33812 datasheet(3/25 Pages) FREESCALE

Part #	33812

Description	Multifunctional Ignition and Injector Driver

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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Analog Integrated Circuit Device Data

Freescale Semiconductor

3

33812

Figure 3. 33812 Simplified Internal Block Diagram

VPWR, VCC

Oscillator

INJIN

VPWR

IGNIN

~50 µA

LOGIC CONTROL

Gate Control

Current Limit

Temperature Limit

Short Protection

Open det. on Injector

+

RS

lLimit

VClamp

–

Relay and

~75µA

INJOUT

VCCREF

Band Gap

PARALLEL

CONTROL

under-voltage

POR, over-voltage

V10.0 Analog

V2.5 Logic

Bias

ROUT

VCCSENS

+

RS

lLimit

VClamp

–

Gate Control

Current Limit

Temperature Limit

Short Protection

ISO9141

CONTROLLER

MRX

MTX

LAMPOUT

VCC

ISO9141

~50 µA

Lamp Output

Ignition

IGNSUP

Predriver

IGNFB

GND

TEST3

TEST1

PGND1

PGND2

DGND

IGNFLT

WATCHDOG

RESET

VCC

INJFLT

LAMPIN

WDRFSH

RIN

~50 µA

VCC

~50 µA

VCC

~50 µA

IGNOUTH

Short

Protection

IGNOUTL

Injector Output

TEST2

WD_INH

VCC

~50 µA

RELFLT

VCC

~50 µA

(Open Drain)

TM_EN

~50 µA

*Note: Pull up and pull down current sources are ~50 µA unless otherwise noted

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33812 Datasheet(PDF) 3 Page - Freescale Semiconductor, Inc

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