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PDF XC6802 Data sheet ( Hoja de datos )
| Número de pieza | XC6802 | |
| Descripción | 1 Cell Li-ion Battery Linear Charger IC | |
| Fabricantes | Torex | |
| Logotipo |  |
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XC6802 Series
1 Cell Li-ion Battery Linear Charger IC
with Constant-Current/Constant-Voltage
ETR2501-005b
GENERAL DESCRIPTION
The XC6802 series is a const ant-current/constant-voltage linear charger IC for single cel l lithium-ion batteries. The XC6802
includes a reference voltage source, battery voltage monitor, driver transistor, constant-current/constant-voltage charge circuit,
over heat protection circ uit, phase com pensation circuit. The battery charge termination voltage is int ernally set to 4.2V
0.7% and the trickle charge voltage and accuracy is 2.9V 3%. In trickle charge mode, a safe charge to a battery is possible
because approximately 1/10 out of setting 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.
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
: Externally set up to 800mA
(MAX.)
Charge Termination Voltage : 4.2V 0.7%
Trickle Charge Voltage
: 2.9V 3%
Supply Current (Stand-by) : 15 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
LLi-i-iioonn BBaatttteerryyCChhaargr geeCCyycclele
VIN=5.0V, CIN=1 F
700 RSRESNEN==22kkΩo,hVm8I3,N80=35m0.m0AVAh,hCBBINaa=ttt1teeurrFyy 4.40
BatBteatrtyeVryoVltoaltgaege
600 4.20
500 4.00
400 3.80
300 3.60
200 ChCahrgaergeCCuurrrerenntt 3.40
100 3.20
0
0.00
0.25
0.50
0.75 1.00 1.25
TiTmiem(eho(huor)urs)
1.50
1.75
3.00
2.00
1/18 http://www.Datasheet4U.com
1 page  
OPERATIONAL EXPLANATION
XC6802
Series
<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 which was set by the ISEN pin, is supplied to the battery. When the BAT
pin volt age rises above 2.9V , the charger enters const ant-current mode (CC m ode) and the batter y is charged by t he
programmed charge current. When the BAT pin voltage reaches 4.2V, the charger enters constant-voltage mode (CV mode)
automatically. After this, the charge 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 by connecting a resistor between the ISEN pin and the VSS pin. The battery charge current, IBAT,
is 1000 times the current out of the ISEN pin. Therefore, the charge current, IBAT, is calculated by the following equations:
IBAT = (VISEN / RSEN) x 1000 (VISEN = 1.0V: Current sense pin voltage)
However IBAT 800mA
<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 monitors the ISEN pin voltage is less than 100mV (charge termination detect) for 1ms (charge termination detect
time), the IC e nters stand-by mode. A driver transistor turns off during the st and-by mode. In this state, a failure d etection
circuit and a monitoring circuit of the battery pin voltage operates and supply current is reduced to 10 A.
<Automatic Recharge>
In stand- by m ode battery vo ltage fal ls. When th e vo ltage lev el at the battery pi n dr ops to 4.0 5V or less, the c harge c ycle
automatically re-starts after a delay of 2ms. As such, no external activation control is needed.
5/18
5 Page 
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
XC6802
Series
(9（)9U）UVLVOLOV電olta圧ge-vs周. A囲m温bie度nt特Te性m例perature
XC6802A42X
3.95
3.85
3.75
3.65
3.55
3.45
3.35
-50
UVLLOO電Vo圧lta（ge検(D出e）tect)
UVLLOO電Vo圧lta（ge解(R除e）lease)
-25 0
25 50 75
Ambient周T囲em温pe度ra tTuare（:℃T）a ( )
100
(（1100)）VIINN–-VVBBAATTS間huシtdャoッwトn ダVoウltaンg電e v圧s. -Am周b囲ie温nt 度Te特m性pe例rature
XC6802A42X
200
VIINN-V-BVABT ASThu間tdシowャnッVトolダtagウeン(D電ete圧ct（) 検出）
160 VIINN-V-BVABT ASThu間tdシowャnッVトolダtagウeン(R電ele圧as（e解) 除）
120
80
40
0
-50
-25 0
25 50 75
Ambient周Te囲m温pe度ra tTuare（:℃T）a ( )
100
(1（1)1C）充har電ge完T了erm検in出ati時on間De-te周ct T囲im温e 度vs特. A性mb例ient Temperature (（1122)）R再ec充ha電rge時T間ime-v周s. 囲Am温bi度en特t T性em例perature
XC6802A42X
XC6802A42X
VIN=5V
2.5
2.0
1.5
1.0
0.5
0.0
-50
-25 0
25 50 75
Ambient周Te囲m温pe度ra tuTrae（:℃T）a ( )
100
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-50
VIN=5V
-25 0
25 50 75
Ambien周t T囲e温mp度e raTtua（re℃: T）a ( )
100
(1（31)3R）再ech充ar電geしTきhrいes値ho電ld V圧olt-ag周e 囲vs.温Am度b特ien性t T例emperature
XC6802A42X
220
200
180
160
140
120
100
80
-50
VIN=5V
-25 0
25 50 75
Ambient周T囲em温pe度ra tTuare（:℃T）a ( )
100
(（1144) ）Sソofフt SトtaスrtタTーimトe 時vs.間Am-b周ien囲t T温em度pe特ra性tur例e
XC6802A42X
220
200
180
160
140
120
100
80
-50
VIN=5V
-25 0
255 07 5
Ambien周t T囲em温p度er aTtuar（e℃: T）a ( )
100
11/18
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet XC6802.PDF ] | |
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