BQ24140_14 Datasheet, PDF (12/39 Pages) Texas Instruments – Integrated Dual-Input Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support

bq24140
SLUSAO5 – OCTOBER 2011
0.95
0.93
0.91
Efficiency 325
Efficiency 550
Efficiency 950
0.89
0.87
Efficiency 1250
0.85
0.83
0.81
0.79
0.77
0.75
2
2.5
3
3.5
4
4.5
VBAT - Battery Voltage - V
Figure 7. VBUS Efficiency versus Battery Voltage
0.95
VBAT at 4.2 V _{VBAT at 4 V}
0.93
VBAT at 3.6 V
0.91
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
ICHG - Charge Current - A
1.2
1.4
Figure 8. VBUS Efficiency versus Charge Current
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