LC6020CS8TR

LC6020 1A Standalone Linear Li-Ion Battery Charge DESCRIPTION FEATURES The LC6020 is a single cell, fully integrated constant current (CC)/constant voltage (CV) Li-ion battery charger. Its compact package with minimum external components requirement makes the LC6020 ideal for portable applications.    No external sense resistor or blocking diode is necessary for the LC6020. Build-in thermal feedback mechanism regulates the charge current to control the die temperature during high power operation or at elevated ambient temperature.   The LC6020 has a pre-charge function for trickle charging deeply discharged batteries. The fast charge current can be programmed by an external resistor. CV regulation mode is automatically enabled once the battery’s charging curve reaches the constant voltage portion. The output current then decays and is finally terminated once the charge current drops to 1/10 of the programmed value. The LC6020 keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops by 150mV below the CV value.         Standalone Capability with no Requirement of External MOSFET, Sense Resistor or Blocking Diode. Complete Linear Charger in Compact Package for Single Cell Lithium-Ion Batteries Programmable Pre-charge, Fast Charge and Termination Current. Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating Charges Single Cell Li-Ion Batteries Directly from USB Port Preset 4.2V Charge Voltage with 1% Accuracy Automatic Recharge Charge Status Output Pin C/10 Charge Termination 25A Supply Current in Shutdown 2.9V Trickle Charge Threshold Soft-Start Limits Inrush Current Available in ESOP8 Package APPLICATIONS Power supply state is constantly monitored and the battery drain current is reduced to minimum value automatically when the LC6020 senses a lack of input power. In its shutdown mode, the LC6020 can reduce the supply current to less than 25μA. A status pin outputs a logic HIGH/LOW to indicate the charging status and the presence of power supply.    Cellular Telephones, PDAs, MP3 Players Charging Docks and Cradles Bluetooth Applications Other features include charge current monitor, under-voltage lockout. TYPICAL APPLICATION www.leadchip.com.cn 1 Your final power solution LC6020 ORDERING INFORMATION LC6020 □ 1□ 2□ 3 Code □ 1 □ 3 Product Classification Description LC6020CS8TR ESOP-8 B3:Product code Temperature&Rohs: C:-40~85C ,Pb Free Rohs Std. Package type: S8:ESOP8 Packing type: TR:Tape&Reel (Standard) NC LL: Lot No. B3 LLXYW X: Fab code YW: Date code PROG GND VCC NC B3 LLXYW □ 2 PIN CONFIGURATION CHRG STDBY BAT Note：Y: The Year of manufacturing,”1” stands for year 2011,”2” stands for year 2012,and “8” stands for year 2018. W: The week of manufacturing. ”A” stands for week 1,”Z” stands for week 26,” A ” stands for week 27,” Z ” stands for week 52. BLOCK DIGRAM www.leadchip.com.cn 2 Your final power solution LC6020 PIN DESCRIPTION PROG (Pin2): Program, Monitor the charge current and Shutdown. This pin set to 1V in constant-current mode. The charge current is programmed by connecting a 1% resistor, RPROG, to GND pin. The charge current can be calculated using the following formula: VCC (Pin4): Positive Input Supply. Needs to be bypassed with at least a 1μF capacitor. When input voltage drops to within 80mV of the BAT pin voltage, the LC6020 switches to shutdown mode. BAT (Pin5): Charge Current Output. This pin provides charge current to the battery and regulates the final float voltage to 4.2V which is set by an internal precision resistor divider. I BAT  (VPROG / RPROG ) 1000 The PROG pin can also be used to switch the charger to shutdown mode by disconnecting the program resistor from ground. This result in a 3μA current to pull the PROG pin to a high level shutdown threshold voltage, thus stop the charging and reduce the supply current to 25μA. This pin is also clamped to approximately 2.4V. A higher voltage beyond this value will draw currents as high as 1.5mA. Device normal operation can be resumed by reconnecting the RPROG resistor to ground. STDBY (Pin6): Open-Drain Charge Status Output. The STDBY pin outputs low when the battery is full. ̅̅̅̅̅̅̅̅ (Pin7): Open-Drain Charge Status Output. The ̅̅̅̅̅̅̅̅ pin outputs low when the battery is charging. When the LC6020 detects an under voltage lockout condition, ̅̅̅̅̅̅̅̅ is forced high impedance. GND (Pin3): Ground. ABSOLUTE MAXIMUM RATING Parameter Value VCC PROG BAT ̅̅̅̅̅̅̅̅ –0.3V to 6V – 0.3V to VCC + 0.3V –0.3V to 5V –0.3V to 6V Continuous 5mA 125°C –40°C to 85°C –40°C to 125°C 260°C BAT short-circuit duration PROG pin current Maximum junction temperature Operating ambient temperature range Storage temperature range Lead temperature (soldering, 10 sec) Note: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect device reliability. www.leadchip.com.cn 3 Your final power solution LC6020 ELECTRICAL CHARACTERISTICS VCC=5V, TA=25°C, RPROG=10K, unless otherwise noted. SYMBOL VCC ICC PARAMETER CONDITIONS MIN TYP MAX UNITS Input supply voltage Input supply current VFLOAT Regulated output (float) voltage IBAT BAT pin current ITRIKL VTRIKL VTRHYS VUV VUVHYS Trickle charge current Trickle charge threshold voltage Trickle charge hysteresis voltage VCC under voltage lockout threshold VCC under voltage lockout hysteresis VMSD Manual shutdown threshold voltage VASD VCC–VBAT lockout threshold voltage ITERM 4.25 Charge mode (note 1) Standby mode (charge terminated) Shutdown mode (RPROG not connected, VCC