Maker : Orient Chip
Part No. : OCP8020

  Datasheet PDF : OCP8020.pdf
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Product Information

OCP8020 Standalone Linear Lithium Battery Charger General Description OCP8020 is a complete constant-current and constant-voltage linear charger for single cell lithium-ion and Lithium-Polymer batteries. Its SOT23-5L Package and low external component count make OCP8020 ideally suited for portable applications. Furthermore, the OCP8020 is specifically designed to work within USB power specification. At the same time, OCP8020 can also be used in the standalone lithium-ion and Lithium-polymer battery charger. No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature. The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor. The OCP8020 automatically terminates the charge cycle th the when the charge current drops to 1/10 programmed value after the final float voltage is reached. When the input supply (wall adapter or USB supply) is removed, the OCP8020 automatically enters a low current stage, dropping the battery drain current to less than 2µA. The OCP8020 can be put into shutdown mode, reducing the supply current to 25µA. Other features include charge current monitor, undervoltage lockout, automatic recharge and a status pin to indicate termination and the presence of an input voltage. Features Programmable Charge Current Up to 800mA No MOSFET, Sense Resistor or Blocking Diode Required Constant-Current/Constant-Voltage Operation with Thermal Protection to Maximize Charge Rate without Risk of Overheating Charges Single Cell Li-Ion Batteries Directly from USB Port Press 4.2V Charge Voltage with ± 1% Accuracy 25µA. Supply Current in Shutdown 2.9V Trickle Charge Threshold Available Without Trickle Charge Soft-Start Limits Inrush Current Available in 5-pin SOT23 Package on CHRG 1 GND 2 BAT 3 1x - ge C Block Diagram rid ro B 120℃ www.DataSheet4U.net TDIE TA ic CA + M SHDN C2 CHRG 1 STANDBY C3 + - + - Page1 - 5 + C1 TO BAT 2.9V 5 PROG 3µA fid en tia l Applications Pin Configuration (Top View) 5 PROG 4 VCC VCC 4 1000x MA 5µA + Cellular Telephones, PDA’s, MP3 Players Charging Docks and Cradles Bluetooth Applications 3 BAT R1 VA + - R2 - R3 1V R4 0.1V R5 REF 1.21V VCC 2 GND Rev. 1.0 Jul. 25, 2006 www.micro-bridge.com OCP8020 Standalone Linear Lithium Battery Charger Absolute Maximum Ratings (Note 1) Parameter Symbol Input Supply Voltage VCC PROG Voltage VPROG BAT Voltage VBAT CHRG Voltage VCHRG BAT Short-Circuit Duration BAT Pin Current IBAT PROG Pin Current IPROG TJ Maximum Junction Temperature TS Storage Temperature Lead Temperature(Soldering, 10sec) Note 1: Exceeding the absolute maximum rating may damage the device. Rating 10 VCC+0.3 7 10 Continuous 800 800 125 -65 to +125 300 Unit V V V V mA µA ℃ ℃ ℃ Operating Rating (Note 2) Electrical Characteristics (VIN=5V, VOUT=1.8V, TJ=25℃, Unless otherwise noted) Symbol VCC ICC VFLOAT Parameter Input Supply Voltage Input Supply Current Regulated Output (Float) Voltage BAT Pin Current C Conditions on Parameter Symbol Input Supply Voltage VIN TOP Operating Temperature Range Note 2: The device is not guaranteed to function outside its operating rating. fid en tia l Rating -0.3 to 10 -40 to +85 Min. 4.25 Typ. 190 85 25 4.2 110 500 4 ±1 ±1 12 2.9 3.4 170 Max. 6.5 1.25 1.2 100 30 0.1 0.1 Unit V ℃ rid Charge Mode(Note 3), RPROG=10K Standby Mode(Charge Terminated) Shutdown Mode (RPROG Not Connected, VCC＜VBAT, or VCC＜VUV) 0℃≤TJ≤85℃, IBAT=40mA Current Mode , RPROG=10K Current Mode , RPROG=2K Standby Mode, VBAT=4.2V Shutdown Mode(RPROG Not Connected) Sleep Mode, VCC=-0V VBAT＜VTRIKL, RPORG=10K RPROG=10K, VBAT Rising From VCC Low to High ge Unit V µA µA µA V mA mA µA µA µA mA V V mV V V mV mV mA/mA mA/mA IBAT www.DataSheet4U.net ITRIKL VTRIKL VUV VUVHYS VMSD VASD ITERM Tri...

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