Data Sheet

LT3652
6
3652fe
For more information www.linear.com/LT3652
TYPICAL PERFORMANCE CHARACTERISTICS
Maximum Charge Current
(V
SENSE
–V
BAT
) vs Temperature
Thermal Foldback – Maximum
Charge Current (V
SENSE
–V
BAT
)
vs Temperature
CC/CV Charging; BAT Pin Bias
Current vs V
BAT
Battery Bias Current
with Charger Disabled
(I
BAT
+ I
SENSE
+ I
BOOST
+ I
SW
)
T
A
= 25°C, unless otherwise noted.
TEMPERATURE (°C)
–50
99.0
V
SENSE(DC)
(mV)
99.2
99.6
99.8
100.0
101.0
100.4
0
50
75
3652 G07
99.4
100.6
100.8
100.2
–25
25
100
125
V
FB
= 3V
TEMPERATURE (°C)
0
V
SENSE(DC)
(mV)
40
80
20
60
100
120
45 65 85 105 125
35 13525 55 75 95 115
3652 G08
V
BAT
(V)
0
–0.4
I
BAT
(mA)
0.0
0.4
0.8
2.2
1.6
1
2
2.5
2.0
1.2
–0.2
0.2
0.6
1.0
1.8
1.4
0.5 1.5
3
3652 G10
V
BAT(FLT)
V
IN_REG
(V)
2.65
V
SENSE(DC)
(mV)
0
20
80
60
40
2.67
2.69
2.7
3652 G09
100
2.66 2.68
2.722.71
2.73 2.74 2.75
V
BAT(FLT)
(V)
0 2
0
I
RFB
(µA)
8
6
10
12
16
3652 G11
4
2
64 8 10 12 14
TIME (MINUTES)
0
EFFICIENCY (%)
CHARGE CURRENT (A); POWER LOSS (W)
0
0.5
2.0
2.5
1.5
1.0
40
80
100
3652 G12
3.0
35
45
75
65
55
95
85
20 60
140120
160 180 200
CHARGE
CURRENT
EFFICIENCY
POWER
LOSS
V
IN
= 20V
Maximum Charge Current
(V
SENSE
–V
BAT
) vs V
IN_REG
Voltage
V
FLOAT
Programming Resistor
Current vs V
FLOAT
for 2-Resistor
Network
Charge Current, Efficiency, and
Power Loss vs Time
(I
CHG(MAX)
= 2A; V
FLOAT
= 8.2V)
Charger Efficiency vs Battery
Voltage (I
CHG
= 2A)
V
BAT
(V)
70
EFFICIENCY
(%)
76
80
82
84
86
88
74
72
78
90
5 7 9 11 13
4 14 153 6 8 10 12
3652 G13
V
IN
= 20V WITH INPUT BLOCKING DIODE
V
BAT
(V)
0
BATTERY CURRENT (µA)
0
6
4
2
12
14
10
8
4
8
10
3652 G11
16
2 6
1412
16
V
IN
FLOATING
V
IN
= 20V; V
SHDN
= 0V