rev. page 1 of 3 date 08/2007 DESCRIPTION: DC/DC converter PART NUMBER: VQB125 series features · 40-125 W isolated output ·efficiency to 92% ·fixed switching frequency ·monotonic start-up into prebiased load ·input under-voltage protection ·over-temperature protection ·over current protection ·remote ON/OFF ·industry standard quarter-brick package ·fully isolated 2250 VDC model number VQB125-D48-S1 VQB125-D48-S1R2 VQB125-D48-S1R5 VQB125-D48-S1R8 VQB125-D48-S2R5 VQB125-D48-S3R3 VQB125-D48-S5 VQB125-D48-S9 VQB125-D48-S12 input voltage 36-75 VDC 36-75 VDC 36-75 VDC 36-75 VDC 36-75 VDC 36-75 VDC 36-75 VDC 36-75 VDC 36-75 VDC output voltage 1.0 VDC 1.2 VDC 1.5 VDC 1.8 VDC 2.5 VDC 3.3 VDC 5 VDC 9 VDC 12 VDC output current 40 A 40 A 40 A 40 A 40 A 35 A 25 A 13 A 10 A input current no load 60 mA 60 mA 60 mA 60 mA 60 mA 60 mA 60 mA 60 mA 60 mA full load 1004 mA 1176 mA 1436 mA 1705 mA 2341 mA 2704 mA 2894 mA 2679 mA 2717 mA 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 efficiency 83% 85% 87% 88% 89% 89% 90% 91% 92% rev. PART NUMBER: VQB125 series DESCRIPTION: DC/DC converter INPUT input voltage range under voltage lockout input filter logic compatibility module ON module OFF 48V: 48 Vin power up 48 Vin power down 36-75V 35 V 33 V LC type CMOS or open collector TTL open circuit or logic high <12 VDC OUTPUT voltage accuracy transient response: ripple & noise temperature coefficient line regulation 1 load regulation 2 over-voltage protection output current limit short circuit protection external trim adj. 25% step load change 20MHz BW single/dual single/dual % nom. output continuous/hiccup ±1.0% max. <500 µS 100 mV p-p max. ±0.03%/°C max. ±0.2% max. ±0.5% max. 115-140% 110-140% ±10% GENERAL SPECIFICATIONS efficiency isolation voltage isolation resistance see table 2250VDC min. 10 7 Ohm min. switching frequency 250KHz, typ. over temperature protection 120°C typ. operating temp. range -40°C to 85°C storage temp. dimensions -40°C to 125°C 2.3x1.45x0.36 inches (58.4x36.8x9.2mm) weight 50 g 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 µF tantalum and 1 µF ceramic capacitor across output. 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382 page 2 of 3 date 08/2007 rev. page 3 of 3 date 08/2007 DESCRIPTION: DC/DC converter PART NUMBER: VQB125 series DIMENSIONS (mm) All Dimensions In Inches(mm) Tolerance .xx ±.02 (.x ±0.5) .xxx ±.010 (.xx ± 0.25) 2.30 (58.4) 2.000 (50.80) PIN CONNECTION 4 3 1.45 (36.8) 0.600 (15.24) Pin 5 2 6 7 1 0.300 (7.62) 0.600 (15.24) 8 BOTTOM VIEW 0.36 (9.2) SIDE VIEW 1 +Vin 2 ON/OFF 3 -Vin 4 -Vout 5 -SENSE 6 Trim 7 +SENSE 8 +Vout 0.106 (2.70) 0.145 (3.68) 0.040 (1.02) 0.062 (1.57) A ll S peci fication s T ypical A t N ominal L ine , F ull Load and 25 ˚C U nle ss O the rwi se N oted . DERATING CURVE 35 Output Current (A) 30 25 20 20LFM 100LFM 15 200LFM 10 300LFM 5 25 30 35 40 45 50 55 60 65 70 75 Function 80 Ambient Temperature( ˚C) 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382