AAT3681 Datasheet, PDF (5/15 Pages) Advanced Analogic Technologies – USB Port or AC Adapter Lithium-Ion/Polymer Battery Charger

AAT3681
USB Port or AC Adapter
Lithium-Ion/Polymer Battery Charger
Typical Characteristics
Constant Charging Current
vs. Set Resistor Values
1000
100
10
1
1
10
100
1000
R_SET (kΩ)
Charging Current vs. Battery Voltage
(AAT3681 Only)
350
R_SET = 5.36kΩ
300
250
R_SET = 8.06kΩ
200
150
R_SET = 16.2kΩ
100
50
R_SET = 31.6kΩ
0
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3
V_BAT (V)
Charging Current vs. Battery Voltage
(AAT3681-1 Only)
600
R_SET = 3.24K
500
400
R_SET = 5.36K
300
200 ^{RSET = 8.06K}
100 ^{RSET = 16.2K}
0 ^{RSET = 31.6K}
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3
V_BAT (V)
End of Charge Battery Voltage
vs. Supply Voltage
4.206
4.204
4.202
R_SET = 8.06kΩ
4.200
4.198
R_SET = 31.6kΩ
4.196
4.194
4.5 4.75 5
5.25 5.5 5.75 6
V_IN (V)
6.25 6.5
End of Charge Voltage Regulation
vs. Temperature
(R_SET = 8.06kΩ)
4.23
4.22
4.21
4.20
4.19
4.18
4.17
-50
-25
0
25
50
75
100
Temperature (°C)
Constant Charging Current vs.
Supply Voltage
(R_SET = 8.06kΩ)
220
210
V_BAT = 3.3V
200
190
V_BAT = 3.6V
180
V_BAT = 4V
170
4
4.25 4.5 4.75 5 5.25 5.5 5.75 6
V_IN (V)
6.25 6.5
3681.2007.01.1.2
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