that a total load of more than 10% of i o nom is applied. two outputs of a single k 2000 module connected in paral- lel will behave like the output of a k 1000 module; the paral- leled output is fully regulated. no precautions are neces- sary in using the r-input and the test sockets. fig. 10 ak...ek 2320: d u o2 (typ.) vs. i o2 with different i 01 0123456 i o nom 78 i o2 [a] 11.2 11.4 11.6 11.8 12.0 12.2 12.4 12.6 [v] u o2 i o1 = 6.0 a i o1 = 4.5 a i o1 = 3.0 a i o1 = 1.5 a i o1 = 0.6 a 05105 0123456 i o nom 7 i o2 [a] 14.00 14.25 14.50 14.75 15.00 15.25 15.50 15.75 [v] u o2 i o1 = 5.00 a i o1 = 3.75 a i o1 = 2.50 a i o1 = 1.25 a i o1 = 0.50 a 05106 fig. 11 ak...ek 2540: d u o2 (typ.) vs. i o2 with different i 01 [v] u o2 i o2 [a] 0 0.5 1 1.5 2 2.5 3 i o nom 3.5 4 23.0 23.5 24.0 24.5 25.0 25.5 26.0 i o1 = 3.0 a i o1 = 2.0 a i o1 = 1.0 a i o1 = 0.5 a i o1 = 0.3 a 05107 fig. 12 ak...ek 2660: d u o2 (typ.) vs. i o2 with different i 01 output voltage regulation of single or double output modules with outputs 1 and 2 connected in series fig. 9 u o1 vs. i o1 (typ.) of single output units ak...ek u o u o nom 0.98 0.5 0 0.5 1.0 i o1 i ol i o i o nom 05098
k series dc-dc converters >100 watt rugged environment edition 4/4.99 14/31 melcher the power partners. fig. 15 typical output response as a function of inhibit control table 5: inhibit characteristics characteristic conditions min typ max unit u inh inhibit u o = on u i min u i max C 50 0.8 v voltage u o = off 2.4 50 i inh inhibit current u inh = 0 C 400 a t r rise time 30 ms t f fall time depending on i o 0 t t 0 inhibit 1 0.1 1 u o / u o nom t r t f 06001 sense lines (only for single output units 5.1 v, 12 v, 15 v, 24 v) this feature enables for compensation of voltage drops across the connector contacts and if necessary, across the load lines. if the sense lines are connected at the load rather than directly at the connector, the user should ensure that u o max (between vo1+ and vo1 C ) is not exceeded. we recommend connecting the sense lines directly at the fe- male connector. for further information, please refer to: application notes . to ensure correct operation, both sense lines (s+ and s C ) should be connected to their respective power outputs (vo1+ and vo1 C ) and the voltage difference between any sense line and its respective power output pin (as meas- ured on the connector) should not exceed the following val- ues: table 6: maximum voltage compensation allowed using sense lines output total voltage difference voltage difference voltage between sense lines and between their respective outputs vo and s 5.1 v < 0.5 v < 0.25 v 12 v, 15 v < 1.0 v < 0.25 v if the output voltages are increased above u o nom via r-in- put control, option p setting, remote sensing or option t, the output currents must be reduced accordingly so that p o nom is not exceeded. note: the output terminals vo1+ and vo1 C must always be connected to the load before connecting the sense lines s+ and s C , otherwise the unit will be damaged. auxiliary functions i inhibit for remote on and off note: with open i input: output is disabled ( u o = off). the outputs of the module may be enabled or disabled by means of a logic signal (ttl, cmos, etc.) applied between the inhibit input i and the negative pin of output 1 (vo1 C ). in systems with several units, this feature can be used, for ex- ample, to control the activation sequence of the converters. if the inhibit function is not required, connect the inhibit pin 18 to pin 14 to enable the outputs (active low logic, fail safe). for output response refer to: hold-up time and out- put response . vi+ vi C vo C i vo+ i inh u inh 06031 1.6 0.8 0 C 0.8 C 50 u inh [v] i inh [ma] C 30 0 C 10 10 30 50 2.0 1.2 0.4 C 0.4 u inh = 0.8 v u o = on u o = off u inh = 2.4 v 06032 fig. 13 definition of u inh and i inh . fig. 14 typical inhibit current i inh versus inhibit voltage u inh
rugged environment dc-dc converters >100 watt k series edition 4/4.99 15/31 melcher the power partners. programmable output voltage (r-function) as a standard feature, the modules offer an adjustable out- put voltage, identified by letter r in the type designation. the control input r (pin 16) accepts either a control voltage u ext or a resistor r ext to adjust the desired output voltage. when not connected, the control input automatically sets the output voltage to u o nom . a) adjustment by means of an external control voltage u ext between pin 16 (r) and pin 14: the control voltage range is 0...2.75 v dc and allows an output voltage adjustment in the range of approximately 0...110% u o nom . u o u ext = CCCCCC ? 2.5 v (approximate formula) u o nom b) adjustment by means of an external resistor: depending upon the value of the required output voltage the resistor shall be connected either: between pin 16 and pin 14 ( u o u o nom ) to achieve an output voltage adjustment range of approximately 100...110% u o nom . warning: C u ext shall never exceed 2.75 v dc. C the value of r' ext shall never be less than the lowest value as indicated in table r' ext for ( u o > u o nom ) to avoid damage to the unit! remarks: C the r-function excludes option p (output voltage adjust- ment by potentiometer). C if the output voltages are increased above u o nom via r- input control, option p setting, remote sensing or option t, the output current(s) should be reduced accordingly so that p o nom is not exceeded. C the r-input (as well as option p) is related to the main output. C with double output units the second output follows the value of the controlled main output. resistor values as indicated for the single output units should be used. C for correct