TLE8201R Datasheet, PDF (36/45 Pages) Infineon Technologies AG – Door Module Power IC

TLE 8201R
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
OUT 8...11
I_OUT
short to GND
I_OUT
I_SC8
I_SD8
t_dSD8
t
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
Figure 18. 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 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.
Data Sheet Rev. 2.0
36
2006-06-07