for more information, please visit the product page. ????????? ?????????????????? cui .com date 07/15/2015 page 1 of 7 date page 1 of 7 features ? up to 50 w isolated output ? 2:1 input range (18~36 vdc, 36~75 vdc) ? smaller package ? single, regulated output ? 1,500 vdc isolation ? short circuit, over current, input under voltage protection ? inverse polarity protection ? remote on/off ? operating temperature range (-40~85c) ? six sided metal shielding ? efficiency up to 91% model input voltage output voltage output current output power ripple and noise 1 effciency typ (vdc) range (vdc) (vdc) min (ma) max (a) max (w) max (mvp-p) typ (%) pqa50-d24-s3-t 24 18~36 3.3 500 10 33 150 89 pqa50-d24-s5-t 24 18~36 5 500 10 50 150 91 PQA50-D24-S12-T 24 18~36 12 208 4.167 50 150 91 pqa50-d24-s15-t 24 18~36 15 167 3.333 50 150 91 pqa50-d24-s24-t 24 18~36 24 104 2.083 50 150 91 pqa50-d48-s3-t 48 36~75 3.3 500 10 33 150 89 pqa50-d48-s5-t 48 36~75 5 500 10 50 150 91 pqa50-d48-s12-t 48 36~75 12 208 4.167 50 150 91 pqa50-d48-s15-t 48 36~75 15 167 3.333 50 150 91 pqa50-d48-s24-t 48 36~75 24 104 2.083 50 150 91 notes: 1. ripple and noise are measured at 20 mhz bw by "parallel cable" method with 1 f ceramic and 10 f electrolytic capacitors on the output. part number key pqa50 - d xx - s xx - t x input voltage output voltage base number mounting type heatsink "blank" = no heatsink h = with heatsink t = chassis mount series : pqa50-t description: dc-dc converter
for more information, please visit the product page. ?????????????????? cui .com date 07/15/2015 page 2 of 7 input parameter conditions/description min typ max units operating input voltage 24 vdc input models 48 vdc input models 18 36 24 48 36 75 vdc vdc start-up voltage input under voltage protection 24 vdc input models 48 vdc input models 18 36 vdc vdc input over voltage protection 24 vdc input models 48 vdc input models 36 75 vdc vdc under/over voltage shutdown input under voltage protection 24 vdc input models 48 vdc input models 16 32 vdc vdc input over voltage protection 24 vdc input models 48 vdc input models 40 81 vdc vdc surge voltage for maximum of 1 second 24 vdc input models 48 vdc input models -0.7 -0.7 50 100 vdc vdc start-up time nominal input, constant load 10 ms ctrl 1 models on (ctrl open or connect ttl high level, 3~12 vdc) models off (ctrl connect gnd or low level, 0~1.2 vdc) input current (models off) 6 ma flter pi flter note 1. ctrl pin voltage is referenced to gnd. output parameter conditions/description min typ max units line regulation full load, input voltage from low to high 0.2 0.5 % load regulation 10% to 100% load 0.5 1 % voltage accuracy 1 3 % adjustability 10 % switching frequency pwm mode 320 khz transient recovery time 25% load step change 300 500 s transient response deviation 25% load step change 3 5 % temperature coeffcient 100% load 0.02 %/c protections parameter conditions/description min typ max units over voltage protection 2 3.3 vdc output models 5 vdc output models 12 vdc output models 15 vdc output models 24 vdc output models 3.9 6.2 15 18 30 vdc vdc vdc vdc vdc over current protection 135 % short circuit protection continuous, automatic recovery, hiccup over temperature protection 110 c note 2. module needs to be re-started after over voltage protection. cui inc series : pqa50-t description: dc-dc converter
for more information, please visit the product page. ?????????????????? cui .com date 07/15/2015 page 3 of 7 safety and compliance parameter conditions/description min typ max units isolation voltage input to output at 1 ma for 1 minute 1,500 vdc isolation resistance input to output at 500 vdc 1,000 m? isolation capacitance input to output at 100 khz, 0.1 vdc 2,000 pf conducted emissions cispr22/en55022 class b (external circuit required, see fgure 1) radiated emissions cispr22/en55022 class b (external circuit required, see fgure 1) esd iec/en61000-4-2 class b, contact 4kv radiated immunity iec/en61000-4-3 class a, 10v/m eft/burst iec/en61000-4-4 class b, 2kv (external circuit required, see fgure 1) surge iec/en61000-4-5 class b, 2kv (external circuit required, see fgure 1) conducted immunity iec/en61000-4-6 class a, 3 vr.m.s voltage dips & interruptions iec/en61000-4-29 class b, 0%-70% mtbf as per mil-hdbk-217f @ 25c 1,000,000 hours rohs 2011/65/eu environmental parameter conditions/description min typ max units operating temperature see derating curve -40 85 c storage temperature -55 125 c storage humidity non-condensing 5 95 % case temperature at full load, operating temperature curve range 105 c vibration 10~55 hz, 30 min. along x, y, and z 10 g mechanical parameter conditions/description min typ max units dimensions chassis mount: 76.0 x 31.5 x 21.2 chassis mount with heatsink: 76.0 x 31.5 x 25.1 mm mm case material aluminum alloy weight chassis mount chassis mount with heatsink 57 65 g g cui inc series : pqa50-t description: dc-dc converter
