BQ24004 Datasheet, PDF (7/22 Pages) Texas Instruments – TWO-CELL Li-ION CHARGE MANAGEMENT IC FOR PDAs AND INTERNET APPLIANCES

www.ti.com
FUNCTIONAL BLOCK DIAGRAM
bq24004
bq24005
bq24006
SLUS476B – DECEMBER 2000 – REVISED MAY 2002
IN
ISNS
VCC
+
–
0.2*V(ilim)
V(ilim)
+
UVS
–
V(uvlo)
TaperDet
–
+
Precharge
ChipEN
ChargeOK
V(ref)
LowV
OverV
EN
VSEL
H: V(reg) = 8.4 V/Cell
L: V(reg) = 8.2 V/Cell
R9
R8
Power On
Delay
Bias and
Ref
Generator
V(ref) V(uvlo)
HighV
LowV
V(ref)
APG/
THERM
+
CLRFLT
PWRDWN
–
+
Thermal
–
Shutdown
UVS
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
bq24005
7