v-infinity, llc, 9615 sw allen blvd suite 103, beaverton, or 97005 www.v-infinity.com 1-866-372-1258 ? VQB75- single output brick dc-dc converter input input voltage range 24v 18-36v 48v 36-75v under voltage lockout 24 vin power up 17v power down 15.5v 48vin power up 34v power down 32.5v positive logic remote on/off (see note 4&5) input filter pi type output voltage accuracy 1% max. transient response: 75%-100% step load change error band 5% recover time <500us external trim adj. range 10% ripple & noise 20mhz bw, 2.5v, 3.3v, 5v 40mv rms., max 100mv pk-pk., max temperature coefficient 0.03%/c short circuit protection continuous line regulation 1 0.2% max load regulation 2 0.2% max over voltage protection trip range, % vo nom. 115-140% current limit 110-140% nominal output general specifications efficiency see table isolation voltage input/output 1500vdc min. input/case 1500vdc min. output/case 1500vdc min. isolation resistance 10 7 ohm min. switching frequency 300khz, type operating case temperature -40c to +100c storage temperature -40c to +105c thermal shutdown, case temp. 100c typ. dimensions 1.45x2.28x0.50 inches (36.8x57.9x12.7mm) case material aluminum baseplate with plastic case features 50-75w isolated output efficiency to 90% 300khz switching frequency 2:1 input range regulated outputs continuous short circuit protection industry standard half-brick package open frame type option
v-infinity, llc, 9615 sw allen blvd suite 103, beaverton, or 97005 www.v-infinity.com 1-866-372-1258 ? VQB75- single output brick dc-dc converter model input output output i nput current number voltage voltage current no load full load effic. case VQB75-d24-s1-r8 18-36vdc 1.8vdc 0.5-25a 60ma 2259ma 83% qb VQB75-d24-s2r5 18-36vdc 2.5vdc 0.5-25a 60ma 3064ma 85% qb VQB75-d24-s3r3 18-36vdc 3.3vdc 0.5-20a 70ma 3125ma 88% qb VQB75-d24-s5 18-36vdc 5vdc 0.5-15a 80ma 3472ma 90% qb VQB75-d48-s1r8 36-75vdc 1.8vdc 0.5-25a 50ma 1116ma 84% qb VQB75-d48-s2r5 36-75vdc 2.5vdc 0.5-25a 50ma 1514ma 86% qb VQB75-d48-s3r3 36-75vdc 3.3vdc 0.5-20a 50ma 1563ma 88% qb notes: 1. measured from high line to low line 2. measured from full load to zero load 3. logic compatibility...open collector ref to -input module on...open circuit module off...<0.8vdc 4. suffix ?o? to the model number with open frame type case hb pin connection pin function 1. 2. 3. 4. 5. 6. 7. 8. vin on/off case -vout -sense trim +sense +vout
v-infinity, llc, 9615 sw allen blvd suite 103, beaverton, or 97005 www.v-infinity.com 1-866-372-1258 ? VQB75- single output brick dc-dc converter application notes derating: the operating case temperature range of the VQB75 series is -40c to +100c. when operating the VQB75, proper derating or cooling is needed. following is the derating curve of VQB75 without heat sink. where: the power dissapation (pd) is pd= pi - po = po (1- n )/ n the thermal resistances are listed below. the temperature rise ( d t): d t = pd * rca remote on/off control the VQB75 series allows the user to switch the module on and off electronically with the remote on/off feature. the VQB75 series is available with ?positive logic? or ?negative logic? options.
v-infinity, llc, 9615 sw allen blvd suite 103, beaverton, or 97005 www.v-infinity.com 1-866-372-1258 ? VQB75- single output brick dc-dc converter external output trimming output may optionally be externally trimmed (10%) with a fixed resistor or an external trimpot as shown. output noise the output noise is measured with a 10f tantalum capacitor and a 1.0f ceramic capacitor across the output.
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