SEP 12, 2003 revised to OCT 26, 2006

Page 1 of 8

www.power-one.com

QLS25 DC-DC Series Data Sheet

25A Quarter-Brick

Applications

• Distributed power architectures

• Telecommunications equipment

• LAN/WAN applications

• Data processing applications

Features

•

RoHS lead solder exemption compliant

•

Cost-effective single board design

•

Low profile – 11 mm height

•

Input/output isolation: 1500VDC, basic

insulation

•

High efficiency - up to 90% at full load

•

Start-up into high capacitive load

•

Low conducted and radiated EMI

•

Output overcurrent protection

•

Output overvoltage protection

•

Back drive protection

•

Overtemperature protection

•

Remote sense

•

Set point accuracy

± 1%

•

Remote on/off (primary referenced), positive

or negative logic

•

Output voltage trim adjust, positive or

negative

•

UL 1950 Recognition, CSA 22.2 No. 950-95

certification, TUV IEC950

Description

The QLS25 is a new series of cost-effective, high-density single output DC-DC converters providing onboard

conversion of standard telecom and datacom input voltages into isolated low voltage outputs in a through-hole

mounting package. High efficiencies and a patent-pending board design significantly improve thermal

characteristics by evening out hot spots and enhance product reliability.

Model Selection

Model

Input

Voltage

VDC

Input

Current, Max

ADC

Output

Voltage

Vout,

VDC

Output Rated

Current

ADC

Output

Ripple/Noise,

mV p-p

Typical

Efficiency @

QLS20ZG

36-75

4.8

5.0

20

150

90

QLS25ZE

36-75

3.3

3.3

25

100

89

QLS25ZD

36-75

2.5

2.5

25

100

87

This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment

should be followed.