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Número de pieza | XC6801 | |
Descripción | 1 Cell Li-ion Battery Linear Charger IC | |
Fabricantes | Torex | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de XC6801 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
No Preview Available ! 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
1 page 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 475mA(TYP.)or 95mA(TYP.)by the LIM pin.
LIM ”H” level input:475mA(TYP.)
LIM ”L” level input:95mA(TYP.)
<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
Series
TYPICAL PERFORMANCE CHARACTORISTICS (Continued)
(9()9V)VINI–N-VVBABTASTh間utdシowャnッVトoダltaウgeンv電s. 圧Am-bie周nt囲Te温m度pe特rat性ur例e
XC6801A421
((100))C充h電arg完e T了e検rm出ina時tio間n D-et周ect囲Ti温me度v特s. A性m例bient Temperature
XC6801A421
200
VIINN--VVBABTASTh間utdシowャnッVトoダltaウgeン(D電et圧ect()検出)
160 VIINN--VVBABTASTh間utdシowャnッVトoダltaウgeン(R電ele圧as(e解) 除)
2.5
2.0
VIN=5V
120 1.5
80 1.0
40 0.5
0
-50
-25 0
25 50 75
Ambient周Te囲m温pe度ra tuTrae(:℃T)a ( )
100
0.0
-50
-25 0
25 50 75
Ambien周t 囲Te温m度pe raTtau(r℃e: )Ta ( )
100
((1111))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
XC6801A421
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em温p度er aTtuar(e℃: T)a ( )
100
((1133))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p特era性tu例re
XC6801A421
220
200
180
160
140
120
100
80
-50
VIN=5V
-25 0
25 50 75
Ambien周t T囲em温p度er aTtuar(e℃: T)a ( )
100
((122))R再ec充ha電rgしe きThいre値sh電old圧Vo-lta周ge囲vs温. A度m特bie性nt例Temperature
XC6801A421
220
200
180
160
140
120
100
80
-50
VIN=5V
-25 0
25 50 75
Ambie周nt 囲Te温m度pe raTtau(r℃e:)Ta ( )
100
((14))ONN抵Re抗sist-an周ce囲vs温. A度m特bie性nt例Temperature
XC6801A421
VIN=4.15V, IBAT=100mA
1.0
0.8
0.6
0.4
0.2
0.0
-50
-25 0
25 50 75
Ambien周t 囲Te温m度pe raTtau(r℃e: )Ta ( )
100
11/18
11 Page |
Páginas | Total 18 Páginas | |
PDF Descargar | [ Datasheet XC6801.PDF ] |
Número de pieza | Descripción | Fabricantes |
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