LP4068B5F

Preliminary Datasheet LP4068 800mA Single Chip Li-Ion and Li-Polymer Charger General Description Features The LP4068 is a complete constant-current/ constant  Input Voltage up to 28V voltage linear charger for single cell lithium-ion battery.  Input Over Voltage Protection：6.5V Its SOT23-5 package and low external component  Short-circuit protection count make the LP4068 ideally suited for portable  Programmable Charge Current up to 800mA applications. No external sense resistor is needed,  1µA Battery Reverse Current and no blocking diode is required due to the internal  Protection of Reverse Connection of Battery MOSFET architecture. Thermal feedback regulates  No MOSFET, Sense Resistor or Blocking Diode the charge current to limit the die temperature during high power operation or high ambient temperature. Required  Constant-Current/Constant-Voltage Operation The charge voltage is fixed at 4.2V, and the charge with Thermal Regulation to Maximize Charge current can be ISET programmed externally with a Rate Without Risk of Overheating single resistor.  SOT23-5 Package The LP4068 automatically terminates the charge cycle  RoHS Compliant and 100% Lead (Pb)-Free when the charge current drops to 1/10 setting current value after the final float voltage is reached. Applications When the input supply is removed, the LP4068  Portable Media Players/Game automatically enters a low current state, dropping the  Power Bank battery drain current to less than 1µA.  Bluetooth Applications  PDA/MID Other features include charge current monitor, under voltage lockout, automatic recharge and a status pin. Marking Information Device Order Information LP4068 LP4068B5F Marking LP4068 YWX Package Shipping SOT23-5 3K/REEL Marking indication: F: Pb-Free Y:Production year W:Production week X: Series Number Package Type B5: SOT23-5 LP4068-00 Jan.-2019 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 7 Preliminary Datasheet LP4068 Functional Pin Description Pin Configurations Package Type LP4068B6F SOT23-5 CHRG 1 GND 2 BAT 3 5 ISET 4 VIN SOT23-5 TOP VIEW Pin Description No. NAME DESCRIPTION Open-Drain Charge Status Output. When the battery is charging, the CHRG pin is 1 CHRG pulled low by an internal NMOS. When the charge cycle is completed, the pin could be pulled High by an external pull high resistor. 2 GND GND is the connection to system ground. BAT is the connection to the battery. Typically a 10µF Tantalum capacitor is needed 3 BAT for stability when there is no battery attached. When a battery is attached, only a 1uF ceramic capacitor is required. 4 VIN VIN is the input power source. Connect to a wall adapter. Charge Current Program. The charge current is programmed by connecting a 1% 5 LP4068-00 ISET Jan.-2019 resistor(RISET) to ground. Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 2 of 7 Preliminary Datasheet LP4068 Typical Application Circuit LP4068 VIN 4 VIN BAT Battery 3 CIN 10uF 1K 5 ISET CHRG 1 LED1 RISET 3.4K GND COV 10uF 2 Function Block Diagram BAT VIN R1 CHRG Control Logic R2 GND ISET LP4068-00 Jan.-2019 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 3 of 7 Preliminary Datasheet LP4068 Absolute Maximum Ratings Note 1  Input Voltage to GND ---------------------------------------------------------------------------------------- -0.3V to 28V  BAT Voltage GND ---------------------------------------------------------------------------------------------- - 5V to 15V  Other pin to GND -------------------------------------------------------------------------------------------- -0.3V to 6.5V  Maximum Junction Temperature ---------------------------------------------------------------------------------- 125℃  Maximum Soldering Temperature (at leads, 10 sec) --------------------------------------------------------- 260℃  Operating Junction Temperature Range (TJ) -------------------------------------------------------- -20℃ to 85℃  Storage Temperature ------------------------------------------------------------------------------------ -65℃ to 165℃ Thermal Information  Maximum Power Dissipation ( PD,TA=25°C) --------------------------------------------------------------------- 0.6W  Thermal Resistance (θJA) ---------------------------------------------------------------------------------------- 200℃/W ESD Susceptibility  HBM(Human Body Mode) --------------------------------------------------------------------------------------------- 2KV  MM(Machine Mode) ---------------------------------------------------------------------------------------------------- 200V Note 1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. LP4068-00 Jan.-2019 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 4 of 7 Preliminary Datasheet LP4068 Electrical Characteristics (TA=25°C, VIN =5V, unless otherwise noted.) SYMBOL PARAMETER VIN Input Voltage IIN Input Supply Current IBAT=4.2V VFLOAT Regulated Output (Float) Voltage IBAT=40mA, VUV VIN Under Voltage Lockout Threshold From VIN Low to High 3.5 V VOVP Input Voltage OVP VIN Rising 6.5 V VOVP_HYS OVP Hysteresis 150 mV RISET=3.4k, Current Mode 500 mA RISET=17k, Current Mode 100 mA VBAT=4.2V（ VIN=float or 0V） 1 uA IBAT CONDITIONS BAT Pin Current MIN TYP. MAX UNITS 4.5 5 6 V 80 4.158 4.2 uA 4.242 V ITRIKL Trickle Charge Current VBATVBAT+VDT), but is less supplied to the battery. When the BAT pin approaches the than OVP (VIN