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A3938

Allegro MicroSystems
Part Number A3938
Manufacturer Allegro MicroSystems
Description Three-Phase Power MOSFET Controller
Published Feb 23, 2015
Detailed Description A3938 Three-Phase Power MOSFET Controller FEATURES AND BENEFITS ▪ Drives a wide range of N-channel MOSFETs ▪ Low-side s...
Datasheet PDF File A3938 PDF File

A3938
A3938

Overview
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.
The A3938 integrates a bootstrapped high-side driver to minimize the external component count required to drive N-channel MOSFET drivers.
Internal fixed off-time, PWM current-control circuitry can be used to regulate the maximum load current to a ...


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