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? concord, california 94520 ph: 925/687-4411 or 800/542-3355 fax: 925/687-3333 www.calex.com email: sales@ca lex.com 1

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%&&%' features very low noise, < 50 mv p-p maximum pcb mounting with optional heat sink or chassis mount versions efficiencies to 87% common and differential mode input filtering remote sense on +5 volt output single and dual outputs are isolated from each other no derating to 80c case temperature five year warranty description the 55 watt triple series consists of separate power sections for the single and dual outputs. these power sections are operated in anti-phase to each other to reduce the ripple current stress on the input components and the reflected input ripple. the main benefit of two separate power sections is the excellent regulation achieved by all outputs. an order of magnitude regulation improvement is obtained over competitive designs. there is no cross regulation between +5 output and the dual outputs. this means that the dual output voltages are independent of the +5 volt loading and visa versa. excellent noise performance is attained by using a 0.040 inch thick aluminum case, pot core and toroidal magnetics, double shielded transformers and both normal mode and common mode input filtering. the input and outputs are protected from overvoltage by transient voltage suppressor diodes. the outputs are protected from faults with pulse by pulse digital current limiting. 55 watt triple series block diagram t r a h c n o i t c e l e s l e d o m e g n a r t u p n i c d v s t u p t u o c d v s t u p t u o a m n i mx a m k 2 1 . 5 t 2 10 . 90 . 8 12 1 , 50 5 2 1 , 0 0 0 5 k 5 1 . 5 t 2 10 . 90 . 8 15 1 , 50 0 0 1 , 0 0 0 5 k 2 1 . 5 t 4 20 . 8 10 . 6 32 1 , 50 5 2 1 , 0 0 0 5 k 5 1 . 5 t 4 20 . 8 10 . 6 35 1 , 50 0 0 1 , 0 0 0 5 k 2 1 . 5 t 8 40 . 6 30 . 2 72 1 , 50 5 2 1 , 0 0 0 5 k 5 1 . 5 t 8 40 . 6 30 . 2 75 1 , 50 0 0 1 , 0 0 0 5

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concord, california 94520 ph: 925/687-4411 or 800/542-3355 fax: 925/687-3333 www.calex.com email: sales@ca lex.com 2 (5) the remote sense pins must be connected to their respective output pins for proper output voltage and regulation. the combined drop on each output line to it ? s respective remote sense pin must be less than 0.3 volts or 0.6 volts for both sense lines combined. (6) cross regulation is defined as the change in one output when the other output is changed from minimum to maximum load. (7) short term stability is specified after a 30 minute warm-up at full load, constant line, load and ambient conditions. (8) transient response is defined as the time for the output to settle from a 50 to 75% step load change to a 2% error band (rise time of step = 2 sec). (9) dynamic response is defined as the peak overshoot during a transient as defined in note 8 above. (10) the input ripple rejection is specified for dc to 120 hz ripple with a modulation amplitude of 1% of vin. notes * all parameters measured at tc = 25 c, nominal input voltage and full rated load unless otherwise noted. refer to the calex application notes for the definition of terms, measurement circuits and other information. (2) noise is measured per calex application notes. measurement bandwidth is 0 - 20 mhz. (3) determine the correct fuse size by calculating the maximum dc current drain at low line input, maximum load and then adding 20 to 25% to get the desired fuse size. a slow blow type fuse is recommended. for reverse voltage protection on the input this fuse must be used. (4) minimum load is required for rated regulation only, no module damage will occur if the output is run at less than minimum load. maximum output power on the dual section is 30 watts (i.e. one output can draw 30 watts and the other 0 watts). regulation degrades with substantial loading unbalance. *sretemaraptupni ledo mk 21.5t2 1k 51.5t2 1k 21.5t4 2k 51.5t4 2k 21.5t8 3k 51.5t8 4s tinu egnaregatlov nim xam 0.9 0.81 0.81 0.63 0.63 0.27 cdv wbzhm02-0,)2(elppirdetcelfer pyt xam 011 052 06 051 53 08 p-pam daollluftnerructupni daolon pyt pyt 0365 05 5172 53 5231 03 am ycneiciff ep y t1 85 87 8% ycneuqerfgnihctiw sp y t0 8z hk sm001,egatlovrevotupnimumixam egamadon xa m3 25 45 8c dv rorretuptuo%1,emitno-nru tp y t0 7s m esufdednemmocer )3 (s pma *sretemaraptuptuo ledom k51.5t21k21.5t21 k51.5t42k21.5t42 k51.5t84k21.5t84 k21.5t42k21.5t21 k21.5t84 k51.5t42k51.5t21 k51.5t84 stinu egatlovtuptu o5 +2 1 5 1 c dv )4(tnerrucdetar nim xam 05 0005 013 0521 052 0001 am egnaregatlov )5(daol%001 nim pyt xam 059.4 000.5 050.5 529.11 000.21 570.21 529.41 000.51 570.51 vdc ecnalabtuptuo )daollluf,tuptuosunimotsulp( pyt xam a/n 5.0 7.0 5.0 7.0 % %001-%52noitalugerdaol %001-1 pyt xam pyt xam 20.0 2.0 20.0 2.0 8.0 2.1 0.2 0.4 7.0 2.1 0.2 0.4 % )6(noitalugerssorc pyt xam a/n a/n 8.0 2.1 7.0 2.1 % noitalugerenil cdvxam-nim=niv pyt xam 20.0 2.0 % )7(ytilibatsmrettroh sp y t2 0. 0% ytilibatsmretgno lp y t2 . 0s rhk/% )8(esnopsertneisnar tp y t0 0 50 0 40 0 4s )9(esnopsercimany dp y t0 5 20 5 20 0 2k aepvm )01(noitcejerelppirtupn ip y t5 25 15 1b d wbzhm02-0,esion pyt xam 51 05 p-pvm tneiciffeocerutarepmet pyt xam 05 001 05 002 05 002 c /mpp )11(pmalcegatlovrev op y t8 . 65 18 1c dv otnoitcetorptiucrictrohs stuptuollarofnommoc dnagnitimiltnerruchtiwnoitcetorpsuounitnocsruoh8fomuminimsedivorp seuqinhcetdaolrevolamreht

