BQ24180 Datasheet, PDF (13/39 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and Accessory Power Connection

bq24180
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SLUSA02 A – FEBRUARY 2010 – REVISED FEBRUARY 2010
TYPICAL CHARACTERISTICS (continued)
V_VBUS = 0 V to 5.5 V to 0 V
V_VBUS
2 V/div
I_DRV
10 mA/div
V_DRV
2 V/div
V_DRV
5.1 V Offset
10 mV/div
t -Time - 2 ms/div
Figure 21. DRV Startup/Shutdown
t -Time - 20 ms/div
Figure 22. DRV Load Transient
5.15
5.13
V_BUS = 5.5 V
100
V_VBUS = 5 V
90
80
70
V_OUT = 3.5 V
5.11
60
V_OUT = 4.45 V
50
5.09
40
30
5.07
20
10
5.05
0
1234 5678
I_DRV - mA
Figure 23. DRV Load Regulation
9 10
0
0.01
0.1
1
10
Current - A
Figure 24. Charger Efficiency
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