Technical Reference Notes

ALQ25 Series

(Open Frame Single Output Quarter Brick)

MODEL: ALQ25 SERIES

SHEET 1 OF 15

Dec 1, 2003 - REVISION B

ALQ25 Single Output Open-Frame DC-DC Converter Module

Industry Standard ¼ Brick: 36V-75V Input / 5V Output

The ALQ25 series is Astec's next generation single output, high-density standard quarter brick offering. It operates from a 36V

to 75V DC Bus and comes in different Isolated Logic Output voltages (ILO) well suited for DPA applications. It’s designed to

conservatively handle 25A of output current for 5V and at high levels of efficiency (5V @ 91%). It provides tight regulation

and exhibits clean and monotonic output start up characteristics. The ALQ25’s come with industry standard features such as

Input UVLO, OCP, OVP, OTP, Output Trim, differential output Sense pins.

Special Features

•

Industry Standard ¼ Brick Footprint

•

Positive and Negative Enable Options

•

Regulation to Zero Load

•

High Capacitive Load Start-up

•

Fixed Switching Frequency at 200kHz

•

Output Trim

•

Input Under-Voltage Lockout

•

Low profile / open-frame

Environmental Specifications

•

-40ºC to 85ºC Operating Temperature

(200LFM)

•

-40ºC to 120ºC Storage Temperature

•

MTBF > 1 million hours

Electrical Parameters

Input

Input Range

36-75 VDC

Input Surge

100V / 100ms

Efficiency

91% (Typ)

Control

Enable

TTL compatible

(Positive and Negative Enable Options)

Output

Load Current

5.0V @ 25A max

Line Regulation

0.2 % Vo

Load Regulation

Ripple and Noise

Output Voltage

Adjust Range

Transient Response

50% to 75% Load Change

400

µ

µsec settling time (Typ)

Remote Sense

Over Current

Protection

Safety

UL + cUL 60950, Recognized (Pending)

EN60950 through TUV-PS (Pending)