Datasheet

3
bq2002D/T
Chip on
V
CC
4.0V
Battery Voltage
too High?
Battery
Temperature?
Charge
Pending
Fast Charge,
CC = Z
LED = Low
SD2002D.eps
V
BAT
< 2V
V
BAT
< 2V and
V
BAT
>
2V
Off,
CC = Low
LED = Low
Off,
CC = Low
LED = Z
V
BAT
> 2V
V
BAT
2V
V
TS
> 0.25V
V
CC
V
TS
> 0.25V
V
CC
V
TS
< 0.25V
V
CC
V
BAT
> 2V or
V
TS
< 0.25V
V
CC
or
Maximum Time Out
T/ t or
Figure 2. bq2002D State Diagram
Chip on
V
CC
4.0V
Battery Voltage
too High?
( T/ t or
Maximum Time Out)
and TM = High
Battery
Temperature?
Charge
Pending
Fast
LED =
Low
Top-off
LED = Z
SD2002T.eps
V
BAT
< 2V
V
BAT
>
2V
0.25 V
CC
< V
TS
< 0.4 V
CC
Trickle
LED =
Low
Trickle
LED = Z
V
BAT
> 2V or
V
TS
< 0.225 V
CC
or
Maximum Time Out
V
BAT
> 2V or
V
TS
< 0.225 V
CC
or
(( T/ t or
Maximum Time Out)
and TM = High)
V
BAT
< 2V and
V
TS
< 0.
4 V
CC
and
V
TS
> 0.25 V
CC
V
BAT
> 2V
V
BAT
2V
V
TS
> 0.
4 V
CC
or
V
TS
< 0.25 V
CC
Figure 3. bq2002T State Diagram