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` datasheet ds_e48s h 1 r250_ 110 12013 features ? high efficiency: 86 .5 % @ 1.2 v/ 5 0 a ? size : 58.4mm x 22. 8 mm x 9.5 mm (2.30 x 0.90 x 0. 37 ) ? industry standard pin out ? fixed frequency operation ? input uvlo , output otp, ocp, ovp ? monotonic startup into normal and pre - biased loads ? secondary side control, very fast transient response ? 2250v isolation and b asic insulation ? no minimum load re quired ? no negative current during power or enable on/off ? iso 900 1 , tl 9000, iso 14001 , qs 9000, ohsas 18001 certified manufacturing facility ? ul/cul 60950 (us & canada) recognized, and tuv (en60950) certified ? ce mark meets 73/23/eec and 93/68/eec directive applications ? telecom/datacom ? wireless net works ? optical network equipment ? server and data storage ? industrial/test equipment options ? positive on/off logic ? short pin lengths available ? external synchronization ? output ovp latch mode ? output ocp latch mode ? heat spreader delphi series e48sh, 12 0 w eighth brick family dc/dc power modules: 48v in, 1 . 2 v/ 5 0 a out the delphi series e48sh eighth brick, 48v input, single output , isolated dc/dc converters are the latest offering from a world leader in power systems technology and manufactu ring D delta electronics, inc. this product family is available in either a through - hole or surface - mounted package and provides up to 120 watts of power or 50 a of output current ( 1.2v and below ) in an industry standard footprint and pinout. the e48sh conv erter operates from an input voltage of 36v to 75v and is available in output voltages from 1.0v to 15v. efficiency is up to 86.5% for 1.2v output at 50a full load. with c reative design technology and optimization of component placement , these converters p ossess outstanding electrical and thermal performance, as well as extremely high reliability under highly stressful operating conditions. all models are fully protected from abnormal input/output voltage, current, and temperature conditions. the delphi se ries converters meet all safety requirements with basic insulation.
e48sh1r250_ 110 12013 2 technical specificat ions ( t a =25c, airflow rate=300 lfm, v in =48vdc, nominal vout unless otherwise noted.) parameter notes and conditions e48s h1r250 (standard) min. typ. max. units absolute maximum ratings input voltage continuous 80 vdc transient (100ms) 100ms 100 vdc operating temperature refer to figure 2 1 for measuring point - 40 130 c storage temperature - 55 125 c input/output isolation voltage 2250 vdc input characteristics oper ating input voltage 36 75 vdc input under - voltage lockout turn - on voltage threshold 33 34 35 vdc turn - off voltage threshold 31 32 33 vdc lockout hysteresis voltage 1 2 3 vdc maximum input current 100% load, 36vin 2.3 a no - load input curre nt 50 ma off converter input current 3 ma inrush current(i 2 t) 1 a 2 s input reflected - ripple current p - p thru 12h inductor, 5hz to 20mhz 20 ma input voltage ripple rejection 120 hz 50 db output characteristics output voltage set poin t vin=48v, io=io.max, tc=25c 1.18 8 1.20 1.21 2 vdc output voltage regulation over load io=io,min to io,max 3 10 mv over line vin=36v to 75v 3 10 mv over temperature tc= - 40c to 85 c 15 mv total output voltage range over sample load, line and temperature 1.176 1.22 4 v output voltage ripple and noise 5hz to 20mhz bandwidth peak - to - peak full load, 1f ceramic, 10f tantalum 50 110 mv rms full load, 1f ceramic, 10f tantalum 1 0 20 mv operating output current range 0 50 a output dc current - limit inception output voltage 10% low 105 135 % dynamic characteristics output voltage current transient 48v, 1 0f tan & 1f ceramic load cap, 0.1 a/s positive step change in output current 50% io.max to 75% io.max 25 mv negati ve step change in output current 75% io.max to 50% io.max 25 mv settling time (within 1% vout nominal) 100 us turn - on transient start - up time, from on/off control 13 ms start - up time, from input 13 ms maximum output capacitance full lo ad; no overshoot of vout at startup 40 000 f efficiency 100% load 86 .5 % 60% load 89. 