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A3931 Datasheet Automotive 3-Phase BLDC Controller and MOSFET Driver

Manufacturer: Allegro MicroSystems

Download the A3931 datasheet PDF. This datasheet also includes the A3930 variant, as both parts are published together in a single manufacturer document.

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Note: The manufacturer provides a single datasheet file (A3930_AllegroMicroSystems.pdf) that lists specifications for multiple related part numbers.

General Description

The A3930 and A3931 are three-phase brushless DC (BLDC) motor controllers for use with N-channel external power MOSFETs.

They incorporate much of the circuitry required to design a cost-effective three-phase motor drive system and have been specifically designed for automotive applications.

A key automotive requirement is functionality over a wide input supply range.

Overview

A3930 and A3931 Automotive 3-Phase BLDC Controller and MOSFET.

Key Features

  • High current three-phase gate drive for N-channel MOSFETs.
  • Synchronous rectification.
  • Cross-conduction protection.
  • Charge pump and top-off charge pump for 100% PWM.
  • Integrated commutation decoder logic.
  • Operation over 5.5 to 50 V supply voltage range.
  • Extensive diagnostics output.
  • Provides +5 V Hall sensor power.
  • Low-current sleep mode.

More Datasheets from Allegro MicroSystems

Part Number Description
A3930 Automotive 3-Phase BLDC Controller and MOSFET Driver
A3932 Three-Phase Power MOSFET Controller
A3933 THREE-PHASE POWER MOSFET CONTROLLER
A3938 Three-Phase Power MOSFET Controller
A3904 Low Voltage Voice Coil Motor Driver
A3906 Low Voltage Stepper and Single/Dual DC Motor Driver
A3908 Low Voltage DC Motor Driver
A3910 Dual Half Bridge Motor Driver
A3916 Dual DMOS Full-Bridge Motor Driver
A3918 Low Voltage DC Motor Driver