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A3944 Datasheet Automotive Low-Side FET Pre-Driver

Manufacturer: Allegro MicroSystems

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General Description

The A3944 is a programmable six-channel low-side MOSFET pre-driver suitable for use in automotive applications.

Each channel is controllable by a combination of parallel and serial inputs and provides sufficient gate drive current to allow PWM control up to 20 kHz, depending on the MOSFET gate charge.

Each channel provides independent fault diagnostics for shortto-ground and open load when in the off-state, and short-tobattery when in the on-state.

Overview

A3944 Automotive Low-Side FET Pre-Driver.

Key Features

  • 6 channels.
  • Drives logic-level N-channel MOSFETs.
  • 40 mA gate drive current.
  • Short and open detection.
  • High-voltage (50 V) drain feedback inputs.
  • Programmable fault timers and thresholds per channel.
  • UVLO and thermal warning circuitry.
  • Serial or parallel gate drive control.
  • Highly configurable, through SPI-compatible interface.
  • Compact TSSOP package.

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