Automotive Full-Bridge MOSFET Driver


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The A5929 is a full-bridge controller for use with N-channel external power MOSFETs and is specifically designed for automotive applications.

A unique charge pump regulator provides full (>10 V) gate drive at battery voltages down to 7 V and allows the A5929 to operate with reduced gate drive at battery voltages down to 5.5 V. A bootstrap capacitor is used to provide the above battery supply voltage required for n-channel MOSFETs.

One logic level input is provided for each of the four power MOSFETs in the full-bridge, allowing motors to be driven with any PWM scheme defined by an external controller. The power MOSFETs are protected from cross-conduction by integrated crossover control.

Motor phase short-to-supply and short-to-ground detection is provided by independent drain-source voltage monitors on each MOSFET. Short faults, supply undervoltage, and chip over-temperature conditions are indicated by a single open drain fault output.

The A5929 is supplied in a 24-pin TSSOP power package with an exposed thermal pad (package type LP). This package is available in lead (Pb) free versions, with 100% matte tin lead frame plating (suffix –T).

  • High current Full-Bridge gate drive for n-channel MOSFETs
  • Cross-conduction protection
  • 5.5 V to 50 V Supply Voltage Range
  • Motor phase short to supply and short to ground detection
  • Undervoltage, overtemperature monitors
  • Low Current Sleep Mode
24-pin eTSSOP with exposed thermal pad (suffix LP)

Part Number Specifications and Availability