Data Sheet

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com
FAN5400 Family • Rev. 1.10 21
FAN5400 Family — USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator
CHARGE STATE
YES
YES
Disable Charging
Indicate
VBUS Fault
NO
T
15MIN
Timeout?
NO
Enable I
SHORT
,
Reset Safety reg
Indicate Charging
PWM Charging
Indicate Charging
NO
YES
VBUS OK?
YES
Indicate timer fault
Set CE
HIGHZ mode
Indicate Charge
Complete
NO
V
BAT
< V
OREG
–V
RCH
NO
YES
VBUS OK?
Charge
Configuration
State
YES
NO
Disable Charging
Indicate
VBUS Fault
NO
YES
T
15MIN
Timeout?
NO
I
OUT
< I
TERM
Termination enabled
V
BAT
> V
OREG
–V
RCH
V
BAT
< V
SHORT
YES
Battery Removed
Reset charge
parameters
V
BAT
< V
OREG
–V
RCH
Reset Safety reg
Delay t
INT
Stop Charging
Enable IDET for T
DETECT
Figure 38. Charge Mode