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STBC21 Datasheet(PDF) 16 Page - STMicroelectronics

No. de pieza STBC21
Descripción Electrónicos  LI battery charger with thermal regulation
PDF  54 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STBC21 Datasheet(HTML) 16 Page - STMicroelectronics

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Detailed description
STBC21
16/54
Doc ID 023256 Rev 1
Figure 5.
Battery connection detection flowcharts
5.3
Start of charge
The STBC21 start of charge is subject to three variables: input voltage, battery connection
and battery temperature. The detection of these variables is filtered with different deglitching
as reported in
Table 7:
AM10416v 1
Ba ery connec on detec on at the End of Charge
Insert ba ery
Pin TEMP
connected
NO
Force IDETECT to
ba ery and start TDETECT
Start charging
YES
Wait for 400msec
(TWAIT)
VBAT>3.9V
&
TDETECT<300ms
NO
Sink ISINK from
ba ery and start TSINK
VBAT<3.0V
&
T
SINK<100ms
YES
Ba ery alarm
YES
NO
TDETECT ≥300ms
YES
NO
VBAT>3.9V
YES
NO
Start charging
Ba ery
removed
Ba ery unistalla on
LED SET
YES
NO
END
Sink ISINK from
ba ery and start TSINK
VBAT<3.0V
&
TSINK<100ms
YES
Termina on
Ba ery alarm
NO
Start Termina on
Ba ery
removed
Ba ery unistalla on
LED SET
YES
NO
END
Ba ery connec on detec on at Beginning of Charge



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