XC6801 查看數據表（PDF） - TOREX SEMICONDUCTOR

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XC6801

1 Cell Li-ion Battery Linear Charger IC with Constant-Current/Constant-Voltage

TOREX SEMICONDUCTOR 

XC6801 Series

1 Cell Li-ion Battery Linear Charger IC

with Constant-Current/Constant-Voltage

ETR2502-003a

■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.

■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.) @ LIM pin=L

(externally set)

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)

■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

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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