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SPI Driver for Enhanced Relay Control

SPIDER - TLE 7232G

Protection Functions

Data Sheet

V1.0, 2005-09-30

4.2

Protection Functions

The device provides embedded protective functions. Integrated protection functions are

designed to prevent IC destruction under fault conditions described in this data sheet.

Fault conditions are considered as “outside” normal operating range. Protection

functions are not designed for continuous repetitive operation.

There is an over load and over temperature protection implemented in the SPIDER -

TLE 7232G. The behavior of the protective functions can be set-up via SPI. Following

figure gives an overview about the protective functions.

Figure 7

Protective Functions

4.2.1

Over Load Protection

The SPIDER - TLE 7232G is protected in case of over load or short circuit of the load.

The behavior in case of over load can be configured as follows:

a) The current is limited to

DS(LIM). After time td(fault), the according over load flag Ln is

set. The channel may shut down due to over temperature.

b) The current is limited to

DS(LIM). After time td(off), the over loaded channel n switches

off and the according over load flag Ln is set.

The over load flag (CLn) of the affected channel is cleared by a low-high transition of the

input signal. For timing information, please refer to Figure 8 for details.

Protection.emf

OUTn

input mapping

MAPn

BOLn

OUTn

temperature

monitor

current

limitation

gate control

OVTn

CLn

OVLn

delay

GND

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