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Analysis and Design of Adapter

Analysis and Design of Adapter Met Energy Efficiency Codeunder Standby Condition without Using Current Sensor andHysteresis Circuit for Notebook Computer ApplicationsKe-Yen Lee Yen-Shin LaiDept. of Electrical Eng., Natl. Taipei U. of Tech., Taipei, Taiwan1, Sec. 3, Chung-Hsiao E. Rd., Taipei 106, TaiwanAbstract - The main theme of this paper is to present the analysis Auxiliary power is used to supply power for control IC atand design of an adapter for notebook computer. The the stage of starting period in which the DC/DC converter hascontributions of this paper include the analysis and design of not been able to provide well regulated DC source. Moreover,circuits, including PFC-OFF control and auxiliary circuit which the output voltage is regulated by current mode control whichwill significantly reduce the standby power consumption to meet.rthe energy efficiency.

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