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85V Three-Phase MOSFET Driver for High-Power BLDC Motor Control

A89120, A89121

Allegro EV 36 Pin QFN Package

The A89120/1 is a high-current, three-phase MOSFET driver optimized for BLDC motor control in demanding applications. It features a wide operating voltage range, adjustable gate drive, integrated current sensing, and robust protection features. The A89120 supports up to 58V, while the A89121 handles up to 85V.

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Top Features

Packaging

  • 5.5 V to 85 V supply voltage operating range (A89121)
  • 5.5 V to 58 V supply voltage operating range (A89120)
  • 3.3 V or 5 V low quiescent current (IQ; typically, 8.5 µA) low-dropout (LDO) regulator, active during sleep mode
  • Charge pump for low supply voltage operation
  • Cross-conduction protection with adjustable dead time
  • Bridge control by direct logic inputs for maximum flexibility
  • Low side current sense amplifier (1 us settling time) with adjustable gain & offset
  • VDS (FET short), Undervoltage lockout, and thermal shutdown diagnostic with fault output

36-contact QFN with exposed thermal pad (suffix EV)

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Part Number Specifications and Availability