STGAP1S datasheet(39/67 Pages) STMICROELECTRONICS

Numer części	STGAP1S

Szczegółowy opis	gapDRIVE™: galvanically isolated single gate driver

PDF	67 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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39 / 67 page

DocID027190 Rev 3

39/67

STGAP1S

Functional description

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

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