BQ24001 Datasheet, PDF (7/23 Pages) Texas Instruments – SINGLE-CELL Li-ION CHARGE MANAGEMENT IC FOR PDAs AND INTERNET APPLIANCES

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FUNCTIONAL BLOCK DIAGRAM
bq24001
bq24002
bq24003
SLUS462D – SEPTEMBER 2000 – REVISED MAY 2002
IN
ISNS
VCC
+
–
0.2*Vilim
Vilim
+
–
Vuvlo
UVS
TaperDet
–
+
Precharge
ChipEN
Vref
ChargeOK
LowV
OverV
EN
VSEL
APG/
THERM
H: Vreg = 4.2 V/Cell
L: Vreg = 4.1 V/Cell
R9
R8
Power On
Delay
Bias and
Ref
Generator
Vref Vuvlo
+
CLRFLT
–
+
–
Thermal
Shutdown
UVS
HighV
LowV
Vref
PWRDWN
TMR SEL
TaperDet
PWRDWN
PWRDWN _OSC
Charge Control, Charge Timer
and
Display Logic
REG
ChargeOK
CR
OUT
VSENSE
AGND
GND/
HEATSINK
VCC
STAT1
VCC
STAT2
Two Open
Drain
Outputs
for
bq24002
7