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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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LM3658 bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM3658 bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
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1 / 13 page  LM3658 Dual Source USB/AC Li Chemistry Charger IC for Portable Applications General Description The LM3658 is a single chip charger IC designed for hand- held applications. It can safely charge and maintain a single cell Li-Ion/Polymer battery operating from an AC wall adapter or USB power source. Input power source selection of USB/AC is automatic. With both power sources present, the AC power source has priority. Charge current is pro- grammed through an external resistor when operating from an AC wall adapter allowing charge currents from 50 mA to 1000 mA. When the battery is charged using USB power, charge currents of 100 mA or 500 mA are pin-selectable. The termination voltage is controlled to within ±0.35% of 4.2V. The LM3658 requires few external components and inte- grates internal power FETs, reverse current protection and current sensing. The internal power FETs are thermally regu- lated to obtain the most efficient charging rate for a given ambient temperature. The LM3658 operates in five modes: pre-qualification mode, constant-current mode, constant-voltage mode, top-off mode and maintenance mode. Optimal battery management is obtained through thermal regulation, battery temperature measurement and multiple safety timers. The LM3658 pro- vides two open-drain outputs for LED status indication or connection to GPIOs. Features n Integrated power FETs with thermal regulation n Charges from either an AC wall adapter or USB power source with automatic source selection n 50 mA to 1000 mA charge currents using AC wall adapter n Pin-selectable USB charge currents of 100 mA or 500 mA n Continuous battery temperature monitoring n Built-in multiple safety timers n Charge status indication n Continuous over-current and temperature protection n Near-depleted battery pre-conditioning n Sleep mode with ultra low quiescent current n On-board Kelvin-sensing achieves ±0.35% termination accuracy n Maintenance mode with automatic recharge n Thermally enhanced 3 mmx3mmLLP package Applications n Smartphones n Digital still cameras n PDAs n Hard Drive and flash-based MP3 players n USB-powered devices Typical Application 20128201 May 2005 © 2005 National Semiconductor Corporation DS201282 www.national.com |
Số phần tương tự - LM3658 |
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Mô tả tương tự - LM3658 |
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