TLE8201R datasheet(36/45 Pages) INFINEON

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TLE 8201R

Data Sheet Rev. 2.0

2006-06-07

Short Circuit in On-state

If a switch is already 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. This is independent of the voltage Vout. 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

Figure 18. 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 / IOpL. 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.

dSD8

ISC8

ISD8

OUT

OUT 8...11

short toGND

OUT

TLE8201R Datasheet(PDF) 36 Page - Infineon Technologies AG