XC6802 Series ETR2501-010 800mA 1 Cell Li-ion and Li-Po Battery Linear Charger IC with Constant-Current/Constant-Voltage GENERAL DESCRIPTION The XC6802 series is a constant-current/constant-voltage linear charger IC for single cell Lithium-ion and Lithium polymer batteries.The XC6802 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 Lithium-ion and Lithium polymer battery charge is possible because approximately only 1/10 of the full 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 ICs charging state while connecting with an external LED. FEATURES APPLICATIONS Operating Voltage Range : 4.25V ~ 6.0V Charging docks, charging cradles Charge Current : Externally set up to 800mA (MAX.) MP3 players, portable audio players Charge Termination Voltage : 4.2V 0.7% Cellular phones, PDAs Trickle Charge Voltage : 2.9V 3% Bluetooth headsets Supply Current (Stand-by) : 15A (TYP.) Function : Constant-current/constant-voltage Operation Thermal Shutdown Automatic Recharge Charge Status Output Pin Soft-start Function (Inrush Limit Current) Operating Ambient Temperature : -40+85 Packages : SOT-89-5, SOT-25, USP-6C, USP-6EL Environmentally Friendly : EU RoHS Compliant, Pb Free TYPICAL PERFORMANCE TYPICAL APPLICATION CIRCUIT CHARACTERISTICS Battery Charge Cycle Li-ion Battery Charge Cycle Li-ion Battery Charge Cycle VIN=5.0V, CIN=1 F VIN=5.0V, CIN=1uF RSEN=2k , 830mAh Battery RSEN=2kohm, 830mAh Battery 700 4.40 Battery Voltage Battery Voltage 600 4.20 500 4.00 400 3.80 300 3.60 200 Charge Current 3.40 Charge Current 100 3.20 0 3.00 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 Time (hours) Time (hour) 1/21 Charge Current : I (mA) BAT Charge Current IBAT (mA) Battery Voltage VBAT(V) Battery Voltage : V (V) BAT XC6802 Series PIN CONFIGURATION * The dissipation pad for the USP-6C / USP-6EL package should be solder-plated in recommended mount pattern and metal masking so as to enhance mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected to the V (No. 2) pin. SS PIN ASSIGNMENT PIN NUMBER PIN NAME FUNCTIONS USP-6EL SOT-25 SOT-89-5 USP-6C 3 1 5 3 /CHG Charge Status Output Pin 2 2 2 2 V Ground SS 1 3 4 1 BAT Charge Current Output Pin 6 4 3 6 V Input Voltage Pin IN 4 5 1 4 ISEN Charge Current Setup Pin 5 - - 5 NC No Connection FUNCTIONS XC6802A42X PIN NAME CONDITIONS IC OPERATION H Level (1.4VVSENVIN) or Open OFF (Shutdown Mode) I SEN Pull-down by external components ON, Charge Current I =1000 / R * BAT SEN * For SOT-25, SOT-89-5, and USP-6C, charge current should be set to become I 800mA. BAT For USP-6EL, charge current should be set to become I 500mA. BAT PRODUCT CLASSIFICATION Ordering Information XC6802A42X- DESIGNATOR ITEM SYMBOL DESCRIPTION SOT-89-5 (1,000pcs/Reel) PR SOT-89-5 (1,000pcs/Reel) PR-G SOT-25 (3,000pcs/Reel) MR (*1) SOT-25 (3,000pcs/Reel) Packages (Order Unit) MR-G - USP-6C (3,000pcs/Reel) ER USP-6C (3,000pcs/Reel) ER-G 4R-G USP-6EL (3,000pcs/Reel) (*1) The -G suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant. 2/21