ltc4078 Linear Technology Corporation, ltc4078 Datasheet - Page 5

• Manufacturer Part Number: ltc4078
• Description: Dual Input Li-ion Battery Charger With Overvoltage Protection
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
1000
900
800
700
600
500
400
300
200
100
800
750
700
650
600
550
500
60
55
50
45
40
35
30
25
20
0
–50
–10
–10
Charge Current
vs Ambient Temperature
DCIN Power FET On-Resistance
vs Temperature
USBIN Shutdown Current
vs Temperature
V
V
V
θ
V
I
BAT
DCIN
BAT
JA
ENABLE
BAT
= 30°C/W
10
–25
= 200mA
= 4V
= 4V
= V
R
R
10
IDC
IDC
= 0V
USBIN
30
= 1.24k
= R
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
0
IUSB
= 5V
30
50
V
= 2k
USBIN
25
70
50
= 5V
V
USBIN
50
90
= 4.3V
70
75
110
4078x G16
4078x G13
4078x G10
130
100
90
600
800
700
500
400
300
200
100
900
900
850
800
750
700
650
600
60
55
50
45
40
35
30
25
20
0
–50
–10
4.0
Charge Current
vs Supply Voltage
USBIN Power FET On-Resistance
vs Temperature
DCIN Shutdown Current
vs Temperature
V
V
I
BAT
ENABLE
BAT
4.5
= 200mA
–25
= 4V
10
= 5V
5.0
TEMPERATURE (°C)
TEMPERATURE (°C)
0
5.5
30
V
DCIN
6.0
25
V
(V)
V
DCIN
DCIN
50
6.5
50
= 4.3V
= 5V
R
V
θ
BAT
JA
7.0
IDC
= 30°C/W
70
= 1.24k
75
= 4V
7.5
4078x G17
4078x G11
4078x G14
T
A
100
= 25°C, unless otherwise specifi ed.
8.0
90
LTC4078/LTC4078X
1000
1000
800
600
400
200
980
960
940
920
900
880
860
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
0
–10
–50
2.4
Charge Current vs Battery Voltage
ENABLE Pin Threshold Voltage
(On-to-Off) vs Temperature
ENABLE Pin Pulldown Resistance
vs Temperature
V
R
θ
V
DCIN
JA
IDC
DCIN
= 30°C/W
2.7
= 1.24k
–25
= V
= V
10
USBIN
USBIN
3.0
TEMPERATURE (°C)
TEMPERATURE (°C)
0
= 5V
= 5V
30
3.3
V
BAT
25
(V)
3.6
50
50
3.9
70
75
4.2
4078x G12
4078x G15
4078x G18
4078xfb
5
4.5
100
90