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LP28400 Datasheet(PDF) 1 Page - Lowpower Semiconductor inc |
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LP28400 Datasheet(HTML) 1 Page - Lowpower Semiconductor inc |
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1 / 17 page  Preliminary Datasheet LP28400 LP28400-00 Version 1.0 May.-2013 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 17 3A/15V Synchronous Switching Mode 1/2cell Li-ion Chargers With Power Path Selector General Description The LP28400 is a complete constant-current/ constant- voltage Switch mode charger for 1cell or 2cell lithium-ion batteries. 1.5MHz Synchronous Switching Charger with 3A Integrated MOSFETs. No external blocking diodes is required. The Switch mode charger uses a high switching frequency to reduce power dissipation during charging eliminate heat and allow tiny external components. It can operate from a single input that accepts. All power switches for charging and switching the load between battery and external power are included on-chip that can be embedded in a wide range of handheld applications, Built-in power path controller, easily installation with external MOSFETs, Dynamic power management, better thermal performance. The LP28400 includes complete charge termination circuitry, automatic recharge and a ±1% output voltage. Fault condition protection includes cycle -by -cycle current limiting and thermal shutdown. Other safety features include battery temperature monitoring, charge status indication and programmable timer to cease the charging cycle. The LP28400 is available in a low profile (0.75mm) 10-lead (4mm × 4mm) TDFN package. Order Information LP28400 □ □ □ □ □ F: Pb-Free Package Type QV: TQFN-20 Output voltage Default: 4.2V/8.4V Features Up to 95% efficiency 4.5-15V Operating voltage(Vin) Vin Over Voltage Protection:6.8V/16.5V Short-circuit protection Programmable Charge Current Up to 3000mA Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating Charges 1Cell and 2cell Li-Ion Batteries Directly with same chip, Chargers with power path selector Internal Fixed 7Hrs timer Drainage Charge Current Thermal Regulation Status Outputs for LED or System Interface Indicates Charge and Fault Conditions Optional Battery Temperature Monitoring Before and During Charge Automatic Sleep Mode for Low-Power Consumption Available in 4mm × 4mm TQFN-20 Package RoHS Compliant and 100% Lead (Pb)-Free Marking Information Applications Portable Media Players Cellular and Smart mobile phone Car GPS Handheld Battery-Powered Devices Handheld Computers Charging Docks and Cradles Device Marking Package Shipping LP28400 LPS LP28400 XXXXX QV: TQFN-20 X: Batch numbers. |
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