Analog Integrated Circuit Device Data

Freescale Semiconductor

5

MM912_P812

INTERNAL BLOCK DIAGRAM

Figure 4. 33812 Simplified Internal Block Diagram

Oscillator

INJIN

VPWR

IGNIN

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

Lamp Output

Ignition

IGNSUP

Predriver

IGNFB

GND

TEST3

TEST1

PGND1

PGND2

DGND

IGNFLT

WATCHDOG

RESET

VCC

INJFLT

LAMPIN

WDRFSH

RIN

VCC

VCC

IGNOUTH

Short

Protection

IGNOUTL

Injector Output

TEST2

WD_INH

VCC

RELFLT

VCC

(Open Drain)

TM_EN

Notes

4.

Pull-up and pull-down current sources are ~50 µA, unless otherwise noted