LTC1479 LINER [Linear Technology], LTC1479 Datasheet - Page 17

• Manufacturer Part Number: LTC1479
• Description: PowerPath Controller for Dual Battery Systems
• Manufacturer: LINER [Linear Technology]

APPLICATIONS
the charging battery through one of the N-channel switch
pairs, SW G or SW H. The charging battery voltage is
simultaneously connected through the CHGMON switch
in the LTC1479 to the top of the charger voltage resistor
divider, R4 and R5, for constant voltage charging. (See the
LT1510 data sheet for further detail.)
BATTERY
BATTERY
4 Li-ION
4 Li-ION
BATTERY
BATTERY
4 Li-ION
4 Li-ION
PACK
PACK
BAT1
BAT2
MANAGEMENT
PACK
PACK
BAT1
BAT2
MANAGEMENT
POWER
POWER
Figure 11. Interfacing to the LT1511 Constant-Voltage/Constant-Current Battery Charger with Input Current Limiting
*COILTRONICS CTX33-2
P
+
–
+
–
P
–
+
+
–
TO SW C/D
TO SW E/F
TO SW C/D
TO SW E/F
+
+
+
+
C
47 F
C
47 F
BAT1
BAT2
U
C
47 F
C
47 F
Si9926DY
BAT1
BAT2
Figure 10. Interfacing to the LT1510 Constant-Voltage/Constant-Current Battery Charger
Si9926DY
SW G
SW G
INFORMATION
BAT1
U
BAT1
Si9926DY
Si9926DY
SW H
SW H
BAT2 GG SG GH SH
W
BAT2 GG SG GH SH
LTC1479
LTC1479
CURRENT CONTROL
MANAGEMENT P
CURRENT CONTROL
CHGMON
U
FROM POWER
MANAGEMENT P
FROM POWER
CHGMON
DCIN
DCIN
Q1
2N7002
R
4.93k
1%
1 F
PROG
R
11k
1%
Q1
2N7002
C1
330
PROG
0.1 F
LT1511 Battery Charger Interface
The LT1511, 3A CC/CV battery charger with input current
limiting, is connected in a slightly different manner than
the LT1510 as illustrated in Figure 11.
SW A/B
0.1 F
330
R1
500
TO
R1
100k
1%
SW A/B
(CHARGER OUTPUT)
TO
R2
1k
C4
10 F
CERAMIC
C2
0.33 F
R2
300
CERAMIC
C1
1 F
10 F
(CHARGER OUTPUT)
C6
+
C3
200pF
R3
1k
C2
0.1 F
200
C5
10 F
R
1%
S2
PROG
V
COMP1
GND
+
CLN
BAT
C
PROG
V
GND
C
LT1511
0.033
0.05
LT1510
R
C12
1 F
V
R
C
22 F
TANT
+
S4
CC
V
BAT
S1
CHG
CC
BOOST
SENSE
BOOST
SENSE
OVP
CLP
SPIN
OVP
SW
D1
MBRS140T
C
22 F
TANT
UV
SW
R
200
1%
CHG
R3
500
MBRS340T
S3
D1
D3
MBR0540T
C6
0.47 F
D3
1N4148
C3
0.22 F
R4
5k
R5
6.8k
20 H
LTC1479
C7
50pF
L1
DC INPUT
(FROM AC
ADAPTOR)
DC INPUT
(FROM AC
ADAPTOR)
MBRS340T
L1*
33 H
MBRS140T
0.25%
0.25%
D2
0.25%
0.25%
649k
115k
D2
649k
115k
17
R6
R7
R4
R5
1479 F11
1479 F10