{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8525493","patent":{"patent_number":"US-8525493","title":"Method and apparatus to increase efficiency in a power factor correction circuit","assignee":null,"inventors":[],"filing_date":"2011-09-02T00:00:00.000Z","publication_date":"2013-09-03T00:00:00.000Z","cpc_codes":["H02M"],"num_claims":13,"abstract":"A power factor correction (PFC) controller includes a first integrator coupled to integrate an input current of a PFC converter. A first signal is generated in response to the first integrator to end an on time of a power switch of the PFC converter. A second integrator is coupled to integrate a difference between a constant voltage and an input voltage of the PFC converter. A second signal is generated in response to the second integrator to end an off time of the power switch of the PFC converter. A driver circuit is coupled to vary the switching frequency of the power switch of the PFC converter in response to the first and the second signals and to output a third signal to switch the power switch of the PFC converter to control the input current to be substantially proportional to the input voltage."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus to increase efficiency in a power factor correction circuit","description":"A power factor correction (PFC) controller includes a first integrator coupled to integrate an input current of a PFC converter. A first signal is generated in response to the first integrator to end ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8525493","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-8525493","citation_suggestion":"Patentable. \"Method and apparatus to increase efficiency in a power factor correction circuit\" (US-8525493). https://patentable.app/patents/US-8525493","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8525493","json":"https://patentable.app/api/llm-context/US-8525493","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T18:48:36.877Z"}