AN4355 datasheet(20/25 Pages) STMICROELECTRONICS

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AN4355 데이터시트(PDF) 20 Page - STMicroelectronics

부품명	AN4355

상세설명	The L6480 and L6482 devices are motor controllers providing

PDF	25 Pages

Scroll/Zoom	100%

제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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20 / 25 page

Protections

AN4355

20/25

DocID025240 Rev 2

5.4

VS undervoltage

The device also provides an undervoltage detection feature for the power stage supply (VS)

through the integrated ADC. Connecting the ADCIN pin to VS through a voltage divider the

motor supply voltage is constantly monitored.

When the ADC input voltage falls below 1.16 V (typical), the protection is triggered and the

UVLO_ADC failure flag is asserted. The failure flag can be released through a GetStatus

command after the ADC input voltage returns above the threshold value. The protection

does not affect the device operation.

If the voltage divider is sized in order to obtain VREG/2 voltage at the ADCIN pin when VS is

at its nominal, the VS undervoltage threshold corresponds to a reduction of the 30% of the

nominal supply voltage.

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