FAN54300 Datasheet, PDF (14/43 Pages) Fairchild Semiconductor – USB-Compliant, Dual-Power Input, Single-Cell, Li-Ion Switching Charger with USB-OTG Boost Regulator

VBUS Charge Mode Typical Characteristics
Unless otherwise specified, circuit of Figure 1, VOREG=4.2 V, VBUS=5.0 V, and TA=25°C.
180
160
4.5 VBUS
5.0 VBUS
5.5 VBUS
140
120
100
80
60
2.7
2.9
3.1
3.3
3.5
3.7
3.9
4.1
4.3
Battery Voltage VBAT (V)
Figure 8. Battery Charge Current vs. VBUS with
IINLIM=100 mA
1,000
900
800
4.5 VBUS
5.0 VBUS
5.5 VBUS
700
600
500
400
2.7
2.9
3.1
3.3
3.5
3.7
3.9
4.1
4.3
Battery Voltage VBAT (V)
Figure 9. Battery Charge Current vs. VBUS with
IINLIM=500 mA
94
4.6VBUS, 4.00VBAT
5.0VBUS, 4.20VBAT
92
4.5VBUS, 3.54VBAT
5.0VBUS, 3.54VBAT
90
88
86
84
82
550
650
750
850
950
1050
1150
1250
Battery Charge Current IBAT (mA)
Figure 10. Charger Efficiency, No IINLIM, IOCHARGE=1250 mA
93
91
89
87
85
4.5VBUS
5.0VBUS
5.5VBUS
83
2.7
2.9
3.1
3.3
3.5
3.7
3.9
4.1
4.3
Battery Voltage VBAT (V))
Figure 11. Charger Efficiency vs. VBUS, IINLIM=500 mA
© 2010 Fairchild Semiconductor Corporation
FAN54300 • Rev. 1.0.4
14
www.fairchildsemi.com