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A3938 - Three-Phase Power MOSFET Controller

Datasheet Summary

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.

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 RESET input.
  • Fast/slow current decay modes.
  • Internal PWM current control.
  • Motor lead short-to-ground protection.
  • Internal 5 V regulator.
  • Fault diagnostic output.
  • Thermal shutdown.
  • Undervoltage protection Package 38-pin TSSOP (suffi.

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Datasheet preview – A3938

Datasheet Details

Part number A3938
Manufacturer Allegro MicroSystems
File Size 663.75 KB
Description Three-Phase Power MOSFET Controller
Datasheet download datasheet A3938 Datasheet
Additional preview pages of the A3938 datasheet.

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Full PDF Text Transcription

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A3938 Three-Phase Power MOSFET Controller FEATURES AND BENEFITS ▪ 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 RESET input ▪ Fast/slow current decay modes ▪ Internal PWM current control ▪ Motor lead short-to-ground protection ▪ Internal 5 V regulator ▪ Fault diagnostic output ▪ Thermal shutdown ▪ Undervoltage protection Package 38-pin TSSOP (suffix LD): Not to scale 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.
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