XC6801_15 Datasheet, PDF (1/19 Pages) Torex Semiconductor – 1 Cell Li-ion Battery Linear Charger IC

XC6801 Series
1 Cell Li-ion Battery Linear Charger IC
with Constant-Current/Constant-Voltage
ETR2502-004
■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 L_IM 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.
■APPLICATIONS
● USB charge applications
● Charging docks, charging cradles
● MP3 players, portable audio players
● Cellular phones, PDAs
● Bluetooth headsets
■ FEATURES
Operating Voltage Range : 4.25V ~ 6.0V
Charge Current
: 100mA (MAX.) @ L_IM pin=L
(externally set)
500mA (MAX.) @ L_IM pin=H
Charge Termination Voltage : 4.2V ±0.7%
Trickle Charge Voltage
: 2.9V ±3%
Supply Current (Stand-by) : 12μA (TYP.)
Operating Ambient Temperature : - 40℃~ + 85℃
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)
Environmentally Friendly : EU RoHS Compliant, Pb Free
■TYPICAL APPLICATION CIRCUIT
■TYPICAL PERFORMANCE
CHARACTERISTICS
●Battery Charge Cycle
1000
900
800
700
600
500
400
300
200
100
0
0
X C6 8 0 1 A4 2 1
V_IN=V_Lim=5V, C_IN=1.0μF
420mAh Battery
4.5
Battery Voltage
4.2
3.9
3.6
Charge Current(Lim:H)
3.3
3.0
0.3
0.6
0.9
1.2
1.5
Time (hour)
1/19