rev. page date rev. page date description: dc/dc converter 1 of 3 08/2007 20050 sw 112 th ave. tualatin, oregon 97062 p h o n e phone 503.612.2300 f a x fax 503.612.2382 part number: VQB125 series features 40-125 w isolated output efficiency to 92% fixed switching frequency monotonic start-up into pre- biased load input under-voltage protection over-temperature protection over current protection remote on/off industry standard quarter-brick package fully isolated 2250 vdc model input output output input current number voltage voltage current no load full load efficiency VQB125-d48-s1 36-75 vdc 1.0 vdc 40 a 60 ma 1004 ma 83% VQB125-d48-s1r2 36-75 vdc 1.2 vdc 40 a 60 ma 1176 ma 85% VQB125-d48-s1r5 36-75 vdc 1.5 vdc 40 a 60 ma 1436 ma 87% VQB125-d48-s1r8 36-75 vdc 1.8 vdc 40 a 60 ma 1705 ma 88% VQB125-d48-s2r5 36-75 vdc 2.5 vdc 40 a 60 ma 2341 ma 89% VQB125-d48-s3r3 36-75 vdc 3.3 vdc 35 a 60 ma 2704 ma 89% VQB125-d48-s5 36-75 vdc 5 vdc 25 a 60 ma 2894 ma 90% VQB125-d48-s9 36-75 vdc 9 vdc 13 a 60 ma 2679 ma 91% VQB125-d48-s12 36-75 vdc 12 vdc 10 a 60 ma 2717 ma 92%
rev. page date description: dc/dc converter 2 of 3 08/2007 20050 sw 112 th ave. tualatin, oregon 97062 p h o n e phone 503.612.2300 f a x fax 503.612.2382 part number: VQB125 series notes: 1. measured from high line to low line 2. measured from full load to 1/4 load 3. suffix ?n? to the model number with negative logic remote on/off module on <1.2 vdc module off open circuit or logic high 4. output ripple and noise is measured with 10 f tantalum and 1 f ceramic capacitor across output. input input voltage range 48v: 36-75v under voltage lockout 48 vin power up 35 v 48 vin power down 33 v input filter lc type logic compatibility cmos or open collector ttl module on open circuit or logic high module off <12 vdc output voltage accuracy 1.0% max. transient response: 25% step load change <500 s ripple & noise 20mhz bw 100 mv p-p max. temperature coefficient 0.03%/c max. line regulation 1 single/dual 0.2% max. load regulation 2 single/dual 0.5% max. over-voltage protection 115-140% output current limit % nom. output 110-140% short circuit protection continuous/hiccup external trim adj. 10% general specifications efficiency see table isolation voltage 2250vdc min. isolation resistance 10 7 ohm min. switching frequency 250khz, typ. over temperature protection 120c typ. operating temp. range -40c to 85c storage temp. -40c to 125c dimensions 2.3x1.45x0.36 inches (58.4x36.8x9.2mm) weight 50 g
rev. page date description: dc/dc converter 3 of 3 08/2007 20050 sw 112 th ave. tualatin, oregon 97062 p h o n e phone 503.612.2300 f a x fax 503.612.2382 part number: VQB125 series dimensions (mm) 0.600 2.000 (7.62) (15.24) (50.80) (15.24) (58.4) (36.8) 1.45 bottom view 1 4 2 3 5 6 7 8 (9.2) (2.70) (1.57) (1.02) (3.68) side view 0.300 0.600 0.106 0.062 0.040 0.36 0.145 2.30 a ll s peci f ication s t ypical a t n ominal l ine , f ull l oad and 25 ?c u nle ss o the r wi s e n oted . all dimensions in inches(mm) tolerance .xx .02 (.x 0.5) .xxx .010 (.xx 0.25) pin connection pin function 1 2 3 4 5 6 7 8 +vin on/off -vin -vout -sense trim +sense +vout ambient temperature( ?c) output current (a) 5 10 15 20 25 30 35 25 30 35 40 45 50 55 60 65 70 75 80 20lfm 100lfm 200lfm 300lfm derating curve
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