TLE8102SG_12 Datasheet, PDF (20/34 Pages) Infineon Technologies AG – Smart Dual Channel Powertrain Switch

TLE 8102 SG
Smart Dual Channel Powertrain Switch
Electrical and Functional Description of Blocks
SHG/
UC
IN
SHG(“OFF”) /UC(“ON”)
Condition
ON
OFF
NO SHG/UC
I_OUT
V_Bat
I_nom
I_D(UC)
t_d(fault) t_d(fault)
t_d(fault)
t_d(fault) t_d(fault)
V_OUT
set
ST
V _DS(SHG)
reset
reset
I*R _{O N}
reset
set
FAULT
rewritten
set
reset
rewritten
SO ^{HH LH HH LH}
LL HH LL
LH
HH
(Normal
F u n c ti on )
(UC)
reset
(SHG)
CS
Valid SPI cycles
Figure 16 Diagnostic at "Short to GND/Under Current" Condition
t_d(fault)
t_d(fault)
t<t_d(fault)
reset
LH
HH
LL
HH
U C _S_GN D . v s d
5.5
Current Sense
The TLE8102SG includes an integrated current sense feature. If the device is programmed (via SPI) to use this
feature, the current source I_IS of the current sense pin becomes active and generates a pull-down current
proportional to the load current of the selected channel. An external pull-up resistor must be connected to the
current sense pin to generate a voltage signal proportional to the load current of the selected channel. To achieve
the specified accuracy for current sensing, the voltage V_IS at the current sense pin must always be greater than or
equal to 2 V. The current source I_IS can also be programmed to generate a current proportional to the sum of the
load current of both channels.
Data Sheet
20
V1.5, 2012-08-17