33812 Datasheet PDF - Freescale Semiconductor
| Part Number | 33812 | |
| Description | Multifunctional Ignition and Injector Driver | |
| Manufacturers | Freescale Semiconductor | |
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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.
33812
SMALL ENGINE CONTROL IC
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
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
*MCZ33812AEK/R2
Temperature
Range (TA)
-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
VBAT
+5 V
MCU
VCC
GPIO
GPIO
RESET
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
RXD
TXD
PNP
VPWR
33812
LAMPOUT
MIL VBAT
VBAT
+5 V
VCCREF
VCCSENS
LAMPIN
RIN
RESET
WDRFSH
ROUT
INJECTOR
INJOUT
VBAT
IGNSUP
IGNFB
VPWR
RELAY OR
OTHER LOAD
VBAT
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., 2010. All rights reserved.
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PIN CONNECTIONS
Table 1. 33812 Pin Definitions
Pin
Pin Name
Pin
Function
18 MRX Output
19 WDRFSH
Input
Formal Name
Low Side Driver Output
Watchdog Refresh
20 TM_EN
Input
21
N.C.
Unused
22 ROUT Output
23 PGND2 Ground
24 LAMPOUT Output
Test Mode Enable
-------
Relay Driver Output
Power Ground 2
Warning Lamp Output
25 DGND Ground
26 PGND1 Ground
27 INJOUT Output
28
N.C.
Unused
29 WD_INH
Input
Supply Ground
Power Ground 1
Injector Driver Output
-------
Watch Dog Inhibit
30 TEST1
Input
31 TEST2
Input
32 TEST3
Input
EP GND Ground
Test 1
Test 2
Test 3
Substrate Ground
Description
Output logic level ISO9141 data to the MCU from the ISO9141 IN/OUT pin
Logic Level input from MCU to refresh the watchdog circuit to prevent
RESET
Used by Freescale test engineering, tie to Gnd in operation
Unused pin, leave open
Low side relay driver output driven by parallel input RIN
Ground for RELAY driver output
Low side driver output for MIL (warning lamp) driven by parallel input
LAMPIN
Tied to ground plane, used for ground for all low power signals
Ground for INJOUT injector driver output
Low side driver output for Injector driven by parallel input INJIN
Unused pin, leave open
Normally tied to GND, If tied high through a pull-up, it inhibits RESET from
a watchdog time-out
MUST be tied to GND.
MUST be tied to GND.
MUST leave OPEN.
Should be tied to DGND.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33812
5
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| Information | Total 25 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ 33812.PDF Datasheet ] | |
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