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concord, california 94520 ph: 925/687-4411 or 800/542-3355 fax: 925/687-3333 www.calex.com email: sales@ca lex.com 3 heat sink option (-hs suffix) chassis mount option (-cm suffix) bottom view mounting configuration options to order the optional heat sink on the pin mount version place a ? -hs ? suffix on the part number. to order the chassis mount version place a ? -cm ? suffix on the part number. the heat sink and chassis mount options cannot be used together. (11) for module protection only, see also note 3. (12) the on/off pin is open collector ttl, cmos, and relay compatible. the input to this pin is referenced to -input (pin 2). (13) the functional temperature range is intended to give an additional data point for use in evaluating this power supply. at the low functional temperature the power supply will function with no side effects, however, sustained operation at the high functional temperature will reduce expected operational life. the data sheet specifications are not guaranteed over the functional temperature range. (14) the case thermal impedance is specified as the case temperature rise over ambient per package watt dissipated. the thermal resistance of the chassis mount version depends on the mounting surface. if the mounting surface is a poor thermal conductor the thermal resistance can be as high as 2.7 c/watt. if the mounting surface is an excellent thermal conductor the thermal resistance can be below 1 c/watt. mechanical tolerances unless otherwise noted: x.xx dimensions: 0.020 inches x.xxx dimensions: 0.005 inches seal around terminals is not hermetic. do not immerse units in any liquid. * s n o i t a c i f i c e p s l a r e n e g s l e d o m l l as t i n u ) 2 1 ( n o i t c n u f f f o / n o l e v e l c i g o l n o n e p o n i p e v a e l r o n i m5 . 4c d v l e v e l c i g o l f f ox a m2 . 1c d v e c n a t s i s e r t u p n ip y t2 s m h o k , t n e r r u c e l d i r e t r e v n o c w o l n i p f f o / n o p y t5 2a m n o i t a l o s i e g a t l o v n o i t a l o s i t u p t u o r e h t i e o t t u p n i t u p t u o l a u d o t e l g n i s e s a c - t u p n i e s a c o t t u p t u o r e h t i e e g a k a e l a 0 1 n i m n i m n i m n i m 4 4 5 1 0 0 7 0 5 2 4 4 5 1 c d v e c n a t i c a p a c t u p t u o o t t u p n i t u p t u o e l g n i s o t t u p n i t u p t u o l a u d o t t u p n i t u p t u o l a u d o t e l g n i s p y t p y t p y t 0 0 1 0 5 1 5 7 f p l a t n e m n o r i v n e e g n a r g n i t a r e p o e s a c g n i t a r e d o n n i m x a m 5 2 - 0 8 c ) 3 1 ( e g n a r l a n o i t n u f e s a c n i m x a m 0 4 - 0 9 c e g n a r e g a r o t s n i m x a m 0 4 - 0 0 1 c ) 4 1 ( e c n a d e p m i l a m r e h t n o i s r e v t n u o m n i p ) k n i s t a e h ( s h - n o i t p o s i s s a h c ( m c - n o i t p o ) t n u o m p y t p y t 7 . 2 8 . 1 ) 4 1 ( t t a w / c n w o d t u h s l a m r e h t e r u t a r e p m e t e s a c p y t0 9c l a r e n e g t h g i e w t i n u4 1. z o s t i k g n i t n u o ms n o i t p o e s a c e e s n i pn o i t c n u fn i pn o i t c n u f 1n i p o n8 e s n e s n m c v 5 + 2t u p n i - 9n m c v 5 + 3t u p n i - 0 1 t u p t u o v 5 + 4t u p n i + 1 1e s n e s v 5 + 5t u p n i + 2 1t u p t u o l a u d - 6f f o / n o 3 1n m c l a u d 7e s a c 4 1t u p t u o l a u d +

