PC33814 Datasheet PDF - Freescale Semiconductor
| Part Number | PC33814 | |
| Description | Two Cylinder Small Engine Control IC | |
| Manufacturers | Freescale Semiconductor | |
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Freescale Semiconductor
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Document Number: MC33814
Rev. 1.0, 8/2012
Two Cylinder Small Engine
Control IC
33814
The 33814 is an engine control analog power IC intended for two cylinder
motorcycle and other small engine control applications. The IC consists of
TWO CYLINDER SMALL ENGINE
CONTROL IC
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.
Features:
• Operates over supply voltage range of 4.5 V VPWR 36 V
• Logic stability guaranteed down to 2.5 V
98ASA00173D
AE SUFFIX (PB-FREE)
48-PIN LQFP-EP
• 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
Small Engine Control for:
• Lawn Mowers
• Motor Scooters
• Small Motorcycles
• Lawn Trimmers
• Snow Blowers
• Chain Saws
• Gasoline-driven Electrical Generators
• Outboard Motors
• 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
.
VBAT
Keyswitch
VBAT
MC33814
KEYSW
VPWR
VPROT ROUT2
LAMPOUT
VBAT
MIL
5.0 V Sensor Supply
Relay 2
(Power)
MCU
VCC
+5.0 V
RESETB
VPPREF
VPPSENS
VCC
RESETB
ROUT1
TACHOUT
O2HFB
O2HOUT
O2HSENSP
O2HSENSN
TACHOMETER
Relay 1
(Fuel Pump)
O2 Heater
SPI
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
4
Crankshaft VRS
SPI
MRX
MTX
BATSW
RIN1
RIN2
IGNIN1
IGNIN2
INJIN1
INJIN2
VRSOUT
O2HIN
VRSP
VRSN
GND
INJOUT1
INJOUT2
ISO9141
IGNFB1
IGNOUT1
IGNFB2
IGNOUT2
IGNSENSP
IGNSENSN
VBAT
Injectors
VBAT
ISO9141
VBAT
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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3 Pin Connections
3.1 Pinout Diagram
Transparent Top View
O2HFB
O2HOUT
IGNSENSP
IGNSENSN
O2HSENSN
O2HSENSP
VRSOUT
VRSP
VRSN
CSB
VPWR
SCLK
48 47 46 45 44 43 42 41 40 39 38 37
1 36
2 35
3 34
4 33
5 32
6 31
7 30
8 29
9 28
10 27
11 26
12 25
13 14 15 16 17 18 19 20 21 22 23 24
RIN1
RIN2
O2HIN
IGNIN1
IGNIN2
INJIN1
INJIN2
BATSW
MTX
MRX
TACHOUT
NC
3.2 Pin Definitions
Figure 3. 33814 Pin Connections
Table 2. 33814 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page 20.
Pin
Pin Name
Pin
Function
Formal Name
Description
1
O2HFB
Input
O2 Sensor Heater Voltage feedback from drain of O2 Sensor Heater driver FET
Feedback Input
2
O2HOUT
Output
O2 Sensor Heater Pre-driver output for O2 Sensor Heater driven by SPI input or O2HIN pin
Output
3
IGNSENSP
Input
Ignition Current Positive input to the ignition current sense differential amplifier
Sense Input Positive Used to measure current in IGBT emitter resistor for IGNOUT1 and
IGNOUT2, if used.
4
IGNSENSN
Input
Ignition Current Negative input to the ignition current sense differential amplifier
Sense Input Negative Used to measure current in IGBT emitter resistor for IGNOUT1 and
IGNOUT2, if used
5
O2HSENSN
Input
O2 Heater Current Negative input to the O2 heater current sense differential amplifier
Sense Input Negative Used to measure current in of O2 heater driver MOSFET source resistor, if
used.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33814
5
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| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ PC33814.PDF Datasheet ] | |
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