BQ25505 Datasheet, PDF (14/34 Pages) Texas Instruments – Ultra Low Power Boost Charger with Battery Management and Autonomous Power

bq25505
SLUSBJ3B – AUGUST 2013 – REVISED JANUARY 2014
100
90
V_IN = 0.2 V
80
70
60
50
40
VSTOR = 3.0 V
30
VSTOR = 2.0 V
VSTOR = 5.5 V
20
0.0
0.1
1.0
10.0
100.0
Input Current (mA)
Figure 12. Charger Efficiency vs Input Current
250
TA = -40C, VBAT_PRI = 2V
TA = -40C, VBAT_PRI = 5.5V
TA = 25C, VBAT_PRI = 2V
200
TA = 25C, VBAT_PRI = 5.5V
TA = 85C, VBAT_PRI = 2V
TA = 85C, VBAT_PRI = 5.5V
150
100
50
0
2
2.5
3
3.5
4
4.5
5
5.5
VBAT_SEC Voltage (V)
Figure 14. Quiescent Current vs VBAT_SEC Voltage: Ship
Mode
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1400
1200
1000
800
TA = -40C, VBAT_PRI = 2V
TA = -40C, VBAT_PRI = 5.5V
TA = 25C, VBAT_PRI = 2V
TA = 25C, VBAT_PRI = 5.5V
TA = 85C, VBAT_PRI = 2V
TA = 85C, VBAT_PRI = 5.5V
600
400
200
0
2
2.5
3
3.5
4
4.5
5
5.5
VBAT_SEC Voltage (V)
Figure 13. Quiescent Current vs VBAT_SEC Voltage: Active
Mode
35
TA = 85C, VBAT_SEC = 2V
30
TA = 85C, VBAT_SEC = 5.5V
25 TA = 25C, VBAT_SEC = 5.5V
20
15
TA = 25C, VBAT_SEC = 2V
10
TA = -40C, VBAT_SEC = 2V
5
TA = -40C, VBAT_SEC = 5.5V
0
-5
2
3
4
5
6
VBAT_PRI Voltage (V)
Figure 15. VBAT_PRI Leakage Current vs VBAT_PRI
Voltage
Figure 16. Startup by Taking EN Low (from Ship mode)
Figure 17. MPPT Operation
14
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