SEP 12, 2003 revised to OCT 26, 2006

Page 2 of 8

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QLS25 DC-DC Series Data Sheet

25A Quarter-Brick

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely effect long-

term reliability, and cause permanent damage to the converter.

Parameter

Conditions/Description

Min

Max

Units

Input voltage

Continuous

Transient, 100ms

75

100

VDC

VDC

Operating Temperature

PC Board Temperature

-40

100

°C

Storage Temperature

-40

125

°C

ON/OFF Control Voltage

Referenced to -Vin

50

VDC

Environmental and Mechanical Specifications

All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.

Parameter

Conditions/Description

Min

Nom

Max

Units

Shock

Halfsine wave, 3 axes

50

g

Sinusoidal Vibration

GR-63-Core, Section 5.4.2

1

g

Weight

1.2/35

Oz/g

Water Washing

Standard process

Yes

MTBF

Per Bellcore TR-NWT-000332

1,980

kHrs

Isolation Specifications

All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.

Parameter

Conditions/Description

Min

Nom

Max

Units

Insulation Safety Rating

Basic

Isolation Voltage

1500

VDC

Isolation Resistance

10

MOhm

Isolation Capacitance

1100

pF

Input Specifications

All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.

Parameter

Conditions/Description

Min

Nom

Max

Units

Input Voltage

Continuous

36

48

75

VDC

Turn-On Input Voltage

Ramping Up

33

VDC

Turn-Off Input Voltage

Ramping Down

32

VDC

Turn-On Time

To Output Regulation Band

100% Resistive Load

5

10

mS

Input Reflected Ripple Current

Full Load, 12µH source inductance

60

mA p-p

Inrush Transient

Vin=Vin.max

0.1

A