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concord, california 94520 ph: 925/687-4411 or 800/542-3355 fax: 925/687-3333 www.calex.com email: sales@ca lex.com 4 dual output the dual outputs are cross regulated to each other but independent of the loading on the single output. the dual output uses a cross regulation scheme where the plus and minus output voltage is regulated as an average voltage. this allows improved regulation on both outputs. if the outputs are loaded equally and the regulation is checked, then the apparent regulation is much closer to 0.5%. this data shows the worst case result of changing each output independently. the output common on the dual section is electrically isolated from the +5 volt section to aid in proper system grounding. if 24 volts or 30 volts are required, then the appropriate output can be connected to the system ground and the output current can be taken from the other output. in this situation the dual section ? s common pin (pin 13) should be left unconnected. full output power (30 watts) is available in this configuration. figure 3 shows the dual output connections. figure 3. the dual outputs can also be used with substantial unbalance and as single-ended outputs by leaving pin 13 unconnected. mounting guidelines the 55 watt triple series can be supplied in either a pin mount version or a chassis mount (screw terminal) version. it is suggested that when using the pin mount version, the 4-40 hold down screws provided in the bottom of the case be used to secure the unit to the pcb. these screws should be tightened before soldering to avoid solder joint stress. the chassis mount version can be mounted on its back with the four 4-40 hold down screws provided. the mounting surface should be flat to within 0.01 inches to prevent warping the case. the mounting can then serve as additional heat sinking. for optimum heat sinking, silicone grease is recommended over the so called ? dry pads. ? additional heat sinking will lower internal temperatures and increase the expected life. when chassis mounting remember that the case is connected to the - input pins through 1.5 megohms in parallel with 0.01f. the breakthrough voltage of this connection is greater than 250vdc. the ? -hs ? heat sink option lowers the thermal resistance from 2.7 to 1.8 c/watt dissipated. it also increases the heat removing efficiency of any cooling air flow. if the 55 watt triple is to be placed in a small enclosure where the power delivered to the load or the power dissipated in the 55 watt triple converter can raise the ambient temperature then care must be taken to insure that the case temperature does not exceed the 80 c limit for proper operation.