output voltage adjustment of double output units the external wiring of the outputs should be accord- ing to: r-function for different output configurations , depending upon the desired output configuration. C in case of parallel connection the output voltages should be individually set within a tolerance of 1 - 2%. fig. 16 output voltage control for single output units ak...ek 1000 by means of the r input table 7a: r ext for u o < u o nom ; approximative values (u i nom , i o nom , series e 96 resistors); r' ext = u o nom = 5.1 v u o nom = 12 v u o nom = 15 v u o nom = 24 v u o (v) r ext [k ? ] u o [v] 1 r ext [k ? ] u o [v] 1 r ext [k ? ] u o [v] 1 r ext [k ? ] 0.5 0.422 2 4 0.825 2 4 0.56 4 8 0.825 1.0 1.0 3 6 1.3 4 8 1.47 6 12 1.33 1.5 1.62 4 8 1.96 6 12 2.61 8 16 1.96 2.0 2.16 5 10 2.87 8 16 4.64 10 20 2.87 2.5 3.83 6 12 3.83 9 18 6.19 12 24 3.83 3.0 5.61 7 14 5.62 10 20 8.25 14 28 5.61 3.5 9.09 8 16 8.28 11 22 11.0 16 32 8.25 4.0 14.7 9 18 12.1 12 24 16.2 18 36 12.1 4.5 28.7 10 20 19.6 13 26 26.1 20 40 19.6 5.0 196 11 22 42.2 14 28 56.2 22 44 46.4 table 7b: r ext for u o > u o nom ; approximative values (u i nom , i o nom , series e 96 resistors); r ext = u o nom = 5.1 v u o nom = 12 v u o nom = 15 v u o nom = 24 v u o [v] r' ext [k ? ] u o [v] 1 r' ext [k ? ] u o [v] 1 r' ext [k ? ] u o [v] 1 r' ext [k ? ] 5.15 422 12.1 24.2 1780 15.2 30.4 1470 24.25 48.5 3160 5.2 215 12.2 24.4 909 15.4 30.8 750 24.5 49.0 1620 5.25 147 12.3 24.6 623 15.6 31.2 511 24.75 49.5 1100 5.3 110 12.4 24.8 464 15.8 31.6 383 25.0 50.0 825 5.35 90.9 12.5 25.0 383 16.0 32.0 316 25.25 50.5 681 5.4 75 12.6 25.2 316 16.2 32.4 261 25.5 51.0 562 5.45 61.9 12.7 25.4 286 16.4 32.8 237 25.75 51.5 511 5.5 56.2 12.8 25.6 234 16.5 33.0 215 26.0 52.0 464 13.0 26.0 196 26.25 52.5 422 13.2 26.4 162 26.4 52.8 383 1 first column: single output units or double output units with separated outputs, second column: outputs in series connection r vo1+ vo1 C s C u ext vi+ vi C r ext r' ext 14 16 16 14 + s+ vo1+ vo1 C s C vi+ vi C r 12 05074
k series dc-dc converters >100 watt rugged environment edition 4/4.99 16/31 melcher the power partners. r-function for different output configurations fig. 17a ak...ek 2000 with h15 connector. r-input for output volt- age control. wiring for output voltage 24 v or 30 v or 48 v with main and second output connected in series. fig. 17b ak...ek 2000 with h15 connector. r-input for output volt- age control. wiring for output voltage 12 v or 15 v or 24 v with main and second output connected in parallel. fig. 17c ak...ek 2000 with h15 connector. r-input for output volt- age control. wiring of main and second output for two symmetrical output voltages u o1 and u o2 : 12 v or 15 v or 24 v. r' ext r ext 14 16 vo1 C vo1+ r vo2 C vo2 C vo2+ vo2+ 12 10 8 6 4 + C u o1 12 v 15 v 24 v 1 06005 r' ext r ext 14 16 vo1 C vo1+ r vo2 C vo2 C vo2+ vo2+ 12 10 8 6 4 u o2 0 v C 12/ C 15/ C 24 v +12/+15/+24 v u o1 1 1 + C 06006 r' ext r ext 14 16 vo1 C vo1+ r vo2 C vo2 C vo2+ vo2+ 12 10 8 6 4 u o1 +24/+30/+48 v +12/+15/+24 v 0 v u o2 1 1 2 + + 06007 r' ext r ext 14 16 vo1 C vo1+ r vo2 C vo2 C vo2+ vo2+ 12 10 8 6 4 + C u o1 24 v 30 v 48 v 1 2 06004 fig. 17d ak...ek 2000 with h15 connector. r-input for output volt- age control. wiring of main and second output for two output voltages u o1 and u o2 : +12 v and +24 v or +15 v and +30 v or +24 v and +48 v. fig. 17e ak...ek 2000 with h15 connector. r-input for output volt- age control. wiring of main and second output for two out- put voltages u o1 and u o2 : 12 v/12 v or 15 v/15 v or 24 v/24 v, the outputs are galvanically isolated. r' ext r ext 14 16 vo1 C vo1+ r vo2 C vo2 C vo2+ vo2+ 12 10 8 6 4 + C u o2 12 v 15 v 24 v C + 12 v 15 v 24 v u o1 1 1 06008 remarks: double output units ? tted with h-15 connectors have the output pins of the second output, pins 4/6 and 8/10, inter- nally paralleled. it is recommended that pins 4/6 and 8/10 be directly paral- leled at the female connector as well to reduce the voltage drop across the connector. please note: u o2 varies depending upon its own load and the load on output 1. 1 a ceramic multilayer capacitor connected across the output lines reduces ripple and spikes. 2 shortest possible wiring for series connection at the female con- nector
rugged environment dc-dc converters >100 watt k series edition 4/4.99 17/31 melcher the power partners. display status of leds u o1 > 0.95...0.98 u o1 adj u i max u i ov u i min u i uv u i u i abs ok i u o1 > 0.95...0.98 u o1 adj i o nom i ol i o ok i o l u o1 < 0.95...0.98 u o1 adj t c i t c max t ptc threshold u i inh i +50 v +0.8 v +2.4 v -50 v u inh threshold i o l led off led on led status undefined 06002 fig. 18 leds " ok " , " i " and " i o l " status versus input voltage conditions: i o i o nom , t c t c max , u inh 0.8 v u i uv = undervoltage lock-out, u i ov = overvoltage lock-out leds " ok " and " i o l " status versus output current conditions: u i min ... u i max , t c t c max , u inh 0.8 v led " i " versus case temperature conditions: u i min ... u i max , i o i o nom , u inh 0.8 v led " i " versus u inh conditions: u i min ... u i max , i o i o nom , t c t c max test sockets (main output only) test sockets for measuring the output voltage u o1 are lo- cated at the front of the module. the positive test socket is protected by a series resistor (see: functional description, block diagrams ). the voltage measured at the test sockets is approximetly 30 mv lower than the value measured at the output terminals. in case of double output units externally connected in se- ries for u o = 24 v, 30 v or 48 v the monitored output voltage is 12 v, 15 v or 24 v respectively.
