TY - GEN
T1 - Primary-Side Controlled Flyback Converter with Propagation-Delay Compensation
AU - Lai, Jui Hung
AU - Liang, Tsorng Juu
AU - Chen, Kai Hui
AU - Hsin-Chen, Hsu
AU - Peng, Guan Ting
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Primary-side regulation (PSR) flyback converter has advantages of compact size, lower cost, and less power loss on devices because secondary-side feedback circuit is needless. In general, PSR flyback converter uses current sensing resistor to sense primary-side current peak value, and auxiliary winding to detect output diode conduction period, then output current can be estimated. However, it exists error between the sensed value and the real value of primary-side current peak value because of the time delay between power switch turn-off instant and output diode conducting instant. In prior researches, the compensation method of primaryside current peak value is to detect the delay period and estimate the current error with assuming that primary-side current increases linearly, but parasitic capacitances of power switch let primary-side current change nonlinearly actually. The current error compensation can be achieved by detecting the sink current of the gate driver circuit. Finally, the output current control is implemented with digital controller TMS320F28335, and applied to an input voltage at 130 V, output current of 5 A, output voltage of 12 V, and output power of 60 W flyback converter to verify the feasibility of proposed compensation method.
AB - Primary-side regulation (PSR) flyback converter has advantages of compact size, lower cost, and less power loss on devices because secondary-side feedback circuit is needless. In general, PSR flyback converter uses current sensing resistor to sense primary-side current peak value, and auxiliary winding to detect output diode conduction period, then output current can be estimated. However, it exists error between the sensed value and the real value of primary-side current peak value because of the time delay between power switch turn-off instant and output diode conducting instant. In prior researches, the compensation method of primaryside current peak value is to detect the delay period and estimate the current error with assuming that primary-side current increases linearly, but parasitic capacitances of power switch let primary-side current change nonlinearly actually. The current error compensation can be achieved by detecting the sink current of the gate driver circuit. Finally, the output current control is implemented with digital controller TMS320F28335, and applied to an input voltage at 130 V, output current of 5 A, output voltage of 12 V, and output power of 60 W flyback converter to verify the feasibility of proposed compensation method.
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U2 - 10.1109/IFEEC58486.2023.10458613
DO - 10.1109/IFEEC58486.2023.10458613
M3 - Conference contribution
AN - SCOPUS:85189745598
T3 - 2023 International Future Energy Electronics Conference, IFEEC 2023
SP - 146
EP - 150
BT - 2023 International Future Energy Electronics Conference, IFEEC 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 6th International Future Energy Electronics Conference, IFEEC 2023
Y2 - 20 November 2023 through 23 November 2023
ER -