XC6802 Series
ETR2501-009
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 RSEN 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.
Charging docks, charging cradles
●
MP3 players, portable audio players
●
Cellular phones, PDAs
●
Bluetooth headsets
■ FEATURES
Operating Voltage Range
Charge Current
Charge Termination Voltage
Trickle Charge Voltage
Supply Current (Stand-by)
Function
Operating Ambient Temperature
Packages
Environmentally Friendly
■TYPICAL PERFORMANCE
CHARACTERISTICS
●Battery Charge Cycle
Li-ion Bat t e r C h ar ge C yc le
Li- io n BatteryyCharge Cycle
VIN=5.0V, CIN=1μF
VIN=5.0V, CIN=1uF
RSEN=2kΩ, 830mAh Battery
RSEN=2kohm, 830mAh Battery
700
4.40
Battery Voltage
Battery Voltage
Charge Current IBAT (mA)
600
Charge Current : IBAT (mA)
■TYPICAL APPLICATION CIRCUIT
: 4.25V ~ 6.0V
: Externally set up to 800mA (MAX.)
: 4.2V ±0.7%
: 2.9V ±3%
: 15μA (TYP.)
: Constant-current/constant-voltage Operation
Thermal Shutdown
Automatic Recharge
Charge Status Output Pin
Soft-start Function (Inrush Limit Current)
: -40℃~+85℃
: SOT-89-5, SOT-25, USP-6C, USP-6EL
: EU RoHS Compliant, Pb Free
4.20
500
4.00
400
3.80
300
3.60
Charge Current
Charge Current
200
3.40
100
0
0.00
Battery Voltage VBAT(V)
●
Battery Voltage : VBAT (V)
■APPLICATIONS
3.20
0.25
0.50
0.75
1.00
1.25
1.50
1.75
3.00
2.00
Time (hours)
Time (hour)
1/21