Infineon Technologies Door Module Power IC TLE 8201R DEMOBOARD TLE8201R DEMOBOARD TLE8201R Hoja De Datos

Data Sheet Rev. 2.0

31

2006-06-07

Output 7 is a high-side switch intended to drive ohmic loads like the heater of an exterior
mirror.

If the high-side switch is turned on and the current rises above the shutdown threshold

SD

 for longer than the shutdown delay time 

dSD

, the output transistor is turned off and

the corresponding diagnosis bit is set. During the delay time, the current is limited to 

SC

as shown in 

. 

The output stage stays off and the error bit set until a status register reset is sent to the
SPI or a power-on reset is performed.

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 

OpL

. In OFF-state, the output

voltage is monitored and compared to the threshold 

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 

OpL

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. 

dSD

SC

SD

OUT7

short to GND