{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8487601","patent":{"patent_number":"US-8487601","title":"Method and apparatus to control a power factor correction circuit","assignee":null,"inventors":[],"filing_date":"2011-08-18T00:00:00.000Z","publication_date":"2013-07-16T00:00:00.000Z","cpc_codes":["H02M","H02M"],"num_claims":17,"abstract":"An example power factor correction (PFC) converter includes an energy transfer element, a power switch, and a controller. The controller includes an integrator and on/off logic. The integrator generates an integrator output signal in response to a voltage sense signal and a current sense signal. The on/off logic drives the power switch on and off to control a transfer of energy through the energy transfer element to an output of the PFC converter and terminates an on time of the power switch when the integrator output signal reaches a threshold value. A gain of the integrator is adjusted in response to the voltage sense signal such that the threshold value is substantially constant independent of the magnitude of the ac voltage source when a load condition at the output of the PFC converter is constant."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus to control a power factor correction circuit","description":"An example power factor correction (PFC) converter includes an energy transfer element, a power switch, and a controller. The controller includes an integrator and on/off logic. The integrator generat","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8487601","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-8487601","citation_suggestion":"Patentable. \"Method and apparatus to control a power factor correction circuit\" (US-8487601). https://patentable.app/patents/US-8487601","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8487601","json":"https://patentable.app/api/llm-context/US-8487601","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T23:25:01.297Z"}