k series dc-dc converters >100 watt rugged environment edition 4/4.99 18/31 melcher the power partners. which typically occur in most installations, but especially in battery driven mobile applications. the k series has been successfully tested to the following specifications: electromagnetic compatibility (emc) a suppressor diode or a metal oxide vdr (depending upon the type) together with an input fuse and an input filter form an effective protection against high input transient voltages electromagnetic immunity table 8: immunity type tests phenomenon standard 1 level coupling value waveform source test in per- mode 2 applied imped. procedure oper. form. 3 voltage surge iec 60571-1 i/c, +i/ C i 800 v p 100 s 100 ? 1 pos. and 1 neg. yes a 1500 v p 50 s voltage surge per 3000 v p 5 s coupling mode 4000 v p 1 s 7000 v p 100 ns supply related ria 12 a 4 +i/ C i 3.5 ? u batt 2/20/2 ms 0.2 ? 1 positive yes a surge b 1.5 ? u batt 0.1/1/0.1 s surge direct transient c +i/c, C i/c 960 v p 10/100 s5 ? 5 pos. and 5 neg. yes b d 1800 v p 5/50 s impulses e 3600 v p 0.5/5 s 100 ? f 4800 v p 0.1/1 s g 8400 v p 0.05/0.1 s indirect coupled h +o/c, C o/c, 1800 v p 5/50 s 5 transient j 3600 v p 0.5/5 s k 4800 v p 0.1/1 s l 8400 v p 0.05/0.1 s electrostatic iec/en 4 contact discharge 8000 v p 1/50 ns 330 ? 10 positive and yes a discharge 61000-4-2 air discharge 15000 v p 10 negative (to case) discharges electromagnetic iec/en 3 antenna 10 v/m am 80% n.a. 26 1000 mhz yes a field 61000-4-3 1 khz electromagnetic env 50204 50% duty cycle, 900 5 mhz yes a field, 200 hz repetition pulse modulated frequency electrical fast iec/en 4 capacitive, o/c 2000 v p bursts of 5/50 ns 50 ? 1 min positive yes a transient/burst 61000-4-4 i/o, +i/ C i 4000 v p 2.5/5 khz over 1 min negative direct 15 ms; burst transients per period: 300 ms coupling mode surge iec/en 3 i/c 2000 v p 1.2/50 s 12 ? 5 pos. and 5 neg. yes a 61000-4-5 4 +i/ C i2 ? surges per coupling mode conducted iec/en 3 i, o, signal wires 10 v rms am 80% 150 ? 0.15...80 mhz yes a disturbances 61000-4-6 (140 db v) 1 khz 1 related and previous standards are referenced in: technical information: standards . 2 i = input, o = output, c = case. 3 a = normal operation, no deviation from specifications, b = normal operation, temporary deviation from specs possible. 4 only met with extended input voltage range of ck (48 v battery) and ek (110 v battery) types. these units are available on cust om- er's request. standard dk units (110 v battery) will not be damaged, but overvoltage lock-out will occur during the surge. unde r nor- mal operation temporary deviation from specifications possible. 5 test in progress, please consult factory. note: previous standards are referenced in: technical information: standards .
