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A4931

Allegro MicroSystems
Part Number A4931
Manufacturer Allegro MicroSystems
Description 3-Phase Brushless DC Motor Pre-Driver
Published Feb 26, 2019
Detailed Description A4931 3-Phase Brushless DC Motor Pre-Driver Features and Benefits ▪ Drives 6 N-channel MOSFETs ▪ Synchronous rectificat...
Datasheet PDF File A4931 PDF File

A4931
A4931

Overview
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) Approximate Scale 1:1 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°.
Other features include fixed off-time pulse width modulation (PWM) current control for limiting inrush current, locked-rotor protection with adjustable delay, thermal shutdown, overvoltage monitor, and synchronous rectification.
Internal synchronous rectification reduces power dissipation by turning o...


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