Data Sheet

7

Rev 1.0, 2015-04-28

ITS42k5D-LD-F

Functional Description

Figure 4

Input / output timings when switching a resistive load.

4.3

Protection Functions

Note: Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Integrated protection functions are designed to prevent IC destruction under fault conditions described in the

data sheet. Fault conditions are considered as “outside” the normal operating range. Protection functions

are neither designed for continuous nor repetitive operation.

4.3.1

Short Circuit Protection

Short circuit is a special case of overload. The device is protected within the supply voltage range from

V

V to 42 V. If the device stays in short circuit condition for a longer time the integrated temperature protection will

switch the device OFF (both channels OFF). For details please look at chapter “Overtemperature Protection”.

4.3.2

Protection by Overtemperature Shutdown

This circuit monitors the junction temperature

T

proportional to the power loss. The temperature protector is equipped with two temperature sensors, one for each

one of the powerstages. When the thermal shutdown trip point

T

OFF the respective channel. This overtemperature shutdown is reported via diagnosis to the respective status flag

i.e. either ST1 and ST2. The output remains OFF until the junction is cooled down to the thermal shutdown release

point

T

is not recommended for the device to stay in an overload condition as this will degrade its lifetime.

10%

90%

(dV/dt)

ON

t

100%

(dV/dt)

OFF

t