rugged environment dc-dc converters >100 watt k series edition 4/4.99 19/31 melcher the power partners. fig. 19 typical disturbance voltage (quasi-peak) at the input ac- cording to cispr 11/22 and en 55011/22, measured at u i nom and i o nom. 90 80 70 60 50 40 30 20 10 0 0.01 0.05 0.1 0.5 1 2 5 10 20 30 u [db v] [mhz] 0.02 07037 a b f 50 40 30 20 10 0 30 50 100 200 500 1000 [db v/m] [mhz] a b 07077 fig. 20 typical radiated electromagnetic field strength (quasi- peak) according to cispr 11/22 and en 55011/22, nor- malized to a distance of 10 m, measured at u i nom and i o nom . electromagnetic emission
k series dc-dc converters >100 watt rugged environment edition 4/4.99 20/31 melcher the power partners. immunity to environmental conditions table 9: mechanical stress test method standard test conditions status ca damp heat iec/din iec 60068-2-3 temperature: 40 2 c unit not steady state mil-std-810d section 507.2 relative humidity: 93 +2/-3 % operating duration: 56 days ea shock iec/en/din en 60068-2-27 acceleration amplitude: 100 g n = 981 m/s 2 unit (half-sinusoidal) mil-std-810d section 516.3 bump duration: 6 ms operating number of bumps: 18 (3 each direction) eb bump iec/en/din en 60068-2-29 acceleration amplitude: 40 g n = 392 m/s 2 unit (half-sinusoidal) mil-std-810d section 516.3 bump duration: 6 ms operating number of bumps: 6000 (1000 each direction) fc vibration iec/en/din en 60068-2-6 acceleration amplitude: 0.35 mm (10...60 hz) unit (sinusoidal) mil-std-810d section 514.3 5 g n = 49 m/s 2 (60...2000 hz) operating frequency (1 oct/min): 10...2000 hz test duration: 7.5 h (2.5 h each axis) fda random vibration iec 60068-2-35 acceleration spectral density: 0.05 g n 2 /hz unit wide band din 40046 part 23 frequency band: 20...500 hz operating reproducibility acceleration magnitude: 4.9 g n rms high test duration: 3 h (1 h each axis) kb salt mist, cyclic iec/en/din iec 60068-2-52 concentration: 5% (30 c) unit not (sodium chloride duration: 2 h per cycle operating nacl solution) storage: 40 c, 93% rel. humidity storage duration: 22 h per cycle number of cycles: 3 table 10: temperature specifications, valid for an air pressure of 800...1200 hpa (800...1200 mbar) temperature standard -7 option -9 characteristics conditions min max min max unit t a ambient temperature 1 operational 2 C 25 71 C 40 71 c t c case temperature 3 C 25 95 C 40 95 t s storage temperature 1 non operational C 40 100 C 55 100 1 mil-std-810d section 501.2 and 502.2. 2 see: thermal considerations . 3 overtemperature lock-out at t c > 95 c (ptc). table 11: mtbf values at specified module types ground benign ground fixed ground mobile unit case temperature 40 c40 c70 c50 c mtbf 1 ak...ek 500'000 150'000 80'000 50'000 h device hours 2 500'000 1 calculated in accordance with mil-hdbk-217f. 2 statistical values, based on an average of 4300 working hours per year and in general field use, over 3 years.
rugged environment dc-dc converters >100 watt k series edition 4/4.99 21/31 melcher the power partners. fig. 21 case k02 with heatsink, case aluminium, black finish and self cooling, weight: approx. 1.55 kg note: C d 15 mm, recommended minimum distance to next part to ensure proper air circulation at full output power. C free air locations: the module should be moun- ted with fins in vertical position to achieve a maximum air flow through the heat sink. fig. 22 case k02 with option b1 (cooling plate),case aluminium, black finish and self cooling, weight: approx. 1.15 kg mechanical data dimensions in mm. tolerances 0.3 mm unless otherwise indicated. european projection 159 4.5 89 111 (3u) 168.5 0.5 d 80 4.5 19.7 9.5 29.9 6.5 51.5 30.3 20.3 12.1 10.3 7.0 3.27 7 te 9 te test jacks (+/ C ) option p ( u o ) option d ( u ti ) led ok (green) led i (red) led i ol (red) option d ( u to ) 25.9 11.8 front plate main face back plate measuring point of case temperature t c 171.93 (din 41494) 50 = ? 3.5 = ? 4.1 09002 42 gravitational axis 111 (3u) 17.3 133.4 168 0.5 101 5 47.2 158 5 m 4 5 measuring point of case temperature t c 50 171.93 (din 41494) 3.27 7 te 4 te 09003 note: long case with s-type heatsink or cooling plate b2, elongated by 60 mm for 220 mm rack depth, is available on request. (no led's and no test jacks.)
k series dc-dc converters >100 watt rugged environment edition 4/4.99 22/31 melcher the power partners. safety and installation instructions connector pin allocation the connector pin allocation table defines the electrical potentials and the physical pin positions on the h15/h15 s4 connector. pin no. 24, the protective earth pin present on all installation instructions the k series dc-dc converters are components, intended exclusively for inclusion within other equipment by an in- dustrial assembly operation or by professional installers. in- stallation must strictly follow the national safety regulations in compliance with the enclosure, mounting, creepage, clearance, casualty, markings and segregation require- ments of the end-use application. connection to the system shall be made via the female con- nector h15 (see: accessories ) . other installation methods may not meet the safety requirements. the dc-dc converters are provided with pin no. 24 ( ), which is reliably connected with their case. for safety rea- sons it is essential to connect this pin with the protective earth of the supply system unless specified in: safety of op- erator accessible output circuit . table 12: h15 and h15 s4 connector pin allocation pin connector type h15 s4 connector type h 15 no. ak 1000 (all), bk...ek 1001 ak 2000 bk ek 1301/1501/1601 bk ek 2000 4 vo1+ output 1 vo2+ output 2 vo1+ output 1 vo2+ output 2 6 vo1+ vo2+ 8 vo1 C output 1 vo2 C output 2 vo1 C output 1 vo2 C output 2 10 vo1 C vo2 C 12 s+ sense vo1+ output 1 s+ sense vo1+ output 1 14 s C sense vo1 C output 1 s C sense vo1 C output 1 16 r 1 control of u o1 r 1 control of u o1 r 1 control of u o1 r 1 control of u o1 18 i inhibit i inhibit i inhibit i inhibit 20 d 3 save data d safe data d save data d save data v 3 acfail 22 t current sharing t current sharing t current sharing t current sharing 24 2 protective earth protective earth protective earth protective earth 26 vi+ input vi+ input vi+ input vi+ input or neutral 28 vi+ vi+ 30 vi C input vi C input vi C input vi C input or phase 32 vi C vi C 1 feature r excludes option p and vice versa; 2 leading pin (pregrounding); 3 option d excludes option v and vice versa. fig. 23 view of module's male connectors 4/6 30/32 type h15 s4 fixtures for connector retention clips v (see accessory products ) 10010 4 32 type h15 fixtures for connector retention clips v (see accessory products ) 10010 an input fuse is built-in in the connection from pins no. 30 and 32 (vi-) of the unit. since this fuse is designed to pro- tect the unit in case of an overcurrent and does not neces- sarily cover all customer needs, an external fuse suitable for the application and in compliance with the local require- ments might be necessary in the wiring to one or both input potentials, pins nos. 26 and 28 and/or nos. 30 and 32. important: whenever the inhibit function is not in use, pin no. 18 (i) should be connected to pin no. 14 (s C / vo1 C ) to enable the output(s). do not open the modules, or guarantee will be invali- dated. ak...fk dc-dc converters is leading, ensuring that it makes contact with the female connector first.
