STPM32_V01 datasheet(58/121 Pages) STMICROELECTRONICS

전자부품 데이터시트 검색엔진

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STPM32 데이터시트(PDF) 58 Page - STMicroelectronics

부품명	STPM32

상세설명	ASSP for metering applications with up to four independent 24-bit 2nd order sigma-delta ADCs, 4 MHz OSF and 2 embedded PGLNA

PDF	121 Pages

Scroll/Zoom	100%

제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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58 / 121 page

Theory of operation

STPM32, STPM33, STPM34

58/121

DS10272 Rev 8

Figure 44. Swell detection process

Sag and swell threshold calculation

Thresholds for sag voltage detection are calculated below, according to the following input

parameters:

VL: line voltage nominal RMS value

VSAG: target RMS value of sag voltage

R1, R2: voltage divider resistors

AV = 2, voltage channel gain

DSAG = 210, length of sag threshold register

calV = 0.875, calibrator mid value

Table 16. Voltage sag

Parameter

Value

SAG peak voltage

Input signal

Percentage of FS input

Vin_SAG_peak FS



VSAG

Vref

-------------- AV

2calV

R1 R2

--------------------





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