Data Sheet

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com
FAN5400 Family • Rev. 1.10 11
FAN5400 Family — USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator
Charge Mode Typical Characteristics
Unless otherwise specified, circuit of Figure 1, V
OREG
=4.2 V, V
BUS
=5.0 V, and T
A
=25°C.
-
20
40
60
80
100
120
140
160
180
2.5 3 3.5 4 4.5
Battery Charge Current (mA)
Battery Voltage, VBAT (V)
5.5VBUS
5.0VBUS
4.5VBUS
-
100
200
300
400
500
600
700
800
900
2.5 3 3.5 4 4.5
Battery Charge Current (mA)
Battery Voltage, VBAT (V)
5.5VBUS
5.0VBUS
4.5VBUS
Figure 7. Battery Charge Current vs. V
BUS
with
I
INLIM
=100 mA
Figure 8. Battery Charge Current vs. V
BUS
with
I
INLIM
=500 mA
84%
86%
88%
90%
92%
94%
550 650 750 850 950 1050 1150 1250
Efficiency
VBAT Load Current (mA)
4.20VBAT, 4.5VBUS
4.20VBAT, 5.0VBUS
3.54VBAT, 5.0VBUS
3.54VBAT, 4.5VBUS
84%
86%
88%
90%
92%
94%
2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3
Efficiency
Battery Voltage, VBAT (V)
4.5VBUS
5.0VBUS
5.5VBUS
Figure 9. Charger Efficiency, No I
INLIM
, I
OCHARGE
=1,250 mA
Figure 10. Charger Efficiency vs. V
BUS
, I
INLIM
=500 mA
Figure 11. Auto-Charge Startup at V
BUS
Plug-in,
I
INLIM
=100 mA, OTG=1, V
BAT
=3.4 V
Figure 12. Auto-Charge Startup at V
BUS
Plug-in,
I
INLIM
=500 mA, OTG=1, V
BAT
=3.4 V