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33814

更新时间: 2022-05-04 15:17:49
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飞思卡尔 - FREESCALE /
页数 文件大小 规格书
50页 2092K
描述
Two Cylinder Small Engine Control IC

33814 数据手册

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Document Number: MC33814  
Rev. 1.0, 8/2012  
Freescale Semiconductor  
Product Preview  
Two Cylinder Small Engine  
Control IC  
33814  
TWO CYLINDER SMALL ENGINE  
The 33814 is an engine control analog power IC intended for two cylinder  
motorcycle and other small engine control applications. The IC consists of  
six integrated low side drivers, three pre-drivers, a Variable Reluctance  
Sensor (VRS) input circuit, a voltage pre-regulator using an external pass  
transistor, and two 5 volt internal regulators, one for the microcontroller  
unit (MCU) VCC supply, and one 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 six low side drivers are intended for driving two fuel  
injectors, a lamp, two relays or other loads, and a tachometer. The pre-  
drivers are intended to drive IGBT or MOSFET transistors to control  
ignition coils, and a HEGO heater. The device is packaged in a 48 pin  
LQFP-EP with an exposed pad.  
CONTROL IC  
98ASA00173D  
AE SUFFIX (PB-FREE)  
48-PIN LQFP-EP  
Features:  
• Operates over supply voltage range of 4.5 V VPWR 36 V  
• Logic stability guaranteed down to 2.5 V  
• Two fuel injector drivers - typical of 1.3 A each  
Applications  
• Two Ignition IGBT or general purpose gate pre-drivers  
• 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  
• VPROT protected sensor supply tracks VCC +5.0 V regulator  
• MCU reset generator - system integrity monitor (watchdog)  
• VPP pre-regulator provides power for VCC and VPROT 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  
Small Engine Control for:  
• Lawn Mowers  
• Motor Scooters  
• Small Motorcycles  
• Lawn Trimmers  
• Snow Blowers  
• Chain Saws  
• Gasoline-driven Electrical Generators  
• Outboard Motors  
• Differential / single-ended VRS conditioning circuit with auto/manual  
selected thresholds and filter times with digital and tachometer outputs  
.
MC33814  
VBAT  
5.0 V Sensor Supply  
VBAT  
Keyswitch  
VBAT  
KEYSW  
VPROT  
Relay 2  
(Power)  
ROUT2  
MIL  
VPWR  
LAMPOUT  
ROUT1  
Relay 1  
(Fuel Pump)  
TACHOMETER  
O2 Heater  
TACHOUT  
VPPREF  
O2HFB  
O2HOUT  
MCU  
VPPSENS  
VCC  
V
CC  
+5.0 V  
O2HSENSP  
RESETB  
RESETB  
O2HSENSN  
INJOUT1  
VBAT  
4
SPI  
SPI  
MRX  
MTX  
BATSW  
RIN1  
RIN2  
IGNIN1  
IGNIN2  
INJIN1  
INJIN2  
VRSOUT  
O2HIN  
VRSP  
GPIO  
GPIO  
GPIO  
GPIO  
GPIO  
GPIO  
GPIO  
GPIO  
GPIO  
GPIO  
GPIO  
Injectors  
VBAT  
INJOUT2  
ISO9141  
ISO9141  
IGNFB1  
IGNOUT1  
IGNFB2  
IGNOUT2  
IGNSENSP  
IGNSENSN  
VBAT  
VRSN  
GND  
Crankshaft VRS  
Figure 1. 33814 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.  

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