ITS4075Q-EP-D datasheet(23/42 Pages) INFINEON

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Data Sheet

23

Rev. 1.01

2018-06-14

ITS4075Q-EP-D

75 mΩ Quad Channel Smart High-Side Power Switch

Protection Functions

6

Protection Functions

The device provides integrated protection functions. Exposure to absolute maximum rating conditions for

extended periods may affect device reliability. Protection functions are designed to prevent the destruction of

the ITS4075Q-EP-D due to fault conditions described in the data sheet. Please note that fault conditions are

not considered as normal operation conditions and the protection functions are neither designed for

continuous operation nor for repetitive operation.

6.1

Loss of Ground Protection

In case of loss of module ground when the load remains connected to ground, the device protects itself by

automatically turning OFF (when it was previously ON) or remains OFF, regardless of the voltage applied at the

input pins.

In an application where the inputs are directly controlled by logic levels <

VS (e.g. by a microcontroller without

galvanic isolation), it is recommended to use input resistors 1) between the external control circuit

(microcontroller) and the ITS4075Q-EP-D to protect also the external control circuit in case of loss of device

ground.

In case of loss of module or device ground, a current (

IOUT(GND)) can flow out of the DMOS. Figure 14 sketches

the situation.

ZGND is recommended to be a resistor in series to a diode.

Figure 14 Loss of Ground Protection with External Components

1) Recommended value is 10 kΩ

ITS4075Q-EP-D

OUTx

INx

VS

Logic

GND

ZDS(AZ)

IOUT(GND)

ZGND

ZD(AZ)

ST

RIN

RST

+

-

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