TLE7232G datasheet(19/36 Pages) INFINEON

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SPI Driver for Enhanced Relay Control

SPIDER - TLE 7232G

Protection Functions

Data Sheet

V1.0, 2005-09-30

Figure 8

Over Load Behavior

4.2.2

Over Temperature Protection

A temperature sensor for each channel causes an overheated channel n to switch off

immediately to prevent destruction. The behavior in case of over temperature can be

configured as follows:

a) After cooling down, the channel is switched on again with thermal hysteresis

∆Tj.

b) The affected channel stays switched off until the over temperature flag is cleared.

The over temperature flag of the affected channel is cleared by a low-high transition of

the input signal.

4.2.3

Reverse Polarity Protection

In case of reverse polarity, the intrinsic body diode of the power transistor causes power

dissipation. The reverse current through the intrinsic body diode has to be limited by the

connected load. The

dd supply pin must be protected against reverse polarity externally.

The over-temperature protection as well as other protective functions are not active

during reverse polarity.

OverLoadTiming .emf

td(fault)

L = 1

L = 0

D(lim)

td(off)

L = 1

L = 0

D(lim)

OLCR.OVL = 0

OLCR.OVL = 1

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