■GENERAL DESCRIPTION
The XC6801 series is a constant-current/constant-voltage linear
charger IC for single cell lithium-ion batteries. The XC6801 includes a reference voltage source, battery voltage monitor,
driver transistor, constant-current/constant-voltage charge
circuit, overheat protection circuit and phase compensation circuit. The
battery charge termination voltage is internally set to 4.2V ±0.7% and the trickle charge voltage and accuracy is 2.9V ±3%. In trickle charge mode, a safe battery charge is possible because approximately only 1/10 of the full charge current is
supplied to the battery. As it is possible to select a highly accurate charge current of either 100mA (MAX.) for L level input to
the LIM pin or 500mA (MAX.) for H level, the series is ideal for applications where the charge is from USB. The series’ charge
status output pin, /CHG pin, is capable of checking the IC’s
charging state via connection to an external LED.
■ FEATURES
Operating Voltage Range : 4.25V ~ 6.0V
Charge Current (externally set) : 100mA (MAX.) @ LIM pin=L
500mA (MAX.) @ LIM pin=H
Charge Termination Voltage : 4.2V ±0.7%
Trickle Charge Voltage : 2.9V ±3%
Supply Current (Stand-by) : 12μA (TYP.)
Packages : SOT-89-5, SOT-25, USP-6C
Constant-current/constant-voltage operation
with thermal shutdown
Automatic recharge
Charge status output pin
Soft-start function (Inrush limit current)
■APPLICATIONS
● USB charge applications
● Charging docks, charging cradles
● MP3 players, portable audio players
● Cellular phones, PDAs
● Bluetooth headsets
