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A4957 - Full Bridge MOSFET Driver

Description

The A4957 is a full-bridge controller for use with external N-channel power MOSFETs and is specifically designed for applications with high-power inductive loads such as brush DC motors.

Features

  • High-current gate drive for N-channel MOSFET full bridge.
  • Independent control of each MOSFET.
  • Charge pump for low supply voltage operation.
  • Cross-conduction protection with adjustable dead time.
  • 4.5 to 50 V supply voltage range.
  • Diagnostics output.
  • Low current sleep mode.

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Datasheet Details

Part number A4957
Manufacturer Allegro
File Size 1.13 MB
Description Full Bridge MOSFET Driver
Datasheet download datasheet A4957 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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A4957 Full Bridge MOSFET Driver FEATURES AND BENEFITS ▪ High-current gate drive for N-channel MOSFET full bridge ▪ Independent control of each MOSFET ▪ Charge pump for low supply voltage operation ▪ Cross-conduction protection with adjustable dead time ▪ 4.5 to 50 V supply voltage range ▪ Diagnostics output ▪ Low current sleep mode PACKAGE: 24-contact QFN with exposed thermal pad (Suffix ES) Not to scale DESCRIPTION The A4957 is a full-bridge controller for use with external N-channel power MOSFETs and is specifically designed for applications with high-power inductive loads such as brush DC motors. A unique charge pump regulator provides full ( >10 V ) gate drive for battery voltages down to 7 V and allows the A4957 to operate with a reduced gate drive, down to 4.5 V.
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