Title :
Primary side control circuit of a flyback converter
Author :
Nalepa, Radek ; Barry, Noel ; Meaney, Peter
Author_Institution :
Dept. of Electr. & Electron. Eng., Cork Inst. of Technol., Ireland
Abstract :
Voltage feedback in flyback converters is typically done with the assistance of opto-couplers, to preserve electrical isolation. However the output voltage also exists (in part) across the primary side switch when in its off state. This paper investigates the extraction of the output voltage within one switching cycle. Good results are obtained from a flyback converter with a novel control circuit using cycle by cycle control. The converter works in both continuous and discontinuous mode of operation
Keywords :
DC-DC power convertors; feedback; switching circuits; voltage control; continuous mode; control circuit; cycle by cycle control; discontinuous mode; electrical isolation; flyback converter; off state; opto-couplers; output voltage; primary side control circuit; primary side switch; switching cycle; voltage feedback; Bandwidth; Circuit topology; Feedback; Flyback transformers; Galvanizing; Isolation technology; Switches; Switching circuits; Temperature; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2001. APEC 2001. Sixteenth Annual IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-6618-2
DOI :
10.1109/APEC.2001.911699
