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 rev. page date 1 of 3
08/2007
PART NUMBER: VQB125 series
DESCRIPTION: DC/DC converter
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 efficiency 83% 85% 87% 88% 89% 89% 90% 91% 92%
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382
rev. page date 2 of 3
08/2007
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 CMOS or open collector TTL open circuit or logic high <12 VDC 36-75V 35 V 33 V LC type
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 S 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 switching frequency over temperature protection operating temp. range storage temp. dimensions weight 2.3x1.45x0.36 inches (58.4x36.8x9.2mm) 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 F tantalum and 1 F ceramic capacitor across output.
see table 2250VDC min. 10 7 Ohm min. 250KHz, typ. 120C typ. -40C to 85C -40C to 125C
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382
rev. page date 3 of 3
08/2007
PART NUMBER: VQB125 series
DESCRIPTION: DC/DC converter
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
3 1.45 (36.8) 0.600 (15.24) 2 4 5 6 7 8 0.300 (7.62) 0.600 (15.24)
Pin 1 2 3 4 5 6 7
Function +Vin ON/OFF -Vin -Vout -SENSE Trim +SENSE +Vout
1
BOTTOM VIEW
SIDE VIEW
0.106 (2.70)
0.36 (9.2)
8
0.145 (3.68) 0.040 (1.02) 0.062 (1.57)
All Speci fication s Typical At Nominal Line , Full Load and 25 C Unle ss O the rwi se Noted .
DERATING CURVE
35 30
Output Current (A)
25 20 15 10 5 25 30 35 40 45 50 55 60 65 70 75 80 20LFM 100LFM 200LFM 300LFM
Ambient Temperature( C)
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2382


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