The 33812 is an engine control analog power IC intended for motorcycle and other single/dual cylinder small engine control applications. The IC consists of three integrated low-side drivers, one pre-driver, a +5.0 V, voltage pre-regulator, an MCU watchdog circuit, an ISO 9141 K-Line interface, and a parallel interface for MCU communication. The three low-side drivers are provided for driving a fuel injector, a lamp or LED, and a relay or other load. The pre-driver is intended to drive either an Insulated Gate Bipolar Transistor (IGBT) or a bipolar Darlington transistor to control an ignition coil. This device is powered by SMARTMOS technology.

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, overcurrent

•Ignition and other drivers protected against overtemperature

•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, injector and relay drivers

•ISO-9141 K-Line transceiver for communicating diagnostic messages

Applications

•Single cylinder engine control

•Dual cylinder engine control