A2557 Datasheet PDF - Allegro MicroSystems PROTECTED QUAD LOW-SIDE DRIVER WITH FAULT DETECTION & SLEEP MODE Specs

A2557 - PROTECTED QUAD LOW-SIDE DRIVER WITH FAULT DETECTION & SLEEP MODE

Datasheet Summary

Description

The A2557 low-current quad power drivers provide the same protected output driver function as (and are pin compatible with) the UDx2543/49/59 devices, combined with a fault diagnostic scheme similar to the UDx2547, plus an automatic low-current Sleep-Mode function.

Features

I 300 mA Output Current per Channel I Independent Over-Current Protection &Thermal Limiting for Each Driver I Output Voltage to 60 V I Output SOA Protection I Fault-Detection Circuitry for Open or Shorted Load I Low Quiescent Current Sleep Mode I Integral Output Flyback/Clamp Diodes I TTL- and 5 V CMOS-Compatible Inputs Complete part number includes a suffix to identify operating temperature range (E-, K-, or S-) and package type (-B, -EB, or -LB). Always order by complete part number, e. g. , A25.

Datasheet Details

Part number	A2557
Manufacturer	Allegro MicroSystems
File Size	176.69 KB
Description	PROTECTED QUAD LOW-SIDE DRIVER WITH FAULT DETECTION & SLEEP MODE
Datasheet	A2557 Datasheet
Additional preview pages of the A2557 datasheet.

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Full PDF Text Transcription

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2557 A2557xLB OUT1 K OUT2 GROUND GROUND OUT3 FAULT OUT4 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 IN 1 IN2 ENABLE GROUND GROUND V CC IN 3 IN 4 PROTECTED QUAD LOW-SIDE DRIVER WITH FAULT DETECTION & SLEEP MODE The A2557xB, A2557xEB, and A2557xLB have been specifically designed to provide cost-effective solutions to relay-driving applications with up to 300 mA drive current per channel. They may also be used for driving incandescent lamps in applications where turn-on time is not a concern. Each of the four outputs will sink 300 mA in the on state. The outputs have a minimum breakdown voltage of 60 V and a sustaining voltage of 40 V. A low-power Sleep Mode is activated with either ENABLE low or all inputs low. In this mode, the supply current drops to below 100 µA.

Published: Mar 23, 2005 |