5 % isolation characteristics input to output 2250 vdc isolation resistance 10 m isolation capacitance 1000 pf feature characteristics switching frequency 2 40 khz on/off control , negative remote on/off logic logic low (module on) von/off at ion/off=1.0ma 1.2 v logic high (module off) von/off at ion/off=0.0 a 3 50 v on/off control, positive remote on/off logic logic low (module off) von/off at ion/off=1.0ma 1.2 v logic high (module on) von/off at ion/off=0.0 a 3 50 v on/off current (for both remote on/off logic) ion/off at von/off=0.0v 1 ma leakage current (for both remote on/off logic) logic high, von/ off=1 5 v 50 ua output voltage trim range across pins 9 & 5, pout Q max rated power - 20 10 % output voltage remote sense range pout Q max rated power 10 % output over - voltage protection over full temp range; % of nominal vout 118 130 % general spec ifications mtbf io= 8 0% of io, max; 300lfm @25 4.66 m hours weight 25 grams over - temperature shutdown refer to figure 2 1 for measuring point 135 c
e48sh1r250_ 110 12013 3 electrical character istics curves figure 1: efficiency vs. load current for minimum, nominal, and maximum input voltage at 25c figure 2: power dissipation vs. load current for minimum, nominal, and maximum input voltage at 25c. figure 3: typical full load input characteristics at room temperature 0 0.5 1 1.5 2 2.5 3 30 34 38 42 46 50 54 58 62 66 70 74 78 input voltage(v) inpu t current(a)
e48sh1r250_ 110 12013 4 ele ctrical characterist ics curves for negative remote on/off logic figure 4: turn - on transient at zero load current (5ms/div). vin=48v .top trace: vout , 1 v/div; bottom trace: on/off input , 5 v/div figure 5: turn - on transient at full rated load current (constant current load) (5ms/div). vin=48v . top trace: vout , 1v/div; bottom trace: on/off input , 5 v/div for input voltage start up figure 6 : turn - on transient at zero load c urrent ( 5 ms/div). vin=48v . bottom trace: vout , 1 v/div , top trace: input voltage , 5v/div figure 7: turn - on transient at full rated load current (constant current load) ( 5 ms/div). vin=48v . bottom trace: vout , 1 v/div; top trace: input voltage , 5v/div
e48sh1r250_ 110 12013 5 ele ctrical characterist ics curves figure 8: output voltage response to step - change in load current (75% - 50% of io, max; di/dt = 0.1a/s). load cap: 10f, tantalum capacitor and 1f ceramic capacitor. trace: vo ut (2 0 mv/div , 100us /div ), scope measurement should be made using a bnc cable (length shorter than 20 inches). position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.. figure 9: output voltage response to step - change in load curre nt (50% - 75% of io, max; di/dt = 0.1a/s). load cap: 10f, tantalum capacitor and 1f ceramic capacitor. trace: vout ( 2 0 mv/div , 100us /div ), scope measurement should be made using a bnc cable (length shorter than 20 inches). position the load between 51 mm t o 76 mm (2 inches to 3 inches) from the module.. figure 10: test set - up diagram showing measurement points for input terminal ripple current and input reflected ripple current. note: measured input reflected - ripple curr ent with a simulated source inductance (l test ) of 12 h. capacitor cs offset possible battery impedance. measure current as shown above figure 1 1: input terminal ripple current, i c , at full rated output current and nominal input voltage with 12h source i mpedance and 33f electrolytic capacitor ( 20 0 ma/div , 2us /div ).
