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XC6801 Datasheet, PDF (1/18 Pages) Torex Semiconductor – 1 Cell Li-ion Battery Linear Charger IC with Constant-Current/Constant-Voltage | |||
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XC6801 Series
1 Cell Li-ion Battery Linear Charger IC
with Constant-Current/Constant-Voltage
ETR2502-003a
ËGENERAL 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 ʶ
0.7% and the trickle charge voltage and accuracy is 2.9V ʶ3%. 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 seriesâ charge status output pin, /CHG pin, is capable of checking the ICâs
charging state via connection to an external LED.
ËAPPLICATIONS
Ëç USB charge applications
Ëç Charging docks, charging cradles
Ëç MP3 players, portable audio players
Ëç Cellular phones, PDAs
Ëç Bluetooth headsets
ËçFEATURES
Operating Voltage Range : 4.25V ~ 6.0V
Charge Current
: 100mA (MAX.) @ LIM pin=L
(externally set)
500mA (MAX.) @ LIM pin=H
Charge Termination Voltage : 4.2V ʶ0.7%
Trickle Charge Voltage
: 2.9V ʶ3%
Supply Current (Stand-by) : 12ÐA (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)
ËTYPICAL APPLICATION CIRCUIT
ËTYPICAL PERFORMANCE
CHARACTERISTICS
ËBattery Charge Cycle
1000
900
800
700
600
500
400
300
200
100
0
0
X C6 8 0 1 A4 2 1
VIN=VLim=5V, CIN=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)
1/18
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