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A4931 - 3-Phase Brushless DC Motor Pre-Driver

General Description

TheA4931 is a complete 3-phase brushless DC motor pre-driver.

The device is capable of driving a wide range of N-channel power MOSFETs and can support motor supply voltages up to 30 V.

Commutation logic is determined by three Hall-element inputs spaced at 120°.

Key Features

  • Drives 6 N-channel MOSFETs.
  • Synchronous rectification for low power dissipation.
  • Internal UVLO and thermal shutdown circuitry.
  • Hall element inputs.
  • PWM current limiting.
  • Dead time protection.
  • FG outputs.
  • Standby mode.
  • Lock detect protection.
  • Overvoltage protection.

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Other Datasheets by Allegro MicroSystems

Part Number Description
A4915 3-Phase MOSFET Driver
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A4950 Full-Bridge DMOS PWM Motor Driver
A4960 Sensorless BLDC Controller
A4970 Dual Full-Bridge PWM Motor Driver

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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A4931 3-Phase Brushless DC Motor Pre-Driver FEATURES AND BENEFITS ▪ Drives 6 N-channel MOSFETs ▪ Synchronous rectification for low power dissipation ▪ Internal UVLO and thermal shutdown circuitry ▪ Hall element inputs ▪ PWM current limiting ▪ Dead time protection ▪ FG outputs ▪ Standby mode ▪ Lock detect protection ▪ Overvoltage protection PACKAGE: 28-contact QFN (ET package) Not to scale DESCRIPTION TheA4931 is a complete 3-phase brushless DC motor pre-driver. The device is capable of driving a wide range of N-channel power MOSFETs and can support motor supply voltages up to 30 V. Commutation logic is determined by three Hall-element inputs spaced at 120°.