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QLS30

30A Quarter-Brick DC/DC Converter

Power-One Inc. 

QLS30 Series – 30A Quarter-Brick DC/DC Converter

48V Input

1.8V, 1.5V, 1.2V Output

Data Sheet

Features

Applications

• Distributed power architectures

• Telecommunications equipment

• LAN/WAN applications

• Data processing applications

• Cost-effective single board design

• Low profile – 11 mm height

• Input/output isolation: 1500VDC, basic

insulation

• High efficiency

• Output back-drive protection

• Start-up into high capacitive load

• Low conducted and radiated EMI

• Output overcurrent protection

• Output overvoltage 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 new QLS30 series of single-output DC/DC converters features single board, multi-layer construction

and an SMT design that is highly reliable due to the low component count and minimal manufacturing touch

time. The QLS30 series uses fewer components than any other equivalently rated single board converter.

The converters can deliver a maximum of 30 Amps with a typical efficiency of 85%. The QLS provides

superior thermal performance, with minimal derating. The QLS30ZB model converter can deliver 22.8

amperes at 1.8 volt output in ambient conditions of 65°C and 200 LFM. This full featured, low profile

converter offers input undervoltage lockout, overload, overvoltage and overtemperature protection. Interface

features include remote on/off, remote sense and output voltage trim.

Selection Chart

Model

Input

Input

Output Output rated

Output

Typical

voltage current,

voltage

current

Ripple/Noise, Efficiency

VDC

max

ADC

Vout,

VDC

I rated,

ADC

mV p-p

@ I rated, %

QLS30ZB

36-75

1.5

1.8

30

100

86

QLS30ZA

36-75

1.3

1.5

30

100

85

QLS30ZY

36-75

1.1

1.2

30

100

84

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

should be followed.

REV. 10/1

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