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A3938 Key Features

  • Drives a wide range of N-channel MOSFETs
  • Low-side synchronous rectification
  • Power MOSFET protection
  • Adjustable dead time for cross-conduction protection
  • Selectable coast or dynamic brake on power-down or
  • Fast/slow current decay modes
  • Internal PWM current control
  • Motor lead short-to-ground protection
  • Internal 5 V regulator
  • Fault diagnostic output

Related Allegro MicroSystems Datasheets

Part Number Description
A3930 Automotive 3-Phase BLDC Controller and MOSFET Driver
A3931 Automotive 3-Phase BLDC Controller and MOSFET Driver
A3932 Three-Phase Power MOSFET Controller
A3933 THREE-PHASE POWER MOSFET CONTROLLER
A3904 Low Voltage Voice Coil Motor Driver

A3938 Description

The A3938 is a three-phase, brushless DC motor controller. It has a high-current gate drive capability that allows driving of a wide range of power MOSFETs and can support motor supply voltages to 50 V. The A3938 integrates a bootstrapped high-side driver to minimize the external ponent count required to drive N-channel MOSFET drivers.