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| BQ25015 Datasheet, PDF (11/28 Pages) Texas Instruments – SINGLE-CHIP CHARGER AND DC/DC CONVERTER IC FOR PORTABLE APPLICATIONS | |||
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bq25015
bq25017
SLUS721A â DECEMBER 2006 â REVISED MARCH 2007
FUNCTIONAL DESCRIPTIONS (continued)
POR
Vcc > VI(BAT)
checked at all times
Yes
SLEEP MODE
No
Indicate SLEEP
MODE
VI(BAT)<V(LOWV)
Yes
Reset and Start
t(PRECHG) timer
No
Reset all timers,
Start t(CHG) timer
Regulate Current
or Voltage
Indicate Chargeâ
InâProgress
No
Tj < T(SHTDWN)
Yes
Suspend charge
No Indicate CHARGE
SUSPEND
Yes
t(CHG) Expired?
Tj < T(SHTDWN)
No
No
Yes
Yes
VI(BAT)<V(LOWV)
No
I(TERM)
detection?
No
Yes
No
t(TAPER)
Expired?
I(TAPER)
detection?
Yes
No
Yes
Yes
Turn off charge
Indicate DONE
No
Regulate
IO(PRECHG)
Indicate Chargeâ
InâProgress
VI(BAT)<V(LOWV)
Yes
t(PRECHG)
Expired?
Yes
Fault Condition
Indicate Fault
VI(BAT) > V(RCH)?
No
Enable I(FAULT)
current
VI(BAT) > V(RCH)?
Yes
Disable I(FAULT)
current
No
No
VI(BAT) < V(RCH)?
Yes
Figure 14. Operational Flow Chart
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