BQ24079 Datasheet, PDF (11/39 Pages) Texas Instruments – 1.5A USB-FRIENDLY Li-Ion BATTERY CHARGER AND POWER-PATH MANAGEMENT IC

bq24072, bq24073
bq24074, bq24075, bq24079
www.ti.com................................................................................................................................................. SLUS810D – SEPTEMBER 2008 – REVISED JUNE 2009
TYPICAL CHARACTERISTICS (continued)
V_IN = 6V, EN1=1, EN2=0, bq24073 application circuit, T_A = 25°C, unless otherwise noted.
bq24072/ 73/ 75/ 79
OVERVOLTAGE PROTECTION
THRESHOLD
vs
TEMPERATURE
6.70
6.6 V
6.65
V_I Rising
6.60
6.55
6.50
V_I Falling
6.45
0
25
50
75
100 125
T_J - Junction Temperature - °C
Figure 19.
FASTCHARGE CURRENT
vs
BATTERY VOLTAGE
1.05
R_ISET = 900 W
1.03
1.01
0.99
0.97
0.95
3
3.2 3.4 ^3.6 3.8
4 4.2
V_BAT - Battery Voltage - V
Figure 22.
bq24074
OVERVOLTAGE PROTECTION
THRESHOLD
vs
TEMPERATURE
10.70
10.65
10.5 V
10.60
10.55
V_I Rising
10.50
10.45
10.40
V_I Falling
10.35
10.30
10.25
10.20
0
25
50
75
100 125
T_J - Junction Temperature - °C
Figure 20.
FASTCHARGE CURRENT
vs
BATTERY VOLTAGE
310
R_ISET = 3 kW
305
300
295
290
285
280
3 3.2 3.4 3.6 3.8 4 4.2
V_BAT - Battery Voltage - V
Figure 23.
PRECHARGE CURRENT
vs
BATTERY VOLTAGE
31.5
R_ISET = 3 kW
31
30.5
bq24074
INPUT CURRENT LIMIT
vs
INPUT VOLTAGE
800
RILIM
700
600
500
USB500
400
300
200
100
0
5
USB100
6
7
8
9
10
V_I - Input Voltage - V
Figure 21.
PRECHARGE CURRENT
vs
BATTERY VOLTAGE
105
104
R_ISET = 900 W
103
102
101
100
99
98
97
96
95
2
2.2
2.4
2.6
2.8
3
V_BAT - Battery Voltage - V
Figure 24.
30
29.5
29
28.5
2
2.2 2.4
2.6
2.8
3
V_BAT - Battery Voltage - V
Figure 25.
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