rugged environment dc-dc converters >100 watt k series edition 4/4.99 23/31 melcher the power partners. due to high current values, all ak...fk units provide two in- ternally parallel connected contacts for certain paths (pins 4/6, 8/10, 26/28 and 30/32 respectively). it is recommended to connect load and supply to both female connector pins of each path in order to keep the voltage drop across the con- nector pins to an absolute minimum and to not overstress the connector contacts if currents are higher than approx. 8 a. the connector contacts are rated 8 a over the whole temperature range. make sure that there is sufficient air flow possible for con- vection cooling. this should be verified by measuring the case temperature when the unit is installed and operated in the end-use application. the maximum specified case tem- perature t c max shall not be exceeded. see also thermal considerations. if the end-product is to be ul certified, the temperature of the main isolation transformer should be evaluated as part of the end-product investigation. check for hazardous voltages before altering any connec- tions. ensure that a unit failure (e.g. by an internal short-circuit) does not result in a hazardous condition. see also: safety of operator accessible output circuit. cleaning agents in order to avoid possible damage, any penetration of cleaning fluids is to be prevented, since the power supplies are not hermetically sealed. isolation the electric strength test is performed as factory test in ac- cordance with iec/en 60950 and ul 1950 and should not be repeated in the field. melcher will not honour any guar- antee claims resulting from electric strength field tests. table 13: isolation characteristic input to input to output to output to unit case output case output electric required according to ak, bk 1.0 2.0 1 0.5 - kv rms strength iec/en 60950 1.4 2.8 1 0.7 - kv dc test voltage ck, dk 1.5 3.0 1 0.5 - kv rms ek, fk 2.1 4.2 1 0.7 - kv dc actual factory test 1 s ak, bk 2.8 5.6 1 1.4 0.14 ac test voltage equivalent ck, dk 2.0 4.0 1 1.0 0.1 kv rms to actual factory test ek, fk insulation resistance at 500 v dc > 300 > 300 > 300 > 100 2 m ? 1 in accordance with iec/en 60950 only subassemblies are tested in factory with this voltage. 2 tested at 150 v dc. for creepage distances and clearances refer to: technical information: safety. standards and approvals all dc-dc converters correspond to class i equipment. they are ul recognized according to ul 1950, ul recog- nized for canada to can/csa c22.2 no. 950-95 and lga approved to iec/en 60950 standards. the units have been evaluated for: ? building in, ? basic insulation between input and case and double or reinforced insulation between input and output, based on 150 v ac/dc (ak and bk) or 250 v ac and 400 v dc (ck, dk, ek, fk), ? the use in a pollution degree 2 environment, ? connecting the input to a primary or secondary circuit which is subject to a maximum transient rating of 2500 v. the dc-dc converters are subject to manufacturing sur- veillance in accordance with the above mentioned ul, csa, en and with iso 9001 standards.cleaning agents in order to avoid possible damage, any penetration of cleaning fluids is to be prevented, since the power supplies are not hermetically sealed. protection degree condition: female connector fitted to the unit. ip 30: all units except those with option p, and except those with option d or v with potentiometer. ip 20: all units fitted with option p, or with option d or v with potentiometer.
k series dc-dc converters >100 watt rugged environment edition 4/4.99 24/31 melcher the power partners. table 14: safety concept leading to an selv output circuit conditions front end dc-dc converter result nominal minimum required grade nominal dc minimum required types measures to achieve the safety status supply of isolation, to be provided output voltage safety status of the specified safety status of of the dc-dc voltage by the ac-dc front end, from the front end front end output the output circuit converter including mains supplied circuit output circuit battery charger mains operational (i.e. there is 100 v (the primary circuit ak double or reinforced selv circuit 150 v ac no need for electrical nominal voltage bk insulation, based on isolation between the between any input the mains voltage and 2 mains supply voltage pin and earth can (provided by the dc-dc and the dc-dc converter be up to 150 v ac converter) and earthed input voltage) or dc) case 3 mains 400 v (the ck 250 v ac nominal voltage dk between any input ek pin and earth can fk be up to 250 v ac or 400 v dc) basic 400 v unearthed ak supplementary insulation, hazardous voltage bk based on 250 v ac and secodary circuit ck double or reinforced dk insulation 2 (provided by ek dc-dc converter) and fk earthed case 3 . earthed double or reinforced hazardous voltage insulation 2 (provided by secondary circuit the dc-dc converter) earthed case 3 double or reinforced 60 v selv circuit operational insulation (provided by the dc-dc converter) 4 120 v tnv-3 circuit basic insulation (provided by the dc-dc converter) 4 1 the front end output voltage should match the specified input voltage range of the dc-dc converter. 2 based on the maximum nominal output voltage from the front end. 3 the earth connection has to be provided by the installer according to the relevant safety standard, e.g. iec/en 60950. 4 earthing of the case is recommended, but not mandatory. fig. 24 schematic safety concept. use earth connection as per table: safety concept leading to an selv output circuit . use fuse if required by the appli- cation. see also: installation instructions . ac-dc front end dc-dc con- verter mains battery selv earth connection + C ~ ~ 10044 max. 150 v ac or dc for ak, bk max. 250 v ac or 400 v dc for ck, dk, ek, fk fuse fuse max. 150 v ac or dc for ak, bk max. 250 v ac or 400 v dc for ck, dk, ek, fk safety of operator accessible output circuit if the output circuit of a dc-dc converter is operator acces- sible, it shall be an selv circuit according to the iec/en 60950 related safety standards. the following table shows some possible installation con- figurations, compliance with which causes the output circuit of the dc-dc converter to be an selv circuit according to iec/en 60950 up to a configured output voltage (sum of nominal voltages if in series or +/ C configuration) of 35 v. however, it is the sole responsibility of the installer to as- sure the compliance with the relevant and applicable safety regulations. more information is given in: technical infor- mation: safety .
