SC824 Datasheet, PDF (8/29 Pages) Semtech Corporation – Single-cell Li-Ion Charger Tri-Mode with Timer and NTC

SC824
Typical Characteristics (continued)
I_PQ vs. R_IPRGM; I_FQ vs. R_IPRGM, USB Low Power Mode
V_VIN = 5V, V_BAT = 3.7V, T_A = 25^οC
200
160
120
80
40
0
2
6
10
14
18
22
26
30
R_IPRGM (kΩ)
Pre-Charging Battery Voltage and Current
700mAhr battery, R_IPRGM = 2.94kΩ, V_VIN = 5.0V, T_A = 25^οC
4
800
3.75
700
3.5
I_BAT
3.25
3
600
500
V_BAT
400
2.75
300
2.5
200
2.25
100
2
0
0
1
2
3
4
5
6
7
8
Time (s)
Re-Charge Cycle BAT Pin Voltage and Current
700mAhr battery, R_IPRGM = 2.94kΩ, V_VIN = 5.0V, Load = 10mA
4.25
500
4.15
400
V_BAT
4.05
300
3.95
200
I_BAT
3.85
100
3.75
0
5
6
7
8
9
10
11
12
13
Time (hrs)
Charging Cycle Battery Voltage and Current
700mAhr battery, R_IPRGM = 2.94kΩ, V_VIN = 5.0V, T_A = 25^οC, timer enabled
7
700
6
600
5
500
V_BAT
4
400
3
I_BAT
2
300
V_STAT1
200
1
100
0
0
0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 2.75
Time (hrs)
CC-to-CV Battery Voltage and Current
700mAhr battery, R_IPRGM = 2.94kΩ, V_VIN = 5.0V, T_A = 25^οC
4.22
760
4.205
V_BAT
730
4.19
4.175
700
I_BAT
670
4.16
640
4.145
610
30 30.5 31 31.5 32 32.5 33 33.5 34 34.5 35 35.5 36
Time (min)
USB Low-Power Re-Charge Cycle
700mAhr battery, R_IPRGM = 4.42kΩ, V_VIN = 5.0V, Load = 10mA
4.25
250
4.15
200
V_BAT
4.05
150
3.95
100
I_BAT
3.85
50
3.75
0
6
7
8
9
10
11
12
13
14
Time (hrs)
8