33813 Datasheet, PDF (1/54 Pages) Freescale Semiconductor, Inc – One Cylinder Small Engine Control IC

Freescale Semiconductor
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Document Number: MC33813
Rev. 1.0, 8/2012
One Cylinder Small Engine
Control IC
33813
The 33813 is an engine control analog power IC intended for one cylinder
motorcycle and other small engine control applications. The IC consists of
five integrated low side drivers, two pre-drivers, a Variable Reluctance
Sensor (VRS) input circuit, a voltage pre-regulator using an external pass
transistor, and two 5.0 volt internal regulators, one for the microcontroller
unit (MCU) V_CC supply and the other for use as a protected sensor supply.
Also included is an MCU reset control circuit with watchdog, an ISO 9141
K-line interface for diagnostic communication and a Serial Peripheral
Interface (SPI). The five low side drivers are intended for driving a fuel
injector, a lamp, two relays or other loads, and a tachometer. The pre-
driver is intended to drive IGBT or MOSFET transistors to control ignition
coils, and/or a HEGO heater. The device is packaged in a 48 pin LQFP-
EP with an exposed pad.
Features:
• Operates over a supply voltage range of 4.5 V  V_PWR  36 V
• Logic stability guaranteed down to 2.5 V
• One fuel injector driver - typical of 1.3 A
• One ignition IGBT or general purpose gate pre-driver
• One O2 sensor (HEGO) heater general purpose gate pre-driver
• Relay 1 driver, typically 2.0 A, can be used for fuel pump control
• Relay 2 driver, typically 1.0 A, can be used as power relay control
• Lamp driver, typically 1.0 A can also be used to drive an LED
• V_PROT protected sensor supply tracks V_CC +5.0 V regulator
• MCU reset generator -system integrity monitor (watchdog)
• V_PP pre-regulator provides power for V_CC and V_PROT regulators
• Independent fault protection with all faults reported via the SPI
• ISO 9141 K-line interface for communicating diagnostic messages
• Start-up / shut-down control and power sequence logic
• Interfaces directly to MCU using a 5.0 V SPI and logic I/O
• Differential / single-ended VRS conditioning circuit with auto/manual
selected thresholds and filter times with digital and tachometer outputs
ONE CYLINDER SMALL ENGINE
CONTROL IC
98ASA00173D
AE SUFFIX (PB-FREE)
48-PIN LQFP-EP
Applications
Small Engine Control for:
• Lawn Mowers
• Motor Scooters
• Small Motorcycles
• Lawn Trimmers
• Snow Blowers
• Chain Saws
• Gasoline-driven Electrical Generators
• Outboard Motors
V_BAT
Keyswitch
V_BAT
MCU _VCC
RESETB
+5.0 V
SPI
4
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
Crankshaft VRS
MC33813
KEYSW
VPWR
VPROT _ROUT2
LAMPOUT
ROUT1
TACHOUT
VPPREF
VPPSENS
VCC
O2HFB
O2HOUT
O2HSENSP
RESETB
O2HSENSN
SPI
MRX
MTX
BATSW
RIN1
RIN2
IGNIN1
INJIN1
VRSOUT
O2HIN
VRSP
VRSN
GND
INJOUT1
ISO9141
IGNFB1
IGNOUT1
IGNSENSP
IGNSENSN
V_BAT
MIL
TACHOMETER
V_BAT
Injector
5.0 V Sensor Supply
Relay 2
(Power)
Relay 1
(Fuel Pump)
O2 Heater
V_BAT
ISO9141
Figure 1. 33813 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., 2012. All rights reserved.