Datasheet

LTC4110
50
4110fb
TYPICAL APPLICATIONS
Dual Battery Backup System Managers Controlling a Two Three-Series Cell Li-Ion, Gas Gauge Smart
Batteries with Calibration Managed by Host Processor and SMBus Multiplexer
DCIN
INID
CLN CLP DCDIV THA V
REF
10k NTC
SMB2
SMB1 SMB2
SMB1
0.1µF LOW ESR
20µF VERY LOW ESR
BATTERY IDEAL DIODE
INPUT
IDEAL DIODE
TO BACKUP LOAD
SELC
SDA SCL TYPE
DCOUT
NC
BATID
CHGFET DCHFET
I
SENSE
CSP
CSN
BAT
I
TH
ACPDLY
TIMER
V
DD
ACPb
GP101 GP102 GP103
SHDN
GND SGND
20µF
VERY
LOW ESR
+ + +
SMB2
4110 TA06
LTC4110
0.1µF
LOW
ESR
0.1µF LOW ESR
THB
R
THA
1.13k
R
THB
54.9k
DCIN
INID
CLN CLP DCDIV THA V
REF
10k NTC
BATTERY 2 (12.6V)
10.8V
3 CELL
10.8V
3 CELL
BATTERY 1 (12.6V)
0.1µF LOW ESR
20µF VERY LOW ESR
BATTERY IDEAL DIODE
INPUT
IDEAL DIODE
TO SYSTEM LOAD
SELC
SDA SCL TYPE
DCOUT
SUPPLY
INPUT
(12V)
NC
BATID
CHGFET DCHFET
I
SENSE
CSP
CSN
BAT
I
TH
ACPDLY
TIMER
V
DD
ACPb
GP101 GP102 GP103
SHDN
GND SGND
20µF
VERY
LOW ESR
+ + +
SMB1
SMBUS
MULTIPLEXOR
HOST
I
2
C/SMBus
LTC4305
LTC4110
0.1µF
LOW
ESR
0.1µF LOW ESR
THB
R
THA
1.13k
R
THB
54.9k
V
CHG
V
CAL
V
DIS
I
CHG
I
CAL
I
PCC
SELA
1.21k
113k
8.66k
R
CL
0.02
1W
0.1µF
7HR CHARGE TIME HIGH CURRENT BACKUP LOAD DESIGN 0.5A BACKDRIVE CURRENT CUTOFF 1A CHARGE AND CALIBRATION CURRENT 0.2A WAKE-UP/PRECONDITIONING CURRENT ALL RESISTORS ARE 1% UNLESS NOTED OTHERWISE SEE LTC4305 DATA SHEET FOR PULL-UP INFORMATION Q1, Q2: Si7216DN Q3, Q4: Si7445DP Q5, Q6: Si7983DP T1, T2: BH510-1019
Q3
37.4k
36.5k
187k
V
CHG
V
CAL
V
DIS
I
CHG
I
CAL
I
PCC
SELA
113k
0.1µF
37.4k
36.5k
187k
R
SNS(FET)
0.05 0.5W 33 0.5W 5%
33
0.5W
5%
R
SL
3.32k
3.01k
0.1µF 68nF
1k2k
330nF
1nF1nF
1k2k
330nF
R
SNS(BAT)
0.1 0.25W
Q5
Q1A
Q1B
R
SL
3.32k
3.01k
0.1µF
1k2k
330nF
1k2k
330nF
Q6
R
SNS(FET)
0.05 0.5W 33 0.5W 5%
33
0.5W
5%
R
SL
3.32k
3.01k
0.1µF 68nF
1k2k
330nF
1nF1nF
1k2k
330nF
R
SNS(BAT)
0.1 0.25W
Q2A
Q2B
Q4
T2T1