rev.

page

date

DESCRIPTION: DC/DC converter

2 of 3

08/2007

20050

phone

phone 503.612.2300 fax

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 µF tantalum and 1 µF 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 µS

ripple & noise

20MHz BW

100 mV p-p max.

temperature coefficient

±0.03%/°C max.

single/dual

±0.2% max.

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

switching frequency

250KHz, typ.

over temperature protection

120°C typ.

operating temp. range

-40°C to 85°C

storage temp.

-40°C to 125°C

dimensions

2.3x1.45x0.36 inches

(58.4x36.8x9.2mm)

weight

50 g