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AN3271 датащи(PDF) 15 Page - STMicroelectronics

номер детали AN3271
подробное описание детали  This application note provides
PDF  29 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3271 датащи(HTML) 15 Page - STMicroelectronics

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AN3271
Low battery detection
Doc ID 17933 Rev 2
15/29
7
Low battery detection
The LED in Figure 13 is ON if:
●
PB button is pressed for power-up and low battery voltage is detected (i.e. VCC < VTH+).
●
Application is powered (i.e. EN or EN is asserted) and undervoltage is detected.
Thus the user can be easily informed of the undervoltage condition. VCCLO is an open drain
output.
Figure 13.
Using an LED for low battery voltage detection



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