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XC6802 Series
800mA 1 Cell Li-ion and Li-Po Battery Linear Charger IC
with Constant-Current/Constant-Voltage
■GENERAL DESCRIPTION
The XC6802 series is a constant-current/constant-voltage linear charger IC for single cell Lithium-ion and Lithium polymer
batteries. The XC6802 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 Lithium-ion and Lithium polymer battery charge is possible because approximately only 1/10 of the
full charge current is supplied to the battery.
With an external R
SEN
resistor, the charge current can be set freely up to 800mA (MAX.), therefore, the series is ideal for various
battery charge applications. The series’ charge status output pin, /CHG pin, is capable of checking the IC’s charging state
while connecting with an external LED.
■
PPLICATIONS
● Charging docks, charging cradles
● MP3 players, portable audio players
● Cellular phones, PDAs
● Bluetooth headsets
■ FEATURES
Operating Voltage Range : 4.25V ~ 6.0V
Charge Current : Externally set up to 800mA (MAX.)
Charge Termination Voltage : 4.2V ±0.7%
Trickle Charge Voltage : 2.9V ±3%
Supply Current (Stand-by) : 15μA (TYP.)
Function :
Constant-current/constant-voltage Operation
Thermal Shutdown
Automatic Recharge
Charge Status Output Pin
Soft-start Function (Inrush Limit Current)
Operating Ambient Temperature
: -40℃～+85℃
Packages :
SOT-89-5, SOT-25, USP-6C, USP-6EL
Environmentally Friendly : EU RoHS Compliant, Pb Free
■TYPICAL APPLICATION CIRCUIT
ETR2501-009
■TYPICAL PERFORMANCE
CHARACTERISTICS
●Battery Charge Cycle
Li-ion Battery Charge Cycle
0
100
200
300
400
500
600
700
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
Time (hours)
Charge Current I
BAT
(mA)
3.00
3.20
3.40
3.60
3.80
4.00
4.20
4.40
Battery Voltage V
BAT
(V)
VIN=5.0V, CIN=1uF
RSEN=2kohm
830mAh Batter
Charge Current
Battery Voltage
VIN=5.0V, CIN=1μF
RSEN=2kΩ, 830mAh Battery
Li-ion Battery Charge Cycle
Batter
Volta
e
Charge Current
Charge Current : I
BAT
(mA)
Battery Voltage : V
BAT
(V)
Time
hour
