FAN5400_11 Datasheet, PDF (21/37 Pages) Fairchild Semiconductor – FAN5400 / FAN5401 / FAN5402 / FAN5403 / FAN5404 / FAN5405 USB-Compliant Single-Cell Li-Ion Switching Charger

CHARGE STATE
V_BAT < V_SHORT
NO
VBUS OK?
YES
Disable Charging
Indicate
VBUS Fault
Enable I_SHORT ,
Reset Safety reg
Indicate Charging
YES
PWM Charging
Indicate Charging
NO
VBUS OK?
YES
T_15MIN
Timeout?
NO
Disable Charging
Indicate
VBUS Fault
T_15MIN
Timeout?
NO
YES
YES
Indicate timer fault
Set CE
NO
NO
Charge
Configuration
State
HIGHZ mode
NO
I_OUT < I_TERM
Termination enabled
V_BAT > V_OREG–V_RCH
Indicate Charge
Complete
V_BAT < V_OREG–V_RCH
YES
YES
Stop Charging
Enable IDET for T_DETECT
NO
V_BAT < V_OREG–V_RCH
YES
Reset Safety reg
Delay t_INT
Battery Removed
Reset charge
parameters
Figure 38. Charge Mode
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FAN5400 Family • Rev. 1.0.7
21
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