e48sh1r250_ 110 12013 6 electrical character istics curves figure 1 2: input reflected ripple current, i s , through a 12h source inductor at nominal input voltage and rated load current ( 2 0 ma/div , 2us /div ). figure 1 3: output voltage noise and ripple measurement test setup figure 1 4: output voltage ripple at nominal input voltage and rated load current (io=5 0 a) ( 20 mv/div , 2us /div ) load capacitance: 1f c eramic capacitor and 10f tantalum capacitor. bandwidth: 20 mhz. scope measurements should be made using a bnc cable (length shorter than 20 inches). position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module. figure 1 5: output volta ge vs. load current showing typical current limit curves and converter shutdown points. strip copper vo(-) vo(+) 10u 1u scope resistive load 0 0.5 1 1.5 2 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 output current (a) output voltage (v)
e48sh1r250_ 110 12013 7 ? the input source must be insulated from the ac mains by reinforced or double insulation. ? the input terminals of the module are not operator accessible. ? if the metal baseplate is grounded , o ne vi pin and one vo pin shall also be grounded. ? a selv reliability test is conducted on the system where the module is used , in combination with the module, to ensure that under a single fault, hazardous voltage does not appear at the modules output. when installed into a class ii equipment (without grounding), spacing consideration should be given to the end - use installation, as the spacing between the module and mounting surface have not been evaluated. the power module has extra - low voltage (elv) outputs when all inputs are elv. this power module is not internally fused. to achieve optimum safety and system protection, an input line fuse is highly recommended. the safety agencies require a normal - blow fuse with 2 0 a maximum rating to be installed in the ungrounded lead. a lower rated fuse can be used based on the max imum inrush transient energy and maximum input current. soldering and cleaning considerations post solder cleaning is usually the final board assembly process before the board or system undergoes electrical testing. inadequate cleaning and/or drying may lower the reliability of a power module and severely affect the finished circuit board assembly test. adequate cleaning and/or drying is especially important for un - encapsulated and/or open frame type power modules. for assistance on appropriate soldering and cleaning procedures, please contact deltas technical support team. design consideration s input source impedance the impedance of the input source connecting to the dc/dc power modules will interact with the modules and affect the stability. a low a c - impedance input source is recommended. if the source inductance is more than a few h, we advise adding a 10 to 100 f electrolytic capacitor (esr < 0.7 at 100 khz) mounted close to the input of the module to improve the stability. layout and emc cons iderations deltas dc/dc power modules are designed to operate in a wide variety of systems and applications. for design assistance with emc compliance and related p w b layout issues, please contact deltas technical support team. an external input filter module is available for easier emc compliance design. application notes to assist designers in addressing these issues are pending release. safety considerations the power module must be installed in compliance with the spacing and separation requiremen ts of the end - users safety agency standard, i.e., ul60950, can/csa - c22.2 no. 60950 - 00 and en60950: 2000 and iec60950 - 1999 , if the system in which the power module is to be used must meet safety agency requirements. basic insulation based on 75 vdc input is provided between the input and output of the module for the purpose of applying insulation requirements when the input to this dc - to - dc converter is identified as tnv - 2 or selv. an additional evaluation is needed if the source is other than tnv - 2 or se lv. when the input source is selv circuit , the power module meets selv (safety extra - low voltage) requirements. if the input source is a hazardous voltage which is greater than 60 vdc and less than or equal to 75 vdc, for the modules output to meet selv requirements, all of the following must be met:
