STGAP1ASTR datasheet(40/70 Pages) STMICROELECTRONICS

Part #	STGAP1ASTR

Description	Automotive galvanically isolated advanced single gate driver

PDF	70 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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40 / 70 page

Functional description

STGAP1AS

40/70

DocID029344 Rev 2

7.14.3

SENSE comparator check

The purpose of this security check is to verify the functionality of the sense comparator.

To enable this check, it is required to set SNSCHK = '1' and SENSE_EN = '1'.

When this check is enabled the switch in series to the SENSE pin is open (see Figure 18);

a SENSE fault (STATUS1 register) should be reported within tSENSEchk, otherwise the

SENSE comparator operation is compromised.



VSENSEcomp > VSENSEth → comparator OK → SENSE = '1'



VSENSEcomp < VSENSEth → comparator FAIL → SENSE = '0'

The SENSE fault generated by this test is latched and shall be cleared accordingly.

Figure 18. SENSE comparator and resistor check circuitry

Level

Shifter

Floating

Section

Control

Logic

Floating ground

GON

GOFF

CLAMP

GNDISO

SENSE

VSENSEth

Rtest

RSENSE

testcontrol

SDO

SDI

ISENSERchk

testcontrol

SPI

Control

Logic

SENSEcomp

STGAP1ASTR Datasheet(PDF) 40 Page - STMicroelectronics

STGAP1ASTR Datasheet(HTML) 40 Page - STMicroelectronics

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