for more information, please visit the product page. ?????????????????? cui .com date 07/15/2015 page 4 of 7 pin connections pin function 1 ctrl 2 gnd 3 vin 4 trim 5 0v 6 +vo units: mm[inch] tolerance: 0.50[0.020] wire range: 24~12 awg to p view front view chassis mount with heatsink pin connections pin function 1 ctrl 2 gnd 3 vin 4 trim 5 0v 6 +vo units: mm[inch] tolerance: 0.50[0.020] wire range: 24~12 awg to p view front view chassis mount mechanical drawing cui inc series : pqa50-t description: dc-dc converter
for more information, please visit the product page. ?????????????????? cui .com date 07/15/2015 page 5 of 7 output voltage 5vdc recommended external circuit components vin (vdc) 24 48 c0 330f/50v 330f/100v cy1, cy2 1nf/2kv 1nf/2kv lcm 2.2mh 2.2mh emc recommended circuit derating curves 100 80 60 40 20 ambient t emper ature (c) load (% ) -40- 20 02 04 0 100 sa fe operating area 55 65 85 wi thout heatsink wi th heatsink 100 80 60 40 20 ambient t emper ature (c) load (% ) -40- 20 02 04 0 85 100 sa fe operating area 60 70 wi thout heatsink wi th heatsink output voltage > 5vdc figure 1 table 1 vi n gn d +v o 0v dc /d c lo ad lc m c0 cy vi n gn d cy 1 2 co ut test configuration dc ci n li n dc load os ci ll os co pe cu rr en t pr ob e li n( 4. 7 h) ci n( 22 0 f, es r< 1. 0 at 100k hz ) note: 1. input refected-ripple current is measured with an inductor lin and capacitor cin to simulate source impedance. external components lin 4.7h cin 220f, esr < 1.0? at 100 khz figure 2 table 2 note: 1. see table 3 for cout values. cui inc series : pqa50-t description: dc-dc converter
for more information, please visit the product page. ?????????????????? cui .com date 07/15/2015 page 6 of 7 1. requirement on output load to ensure this module can operate effciently and reliably, the minimum output load cannot be less than 5% of the full load during operation. if the actual output power is small, please connect a resistor at the output end in parallel to increase the load. 2. recommended circuit this series has been tested according to the following recommended testing circuit before leaving the factory. this series should be tested under load (see figure 3). if you want to further decrease the input/output ripple, you can increase capacitance properly or choose capacitors with low esr (see table 3). however, the capacitance must not exceed the maximum capacitive load or a start-up problem might arise (see table 4). 3. output voltage trimming leave open if not used. formula for trim resistor application circuit for trim pin (part in broken line is the interior of models) note: value for r1, r2, r3, and vref (see table 5) r t : trim resistor a: user-defned parameter, no actual meanings vo': the trim up/down voltage up : a= vr e f vo ?- vr ef r 1 r= a r 2 r- a 2 -r 3 do wn : a= vr e f vo ?- vr ef r 2 r= t t ar 1 r- a 1 -r 3 application notes figure 3 table 3 table 4 table 5 figure 4 vout (vdc) cin (f) cout (f) 3.3 100 220 5 100 220 12 100 100 15 100 100 24 100 47 notes: 1. minimum load shouldn't be less than 5%, otherwise ripple may increase dramatically. operation under minimum load will not damage the converter, however, they may not meet all specifcations listed. 2. maximum capacitive load is tested at input voltage range and full load. 3. all specifcations are measured at ta=25c, humidity<75%, nominal input voltage and rated output load unless otherwise specifed. +v o 0v r 2 r 1 r 3 v re f r t tr im 0v r 2 r 1 r 3 v re f r t tr im +v o tr im up tr im do wn dc dc vi n gn d +v out 0v cin vout (vdc) max. capacitive load (f) 3.3 27000 5 18900 12 3700 15 2000 24 1000 vout (vdc) r1 (k?) r2 (k?) r3 (k?) vref (v) 3.3 4.788 2.87 15 1.24 5 2.87 2.87 12.1 2.5 12 11 2.87 22 2.5 15 15 3 22 2.5 24 20 2.308 15 2.5 cui inc series : pqa50-t description: dc-dc converter
for more information, please visit the product page. ????????? date 07/15/2015 page 7 of 7 cui offers a two (2) year limited warranty. complete warranty information is listed on our website. cui reserves the right to make changes to the product at any time without notice. information provided by cui is believed to be accurate and reliable. however, no responsibility is assumed by cui for its use, nor for any infringements of patents or other rights of third parties which may result from its use. cui products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safet y or effectiveness. headquarters 20050 sw 112th ave. tualatin, or 97062 800.275.4899 fax 503.612.2383 cui .com techsupport@cui.com rev. description date 1.0 initial release 01/21/2014 1.01 updated datasheet 07/15/2015 the revision history provided is for informational purposes only and is believed to be accurate. revision history cui inc series : pqa50-t description: dc-dc converter
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