TLE75620-EST datasheet(44/81 Pages) INFINEON

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Datasheet

Rev. 1.0

2017-11-23

TLE75620-EST

SPIDER+ 12V

Protection Functions

8.1

Over Load Protection

The TLE75620-EST is protected in case of over load or short circuit of the load. There are two over load current

thresholds (see Figure 21):

• IL(OVL0) between channel switch ON and tOVLIN

• IL(OVL1) after tOVLIN

Every time the channel is switched OFF for a time longer than 2 * tSYNC the over load current threshold is set

back to IL(OVL0).

Figure 21 Over Load current thresholds

In case the load current is higher than IL(OVL0) or IL(OVL1), after time tOFF(OVL) the over loaded channel is switched

OFF and the according diagnosis bit ERRn is set. The channel can be switched ON after clearing the protection

latch by setting the corresponding HWCR_OCL.OUTn bit to “1”. This bit is set back to “0” internally after de-

latching the channel. Please refer to Figure 22 for details.

Figure 22 Latch OFF at Over Load

8.2

Over Temperature Protection

A temperature sensor is integrated for each channel, causing an overheated channel to switch OFF to prevent

destruction. The according diagnosis bit ERRn is set (combined with Over Load protection). The channel can

INn

IL(OVL)

OverLoadStep.emf

tOVLIN

OUT.OUTn

IL(OVL0)

IL(OVL 1)

INn

ILn

OverLoad.emf

tOFF(OVL)

IL(OVLn)

OUT.OUTn

SPI command to set

HWCR_OCL.OUTn = 1b

ERRn

HWCR_OCL.OUTn

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