2009•European Conference on Power Electronics and ApplicationsRequires access

High performance ac-dc notebook PC adapter meets EPA 4 requirements

Alberto Stroppa, C. Spini, Claudio Adragna

Abstract

This paper presents the characteristics and the performance of a 75W-19V ac-dc adapter for notebook PC tailored on the latest Energy Star Program requirements. The power supply is composed of a front-end PFC pre-regulator and a Flyback downstream converter. An innovative PFC control circuit sensing both the input and the output voltages through an auxiliary winding is the key element in achieving the desired performance. A prototype board has been implemented and test results are reported.

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Available abstract

Key concepts: Adapter (computing), AC adapter, Flyback transformer, Flyback converter, Electrical engineering, Computer science, Voltage, Voltage regulator