Data Sheet

© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com
FAN5400 Family • Rev. 1.10 22
FAN5400 Family — USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator
Charge
Configuration
State
T32Sec
ARMED AND
CE# = 0?
Charge State
YES
NO
VBAT < VOREG
for 262ms?
NO
YES
NO
YES
START T15Min
Has T15Min
and CE# = 0
CE
CE
Figure 39. Charge Configuration
Stop T32Sec
HZ State
NO
Charge State
VBAT > VLOWV?
YES
YES
RUN
T32Sec
Reset T15min
if running
DISABLE
PIN
HIGH
LOW
LOW
HIGH
NO
HZ or CE# set?
CE
DISABLE
PIN
Figure 40. HZ-State