rugged environment dc-dc converters >100 watt k series edition 4/4.99 25/31 melcher the power partners. r v : current limiting resistance = r s + r i = 15 ? [a] u i / r v <30 t [ms] capacitor c i fully charged normal operation (current limiting circuit is fully conducting) 0 0 i i = p i / u i 11039 fig. 26 inrush current with option e table 16: inrush current characteristics with option e characteristics ck dk ek unit u i nom , i o nom input voltage 60 110 220 v i inr p peak inrush 6.8 7.4 14.6 a current t inr inrush current 18 14 16 ms duration u i max , i o nom input voltage 140 220 380 v i inr p peak inrush 9.3 14.5 25.3 a current t inr inrush current 20 14 12 ms duration precaution: subsequent switch-on cycles at start-up are limited to max. 10 cycles during the first 20 seconds (cold unit) and at continuing on/off ( t c =95 c) max. 1 cycle every 8 sec. input filter control converter fet c i r i r s 10017 fig. 25 option e block diagram p potentiometer the potentiometer provides an output voltage adjustment range of +10/ C 60% of u o nom and is accessible through a hole in the front cover. this feature enables compensation of voltage drops across the connector and wiring. option p is not recommended if units are connected in parallel. option p excludes the r-function. with double output units both outputs are affected by the potentiometer setting (dou- bling the voltage setting if the outputs are in series). if the output voltages are increased above u o nom via r-in- put control, option p setting, remote sensing or option t, the output current(s) should be reduced accordingly so that p o nom is not exceeded. description of options table 15: survey of options option function of option characteristics -9 extended operational ambient temperature range t a = C 40 c...71 c e electronic inrush current limitation circuitry active inrush current limitation for ck, dk, ek p 1 potentiometer for fine adjustment of output voltage adjustment range +10/ C 60% of u o nom excludes r input d 2 input and/or output undervoltage monitoring circuitry safe data signal output (versions d0...dd) v 2 3 input (and output) undervoltage monitoring circuitry acfail signal according to vme specs (versions v0, v2, v3) t current sharing interconnect t-pins if paralleling outputs (5 units max.) b1/b2 cooling plate replaces standard heat sink, allowing direct chassis-mounting 1 function r excludes option p and vice versa. 2 option d excludes option v and vice versa . 3 only available if main output voltage u o1 = 5.1. -9 extended temperature range option -9 extends the operational ambient temperature range from C 25...71 c (standard) to C 40...71 c. the power supplies provide full nominal output power with convection cooling. option -9 excludes inrush current limitation by ntc. e inrush current limitation ck/dk/ek types may be supplemented by an electronic circuit (option e, replacing the standard built-in ntc) to achieve an enhanced inrush current limiting function (not available with ak/bk/fk types). if fitted with option e (inrush current limitation) together with option d6, input voltage monitoring, the ck units meet the cept/etsi standards for 48 v dc supply voltages accord- ing to prets 300132-2, version 4.2, date 9312. option d6, externally adjustable via potentiometer, is necessary to dis- able the converter at input voltages below actual service voltage ranges, avoiding an excessive input current when the input voltage is raised slowly according to prets 300132-2. option d6 threshold level should be ad- justed to 36.0...40.5 v for 48 v nominal supply systems or 44.0...50.0 v for 60 v nominal supply systems (refer also to description of option d). the d output should be connected to the inhibit input. please contact melcher if applications do not permit potentiometer setting.
k series dc-dc converters >100 watt rugged environment edition 4/4.99 26/31 melcher the power partners. vo+ vo C vo+ vo C load vo+ vo C 11003 fig. 27 an example of poor wiring for connection in parallel t current sharing this option ensures that the output currents are approxi- mately shared between all paralleled modules hence in- creasing system reliability. to use this facility, simply inter- connect the t pins of all modules and make sure, that pins 14, the s C pins (k 1000) or the vo1 C pins (k 2000) are also connected together. the load leads should have equal length and cross section to ensure equal voltage drops. not more than 5 units should be connected in parallel. if output voltage adjustment is requested we strongly recommend to use the r-input instead of option p, as with option p the re- quired setting accuracy is difficult to achieve. the output voltages must be individually set prior to paralleling to within a tolerance of 1...2% or the r pins should be con- nected together. fig. 28 paralleling of single output units using option t with the sense lines connected at the load 1 leads should have equal length and cross sections and should run in the same cable loom. 2 diodes recommended in redundant operation only 3 dc common point load 1 1 1 2 2 3 3 s+ vo+ vo C s C vi+ vi C t vi+ vi C s+ vo+ vo C s C t 1 max. 5 units in parallel connection 11036 load max. 5 units in parallel connection + C power bus module vo2 C vo2+ vo1 C vo1+ t module vo2 C vo2+ vo1 C vo1+ t 11037 fig. 29 paralleling of double output units using option t with power bus
