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A3924 Datasheet Automotive Full-Bridge MOSFET Driver

Manufacturer: Allegro MicroSystems

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General Description

The A3924 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.

A unique charge pump regulator provides the programmable gate drive voltage for battery voltages down to 7 V and allows the A3924 to operate with a reduced gate drive, down to 5.5 V.Abootstrap capacitor is used to provide the above-battery supply voltage required for N-channel MOSFETs.

The full bridge can be controlled by independent logic level inputs or through the SPI-compatible serial interface.

Overview

A3924 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 logic supply.
  • Two integrated current sense amplifiers.
  • SPI-compatible serial interface.
  • Bridge control by direct logic inputs or serial interfa.

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