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A5957 Datasheet Full-Bridge PWM Gate Driver

Manufacturer: Allegro MicroSystems

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General Description

Designed for pulse-width-modulated (PWM) control of DC motors, the A5957 is capable of 50 V operation and provides gate drive for an all N-channel external MOSFET bridge.

Input terminals are provided for use in controlling the speed and direction of a DC motor with externally applied PWM control signals.

Internal synchronous rectification control circuitry is provided to lower power dissipation during PWM operation.

Key Features

  • PHASE/ENABLE/SLEEPn control logic.
  • Overcurrent indication.
  • Adjustable off-time and blank-time.
  • Adjustable current limit.
  • Adjustable gate drive.
  • Synchronous rectification.
  • Internal UVLO.
  • Crossover-current protection.
  • MOSFET VDS protection.
  • Voltage output proportional to load current.

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