Data Sheet TLE6282G

Data Sheet

2

Rev 2.4 2008-03-18

Application Block Diagram – Injector / Valve Drive

TLE6282G

SH1

TLE

4278G

V

C

S

47µF

C

D

47nF

D

I

Q

Reset

Watchdog

C

Q

22µF

µC

GH1

R

Q

47 k

Ω

DH1

BH1

SH2

GH2

DH2

BH2

GL1

DL1

GND

GL2

DL2

VS

WD

R

V

CC

ER1

DT/

DIS

R

Q

47 k

Ω

IH1

IL1

IH2

IL2

Load 2

Load 1

C

B

220nF

C

B

220nF

C

S

1µF

R

10

Ω

R

SCDL1

R

SCDL2

R

SCDL3

R

SCDL4

This application diagram shows the principle schematics of a typical injector / valve drive. Other

configurations are possible as well. Freewheeling diodes are not considered. The voltage divider

networks, e.g. R = 10 kΩ, across the two Low Side MOSFETs are an example as well; they allow

to increase the current limit threshold for Short Circuit protection SCD for the Low Side MOS-

FETs. As they pull down the Sources of the High Side MOSFETs (while the Low Side MOSFETs

abled). The SCD current limit threshold can be increased for the High Side MOSFETs as well by

using voltage divider networks across the High Side MOSFETs. SCD can also be disabled (High

Side and / or Low Side MOSFETs).