Power Integrations has patented an apparatus and method for enhancing control in a resonant converter by sensing resonant circuit signals. The invention involves using a buffer circuit to provide a comprehensive signal for improved switching and power conversion in an LLC converter. The control module receives this signal to regulate output power efficiently. GlobalData’s report on Power Integrations gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Power Integrations, Quantum dot devices was a key innovation area identified from patents. Power Integrations's grant share as of April 2024 was 71%. Grant share is based on the ratio of number of grants to total number of patents.
Resonant converter with buffered primary port signal for control
A recently granted patent (Publication Number: US11955899B2) discloses a resonant converter designed to efficiently provide power to a load. The converter includes a resonant transformer with an input port, a primary bridge circuit supplying input power, and a control module that receives a buffered primary port signal. This signal contains detailed information about the input and output power of the converter, allowing the control module to adjust the output power to the load accordingly. The patent also describes a method for controlling the output power of the resonant converter, involving applying input power, providing a switched power signal to the transformer, and utilizing a buffered primary port signal for comprehensive signal information.
Furthermore, the patent details a controller for use in a resonant converter, featuring a sense interface circuit receiving the buffered primary port signal and a clock control circuit generating a switch signal to control the primary bridge circuit based on this signal. The controller also includes a sampling block for data points of the sense interface signal and a signal processing block to extract information such as input voltage and output power. A power control block is responsible for adjusting the primary bridge circuit based on this information, with the added feature of providing overcurrent protection. Overall, the patent highlights innovative techniques for efficiently controlling the output power of a resonant converter, enhancing its performance and reliability in various applications.
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