LTC3550 Linear Technology, LTC3550 Datasheet - Page 6

• Manufacturer Part Number: LTC3550
• Description: Dual Input USB/AC Adapter Li-Ion Battery Charger
• Manufacturer: Linear Technology

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LTC3550
TYPICAL PERFOR A CE CHARACTERISTICS
6
1000
800
600
400
200
550
500
450
400
350
300
250
50
45
40
35
30
25
20
15
10
5
0
0
–50
–50
–50
DCIN Power FET On-Resistance
vs Temperature
Charge Current
vs Ambient Temperature
DCIN Shutdown Current
vs Temperature
V
V
θ
V
I
V
BAT
DCIN
BAT
JA
V
V
BAT
DCIN
–25
–25
DCIN
DCIN
–25
= 40°C/W
= 200mA
= 4V
= 4V
= V
R
= 4.3V
= 8V
= 5V
IDC
R
USBIN
IDC
0
THERMAL REGULATION
0
TEMPERATURE (°C)
TEMPERATURE (°C)
= R
TEMPERATURE (°C)
0
= 1.25k
IUSB
= 5V
25
25
= 2k
25
50
50
ONSET OF
50
75
75
ENABLE = 5V
W
75
100
100
3550 G16
3550 G10
3550 G13
U
125
125
100
800
750
700
650
600
550
500
450
400
350
900
800
700
600
500
400
300
45
40
35
30
25
20
15
10
5
0
–50
–50
4.0
Charge Current
vs DCIN Voltage
USBIN Power FET On-Resistance
vs Temperature
USBIN Shutdown Current
vs Temperature
V
I
R
V
θ
V
BAT
V
V
BAT
BAT
JA
USBIN
IDC
USBIN
USBIN
4.5
–25
–25
= 40°C/W
= 200mA
= 4V
= 1.25k
= 4V
= 4.3V
= 8V
= 5V
5.0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
0
5.5
25
V
THERMAL REGULATION
DCIN
6.0
25
50
(V)
6.5
50
75
ENABLE = 0V
ONSET OF
7.0
75
100
7.5
3550 G14
3550 G17
3550 G11
T
A
125
100
8.0
= 25°C, unless otherwise noted.
1000
900
850
800
750
700
650
600
900
850
800
750
700
650
600
800
600
400
200
0
–50
–50
2.4
Charge Current vs Battery Voltage
EN Pin Threshold Voltage
(On-to-Off) vs Temperature
HPWR Pin Threshold Voltage
(Rising) vs Temperature
V
V
DCIN
DCIN
2.7
–25
–25
= V
= V
USBIN
USBIN
3.0
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
= 5V
= 5V
V
θ
R
3.3
V
DCIN
JA
IDC
BAT
= 40°C/W
25
25
= 1.25k
= V
3.6
(V)
USBIN
50
50
3.9
= 5V
75
75
4.2
3550 G44
3550 G15
3550 G12
3550fa
100
100
4.5