ITS4075Q-EP-D datasheet(15/42 Pages) INFINEON

Part #	ITS4075Q-EP-D

Description	75 m廓 Quad Channel Smart High-Side Power Switch

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Manufacturer	INFINEON [Infineon Technologies AG]

Direct Link	http://www.infineon.com

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Data Sheet

15

Rev. 1.01

2018-06-14

ITS4075Q-EP-D

75 mΩ Quad Channel Smart High-Side Power Switch

Power Stage

5.3

Inductive Load

5.3.1

Output Clamping

When switching OFF inductive loads with high-side switches, the voltage

VOUT drops below ground potential,

because the inductance intends to continue driving the current. To prevent the destruction of the device by

avalanche due to high voltage drop over the power stage a voltage clamp mechanism

ZDS(AZ) is implemented

that limits negative output voltage to a certain level (

VS - VDS(AZ)). The clamping mechanism allows in addition

a fast demagnetization of inductive loads because during the phase of active clamping the power is dissipated

to a great extent rapidly inside the switch. On the other hand the power dissipated inside the switch while

switching off inductive loads can cause considerable stress to the device. Therefore the maximum allowed

energy at a given current (and by this also the inductance) is limited. In Figure 8 and Figure 9 the basic

principle of active clamping as well as simplified waveforms when switching off inductive loads are illustrated.

Figure 8

Output Clamp

Figure 9

Switching an Inductive Load Timing

ITS4075Q-EP-D

OUTx

INx

VS

Driver

Logic

GND

Bias

ZDS(AZ)

VS

VÎN

IL

L, RL

ZGND

VDS

VOUT

IN

V

OUT

I

L

V

S

V

S-VDS(AZ)

t

Switching an inductance.vsd

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ITS4075Q-EP-D Datasheet(PDF) 15 Page - Infineon Technologies AG

ITS4075Q-EP-D Datasheet(HTML) 15 Page - Infineon Technologies AG

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