BQ24140_14 Datasheet, PDF (13/39 Pages) Texas Instruments – Integrated Dual-Input Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support

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0.95
Efficiency 325
Efficiency 550
0.93
Efficiency 950
0.91
0.89
0.87
0.85
Efficiency 1.55
0.83
0.81
0.79
0.77
0.75
2
0.95
0.93
0.91
2.5
3
3.5
4
4.5
VBAT - Battery Voltage - V
Figure 9. VIN Efficiency versus Battery Voltage
VBAT at 4.2 V _{VBAT at 4 V}
VBAT at 3.6 V
0.89
0.87
VBAT at 3 V
0.85
VBAT at 2.5 V
0.83
0.81
0.79
0.77
0.75
0
0.2
0.4
0.6
0.8
1
1.2
1.4
ICHG - Charge Current - A
Figure 10. VIN Efficiency versus Charge Current
bq24140
SLUSAO5 – OCTOBER 2011
5
1.6
Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s): bq24140
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