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PDF XC6801 Data sheet ( Hoja de datos )

Número de pieza XC6801
Descripción 1 Cell Li-ion Battery Linear Charger IC
Fabricantes Torex 
Logotipo Torex Logotipo



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XC6801 Series
1 Cell Li-ion Battery Linear Charger IC
with Constant-Current/Constant-Voltage
ETR2502-003a
GENERAL DESCRIPTION
The XC6801 series is a const ant-current/constant-voltage linear char ger IC for singl e cell lithium-ion bat teries. 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 ch arge voltage and accuracy is 2. 9V 3%. In trickle ch arge mode, a safe b attery charge is p ossible
because a pproximately o nly 1/10 of the fu ll charge curre nt is suppl ied to the b attery. As it is possible to s elect a hig hly
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
(exter nally set)
500mA (MAX.) @ LIM pin=H
Charge Termination Voltage : 4.2V 0.7%
Trickle Charge Voltage
: 2.9V 3%
Supply Current (Stand-by) : 12 A (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
Battery Voltage
4.5
4.2
3.9
Charge Current(Lim:H)
3.6
3.3
3.0
0.3 0.6 0.9 1.2 1.5
Time (hour)
1/18 http://www.Datasheet4U.com

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XC6801 pdf
XC6801
Series
OPERATIONAL DESCRIPTION
Charge Cycle
(Charge Main Routine)
Trickle Charge
Constant-Current Charge (CC)
Constant-Voltage Charge (CV)
VLIM-“H” IBAT IBAT1/10
VLIM-“L” IBAT IBAT1/10
Maintaining the charge state
during a charge termination
detect time (1ms)
Charge Termination
(Stand-by mode)
Failure Detection
Input Voltage Monitor (UVLO)
Shut-Down
VIN-BAT Voltage Monitor (UVLO)
Shut-Down
Charge Cycle
Charge Cycle
Maintaining the stand-by mode
during a recharge time (2ms)
<Charge Cycle>
If the BAT pin voltage is less than 2.9V, the charger enters trickle charge mode. In this mode, a safe battery charge is possible
because approximately only 1/10 of the charge current is supplied to the battery. When the BAT pin voltage rises above 2.9V,
the charger enters constant-current mode (CC mode) a nd the batter y is charged by the programmed charge current. When
the BAT pin voltage reaches 4.2V, the charger enters constant-voltage mode (CV mode) a utomatically. After this, the char ge
current starts to drop and when it reaches a level which is 1/10 of the programmed charge current, the charge terminates.
<Setting Charge Current>
The charge current can be set from 475mATYP.or 95mATYP.by the LIM pin.
LIM ”H” level input475mATYP.
LIM ”L” level input95mATYP.
<Charge Termination>
The batter y c harge is termi nated when the charg e curr ent decreas es to 1/10 of the ful l char ging l evel af ter the battery pi n
voltage reaches a float voltage. An internal comparator monitors the ISEN pin voltage to detect the charge termination. When
the comparator sees that the ISEN pin voltage is less than 1.2ms (charge termination detect time), the IC enters stand-by mode.
A driver transistor turns off during the stand-by mode.
<Automatic Recharge>
In st and-by m ode battery vo ltage fal ls. W hen the vo ltage level at the b attery p in dr ops to 4.05V or l ess, the char ge c ycle
automatically re-start after a delay of 1.7ms. As such, no external activation control is needed.
5/18

5 Page





XC6801 arduino
XC6801
Series
TYPICAL PERFORMANCE CHARACTORISTICS (Continued)
(9)9V)VININ-VVBABTASThutdownVoltagevs. Am-bientTemperature
XC6801A421
(100)Charge Termination D-etectTimevs. Ambient Temperature
XC6801A421
200
VIINN--VVBABTASThutdownVoltage(Detect)検出)
160 VIINN--VVBABTASThutdownVoltage(Release) 除)
2.5
2.0
VIN=5V
120 1.5
80 1.0
40 0.5
0
-50
-25 0
25 50 75
AmbientTempera tuTrae:Ta ( )
100
0.0
-50
-25 0
25 50 75
Ambient Tempe raTtaure: Ta ( )
100
(1111)RechargeTime-vs. Ambient Temperature
XC6801A421
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-50
VIN=5V
-25 0
25 50 75
Ambient Temper aTtuare: Ta ( )
100
(1133)Soft StartTimevs. Am-bient Temperature
XC6801A421
220
200
180
160
140
120
100
80
-50
VIN=5V
-25 0
25 50 75
Ambient Temper aTtuare: Ta ( )
100
(122)Recharge ThresholdVo-ltagevs. AmbientTemperature
XC6801A421
220
200
180
160
140
120
100
80
-50
VIN=5V
-25 0
25 50 75
Ambient Tempe raTtaure:Ta ( )
100
(14)ONN抵Resist-ancevs. AmbientTemperature
XC6801A421
VIN=4.15V, IBAT=100mA
1.0
0.8
0.6
0.4
0.2
0.0
-50
-25 0
25 50 75
Ambient Tempe raTtaure: Ta ( )
100
11/18

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