e48sh1r250_ 110 12013 8 features description s over - current protection the e48sh modules include an internal output over - current protection circuit, which will endure current limiting for an unlimited duration during output overl oad. when the output current exceeds the ocp set point, in option code a, the current limit function will work by initially reduce duty cycle of the module, the unit will go out of regulation but remains in safe operating area before the output drops below 50%. when output drops below 50%, the modules will automatically shut down and enter hiccup mode . in option code b (available for 1.2v, 1.8v, and 2.5v) , when the output current exceeds the ocp set point, the modules will immediately shut down and enter hi ccup mode . during hiccup, the modules will try to restart after shutdown. if the overload condition still exists, the module will shut down again. this restart trial will continue until the overload condition is corrected. over - voltage protection the mo dules include an internal output over - voltage protection circuit, which monitors the voltage on the output terminals. if this voltage exceeds the over - voltage set point, the module will shut down and restart after 200ms. latch - off mode is optional. under l atch off mode the over - voltage latch is reset by either cycling the input power or by toggling the on/off signal for one second. over - temperature protection the over - temperature protection consists of circuitry that provides protection from thermal dama ge. if the temperature exceeds the over - temperature threshold the module will shut down. the module will try to restart after shutdown. if the over - temperature condition still exists during restart, the module will shut down again. this restart trial wil l continue until the temperature is within specification. remote on/off the remote on/off feature on the module can be either negative or positive logic. negative logic turns the module on during a logic low and off during a logic high. positive logic tu rns the modules on during a logic high and off during a logic low. remote on/off can be controlled by an external switch between the on/off terminal and the v i ( - ) terminal. the switch can be an open collector or open drain. for negative logic i f the rem ote on/off feature is not used, please short the on/off pin to vi( - ). for pos i tive logic i f the remote on/off feature is not used, please leave the on/off pin to floating . figure 1 6: remote on/off implementation remote sense remote sense compensates for voltage drops on the output by sensing the actual output voltage at the point of load. the voltage between the remote sense pins and the output terminals must not exceed the output voltage sense range given here: [vo(+) C vo( C )] C [sense(+) C sense( C ) ] 10% v out this limit includes any increase in voltage due to remote sense compensation and output voltage set point adjustment (trim). figure 1 7: effective circuit configuration for remote sense operation if the remote sense feature is not used to regulate the output at the point of load, please connect sense(+) to vo(+) and sense( C ) to vo( C ) at the module . the output voltage can be increased by both the remote sense and the trim; however, the maximum increase is the larger of either the remote sense or the trim, not the sum of both. when using remote sense and trim, the output voltage of the module is usually increased, which increases the power output of the module with the same output current. care should be taken to ensure that the maximum output power does not exceed the maximum rated power. vo(+) vi(+) vo(-) sense(-) sense(+) vi(-) on/off vi(-) vi(+) vo(-) vo(+) sense(+) sense(-) resistance contact contact and distribution losses
e48sh1r250_ 110 12013 9 feat ures descriptions (con.) output voltage adjustment (trim) to increase or decrease the output voltage set point, the modules may be connected with an external resistor between the trim pin and either the sense(+) or sense( - ). the trim pin should be left o pen if this feature is not used. figure 1 8: circuit configuration for trim - down (decrease output voltage) if the external resistor is connected between the trim and sense ( - ) pins, the output voltage set point decreases (fig.18). the external resistor value required to obtain a percentage of output voltage change ex. when trim - down - 10 %( 1.2v0. 9 =1.08v) figure 19: circuit configuration for trim - up (increase output voltage) if the external resistor is connected between the trim and sense ( + ) the output voltage set point increases (fig. 19). the external resistor value require d to obtain a percentage output voltage chang e ex. when trim - up +10%( 1 . 2 v1.1=1.32v) the output voltage can be increased by both the remote sense and the trim, however the maximum increase is the larger of either the remote sense or the trim, not the sum of both. when using remote sense and trim, the output voltage of the module is usually increased, which increases the power output of the module with the same output current. care should be taken to ensure that the maximum output p ower of the module remains at or below the maximum rated power. frequency synchronization this product family can be synchronized with external clock signal to the trim pin. this reduces system noise and interference in multiple converter systems. ? ? ? ? ? ? ? k down rtrim 2 . 10 511 ? ? ? ? ? ? ? k down rtrim 9 . 40 2 . 10 10 511 ? ? 5.11vo (100 ) 511 10.2 0.6 rtrim up k ?? ? ? ? ? ? ?? ? ? 5.11 1.2 (100 10 ) 511 10.2 51 0.6 10 10 rtrim up k ? ? ? ? ? ? ? ? ? ?
