Document Number: MC33812
Rev. 4.0, 7/2009
Freescale Semiconductor
Advance Information
Multifunctional Ignition and
Injector Driver
33812
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.
SMALL ENGINE CONTROL IC
Features:
EK Pb-FREE SUFFIX
98ASA10556D
32 Pin SOICW EP
• 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
ORDERING INFORMATION
Temperature
• 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
Device
Package
Range (T )
A
• 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
MCZ33812EK/R2
-40° to 125°C
32 SOICW-EP
*PCZ33812AEK/R2
*Note: AEC qualified for automotive applications
• 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
• Pb-free packaging designated by suffix code EK
33812
VBAT
VBAT
VBAT
+5 V
MIL
VPWR
LAMPOUT
PNP
RELAY OR
OTHER LOAD
VCCREF
VCCSENS
LAMPIN
RIN
ROUT
VCC
INJECTOR
VBAT
VPWR
VBAT
GPIO
GPIO
INJOUT
+5 V
RESET
RESET
GPIO
IGNSUP
IGNFB
WDRFSH
INJIN
GPIO
GPIO
MCU
IGNOUTH
IGNOUTL
INJFLT
GPIO
IGNIN
(IGBT DRIVER SHOWN)
IGNFLT
RELFLT
MRX
GPIO
GPIO
RXD
TXD
MTX
TM_EN, TEST2
WD_INH
PGND1,2
DGND
ISO9141
Note: Surge Voltage protection recommended on VPWR
ISO9141
Figure 1. 33812 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2009. All rights reserved.