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A4940 - Automotive Full Bridge MOSFET Driver

Description

The A4940 is a full-bridge controller for use with external N-channel power MOSFETs and is specifically designed for automotive 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.
  • 5.5 to 50 V supply voltage range.
  • Diagnostics output.
  • Low current sleep mode.

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Datasheet preview – A4940

Datasheet Details

Part number A4940
Manufacturer Allegro Micro Systems
File Size 906.47 KB
Description Automotive Full Bridge MOSFET Driver
Datasheet download datasheet A4940 Datasheet
Additional preview pages of the A4940 datasheet.

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Full PDF Text Transcription

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A4940 Automotive 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 ▪ 5.5 to 50 V supply voltage range ▪ Diagnostics output ▪ Low current sleep mode PACKAGE: 24-pin TSSOP with exposed thermal pad (suffix LP) Not to scale DESCRIPTION The A4940 is a full-bridge controller for use with external N-channel power MOSFETs and is specifically designed for automotive 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 A4940 to operate with a reduced gate drive, down to 5.
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