LTC3550-1 Linear Technology, LTC3550-1 Datasheet - Page 5

• Manufacturer Part Number: LTC3550-1
• Description: Dual Input USB/AC Adapter Li-Ion Battery Charger
• Manufacturer: Linear Technology

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TYPICAL PERFOR A CE CHARACTERISTICS
1.008
1.006
1.004
1.002
1.000
0.998
0.996
0.994
0.992
4.26
4.24
4.22
4.20
4.18
4.16
4.14
4.12
4.10
35
30
25
20
15
10
5
0
–50
0
0
Regulated Charger Output (Float)
Voltage vs Charge Current
IUSB Pin Voltage vs Temperature
(Constant-Current Mode)
⎯ P ⎯ W ⎯ R Pin I-V Curve
V
V
DCIN
DCIN
100 200 300
1
–25
= V
= V
USBIN
R
CHARGE CURRENT (mA)
USBIN
IDC
2
TEMPERATURE (°C)
0
= R
V
= 5V
V
USBIN
= 5V
USBIN
V
3
IUSB
PWR
400
25
= 2k
= 4.3V
(V)
= 8V
4
500 600 700
50
R
5
W
IDC
T
T
T
A
A
A
= 1.25k
= –40°C
75
= 25°C
= 90°C
6
3550-1 G01
3550-1 G04
3550-1 G07
U
800
100
7
4.220
4.215
4.210
4.205
4.200
4.195
4.190
4.185
4.180
900
800
700
600
500
400
300
200
100
35
30
25
20
15
10
0
5
0
–50
Charge Current vs IDC Pin Voltage
0
⎯ C ⎯ H ⎯ R ⎯ G Pin I-V Curve
Regulated Charger Output (Float)
Voltage vs Temperature
0
V
V
V
DCIN
DCIN
DCIN
0.2
1
–25
= V
= 5V
= V
USBIN
USBIN
2
TEMPERATURE (°C)
0.4
0
= 5V
= 5V
V
V
3
CHRG
IDC
0.6
25
(V)
4
(V)
0.8
50
R
5
R
IDC
R
IDC
T
IDC
T
T
A
A
A
= 1.25k
1.0
= –40°C
75
= 10k
= 25°C
= 90°C
= 2k
3550-1 G05
6
3550-1 G02
3550-1 G08
T
A
100
= 25°C, unless otherwise noted.
1.2
7
1.008
1.006
1.004
1.002
1.000
0.998
0.996
0.994
0.992
900
800
700
600
500
400
300
200
100
0
6
5
4
3
2
1
0
–50
IDC Pin Voltage vs Temperature
(Constant-Current Mode)
USBPWR Pin I-V Curve
0
0
Charge Current
vs IUSB Pin Voltage
V
V
V
DCIN
USBIN
USBIN
1
–25
0.2
= 5V
= 0V
= 5V
2
TEMPERATURE (°C)
0.4
0
LTC3550-1
V
V
V
DCIN
DCIN
USBPWR
V
3
IUSB
0.6
25
= 4.3V
= 8V
(V)
4
(V)
0.8
50
R
R
5
IUSB
R
IUSB
IUSB
T
T
A
T
1.0
A
A
75
= 1.25k
= – 40°C
= 10k
= 90°C
= 2k
= 25°C
6
3550-1 G06
3550-1 G03
3550-1 G09
35501f
5
100
1.2
7