ACT8740
Rev PrB, 25-Feb-08
SINGLE-CELL Li+ BATTERY CHARGER (CHGR)
TYPICAL PERFORMANCE CHARACTERISTICS
(ACT8740QLEGA, VVIN = 5V, TA = 25°C, unless otherwise specified.)
Charge Termination Voltage
Trickle-Charge Threshold
4.210
4.208
4.206
4.204
4.202
4.200
3.0
2.9
VBAT RISING
2.8
2.7
2.6
2.5
VBAT FALLING
4.198
4.196
4.194
4.192
4.190
0
10
20
30
40
50
60
70
0
10
20
40
50
60
30
70
Temperature (°C)
Temperature (°C)
SUSPEND Mode Battery Current
CHGLEV Drive Current Threshold
5
6
3
LOGIC HIGH INPUT
4
3
2
1
0
VIN = GA
VIN FLOATING
FLOATING INPUT
0
VVIN = 5V
-3
-6
LOGIC LOW INPUT
20 40
0
10
20
30
40
50
60
70
-20
0
60
-40
85
Temperature (°C)
Temperature (°C)
MOSFET Resistance
Maximum Charge Current
350
300
600
500
CHGLEV = VSYS
250
200
150
100
50
400
300
200
CHARGE CURRENT LIMITED
BY THERMAL CONTROL CIRCUITRY
CHGLEV = GA
100
0
0
-40
0
10
20
30
40
50
60
70
-25
5
35
65
95
125
Temperature (°C)
Temperature (°C)
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