Title :
Monolithic controller for single stage power factor correction with isolation and soft-switching
Author :
Bazinet, John ; Dalal, Dhaval
Author_Institution :
Unitrode Corp., Merrimack, NH, USA
Abstract :
For offline power converters with power factor correction, single-stage step-down power conversion offers simplicity and high efficiency for medium to high power applications such as telecom power conversion. With the advent of faster, high voltage IGBTs, the isolated boost power converter with step-down (also known as the Clarke converter) is more feasible. A novel controller is presented which facilitates easy implementation of the isolated boost PFC operation with performance enhancements such as soft-switching with adaptive delays, a faster responding RMS input voltage detection circuit which eliminates an external 2-pole filter, safe start-up and no-load operation
Keywords :
AC-DC power convertors; DC-DC power convertors; bipolar transistor switches; field effect transistor switches; harmonic distortion; insulated gate bipolar transistors; power MOSFET; power bipolar transistors; power factor correction; power field effect transistors; power semiconductor switches; power system harmonics; rectifying circuits; switching circuits; Clarke converter; RMS input voltage detection circuit; adaptive delays; isolated boost power converter; isolation; monolithic controller; no-load operation; offline power converters; performance enhancements; power IGBTs; safe start-up; single-stage power factor correction; soft-switching; step-down power conversion; telecom power conversion; Adaptive control; Adaptive filters; Circuits; Delay; Insulated gate bipolar transistors; Power conversion; Power factor correction; Programmable control; Telecommunication control; Voltage control;
Conference_Titel :
Telecommunications Energy Conference, 1996. INTELEC '96., 18th International
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-3507-4
DOI :
10.1109/INTLEC.1996.572412
