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| TLE6282G Datasheet, PDF (2/14 Pages) Infineon Technologies AG – Dual Half Bridge Driver IC | |||
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Data Sheet TLE6282G
Application Block Diagram â Injector / Valve Drive
W atchdog
Reset
TLE
I
4278G
Q
CQ
22µF
D
CD
47nF
R
10 â¦
CS
47µF
VS=12V
RQ
47 kâ¦
WD
R
VCC
RQ
47 kâ¦
µC
ER1
DT/
DIS
IH1
IL1
IH2
IL2
CS
1µF
VS
BH1
DH1
GH1
SH1
BH2
DH2
GH2
SH2
DL1
GL1
CB
220nF
Load 1
CB
220nF
Load 2
DL2
GL2
GND
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 10 m⦠resistor
is not needed by the Driver IC, but may be needed for load current measurement. The voltage
devider networks, e.g. R = 10 kâ¦, across the two Low Side MOSFETs are an example as well;
they allow to increas the current limit threshold for Short Circuit protection SCD for the Low Side
MOSFETs. As they pull down the Sources of the High Side MOSFETs (while the Low Side MOS-
FETs are off), they allow to pre-charge the CBx capacitors during start-up (before the Driver IC
gets enabled). The SCD current limit threshold can be increased for the High Side MOSFETs as
well by using voltage devider networks across the High Side MOSFETs. SCD can also be dis-
abled (High Side and / or Low Side MOSFETs).
2
Rev 2.2 2006-03-07
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