e48sh1r250_ 110 12013 10 thermal consideratio ns thermal management is an important part of the system design. to ensure proper, reliable operation, sufficient cooling of the power module is needed over the entire temperature range of the module. convection cooling is usually the dominant mode of heat transfer. hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel. thermal testing setup deltas dc/dc power modules are characterized in heated vertical wind tunnels that simulate the thermal environments encountered in most electronics equipment. this type of equipment commonly uses vertically mounted circuit cards in cabinet racks in which the power modules are mounted. the following figure shows the wind tunnel characterization setup. the power module is mounted on a test pwb and is vertically positioned within the wind tunnel. the space between the neighboring pwb and the top of the power module is constantly kept at 6.35mm (0.25). figure 2 0 : wind tunnel test setup th ermal derating heat can be removed by increasing airflow over the module. the hottest point temperature of the module is 125 . to enhance system reliability; the power module should always be operated below the maximum operating temperature. if the temper ature exceeds the maximum module temperature, reliability of the unit may be affected. thermal curves figure 2 1: case t emperature measurement location. pin locations are for reference only. the allowed maximum hot spot temperature is defined at 130 figure 2 2: output current vs. ambient temperature and air velocity @ v in = 48v (transverse orientation ) note: wind tunnel test setup figure dimensions are in millimeters and (inches) 12.7 (0.5) module air flow 50.8 (2.0) facing pwb pwb air velocity and ambient temperature measured below the module e48sh1r250(standard) output current vs. ambient temperature and air velocity @vin = 48v (transverse orientation) 0 5 10 15 20 25 30 35 40 45 50 30 35 40 45 50 55 60 65 70 75 80 85 ambient temperature ( ) output current(a) natural convection 100lfm 200lfm 300lfm 400lfm 500lfm 600lfm
e48sh1r250_ 110 12013 11 pick and place locat ion surfa ce - mount tape & reel recommended pad layo ut (smd)
e48sh1r250_ 110 12013 12 lea ded (sn/ pb ) process recommend temp. profile note: the temperature refers to the pin of e48sh, measured on the pin + vout joint. lead free (sac) proc ess recommend temp. profile note: the temperature refers to the pin of e48sh, measured on the pin +vout joint. temp . time 150 200 100~140 sec. time limited 90 sec. above 217 217 preheat time ramp up max. 3 ramp down max. 4 peak temp. 240 ~ 245 25
e48sh1r250_ 110 12013 13 mechanical drawing ( without heatspreader ) surface - mount module through - hole module pin no. name function 1 2 3 4 5 6 7 8 +vin on/off - vin - vout - sense trim +sense +vou t positive input voltage remote on/off negative input voltage negative output voltage negative remote sense output voltage trim positive remote sense positive output voltage
e48sh1r250_ 110 12013 14 mechanical drawing ( with heatspreader) through - hole module
e48sh1r250_ 110 12013 15 part numbering syste m e 48 s h 1r2 50 n r f a type of product input voltage number of outputs product series output voltage output current on/off logic pin length option code e - eighth brick 48 - 36v~75v s - s ingle h - 50a series 1r2 - 1.2 v 5 0 - 50 a n - negative p - positive r - 0.170 n - 0.145 k - 0.110 m - smd f - rohs 6/6 (lead free) a - standard functions, with output ocl b - standard functions, with output ocp (available for 1.2v, 1.8v, and 2.5v) h - with heat spread er model list model name input output eff @ 100% load e48sh1r250nrfa 36v~75v 2.3a 1.2v 50a 8 6.5 % e48sh1r5 4 0nrfa 36v~75v 2.2a 1.5v 40a 89% e48sh1r840nrfa 36v~75v 2.7a 1.8v 40a 9 0 % e48sh2r535nrfa 36v~75v 2.9a 2.5v 35a 89.5% e48sh3r3 30 nr fa 36v~75v 3.6a 3.3v 30a 9 2 % e48sh050 20 nrfa 36v~75v 3.7a 5.0v 20a 9 0 % e48sh12010nrfa 36v~75v 4.3a 12v 10a 93.5% default remote on/off logic is negative and pin length is 0.170 for different remote on/off logic and pin length, please refer to part numbering system abo ve or contact your local sales office . c ontact: www.deltaww.com/dcdc usa: telephone: east coast: 978 - 656 - 3993 west coast: 510 - 668 - 5100 fax: (978) 656 3964 email: dcdc@delta - corp.com europe: telephone: +31 - 20 - 655 - 0967 fax: +31 - 20 - 655 - 0999 email: dcdc@delta - es. com asia & the rest of world : telephone: +886 3 4526107 x 6220 ~6224 fax: +886 3 4513485 email: dcdc@delta.com.tw warranty delta offers a two ( 2) year limited warranty. complete warranty information is listed on our web site or is available upon request from delta. information furnished by delta is believed to be accur ate and reliable. however, no responsibility is assumed by delta for its use, nor for any infringements of patents or other rights of third parties, which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of delta. delta reserves the right to revise these specifications at any time, without notice .

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