Title :
High performance ac-dc notebook PC adapter meets EPA 4 requirements
Author :
Stroppa, Alberto ; Spini, Claudio ; Adragna, Claudio
Author_Institution :
STMicroelectron., Agrate Brianza, Italy
Abstract :
This paper presents the characteristics and the performance of a 75 W-19 V 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.
Keywords :
power convertors; power factor correction; switched mode power supplies; ac-dc notebook; flyback downstream converter; power factor correction; sensorless control; switched mode power supply; Circuit testing; Energy consumption; Guidelines; Harmonic distortion; Power generation; Power supplies; Prototypes; Switching loss; Uniform resource locators; Voltage control; Efficiency; Power Factor Correction; Sensorless Control; Switched Mode Power Supply;
Conference_Titel :
Power Electronics and Applications, 2009. EPE '09. 13th European Conference on
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-4432-8
Electronic_ISBN :
978-90-75815-13-9
