TLE82453-3SA_15 Datasheet, PDF (32/71 Pages) Infineon Technologies AG – 3 Channel High-Side and Low-Side Linear Solenoid Driver IC

9
Protection Functions
TLE82453-3SA
Protection Functions
9.1
Overview
The device provides embedded protection functions which are designed to prevent IC destruction under fault
conditions described in this datasheet. Fault conditions are considered as “outside” normal operating range.
Protection functions are neither designed for continuous nor for repetitive operation. There are overload,
overtemperature, and overvoltage protection circuits implemented in this device.
Vref
VIO
CSB
SCK
SPI
SO
SI
Overload
Protection
control
logic
Gate Control
Temperature
Sensor
Gate Control
Overload
Protection
LSUPx
T
LOADx
PGNDx
Figure 11 Protection Functions Block Diagram
Protection_ Block_ Diagram.vsd
9.2
Overcurrent Protection
The load current is limited by the device itself in case of overload. An overload can be caused by a short to ground
when the channel is configured for high-side operation, or by a short to battery when the channel is configured for
low-side operation. The channel is switched off when the overload condition is detected, the setpoint and EN bit
are cleared to 0, and the fault bit is latched in the DIAGNOSIS register. The fault bit is cleared when the
DIAGNOSIS register is read by an SPI access. The channel can be turned on again by re-activating the channel
by setting a nonzero average current setpoint. See the Diagnostic Functions Section (Section 10) for further
description.
Data Sheet
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32
Rev 1.0, 2015-03-27