lt3651-4.2 Linear Technology Corporation, lt3651-4.2 Datasheet - Page 18

• Manufacturer Part Number: lt3651-4.2
• Description: Monolithic 4a High Voltage Li-ion Battery Charger Features
• Manufacturer: Linear Technology Corporation

LT3651-4.2
7.5V to 32V 4A Charger with Approximately Constant Input Power
Typical applicaTions

V
V
IN
IN
7.5V to 32V 4A Charger with High Voltage Current Foldback
20k
SBM540
SBM540
SMAZ24
6.2V
12V to 32V 4A Charger with Low Voltage Current Foldback
18.2V
54.9k
120k
R
180k
180k
68k
5.1k
T
8.2V
SMAZ9V1
9.1V
R
54.9k
R
54.9k
T
SHDN
ACPR
FAULT
CHRG
RT
TIMER
CLP
I
T
LIM
1µF
0.1µF
R
1k
LT3651-4.2
SHDN
ACPR
FAULT
CHRG
RT
TIMER
IL
RNG/SS GND
CLP
I
SHDN
ACPR
FAULT
CHRG
RT
TIMER
LIM
CLP
I
LIM
CLN
Using the RNG/SS Pin
22k
LT3651-4.2
R
50m
LT3651-4.2
RNG/SS GND
SENSE
RNG/SS GND
BOOST
SENSE
CLN
V
BAT
NTC
SW
CLN
IN
BOOST
SENSE
BOOST
SENSE
V
NTC
BAT
V
SW
IN
NTC
BAT
IN
SW
1N5819
C
22µF
1µF
IN
SBM540
1N5819
1N5819
1µF
1µF
R
24m
3.3µH
C
22µF
SENSE
C
100µF
C
22µF
IN
BAT
V
IN
IN
R
24m
3.3µH
R
24m
3.3µH
SENSE
C
100µF
TO
SYSTEM
LOAD
SENSE
C
100µF
+
TO
SYSTEM
LOAD
BAT
BAT
365142 TA02a
BATTERY
+
+
365142 TA03a
365142 TA05a
BATTERY
BATTERY
25
24
23
22
21
20
19
18
17
16
15
5
3
2
0
4
5
4
3
2
1
0
10
Maximum Charge Current vs V
5
Maximum Charge Current vs V
5
10
10
15
Input Power vs V
15
15
20
V
V
V
IN
IN
IN
20
20
(V)
(V)
(V)
25
25
25
IN
30
30
30
365142 TA05b
3651 TA03b
3651 TA02b
IN
IN
35
35
35
365142f