Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29846
Title: A novel method for elimination of line-current harmonics in single-stage PFC switching regulators
Authors: Chow, MHL 
Siu, KW
Tse, CK 
Lee, YS
Keywords: Control
Power factor correction
Switch-mode power supplies
Issue Date: 1998
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on power electronics, 1998, v. 13, no. 1, p. 75-83 How to cite?
Journal: IEEE transactions on power electronics 
Abstract: This paper studies a particular single-stage power-factor-correction (PFC) switching regulator employing a discontinuous-conduction-mode (DCM) boost-input cell and a continuous-current-mode (CCM) forward output cell. Although this single-stage PFC regulator can provide a reasonably high power factor when its PFC stage is operating in discontinuous mode, substantial reduction in line-current harmonics is possible by applying a suitable frequency-modulation scheme. This paper derives a frequency-modulation scheme and proposes a practical implementation using a simple translinear analog circuit. A quantitative analysis on the total harmonics distortion (THD) of the line current when the circuit is subject to a limited range of frequency variation is presented along with some considerations for practical design. Experimental data obtained from a prototype confirms the effectiveness of the proposed frequency-modulation scheme. The proposed analog translinear circuit allows custom integrated circuit (IC) implementation, making it a viable low-cost solution to the elimination of line-current harmonics in switching regulators.
URI: http://hdl.handle.net/10397/29846
ISSN: 0885-8993
EISSN: 1941-0107
DOI: 10.1109/63.654961
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