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33812_10

Description
Multifunctional Ignition and Injector Driver
File Size476KB,25 Pages
ManufacturerFREESCALE (NXP)
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33812_10 Overview

Multifunctional Ignition and Injector Driver

Freescale Semiconductor
Advance Information
Document Number: MC33812
Rev. 5.0, 7/2010
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.
Features:
33812
SMALL ENGINE CONTROL IC
EK Pb-FREE SUFFIX
• Designed to operate over the range of ~4.7 V
V
PWR
36 V
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
ORDERING INFORMATION
• Ignition pre-driver has independent high and low side outputs
• Relay driver - Current Limit - 4.0 A Typical
Temperature
Device
Package
• Lamp driver- Current Limit - 1.5 A Typical
Range (T
A
)
• All external outputs protected against short to battery, over-current
MCZ33812EK/R2
• Ignition and other drivers protected against over-temperature
-40° to 125°C
32 SOICW-EP
*MCZ33812AEK/R2
• Interfaces directly to MCU Using 5.0 V parallel interface
• 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
VCC
GPIO
GPIO
RESET
33812
VPWR
PNP
VCCREF
VCCSENS
LAMPIN
RIN
RESET
MIL
LAMPOUT
V
BAT
V
BAT
ROUT
INJOUT
IGNSUP
IGNFB
IGNOUTH
IGNOUTL
INJECTOR
V
BAT
V
PWR
RELAY OR
OTHER LOAD
V
BAT
+5 V
GPIO
WDRFSH
INJIN
INJFLT
IGNIN
IGNFLT
RELFLT
MRX
MTX
TM_EN, TEST2
WD_INH
PGND1,2
DGND
MCU
GPIO
GPIO
GPIO
GPIO
GPIO
RXD
TXD
(IGBT DRIVER SHOWN)
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., 2010. All rights reserved.

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