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LP28501 Datasheet(PDF) 1 Page - Lowpower Semiconductor inc |
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LP28501 Datasheet(HTML) 1 Page - Lowpower Semiconductor inc |
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1 / 10 page  LP28501-02 Mar.-2017 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 10 Preliminary Datasheet LP28501 3.5A Synchronous Buck Li-ion Charger With Intelligent Path Management and Adapter Adaptive General Description The LP28501 is a 3.5A Li-Ion battery charger intended for 4.4V~14V wall adapters. It utilizes a high efficiency synchronous buck converter topology to reduce power dissipation during charging. The LP28501 includes complete charge termination circuitry, automatic recharge and a ±1% 4.2V/4.3V /4.35V float voltage. The LP28501 could manage the power supply for system intelligently. The adapter would satisfy the system`s demand firstly, then charge battery with extra current output capacity from adapter. If the current capacity of adapter could not meet the system demand, the adapter and battery would supply power for system together. When the adapter`s current capacity is low than the set charge current, the LP28501 would decrease the charge current automatically to keep the output of adapter would not be pull down by the chip. Additional features include shorted cell detection; temperature qualified charging and overvoltage protection. The LP28501 is available in a low profile QFN-28 package. Order Information LP28501 □ □ □ F: Pb-Free Package Type QV: QFN-28 Applications Quick charge 2.0/3.0 (QC2.0 / QC3.0) Portable Media Players Cellular and Smart mobile phone PDA/DSC Handheld Battery-Powered Devices Handheld Computers Charging Docks and Cradles Features Power Path Management Intelligently Adapter Adaptive CHARGE: Very Low Power Dissipation 3.5A Maximum Charge Current Efficiency up to 90% Input voltage: 4.4V~14V Programmable charge complete voltage: 4.2V /4.3V /4.35V Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating Charges Single Cell Li-Ion Batteries Directly from USB Port Available in QFN28(4*4mm) Package RoHS Compliant and 100% Lead (Pb)-Free Functional Pin Description 27 25 24 23 1 2 3 4 5 16 15 6 22 17 28 21 20 19 18 7 VDDA VBAT CE IREF VDDA SYSSEL VB GNDP LDR VDDP BST LX HDR STAT 8 10 9 11 12 13 14 26 29 GNDA Marking Information Device Marking Package Shipping LP28501QVF LPS LP28501 YWX QFN-28 3K/REEL Y: Year code. W: Week code. X: Batch numbers. |
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