XC6802 Datasheet, PDF (1/18 Pages) Torex Semiconductor – 1 Cell Li-ion Battery Linear Charger IC with Constant-Current/Constant-Voltage

XC6802 Series
1 Cell Li-ion Battery Linear Charger IC
with Constant-Current/Constant-Voltage
ETR2501-005b
˙GENERAL DESCRIPTION
The XC6802 series is a constant-current/constant-voltage linear charger IC for single cell lithium-ion batteries. The XC6802
includes a reference voltage source, battery voltage monitor, driver transistor, constant-current/constant-voltage charge circuit,
over heat protection circuit, 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 charge to a battery is possible
because approximately 1/10 out of setting charge current is supplied to the battery. With an external R_SEN 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
˔ç Charging docks, charging cradles
˔ç MP3 players, portable audio players
˔ç Cellular phones, PDAs
˔ç Bluetooth headsets
˙çFEATURES
Operating Voltage Range : 4.25V ~ 6.0V
Charge Current
: Externally set up to 800mA
(MAX.)
Charge Termination Voltage : 4.2V ʶ0.7%
Trickle Charge Voltage
: 2.9V ʶ3%
Supply Current (Stand-by) : 15ЖA (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
L^Li-^i-i^iooⁿn ^BB^aat^ttt^ee^rr^yy^CC^hh^aa^rgr g^ee^CC^yy^cc^lele
VIN=5.0V, CIN=1ЖF
VIN=5.0V, CIN=1uF
700
RS_RE_SN_EN=₌2₂k_kΩ_o,_hm8_,3₈0₃m_0mA_Ah_h B_Baa_tt_tt_ee_rr_yy _4.40
Bat^Bte^atr^ty^erV^yo^Vlt^oa^ltg^ae^ge
600
4.20
500
4.00
400
3.80
300
3.60
200
Ch^Ca^hrg^ae^rgeC^Cu^urr^re^renⁿt^t
3.40
100
3.20
0
3.00
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
Ti^Tmⁱe^m(^eho^(hu^or)^urs)
1/18