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A2550 Datasheet Relay Driver

Manufacturer: Allegro MicroSystems

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General Description

Large numbers of relay-based applications require the use of a microprocessor which implements complex system control.

In these systems, there is the need for microprocessor logic supply voltage, power-on reset circuitry, and watchdog capabilities.

The Allegro™ A2550 combines the functions of voltage regulator, watchdog, and reset, as well as three low-side DMOS relay driver outputs.

Overview

A2550 Relay Driver with 5 V Regulator for Automotive Applications.

Key Features

  • Three independent low-side DMOS output drivers.
  • Short-circuit protection of drivers.
  • Eliminates need for flyback diodes on relays.
  • Thermal shutdown.
  • Separate precision 5 V regulator (2%).
  • Current clamp on 5 V regulator.
  • 16-pin TSSOP package with exposed thermal pad.
  • Programmable reset (NPOR) delay time.
  • Programmable watchdog.
  • Automotive voltage and temperature ranges.
  • Active clamps for automotive load dump specifications.
  • Lead (Pb) fre.

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