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LP28021A Datasheet(PDF) 1 Page - Lowpower Semiconductor inc |
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LP28021A Datasheet(HTML) 1 Page - Lowpower Semiconductor inc |
1 / 11 page LP28021-04 Apr.-2017 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 11 Preliminary Datasheet LP28021 1.0A Single-chip Li-ion and Li-POL Charger with OVP Protection General Description The LP28021/A is a complete constant-current/ constant voltage linear charger for single cell lithium-ion batteries. Its TDFN-10 package and low external component count make the LP28021/A 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 rammed externally with a single resistor(RIBAT). The LP28021 automatically terminates the charge cycle when the charge current drops to 1/10th the RIBAT rammed value after the final float voltage is reached. When the input supply is removed, the LP28021/A automatically enters a low current state, dropping the battery drain current to less than 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 LP28021 □ □□ □ □□ BAT Voltage Default: 4.2V 43: 4.35V F: Pb-Free Package Type QV: TDFN-10 SP: ESOP8 Function Class Default:OCP Adjustable A:Enable Features Very Low Power Dissipation Input Voltage: 3.8V~36V Input OVP: 6.1V Protection of Reverse Connection of Battery Programmable Charge Current Up to 1000mA 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 Leakage Current in Shutdown Drainage Charge Current Thermal Regulation Status Outputs for LED or System Interface Indicates Charge and Fault Conditions Consumption Available in TDFN-10 Package RoHS Compliant and 100% Lead (Pb)-Free Applications Portable Media Players/Game Power Bank PDA/MID Bluetooth Applications Marking Information Device Marking Package Shipping LP28021 LPS LP28021 YWX QV:TDFN-10 SP:ESOP8 3K/REEL 2.5K/REEL LP28021A LPS LP28021A YWX QV:TDFN-10 3K/REEL Marking indication: Y:Production year W:Production week X: Series Number |
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