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A3922 Datasheet Automotive Full-Bridge MOSFET Driver

Manufacturer: Allegro MicroSystems

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General Description

The A3922 is an N-channel power MOSFET driver capable of controlling MOSFETs connected in a full-bridge (H-bridge) arrangement and is specifically designed for automotive applications with high-power inductive loads, such as brush DC motors solenoids and actuators.

Aunique charge pump regulator provides a programmable gate drive voltage for battery voltages down to 7 V and allows the A3922 to operate with a reduced gate drive, down to 5.5 V.

A bootstrap capacitor is used to provide the above-battery supply voltage required for N-channel MOSFETs.

Overview

A3922 Automotive Full-Bridge MOSFET Driver.

Key Features

  • Full-bridge MOSFET driver.
  • Bootstrap gate drive for N-channel MOSFET bridge.
  • Cross-conduction protection with adjustable dead time.
  • Charge pump for low supply voltage operation.
  • Programmable gate drive voltage.
  • 5.5 to 50 V supply voltage operating range.
  • Integrated current sense amplifier.
  • SPI compatible serial interface.
  • Bridge control by direct logic inputs or serial interface.
  • TTL-compatible logic input.

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