rugged environment dc-dc converters >100 watt k series edition 4/4.99 27/31 melcher the power partners. fig. 30 option d1...d0: jfet output, i d 2.5 ma npn output (d5...dd): connector pin d is internally connected via the collector- emitter path of a npn transistor to the negative potential of output 1. u d < 0.4 v (logic low) corresponds to a monitored voltage level ( u i and/or u o1 ) > u t + u h . the current i d through the open collector should not exceed 20 ma. the npn output is not protected against external overvoltages. u d should not exceed 40 v. u i , u o1 status d output, u d u i or u o1 u t + u h low, l, u d 0.4 v at i d = 20 ma table 18: d-output logic signals version of d u i u t + u h resp. u o > u t configuration d1, d2, d3, d4, d0 low high jfet d5, d6, d7, d8, d9, dd high low npn jfet output (d0 d4): connector pin d is internally connected via the drain- source path of a jfet (self-conducting type) to the nega- tive potential of output 1. u d 0.4 v (logic low) corresponds to a monitored voltage level ( u i and/or u o1 ) < u t . the cur- rent i d through the jfet should not exceed 2.5 ma. the jfet is protected by a 0.5 w zener diode of 8.2 v against external overvoltages. u i , u o1 status d output, u d u i or u o1 u t + u h high, h, i d 25 a at u d = 5.25 v vo1+ vo1 C d u d i d r p input 11007 vo1+ vo1 C d u d i d r p input 11006 fig. 31 option d5...dd: npn output, u o1 40 v, i d 20 ma d undervoltage monitor the input and/or output undervoltage monitoring circuit op- erates independently of the built-in input undervoltage lock- out circuit. a logic "low" (jfet output) or "high" signal (npn output) is generated at pin 20 as soon as one of the moni- tored voltages drops below the preselected threshold level u t . the return for this signal is vo1 C . the d output recovers when the monitored voltage(s) exceed(s) u t + u h . the threshold levels u ti and u to are either adjustable by a potentiometer, accessible through a hole in the front cover, or factory adjusted to a fixed value specified by the cus- tomer. option d exists in various versions d0...dd as shown in the following table. table 17: undervoltage monitor functions output type monitoring minimum adjustment range typical hysteresis u h [% of u t ] jfet npn u i u o1 of threshold level u t for u t min ... u t max u ti u to u hi u ho d1 d5 no yes - 3.5...40 v 1 - 2.5...0.6 d2 d6 yes no u i min ... u i max 1 - 3.4...0.4 - d3 d7 yes yes u i min ... u i max 1 (0.95...0.985 u o1 ) 2 3.4...0.4 "0" d4 d8 no yes - (0.95...0.985 u o1 ) 2 - "0" d0 d9 no yes - 3.5...40 v 3 - 2.5...0.6 yes no u i min ... u i max 3 4 - 3.4...0.4 - yes yes u i min ... u i max 3 4 3.5...40 v 3 3.4...0.4 2.5...0.6 yes yes u i min ... u i max 3 4 (0.95...0.985 u o1 ) 2 3.4...0.4 "0" - dd yes yes u i min ... u i max 1 3.5...40 v 1 3.4...0.4 2.5...0.6 1 threshold level adjustable by potentiometer 2 fixed value tracking if u o1 is adjusted via r-input, option p or sense lines. 3 the threshold level permanently adjusted according to customer specification 2% at 25 c. any value within the specified range is basically possible but causes a special type designation in addition to the standard option designations (d0/d9 respectively)! 4 adjusted at i o nom
k series dc-dc converters >100 watt rugged environment edition 4/4.99 28/31 melcher the power partners. threshold tolerances and hysteresis: if u i is monitored, the internal input voltage after the input filter is measured. consequently this voltage differs from the voltage at the connector pins by the voltage drop d u ti across the input filter. the threshold levels of the d0 and d9 options are factory adjusted at nominal output current i o nom and at t a = 25 c. the value of d u ti depends upon the input voltage range (ck, dk, ..), threshold level u t , temperature and input current. the input current is a function of the input voltage and the output power. fig. 32 definition of u ti , ? u t i and ? u hi (jfet output) d u ti u hi u d low u d u d high u i p o = p o nom p o = 0 p o = 0 u ti p o = p o nom 11021 d-signal with respect to input and output voltage versus time: fig. 33 relationship between u i , u o1 , u d , u o1 /u o nom versus time 0 1 0.95 0 u i [v dc] 0 t t t t low min 4 t low min 4 t high min t h 1 u ti + u hi u ti input voltage failure switch-on cycle input voltage sag switch-on cycle and subsequent input voltage failure u d high u d low u d 0 jfet npn t u o1 u o1 nom u d high u d low u d t low min 4 t h 1 0 0 u d high u d low u d 0 jfet npn u o1 u d high u d low u d t low min 4 u to 3 output voltage failure 0 i d high i d low i d t 0 i d high i d low i d t t t t 3 2 33 33 u o1 nom u to + u ho input voltage monitoring output voltage monitoring 11008 1 hold-up time see section electrical input data 2 with output voltage monitoring, hold-up time t h = 0. 3 the signal will remain high if the d output is connected to an external source. 4 t low min = 100...170 ms, typically 130 ms.
