TLE8102SG_12 Datasheet, PDF (15/34 Pages) Infineon Technologies AG – Smart Dual Channel Powertrain Switch

TLE 8102 SG
Smart Dual Channel Powertrain Switch
Electrical and Functional Description of Blocks
OT
IN
I_OUT
Output channel
with OT condition
No OT condition
OFF
ON
OT Failure
latched
Thermal shutdown
V_OUT
set
ST
set
FAULT
Two Bit
SO Diagnostic: ^HH
OT Flag: ^L
HL (OVL)
H (OT)
CS
reset
reset
HH
L
reset
rewritten
HL
HL
H
H
Valid SPI cycles
Figure 12 Over Temperature Behavior - Latched Shutdown
HH (Normal Function)
L (No OT condition)
OT_behaviour_Latch.vsd
5.3.4 Reverse Current
In the case of reverse polarity when outputs are turned on, the power stages of the TLE8102SG are able to
conduct reverse current I_rev, defined as current that flows from ground to the output pin. Please note that neither
the over load, over temperature, nor current sense diagnostics are functional in reverse current operation.
Additionally, it is possible for the supply current I_VDD to be greater than 5 mA.
5.3.5 Reverse Polarity Protection
In the case of reverse polarity when outputs are turned off, the intrinsic body diode of the power transistor causes
power dissipation. The reverse current through the intrinsic body diode has to be limited by the connected load.
The V_DD supply pin must be protected against reverse polarity externally. Please note that neither the over load,
over temperature, nor current sense diagnostics are functional in reverse current operation.
Data Sheet
15
V1.5, 2012-08-17