Техническая Спецификация для Infineon Technologies Door Module Power IC TLE 8201R DEMOBOARD TLE8201R DEMOBOARD TLE8201R
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DEMOBOARD TLE8201R
TLE 8201R
Data Sheet Rev. 2.0
36
2006-06-07
Short Circuit in On-state
If a switch is already on and the current rises above the shutdown threshold
I
SD
for
longer than the shutdown delay time
t
dSD
the output transistor is turned off and the
corresponding diagnosis bit is set. This is independent of the voltage V
out
. See
Figure 17
Short circuit protection in on-state
4.6.1.2
Open Load
For the high-side switches, an open-load in OFF-state scheme is used as shown in
. The output is pulled up by a current source
I
OpL
. In OFF-state, the output
voltage is monitored and compared to the threshold
V
OpL
. If the voltage rises above this
threshold, the open-load signal is set to high. This is equivalent to comparing the load
resistance to the value
resistance to the value
V
OpL
/ I
OpL
. The open load error bit is latched and can be reset
by the SPI status register reset or by a power-on reset.
The pull-up current can be switched on and off by the OpLxON bits. This bit should be
set to LOW (i.e. pull-up current switched off) if an output is used to drive LEDs because
they may emit light if biased with the pull-up current.
set to LOW (i.e. pull-up current switched off) if an output is used to drive LEDs because
they may emit light if biased with the pull-up current.
t
dSD8
I
SC8
I
SD8
I
OUT
OUT 8...11
short to GND
t
I
OUT