Data Sheet

21

Rev. 1.4, 2014-10-28

TLE8209-2

Protection and Monitoring

The short circuit to ground detection is activated when the current through one of the high side switches rises over

In single switch mode only the affected output will be switched off.

8.5

Short Circuit to Battery

A short circuit to battery is detected in the same way as a short circuit to ground, only in the low side switch instead

of the high side switch.

8.6

Short Circuit across the Load

Short circuit over load is indicated by two failures - short circuit to ground on one output and short circuit to battery

on the other output. Both failure bits will be set in the SPI diagnostics register. Both output stages will be turned off.

8.7

Overtemperature

In case of high DC-currents, insufficient cooling or high ambient temperature, the chip temperature may rise above

the thermal shut-down temperature

T

8.8

Undervoltage Shut-Down

are turned off. As soon as

V

8.9

Open Load Diagnosis

Open load diagnosis is only possible if outputs are switched off by DIS or ABE. The diagnostic current sources are

deactivated in status flag mode. Diagnostic current sources are disconnected if outputs are active. That means

that the diagnostic current sources are also disconnected if the outputs are deactivated due to short circuit. The

open load detection in H-bridge mode is different from the open load detection in single switch mode.

Open Load Detection in H-Bridge mode

Figure 13

Open Load Detection in H-Bridge Mode

VDD

+

-

OUT1

OUT1_L

+

-

OUT2

OUT2_L