FAN54300 Datasheet, PDF (26/43 Pages) Fairchild Semiconductor – USB-Compliant, Dual-Power Input, Single-Cell, Li-Ion Switching Charger with USB-OTG Boost Regulator

VBUS Current Limiting
To minimize charging time without overloading VBUS’s
current limitations, the IC’s VBUS current limit can be
programmed with the IBUSLIM bits ( REG1[7:6] ).
The OTG pin establishes the VBUS current limit during
15-Minute Mode charging.
Operational Flow Charts
PWRIN POR
YES
HZ State
V_BAT > V_LOWV
YES
NO
HZ, CE# or
DISABLE Pin
set?
NO
HZ, CE# or
DISABLE Pin
set?
YES
HZ State
NO
T32Sec
Armed?
Charge
Configuration
State
NO
YES
T32Sec
Armed?
YES
Charge State
NO
Reset all registers
Start t_15MIN
Figu_Lr_oe _g48_ic. C_Mha_ar_sg_te_er _rPW_veR_rIN_siP_oO_nR Flow Chart
© 2010 Fairchild Semiconductor Corporation
FAN54300 • Rev. 1.0.4
26
www.fairchildsemi.com