FAN5401 Fairchild Semiconductor, FAN5401 Datasheet - Page 21

• Manufacturer Part Number: FAN5401
• Description: The FAN5401 combines a highly integrated switched-mode charger, to minimize single-cell Lithium-ion (Li-ion) charging time from a USB power source, and a boost regulator to power a USB peripheral from the battery
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FAN5400 Family • Rev. 1.0.7
CHARGE STATE
Disable Charging
V
VBUS Fault
VBUS OK?
BAT
Indicate
< V
NO
NO
NO
SHORT
YES
YES
Enable IDET for T
Termination enabled
V
Indicate Charging
BAT
PWM Charging
Stop Charging
I
OUT
Timeout?
> V
T
YES
NO
15MIN
< I
Indicate Charging
OREG
Reset Safety reg
Enable I
TERM
–V
RCH
DETECT
SHORT
Figure 38. Charge Mode
,
Disable Charging
VBUS Fault
Indicate
YES
21
V
Indicate Charge
BAT
HIGHZ mode
Complete
< V
NO
OREG
–V
NO
Indicate timer fault
RCH
VBUS OK?
Timeout?
T
YES
YES
Set CE
15MIN
NO
YES
V
BAT
Battery Removed
< V
Reset charge
parameters
NO
OREG
–V
Configuration
RCH
Charge
State
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YES
Reset Safety reg
Delay t
INT