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AssigneeDelta Electronics, Inc.
InventorsShang-Kay YANG, Hsien-Kai WANG, Yen-Wei LIN
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An LLC resonant converter includes a transformer and a primary-side circuit coupled to the transformer. The primary-side circuit includes a first bridge arm, a second bridge arm, and a control unit. The first bridge arm includes a first switch and a second switch, and the second bridge arm includes a third switch and a fourth switch. The control unit provides a first control signal to control the first switch and provides a fourth control signal to control the fourth switch. The control unit adjusts a switching frequency of the first control signal and the fourth control signal according to an output voltage. When the switching frequency increases to a frequency threshold value, the switching frequency is controlled to be fixed at the frequency threshold, and the first control signal and the fourth control signal are controlled to have a variable phase difference.
An LLC resonant converter configured to convert an input voltage into an output voltage, the LLC resonant converter comprising:
A method of controlling an LLC resonant converter, the LLC resonant converter comprising a primary-side circuit having a first bridge arm and a second bridge arm connected in parallel, and the first bridge arm having a first switch and a second switch connected in series, and the second bridge arm having a third switch and a fourth switch connected in series, the method comprising steps of:
Dependencies are inferred from the claim text.