3-Phase Field Effect Transistor Pre-Driver

MC33937

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The NXP® MC33937A is a Field Effect Transistor (FET) pre-driver designed for three phase motor control and similar applications.

  • The integrated circuit (IC) uses SMARTMOS® technology
  • The IC contains three High Side FET pre-drivers and three Low Side FET pre-drivers
  • Three external bootstrap capacitors provide gate charge to the High Side FETs
  • The IC interfaces to a MCU via six direct input control signals, an SPI port for device setup and asynchronous reset, enable and interrupt signals
  • Both 5.0 and 3.0 V logic level inputs are accepted and 5.0 V logic level outputs are provided
  • Processor Expert® component for MC33937 enables rapid embedded application development

Block Diagram

MC34937 Power Actuation

MC34937 Power Actuation Block Diagram
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Features

Key Features

  • Fully specified from 8.0 to 40 V covers 12 and 24 V automotive systems
  • Extended operating range from 6.0 to 58 V covers 12 and 42 V systems
  • Greater than 1.0 A gate drive capability with protection
  • Protection against reverse charge injection from CGD and CGS of external FETs
  • Includes a charge pump to support full FET drive at low battery voltages
  • Deadtime is programmable via the SPI port
  • Load current(IL) 1 A (Typ)
  • 6 channels
  • Drain-to-source on resistance 5500 mOhm RDS(ON) (Typ)
  • Parallel and SPI Interface and Input Controllers

Product Longevity Program

  • This product is included in the NXP Product Longevity Program ensuring a stable supply of products for your embedded designs. The MC33937 is included in the 15-year program

Part numbers include: MC33937APEK, MCZ33937AEK.

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