33812 Datasheet, PDF (1/25 Pages) Freescale Semiconductor, Inc – SMALL ENGINE CONTROL IC

Freescale Semiconductor
Advance Information
Document Number: MC33812
Rev. 4.0, 7/2009
Multifunctional Ignition and
Injector 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 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.
33812
SMALL ENGINE CONTROL IC
Features:
• Designed to operate over the range of ~4.7 V ≤ V_PWR ≤ 36 V
• Fuel Injector driver - Current Limit - 4.0 A Typical
• Ignition pre-driver can drive IGBT or Darlington bipolar junction
EK Pb-FREE SUFFIX
98ASA10556D
32 Pin SOICW EP
transistors
• Ignition pre-driver has independent high and low side outputs
ORDERING INFORMATION
• 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
Device
MCZ33812EK/R2
*PCZ33812AEK/R2
Temperature
Range (T_A)
-40° to 125°C
Package
32 SOICW-EP
• VCC voltage pre-regulator provides +5.0 V power for the MCU
*Note: AEC qualified for automotive applications
• 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
• Pb-free packaging designated by suffix code EK
V_BAT
+5 V
MCU
VCC
GPIO
GPIO
RESET
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
RXD
TXD
PNP
VPWR
33812
LAMPOUT
MIL ^VBAT
V_BAT
+5 V
VCCREF
VCCSENS
LAMPIN
RIN
RESET
WDRFSH
ROUT
INJECTOR
INJOUT
V_BAT
IGNSUP
IGNFB
V_PWR
RELAY OR
OTHER LOAD
V_BAT
INJIN
INJFLT
IGNOUTH
IGNIN
IGNFLT
RELFLT
MRX
MTX
IGNOUTL
(IGBT DRIVER SHOWN)
TM_EN, TEST2
WD_INH
PGND1,2
DGND
ISO9141
ISO9141
Note: Surge Voltage protection recommended on VPWR
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.