TLE7232G Datasheet, PDF (18/36 Pages) Infineon Technologies AG – SPI Driver for Enhanced Relay Control

SPI Driver for Enhanced Relay Control
SPIDER - TLE 7232G
Protection Functions
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.
IN
input mapping
OUTn BOLn MAPn
OVTn
Tn
temperature
monitor
&
&
gate control
OVLn
delay
current
limitation
CLn
Figure 7 Protective Functions
OUTn
T
GND
Protection.emf
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 I_DS(LIM). After time t_d(fault), the according over load flag Ln is
set. The channel may shut down due to over temperature.
b) The current is limited to I_DS(LIM). After time t_d(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.
Data Sheet
18
V1.0, 2005-09-30