A Self-Oscillating Flyback Converter with Primary Feedback Control
Due to its simplicity and low component count, a self-oscillating flyback converter is an ideal topology for cost sensitive applications, such as mobile phone chargers and auxiliary power supplies. To regulate the output voltage, the conventional self-oscillating flyback converter employs a secondary feedback current mode control scheme whose major components include a TL431 error amplifier and optocoupler. These two components nonetheless contribute significantly to a total cost of the self-oscillating flyback converter. A further cost reduction can be achieved, if the error amplifier and optocoupler can be eliminated altogether. This paper proposes a self-oscillating flyback converter with primary feedback control. In the proposed converter, the error amplifier and optocoupler are replaced by a Zener diode, and the output voltage from the auxiliary winding is used as a feedback variable, instead of the actual output voltage from the secondary winding. In the paper, the operation of the proposed converter is described. The prototype converter operating from a 220 V AC main and producing an output of 24 V/0.5 A is fabricated and tested. Experimental results are presented to verify the converter performance as well as to validate the principle of operation.
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D. W. Hart, Power Electronics (McGraw-Hill Companies, 2011).
A. I. Pressman, K. Billings, T. Morey, Switching Power Supply Design (McGraw-Hill Companies, 2009).
S. Howimanporn, C. Bunlaksananusorn, Performance comparison of continuous conduction mode (CCM) and discontinuous conduction mode (DCM) flyback converters, The 5th International Conference on Power Electronics and Drive Systems, November 17-20, 2003, Singapore.
C. Adragna, L6565 Quasi-resonant controller application note, STMicroelectronics, 2002.
Y. Panov, M. M. Jovanovic, Small-Signal Analysis and Control Design of Isolated Power Supplies with Optocoupler Feedback, IEEE Transactions on Power Electronics, vol. 20, issue 4, July 2005, pp. 823 – 832.
W. Kleebchampee, C. Bunlaksananusorn, Modeling and control design of a current-mode controlled flyback converter with optocoupler feecdback, The 6th International Conference on Power Electronics and Drive Systems, 2005, Malaysia.
J. Lempinen, T. Suntio, Small-signal modeling for design of robust variable-frequency flyback battery chargers for portable device applications, The 16th Annual IEEE Applied Power Electronics Conference and Exposition, March 4-8, 2001, USA.
B.T. Irving, Y. Panov, M. Jovanovic, Small-signal model of variable-frequency flyback converter, The 18th Annual IEEE Applied Power Electronics Conference and Exposition, February 9-13, 2003, USA.
C. H. Cheng, C. J. Chen, S. S. Wang, An overview of stability improvement methods for wide-operation-range flyback converter with variable frequency peak-current-mode control, The International Power Electronics Conference, May 20-24, 2018, Japan.
C. Basso, Switch-Mode Power Supplies: SPICE Simulations and Practical Designs (McGraw-Hill Companies, 2008).
S. Meo, L. Toscano, Some New Results on the Averaging Theory Approach for the Analysis of Power Electronic Converters, IEEE Transactions on Industrial Electronics, vol. 65, issue 12, December 2018, pp. 9367-9377.
Song, T., Lee, S., Do, H., A Zeta-Flyback Resonant DC-DC Converter for LED Driver, (2016) International Review of Electrical Engineering (IREE), 11 (6), pp. 554-557.
Song, T., Lee, S., Do, H., A Two-Stage Output Current Ripple-Free Flyback-Buck AC-DC LED Driver with High Power Factor, (2016) International Review of Electrical Engineering (IREE), 11 (1), pp. 1-8.
Lee, S., Do, H., Single-Stage Single-Switch AC-DC LED Driver with High Power Factor, (2017) International Review of Electrical Engineering (IREE), 12 (1), pp. 1-8.
R. W. Erickson, D. Maksimovic, Fundamentals of Power Electronics (Kluwer Academic Publishers, 2001).
UC3825 datasheet, Texas Instrument, 2004.
NCP1200 datasheet, ON Semiconductor, 2015.
VIPER16 datasheet, ST Microelectronics, 2014.
P. Lidak, Critical conduction mode flyback switching power supply using the MC33364, Motorola semiconductor application note, 1998.
B. T. Irving, M. M. Jovanovic, Analysis and design of self-oscillating flyback converter, The 17th Annual IEEE Applied Power Electronics Conference and Exposition, March 10-14, 2002, USA.
R. Nalepa, N. Barry, P. Meaney, Primary side control circuit of a flyback converter, The 16th Annual IEEE Applied Power Electronics Conference and Exposition, March 4-8, 2001, USA.
B. Khemmanee, N. Chuladaycha, C. Bunlaksananusorn, A low-cost flyback converter with primary side regulation for a TV set top box, The International Electrical Engineering Congress, March 8-10, 2017, Thailand.
T. J. Liang, K. H. Chen, J. F. Chen, Primary Side Control for Flyback Converter Operating in DCM and CCM, IEEE Transactions on Power Electronics, vol. 33, issue 4, April 2018, pp. 3604-3612.
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