rugged environment dc-dc converters >100 watt k series edition 4/4.99 29/31 melcher the power partners. v output (v0, v2, v3): connector pin v is internally connected to the open collec- tor of a npn transistor. the emitter is connected to the negative potential of output 1. u v 0.6 v (logic low) corre- sponds to a monitored voltage level ( u i and/or u o1 ) < u t . the current i v through the open collector should not exceed 50 ma. the npn output is not protected against external overvoltages. u v should not exceed 60 v. u i , u o1 status v output, u v u i or u o1 u t + u h high, h, i v 25 a at u v = 5.1 v fig. 34 output configuration of options v0, v2 and v3 vo1+ vo1 C v u v i v r p input 11009 formula for the external input capacitor: 2 ? p o ? ( t h + 0.3 ms) ? 100 c i ext = CCCCCCCCCCCCCCCCCCCCCC C c i min h ? ( u ti 2 C u i min 2 ) where as: c i min = internal input capacitance [mf] c i ext = external input capacitance [mf] p o = output power [w] h = efficiency [%] t h = hold-up time [ms] u i min = minimum input voltage [v] 1 u ti = threshold level [v] 1 min. input voltage according to electrical input data . for output voltages u o > u o nom , the minimum input voltage increases pro- portionally to u o / u o nom . remarks: option v2 and v3 can be adjusted by potentiometer to a threshold level between u i min and u i max . a decoupling di- ode should be connected in series with the input of ak...fk converters to avoid the input capacitance discharging through other loads connected to the same source voltage. v acfail signal (vme) available for units with u o1 = 5.1 v. this option defines an undervoltage monitoring circuit for the input or input and main output voltage ( u o1 nom = 5.1 v only) equivalent to option d and generates an acfail sig- nal (v signal) which conforms to the vme standard. the low state level of the acfail signal is specified at a sink current of i v 48 ma to u v 0.6 v (open-collector out- put of a npn transistor). the pull-up resistor feeding the open-collector output should be placed on the vme back plane. after the acfail signal has gone low, the vme standard requires a hold-up time t h of at least 4 ms before the 5.1 v output drops to 4.875 v when the output is fully loaded. this hold-up time t h is provided by the internal input capaci- tance. consequently the working input voltage and the threshold level u ti should be adequately above the mini- mum input voltage u i min of the converter so that enough energy is remaining in the input capacitance. if the input voltage is below the required level, an external hold-up ca- pacitor ( c i ext ) should be added. formula for threshold level for desired value of t h : 2 ? p o ? ( t h + 0.3 ms) ? 100 u ti = CCCCCCCCCCCCCCCCCCCCC + u i min 2 c i min ? h table 20: undervoltage monitor functions v output monitoring minimum adjustment range typical hysteresis u h [% of u t ] (vme compatible) of threshold level u t for u t min u t max u i u o1 u ti u to u hi u ho v2 yes no u i min ... u i max 1 C 3.4...0.4 C v3 yes yes u i min ... u i max 1 0.95...0.985 u o1 2 3.4...0.4 "0" v0 yes no u i min ... u i max 3 4 C 3.4...0.4 C yes yes u i min ... u i max 3 4 0.95...0.985 u o1 2 3.4...0.4 "0" 1 threshold level adjustable by potentiometer. 2 fixed value between 95% and 98.5% of u o1 (tracking). 3 adjusted at i o nom . 4 fixed value, resistor-adjusted ( 2% at 25 c) acc. to customer's specifications; individual type number is determined by melcher. voltage(s) exceed(s) u t + u h . the threshold level u ti is ei- ther adjustable by potentiometer, accessible through a hole in the front cover, or adjusted during manufacture to a de- termined customer specified value. versions v0, v2 and v3 are available as shown below. option v operates independently of the built-in input under- voltage lock-out circuit. a logic "low" signal is generated at pin 20 as soon as one of the monitored voltages drops be- low the preselected threshold level u t . the return for this signal is vo1 C . the v output recovers when the monitored table 19: available internal input capacitance and factory potentiometer setting of u ti with resulting hold-up time types ak bk fk ck dk ek unit c i min 0.83 0.3 1.2 0.66 0.26 0.21 mf u t i 9.5 19.5 39 39 61 97 v dc t h 0.1 0.1 3.4 1.1 1.1 2.7 ms
k series dc-dc converters >100 watt rugged environment edition 4/4.99 30/31 melcher the power partners. threshold tolerances and hysteresis: if u i is monitored, the internal input voltage is measured af- ter the input filter. consequently this voltage differs from the voltage at the connector pins by the voltage drop d u ti across the input filter. the threshold level of option v0 is ad- justed during manufacture at i o nom and t a = 25 c. the value of d u ti depends upon the input voltage range (ak, bk, ...), threshold level u t , temperature and input current. the input current is a function of input voltage and output power. d u ti u hi u v low u v u v high u i p o = p o nom p o = 0 p o = 0 u ti p o = p o nom 11023 fig. 35 definition of u ti , ? u ti and u hi 3 5.1 v 4.875 v 0 u i [v dc] 0 t t u ti + u hi u ti input voltage failure switch-on cycle input voltage sag switch-on cycle and subsequent input voltage failure u v high u v low u v 0 v2 t u o1 0 u v high u v low u v 0 v2 u i u ti 4 output voltage failure 0 u v high u v low u v 3 u ti + u hi t low min 2 t low min 2 t low min 2 3 3 4 4 u v high u v low u v 0 v3 t 3 t low min 2 t low min 2 3 3 t h 1 2.0 v t h 1 4 3 4 t low min 2 v3 5.1 v 4.875 v 0 u o1 2.0 v input voltage monitoring output voltage monitoring 11010 t t t t fig. 36 relationship between u i , u o1 , u v , i v and u o1 /u o nom ver- sus time. 1 vme request: minimum 4 ms 2 t low min = 40...200 ms, typically 80 ms 3 u v level not defined at u o1 < 2.0 v 4 the v signal drops simultaneously with the output voltage. if the pull-up resistor r p is connected to vo1+. the v signal remains high if r p is connected to an external source.
rugged environment dc-dc converters >100 watt k series edition 4/4.99 31/31 melcher the power partners. accessories a variety of electrical and mechanical accessories are available including: C front panels for 19" rack mounting, schroff and intermas systems. C mating h15/h15 s4 connectors with screw, solder, fast- on or press-fit terminals. C connector retention facilities. C code key system for connector coding. C chassis mounting plates for mounting the 19" cassette to a chassis/wall where only frontal access is given. C universal mounting bracket for din-rail or chassis moun- ting. for more detailed information please refer to: accessory products . h15 female connector, code key system front panels mounting plate (option b1 essential), connector retention clips universal mounting bracket for din-rail mounting. b1/b2 cooling plate (see: mechanical data ) where a cooling surface is available, we recommend the use of a cooling plate (option b1) instead of the standard heatsink. the mounting system should ensure sufficient cooling capacity to guarantee that the maximum case tem- perature t c max is not exceeded. the cooling capacity is cal- culated by: (100% C h ) p loss = CCCCCCCCCC ( u o ? i o ) h efficiency h see type survey elongated case for 220 mm rack depth: option b2

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