Multifunctional Ignition and Injector Driver

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Block Diagram

NXP MC33812 Low Side Switch Block Diagram

NXP MC33812 Low Side Switch Block Diagram


Key Features

  • Designed to operate over the range of ~4.7 V ≤ VPWR ≤ 36 V
  • Fuel Injector driver - Current Limit - 4.0 A Typical
  • Ignition pre-driver can drive IGBT or Darlington bipolar junction transistors
  • Ignition pre-driver has independent high and low side outputs
  • Relay driver - Current Limit - 4.0 A Typical
  • Lamp driver- Current Limit - 1.5 A Typical
  • All external outputs protected against short to battery, over-current
  • Ignition and other drivers protected against over-temperature
  • Interfaces directly to MCU using 5.0 V parallel interface
  • VCC voltage pre-regulator provides +5.0 V power for the MCU
  • MCU Power On RESET generator
  • MCU watchdog timer circuit with parallel refresh/time setting line
  • Independent fault annunciation outputs for ignition and injection
  • ISO-9141 K-Line transceiver for communicating diagnostic messages

Product Longevity Program

  • This product is included in the NXP Product Longevity Program ensuring a stable supply of products for your embedded designs. The MC33812 is included in the 15-year program

Part numbers include: MC33812EK.


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1 software file

Note: For better experience, software downloads are recommended on desktop.

Engineering Services

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