Datasheet

19
LTC1479
APPLICATIONS INFORMATION
WUU
U
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
C
OSC
RUN/SS
I
TH
SFB
SGND
V
OSENSE
SENSE
+
SENSE
–
TG
BOOST
SW
V
IN
INTV
CC
BG
PGND
V
CC
LTC1435
+
1
2
3
45
6
7
8
SENSE
I
OUT
GND
NIN PIN
V
CC
PROG
AVG
LT1620
+
SHDN
I
PROG
DC INPUT
(FROM AC
ADAPTER)
TO
W A/B
330Ω
+
R1
1M
0.1%
R2
76.8k
0.1%
C1
100pF
0.1µF
C2
100pF
C3 
0.1µF
R5
1.5M
R5, 1k
C4
0.033µF
C6
0.1µF
C5
0.01µF
C8
0.1µF
C9, 100pF
C10
100pF
C7
0.33µF
R3
10k
1%
C11
56pF
C12
0.1µF
D1*
CMDSH-3
C13
0.33µF
D2*
CMDSH-3
Q1
Si4412DY
Q2
Si4412DY
L1
27µH
C15
22µF
35V
×2
R4
0.025Ω
C14
4.7µF
C16
22µF
35V
1479 F12
SW H
Si9926DY
SW G
Si9926DY
BAT1
4 Li-ION
BATTERY
PACK
BAT2
4 Li-ION
BATTERY
PACK
+
+
C
BAT1
10µF
C
BAT2
10µF
+
–
TO SW C/D
TO SW E/F
+
–
POWER
MANAGEMENT
µP
BAT1 BAT2 GG SG GH SH
CHGMON
DCIN
LTC1479
*CENTRAL SEMICONDUCTOR CO. [phone]
Figure 12. Interfacing to an LT1620/LTC1435 High Efficiency Constant-Voltage/Constant-Current Battery Charger