application guidelines inputs the input should be fused as per note number 3. the case is connected to the -input pins through 1.5 megohms in parallel with 0.01f. the case may be left floating in most applications. the noise performance of the converter may improve or degrade with the case connected to other inputs or outputs depending on your system grounding. the remote on/off pin may be left floating if it is not used. see ? understanding the remote on/off function ? application note for more information on this feature. the dual input pins (2,3 and 4,5) should be paralleled to share the input current. figure 1 shows the recommended input connections. figure 1. parallel both + and -input pins. fusing the input is recommended. single output the single output is independent of the loading on the dual output section. the single output also features provisions for remote sense connections. these allow the power supply to correct for line drops of up to 0.3 volts per leg or 0.6 volts total. the remote sense connections should be made with twisted pair wire or closely coupled pcb traces. there is approximately 2ma of current flowing in the remote sense lines. if the remote sense is not to be used, these pins must be connected to their respective output pins for proper output voltage accuracy and regulation. see ? applying the remote sense and trim functions on dc/dc converters ? application note for more information. the output common on the single section is electrically isolated from the dual section to aid in proper system grounding. figure 2 shows the single output connections with remote sense. figure 2. the remote sense pins must be connected to their respective outputs. if the remote sense feature is not used, connect the sense pins to their outputs directly at the converter.

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concord, california 94520 ph: 925/687-4411 or 800/542-3355 fax: 925/687-3333 www.calex.com email: sales@ca lex.com 5 typical performance (tc=25 c, vin=48 vdc, rated load). 10 20 30 40 50 60 70 80 90 100 load (%) 70 72 74 76 78 80 82 84 86 efficiency (%) 12t5.xxk efficiency vs. load line = line = line = 12vdc 9vdc 18vdc 9 101112131415161718 line input (volts) 78 79 80 81 82 83 84 85 efficiency (%) 12t5.xxk efficiency vs. line input 50% full load 100% full load 6 8 10 12 14 16 18 line input (volts) 0 1 2 3 4 5 6 7 8 9 input current (amps) 12t5.xxk input current vs. line input voltage 100% full load 50% full load 10 20 30 40 50 60 70 80 90 100 load (%) 65 70 75 80 85 90 efficiency (%) 24t5.xxk efficiency vs. load line = 18vdc line = line = 36vdc 24vdc 18 20 22 24 26 28 30 32 34 36 line input (volts) 83 84 85 86 87 efficiency (%) 24t5.xxk efficiency vs. line input 50% full load 100% full load 5 10152025303540 line input (volts) 0.0 1.0 2.0 3.0 4.0 input current (amps) 24t5.xxk input current vs. line input voltage 100% full load 50% full load

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concord, california 94520 ph: 925/687-4411 or 800/542-3355 fax: 925/687-3333 www.calex.com email: sales@ca lex.com 6 typical performance (tc=25 c, vin=48 vdc, rated load). 10 20 30 40 50 60 70 80 90 100 load (%) 60 65 70 75 80 85 90 efficiency (%) 48t5.xxk efficiency vs. load line = line = line = 48vdc 36vdc 72vdc 35 40 45 50 55 60 65 70 75 line input (volts) 81 82 83 84 85 86 87 88 efficiency (%) 48t5.xxk efficiency vs. line input 50% full load 100% full load 0 1020304050607080 line input (volts) 0.0 0.5 1.0 1.5 2.0 2.5 input current (amps) 48t5.xxk input current vs. line input voltage 100% full load 50% full load 0 20 40 60 80 100 120 140 output load (%) 0 20 40 60 80 100 120 output voltage (%) 5 volt output voltage vs. output load 0 50 100 150 200 250 300 350 output load (%) 0 20 40 60 80 100 120 output voltage (%) dual output voltage vs. output load frequency (hz) .001 .01 .1 1 impedance (ohms) output impedance vs. frequency 5v output +/-dual output 10 100 1k 10k 100k 1m

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concord, california 94520 ph: 925/687-4411 or 800/542-3355 fax: 925/687-3333 www.calex.com email: sales@ca lex.com 7 typical performance (tc=25 c, vin=48 vdc, rated load). -30 -20 -10 0 10 20 30 40 50 60 70 80 case temperature (deg c) -0.35 -0.30 -0.25 -0.20 -0.15 -0.10 -0.05 -0.00 0.05 0.10 0.15 normalized output (%) 5 volt output vs case temperature +5v output -30 -20 -10 0 10 20 30 40 50 60 70 80 case temperature (deg c) -0.35 -0.30 -0.25 -0.20 -0.15 -0.10 -0.05 -0.00 0.05 0.10 0.15 normalized output (%) dual output voltage vs case temperature plus output minus output -40 -20 0 20 40 60 80 100 ambient temperature (deg c) 0 20 40 60 80 100 120 output power (%) derating no heat sink infinite heat sink safe operating area

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