Datasheet

R1
240 Ω
INPUT OUTPUT
ADJUST
LM317
V
O
= 15 V
V
I
D1
1N4002
R2
2.7 kΩ
C1
25 µF
R3
50 kΩ
2N2905
INPUT OUTPUT
ADJUST
LM317
V
I
24 Ω
R1
240 Ω
R2
2.4 kΩ
INPUT OUTPUT
ADJUST
LM317
V
I
R
S
0.2 Ω
(see Note A)
NOTE A: R
S
controls the output impedance of the charger.
The use of R
S
allows for low charging rates with a fully charged battery.
Z
OUT
+ R
S
ǒ
1 )
R2
R1
Ǔ
LM317
SLVS044V –SEPTEMBER 1997–REVISED FEBRUARY 2013 www.ti.com
Figure 8. Battery-Charger Circuit
Figure 9. 50-mA Constant-Current Battery-Charger Circuit
Figure 10. Slow Turn-On 15-V Regulator Circuit
10 Submit Documentation Feedback Copyright © 1997–2013, Texas Instruments Incorporated
Product Folder Links: LM317