LP28056SSPF-43

Preliminary Datasheet LP28056 1.2A Single-chip Li-ion and Li-POL Charge with Protection of Reverse Connection of Battery Features General Description The LP28056 is a complete constant-current/ constant- voltage linear charger for single cell lithium-ion batteries. Its ESOP-8 package and low external component count make the LP28056 ideally suited for portable applications. 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/4.35V, and the charge current can be ISET rammed externally with a single resistor. The LP28056 automatically terminates the charge cycle when the charge current drops to 1/10th the ISET rammed value after the final float voltage is reached. When the input supply is removed, the LP28056 automatically enters a low current state, dropping the battery drain current to less than 1µA. The LP28056 can be put into shutdown mode, reducing the supply current to 1µA. Other features include charge current monitor, under voltage lockout, automatic recharge and a status pin to indicate charge termination and the presence of an input voltage. Order Information             Very Low Power Dissipation Short-circuit protection Protection of Reverse Connection of Battery Programmable Charge Current Up to 1200mA No MOSFET, Sense Resistor or Blocking Diode Required Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating 1µA Supply Current in Shutdown Drainage Charge Current Thermal Regulation Status Outputs for LED or System Interface Indicates Charge and Full Optional Battery Temperature Monitoring Before and During Charge Automatic Sleep Mode for Low-Power Consumption Available in ESOP-8 Package RoHS Compliant and 100% Lead (Pb)-Free Typical Application Circuit VIN LP28056SPF 4 LP28056 □ □ □ □ □ □ 6 7 Default: 4.2V 43: 4.3V 10uF 3 VIN BAT STAT2 ISET 5 2 BATTERY STAT1 VSS 10uF Rset 1K PGND 9 F: Pb-Free Package Type SP: ESOP-8 Default: Iset=1000 Applications     Portable Media Players/MP3 players Cellular and Smart mobile phone PDA/DSC Bluetooth Applications LP28056 – 03 Apr.-2019 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 8 Preliminary Datasheet LP28056 Functional Pin Description Package Type P i n C o n fi g u ra ti o n s ESOP-8 NC 1 ISET 2 VSS 3 VIN 4 PGND 9 8 NC 7 STAT1 6 STAT2 5 BAT Pin Description PIN 1 PIN DESCRIPTION Number NC No Connector. Charge Current Program, Charge Current Monitor and Shutdown Pin. The charge current is 2 ISET programmed by connecting a 1% resistor(RPROG)to ground. When charging in constant-current mode, this pin servos to 1V. In all modes, the voltage on this pin can be used to measure the charge current using the following formula: ISET=1000/RPROG 3 VSS VSS is the connection to system ground. 4 VIN VIN is the input power source. Connect to a wall adapter. BAT is the connection to the battery. Typically a 10µF Tantalum capacitor is needed for stability 5 BAT when there is no battery attached. When a battery is attached, only a 0.1µF ceramic capacitor is required. Open-Drain Charge Status Output. When the battery is charging, the STAT pin could be pulled 6 STAT2 High by an external pull high resistor. When the charge cycle is completed, the pin is pulled Low by an internal N-channel MOSFET. Open-Drain Charge Status Output. When the battery is charging, the STAT pin is pulled low by 7 STAT1 an internal N-channel MOSFET. When the charge cycle is completed, the pin could be pulled High by an external pull high resistor. 8 NC 9 PGND LP28056 – 03 No Connector. ground. Apr.-2019 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 2 of 8 Preliminary Datasheet LP28056 Function Block Diagram 4 145℃ TDIE TA VIN 1X 1200X - NC TTEMP BAT 5μA + MA 5 R1 1 TTEMP VA CA - + 45%VIN + - R2 SCHMITT 6 STAT2 SHDN C1 - REF 1.22V + R3 1V R4 7 STAT1 C2 C3 + 0.1V - R5 + - TO BAT 3μA VCC 2.9V 2 ISET VSS 3 Absolute Maximum Ratings Note 1  Input to GND(VIN) -------------------------------------------------------------------------------------------------------------------- -0.3V to 8V  BAT to GND ------------------------------------------------------------------------------------------------------------------------------ -5V to 6V  VIN to BAT ----------------------------------------------------------------------------------------------------------------------------------------- 8V  Other Pin to GND --------------------------------------------------------------------------------------------------------------------- -0.3V to 6V  BAT Short-circuit Duration-------------------------------------------------------------------------------------------------------------Continuous  Maximum Junction Temperature ------------------------------------------------------------------------------------------------------------ 150°C  Storage Temperature --------------------------------------------------------------------------------------------------------------- -45℃ to 165℃  Operating Junction Temperature Range (TJ) ---------------------------------------------------------------------------------- -40℃ to 85°C  Maximum Soldering Temperature (at leads, 10 sec) ----------------------------------------------------------------------------------- 260°C 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. Thermal Information Note 2  Maximum Power Dissipation (PD,TA=25°C) ---------------------------------------------------------------------------------------------- 2W  Thermal Resistance (JA) ---------------------------------------------------------------------------------------------------------------------- 50℃/W Note 2. JA is measured in the natural convection at TA = 25C on a high effective thermal conductivity four-layer test board of JEDEC 51-7 thermal measurement standard ESD Susceptibility Note 3  HBM(Human Body Mode) -------------------------------------------------------------------------------------------------------------- 2KV MM(Machine Mode) --------------------------------------------------------------------------------------------------------------------- 200V Note 3. Devices are ESD sensitive. Handling precaution is recommended  LP28056 – 03 Apr.-2019 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 3 of 8 Preliminary Datasheet LP28056 Electrical Characteristics (The specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, unless otherwise noted.) SYMBOL VIN PARAMETER CONDITIONS Adapter/USB Voltage Range MIN 4.5 Charge Mode, RISET = 10k ICC VFLOAT IBAT Input Supply Current Regulated Output (Float) Voltage BAT Pin Current Standby Mode (Charge Terminated) Shutdown Mode (RISET Not Connected ) TYP. 5 MAX UNITS 6.5 V 300 2000 300 500 uA 50 IBAT = 40mA，LP28056SPF 4.158 4.2 4.242 IBAT = 40mA，LP28056SPF-43 4.25 4.3 4.35 RISET = 1k VTRIKL