Data Sheet

LT3652
22
3652fe
For more information www.linear.com/LT3652
TYPICAL APPLICATIONS
2-Cell Li-Ion Charger (8.3V at 2A) With 3 Hour Timer Termination Powered by
Inexpensive 12V at 1A Unregulated Wall Adapter; V
IN_REG
Loop Servos Maximum Charge
Current to Prevent AC Adapter Output from Drooping Lower than 12V
Basic 2A 1-Cell LiFePO
4
Charger (3.6V Float) With C/10 Termination
SW
V
IN
AC ADAPTER INPUT
12V AT 1A
SH-DC121000
V
IN_REG
V
FB
BOOST
SENSE
BAT
NTC
TIMER
MBRS340 D3
8.2µH
VISHAY
1HLP-2525CZ8R2M11
MBRS340
0.68µF
10k
626k
1µF
1N914
412k
SYSTEM
LOAD
R1 10k
B = 3380
REMOVABLE 2-CELL Li-Ion PACK
(8.3V FLOAT)
+
1µF
10µF
0.05
100µF
LT3652
10µF
SHDN
CHRG
FAULT
10k
51k
330k
47k
+
3652 TA02a
SW
V
IN
V
IN
5V TO 32V (40V MAX)
V
IN_REG
V
FB
BOOST
SENSE
BAT
NTC
TIMER
CMDSH2-4L
SYSTEM
LOAD
1µF
30k
223k
3652 TA03
+
10µF
C3
10µF
0.05
5.6µH
LT3652
SHDN
CHRG
FAULT
CMSH3-40MA
330k
LiFePO
4
CELL
OUTPUT CURRENT (A)
0
2
OUTPUT VOLTAGE (V)
6
10
14
20
0.4
0.8 1.2 1.4 1.6 1.8
1
18
4
8
12
16
0.2 0.6
3652 TA02b
SH-DC121000
AC Adapter V vs I Characteristics