Document Number: MC33812 NXP Semiconductors Rev. 6.0, 4/2016 Data sheet: Technical Data Multifunctional Ignition and Injector 33812 Driver 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 SMALL ENGINE CONTROL IC 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 V 36 V PWR EK Pb-FREE SUFFIX 98ASA10556D Fuel injector driver - Current Limit - 4.0 A typical 32 Pin SOICW EP Ignition pre-driver can drive IGBT or Darlington bipolar junction transistors Ignition pre-driver has independent high and low-side outputs Applications: Relay driver - current limit - 4.0 A typical Single cylinder engine control Lamp driver- current limit - 1.5 A typical Dual cylinder engine control 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 33812 V V BAT BAT VPWR MIL LAMPOUT PNP V +5 V BAT RELAY OR VCCREF OTHER LOAD ROUT VCC VCCSENS INJECTOR V GPIO BAT LAMPIN V BAT GPIO INJOUT RIN +5 V V RESET RESET IGNSUP PWR GPIO WDRFSH IGNFB GPIO INJIN MCU IGNOUTH GPIO INJFLT GPIO IGNIN (IGBT DRIVER SHOWN) IGNOUTL IGNFLT GPIO RELFLT GPIO RXD MRX TXD MTX TM EN, TEST2 ISO9141 ISO9141 WD INH PGND1,2 DGND Note: Surge Voltage protection recommended on VPWR Figure 1. Simplified application diagram 2016 NXP B.V.33812 V V BAT BAT MIL VPWR LAMPOUT PNP V +5 V BAT RELAY OR VCCREF OTHER LOAD ROUT VCC VCCSENS INJECTOR V GPIO LAMPIN BAT V BAT GPIO INJOUT RIN +5 V RESET +5 V RESET IGNSUP GPIO WDRFSH IGNFB INJIN GPIO MCU IGNOUTH GPIO INJFLT (DARLINGTON DRIVER SHOWN) GPIO IGNIN IGNOUTL IGNFLT GPIO RELFLT GPIO MRX RXD TXD MTX TM EN, TEST2 ISO9141 ISO9141 WD INH PGND1,2 DGND Figure 2. Simplified application diagram (Darlington mode) 33812 2 NXP Semiconductors