USB Port Lithium-Ion/Polymer Battery Charger
Typical Characteristics
Fast Charge Current vs. Temperature
(USBH; USBH = 8.06kΩ)
Ω
540
530
520
510
500
400
600
AAT3688
Charging Current vs. Battery Voltage
(USBH; USBH = 8.06kΩ)
I
CH
(mA)
I
CH
(A)
500
490
480
470
460
450
440
-50
-25
0
25
50
75
100
300
200
100
0
2.5
3
3.5
4
4.5
Temperature (°C)
Battery Voltage (V)
Charging Current vs. Battery Voltage
(USBL; USBL = 40.2kΩ)
Ω
120
100
80
60
40
20
0
2.5
3
3.5
4
4.5
Fast Charge Current vs. Supply Voltage
(USBH; USBH = 8.06kΩ)
Ω
600
V
BAT
= 3.5V
500
V
BAT
= 3.3V
I
CH
(mA)
I
CH
(mA)
400
V
BAT
= 3.9V
300
200
100
0
4
4.25
4.5
4.75
5
5.25
5.5
5.75
6
Battery Voltage (V)
Supply Voltage (V)
Fast Charge Current vs. Supply Voltage
(USBL; USBL = 40.2kΩ)
Ω
120
Fast Charge Current vs. Supply Voltage
(USBH; USBH = 8.06kΩ)
Ω
600
V
BAT
= 3.5V
100
500
0°C
400
V
BAT
= 3.9V
80
I
CH
(mA)
I
CH
(mA)
70°C
25°C
60
40
20
0
4
4.5
V
BAT
= 3.3V
300
200
100
0
4.40
5
5.5
6
6.5
4.50
4.60
4.70
4.80
4.90
5.00
Supply Voltage (V)
Supply Voltage (V)
3688.2006.10.1.5
7
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
