Datasheet




SLUS462E − SEPTEMBER 2000 − REVISED NOVEMBER 2004
www.ti.com
7
FUNCTIONAL BLOCK DIAGRAM
−
+
Charge Control, Charge Timer
and
Display Logic
OSC
V
CC
V
CC
STAT1
STAT2
TaperDet
REG
PWRDWN
CR
ChargeOK
PWRDWN
UVS
Thermal
Shutdown
T
MR SEL
−
+
−
+
Power On
Delay
CLRFLTAPG/
THERM
R9
Precharge
Bias and
Ref
Generator
V
ref
V
uvlo
H: V
reg
= 4.2 V/Cell
L: V
reg
= 4.1 V/Cell
VSEL
EN
R8
ChipEN
UVS
V
uvlo
+
−
ChargeOK
LowV
+
−
V
ilim
V
CC
ISNS
−
+
TaperDet
IN
V
ref
AGND
VSENSE
OUT
GND/
HEATSINK
+
−
OverV
+
−
HighV
−
+
LowV
V
ref
PWRDWN
Two Ope
n
Drain
Outputs
for
bq24002
0.2*V
ilim