Allegro A2557KB

继电器，螺线管驱动器44.75V ~ 5.25V300mA

Overview

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.

FEATURES ■ 300 mA Output Current per Channel ■ Independent Over-Current Protection &Thermal Limiting for Each Driver ■ Output Voltage to 60 V ■ Output SOA Protection ■ Fault-Detection Circuitry for Open or Shorted Load ■ Low Quiescent Current Sleep Mode ■ Integral Output Flyback/Clamp Diodes ■ TTL- and 5 V CMOS-Compatible Inputs

Features

Bulk Package
Supplied from 5V

Through Hole Mounting Type

Applications

There are a lot of Allegro MicroSystems
A2557KB Power Switches ICs applications.

• Smartphone and PDA
• Portable GPS Device
• Set-top-box
• USB Power Distribution
• Notebook PC
• Telecom and Network Systems
• PC Card Hot Swap
• Storage Drives
• Portable/Handheld Devices
• Wireless/Networking Cards