BQ24020_07 Datasheet, PDF (8/22 Pages) Texas Instruments – SINGLE-CHIP, LI-ION AND LI-POL CHARGER IC WITH AUTONOMOUS USB-PORT AND AC-ADAPTER SUPPLY MANAGEMENT (bqTINY-II)

bq24020, bq24022, bq24023
bq24024, bq24025, bq24026
bq24027
SLUS549D – DECEMBER 2002 – REVISED MARCH 2006
FUNCTIONAL BLOCK DIAGRAM
www.ti.com
AC
V_I(AC)
V_I(USB)
USB
REF
BIAS
AND
UVLO
V_I(SET)
V_{I(OUT) +}
V_I(REG)
+
AC/USB
V_I(ISET-USB)
V_(SET)
CHG
ENABLE
AC/USB
AC
V_I(OUT)
sensefet ^VI(ISET)
USB
sensefet
V_O(REG)
UVLO
sensefet
V_(HTF)
*
I_(TS)
TS
THERMAL
SHUTDOWN
SUSPEND
*
V_(LTF)
CE
V_I(ISET-USB)
100 mA/500 mA
AC/USB
CHG ENABLE
500 mA/ 100 mA
TTE
OR
TE
V_I(OUT)
V_I(AC)
V_I(OUT)
V_I(USB)
VO(REG)
V_I(OUT)
*
SLEEP (AC)
V_BAT
ISET1
*
SLEEP (USB)
CHARGE
PRECHARGE
(C/10)
CONTROL,
TIMER,
AND
500 mA/ 100 mA
DISPLAY
*
RECHARGE
LOGIC
USB CHARGE
V_I(OUT)
*
PRECHARGE
V_I(SET)
V_I(SET)
V_I(SET)
* _{t(TAPER) TIMER} ^TAPER
*
TERM
VSS
* ^{SIGNAL DEGLITCHED}
OUT
ISET1
ISET2
PG
STAT1
STAT2
UDG−02185
8
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