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AN3271 Datasheet(PDF) 15 Page - STMicroelectronics

Part # AN3271
Description  This application note provides
PDF  29 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3271 Datasheet(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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