Journal of Power Electronics

  • 제20권2호
  • /
  • Pages.341-349
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  • 2020
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  • 1598-2092(pISSN)
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  • 2093-4718(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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Quasi-resonant flyback PSR converter with adaptive frequency control

  • Han, Xiong (School of Microelectronics, Southeast University) ;
  • Chang, Changyuan (School of Microelectronics, Southeast University) ;
  • He, Luyang (School of Microelectronics, Southeast University)
  • 투고 : 2019.06.24
  • 심사 : 2019.09.22
  • 발행 : 2020.03.20
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, a quasi-resonant (QR) flyback primary-side regulation (PSR) converter with adaptive frequency control is proposed. The converter adopts the PSR scheme to detect load information through the auxiliary winding. The converter employs the QR control scheme to switch in the valley mode either in CV or CC operation, which greatly reduces the switching loss. In addition, according to the load condition, the converter adaptively reduces the switching frequency and realize valley switching, which achieves better light-load efficiency in the CV mode. The proposed QR converter was implemented using the HHGRACE 0.35 ㎛ BCD process and verified in a 5 V/1A circuit prototype. Experimental results show that the light-load power efficiency of the proposed converter is improved by up to 4.0% when compared to the conventional QR controller. In addition, the valley switching is realized under different load conditions, which improves the system efficiency in the entire range of output load.

키워드

참고문헌

  1. ENERGY STAR program requirements for single voltage AC-DC and AC-AC power supplies, Eligibility Criteria (version 2.0), FINAL, pp 3-4
  2. Panov, Y., Jovanovic, M.M.: Adaptive off-time control for variable-frequency, soft-switched flyback converter at light loads. IEEE Trans. Power Electron. 17(4), 596-603 (2002) https://doi.org/10.1109/TPEL.2002.800958
  3. Li, Y., Zheng, J.: A low-cost adaptive multi-mode digital control solution maximizing AC/DC power supply efficiency. In: Applied Power Electronics Conference & Exposition IEEE (2010)
  4. Chang, C., et al.: Design of a highly accuracy PSR CC/CV AC-DC converter based on a cable compensation scheme without external capacitor. IEEE Trans. Power Electron. 34(10), 9552-9561 (2019) https://doi.org/10.1109/tpel.2019.2893737
  5. Lin, B.R., Dong, J.Y.: Analysis and implementation of an active clamping zero-voltage turn-on switching/zero-current turn-off switching converter. IET Power Electron. 3(3), 429 (2010) https://doi.org/10.1049/iet-pel.2009.0090
  6. Xue, L., Zhang, J.: Highly-efficient secondary-resonant active clamp flyback converter. IEEE Trans. Ind. Electron. 65(2), 1235-1243 (2017) https://doi.org/10.1109/tie.2017.2733451
  7. Huang, G.C., Liang, T.J., Chen, K.H.: Losses analysis and low standby losses quasi-resonant flyback converter design. In: 2012 IEEE International Symposium on Circuits and Systems (ISCAS). IEEE (2012)
  8. Park, J., et al.: Quasi-resonant (QR) controller with adaptive switching frequency reduction scheme for flyback converter. IEEE Trans. Ind. Electron. 63(6), 3571-3581 (2016) https://doi.org/10.1109/TIE.2016.2523931
  9. Kang, Y.C., Chiu, C.C., Lin, M., Yeh, C.P., Lin, J.M., Chen, K.H.: Quasi-resonant control with a dynamic frequency selector and constant current startup technique for 92% peak efficiency and 85% light-load efficiency flyback converter. IEEE Trans. Power Electron. 29(9), 4959-4969 (2014) https://doi.org/10.1109/TPEL.2013.2263040
  10. Stracquadaini, R.D: Mixed mode control (fixed off time & quasi resonant) for flyback converter. In: 36th Annual Conference on IEEE Industrial Electronics Society (2010)
  11. Kang, S.H., Maksimovic, D., Cohen, I.: Efficiency optimization in digitally controlled flyback DC-DC converters over wide ranges of operating conditions. IEEE Trans. Power Electron. 27(8), 3734-3748 (2012) https://doi.org/10.1109/TPEL.2012.2186590
  12. Hong, J.P., Moon, G.W.: A digitally controlled soft valley change technique for a flyback converter. IEEE Trans. Ind. Electron. 62(2), 966-971 (2015) https://doi.org/10.1109/TIE.2014.2352600