L9026 datasheet(28/60 Pages) STMICROELECTRONICS

部品番号	L9026

部品情報	Automotive configurable multi-channel relay driver 2HS 6HS/LS

PDF	60 Pages

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メーカー	STMICROELECTRONICS [STMicroelectronics]

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Protection functions

8.1

Overload protection

Device is protected in case of over load or short circuit of the load. This protection is present for each HS and LS

driver. There are two over load current thresholds (see Figure 13):

•

IL(OVL0) between channel switch ON and tOVLINDS1

•

IL(OVL1) after tOVLIN

Figure 13. Overload thresholds

Every time the channel is switched OFF the over load current threshold is set back to IL(OVL0).

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 corresponding diagnosis bit DIAG_OVC_OVT.OUTn is set to “1”. The channel can be switched ON

after clearing the protection latch by setting the corresponding DIAG_OVC_OVT_RLW.OUTn bit to “1”. This bit is

set back to “0” internally after de-latching the channel. Please refer to Figure 14 for details.

Figure 14. Latch off in overload condition

L9026

Protection functions

DS13397 - Rev 5

page 28/60

L9026 データシート(PDF) 28 Page - STMicroelectronics