BQ25504 Datasheet, PDF (11/24 Pages) Texas Instruments – Ultra Low Power Boost Converter with Battery Management for Energy Harvester Applications

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bq25504
SLUSAH0 – OCTOBER 2011
80
V_IN = 0.2V
70
TYPICAL CHARACTERISTICS (continued)
1000
900
800
60
700
600
50
500
400
40
300
30
20
0.01
VSTOR = 3V
VSTOR = 1.8V
VSTOR = 5.5V
0.1
1
10
Input Current (mA)
Figure 12. Efficiency vs Input Current
100
G007
200
100
0
−60 −40 −20
VSTOR = 1.8V
VSTOR = 3V
VSTOR = 4V
0 20 40 60
Temperature (°C)
80 100 120
G008
Figure 13. VSTOR Quiescent Current vs Temperature
24
22
20
18
16
14
12
10
−50−40−30−20−10 0 10 20 30 40 50 60 70 80 90 100
Temperature (°C)
G009
Figure 14. Sample Period vs Temperature
400
350
300
250
200
150
−50−40−30−20−10 0 10 20 30 40 50 60 70 80 90 100
Temperature (°C)
G010
Figure 15. Settling Period vs Temperature
VIN = 1 V, RIN = 20 W, VBAT = 100 µF capacitor
VIN = 1 V, RIN = 20 W, VBAT = ramping power supply
Figure 16. Example of Startup with no Battery and
10 KΩ Load
Figure 17. Example of VBAT_OK Operation, Ramping
Battery From 0 V to 3.1 V
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