U2402B
| Model | U2402B |
| Description | Fast Charge Controller for NiCd/NiMH Batteries |
| PDF file | Total 17 pages (File size: 318K) |
| Chip Manufacturer | TEMIC |
U2402B
Start
turn on
Power on reset
LED2 on
Charge stop
LED1 blinking
no
Cell
inserted ?
*)
yes
Cell insertion reset
Cell in
permissible
temperature
range ?
yes
Charging starts with
- dV monitoring
LED2 blinking
Cell insertion
yes
Cell in
permissible
temperature
range ?
no
LED1 on
LED2 off
no
V
Batt
v
4V
no
yes
– dV
switch off
no
no
Cell
inserted ?
*)
yes
yes
yes
– dV and d
2
V/dt
2
monitoring begins
yes
Cell in
permissible
temperature
range ?
yes
Charging
time reaches
5 min. ?
no
Cell
inserted ?
*)
no
*) 70 mV > V
Batt
< 5 V
no
– dV
disconnect ?
yes
LED1 on
LED2 on
no
d
2
V/dt
2
disconnect ?
yes
LED2 on
Top-off charging
with 1/4 I
O
no
Trickle charging
with 1/256 I
O
yes
93 7696 e
Cell
inserted ?
*)
no
yes
Timer 20 min exceeded
Figure 4. Flow chart
6 (17)
TELEFUNKEN Semiconductors
Rev. A3, 14-Nov-96
