Data Sheet

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com
FAN5400 Family • Rev. 1.10 20
FAN5400 Family — USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator
Flow Charts
VBUS POR
V
BAT
> V
LOWV
YES
Charge
Configuration
State
T15Min Timer?
NO
NO
YES
NO
Reset all registers
Start T
15MIN
NO
YES
HZ State
YES
Charge State
NO
YES
HZ State
NO
YES
T32Sec
Armed?
NO
YES
T32Sec
Armed?
HZ, CE# or
DISABLE Pin
set?
CE
HZ, CE# or
DISABLE Pin
set?
CE
HZ, CE# or
DISABLE Pin
set?
CE
Figure 37. Charger VBUS POR