{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9674907","patent":{"patent_number":"US-9674907","title":"Input surge protection circuit and method for a non-isolated buck-boost LED driver","assignee":null,"inventors":[],"filing_date":"2016-03-31T00:00:00.000Z","publication_date":"2017-06-06T00:00:00.000Z","cpc_codes":["H02M","H02M","H02M","H02M","H02M","H02M"],"num_claims":13,"abstract":"An LED driver is provided with input surge absorbing capacity. A surge protection circuit branch is coupled across output lines from a DC power source, in parallel with and between a filtering capacitor and a non-isolated buck-boost PFC circuit. A variable impedance device such as a spark gap is coupled to a first power line and having a breakdown voltage to operate as an open circuit during normal operating conditions with respect to a peak input voltage across the capacitor. Responsive to a surge condition with respect to excess energy across the capacitor, the spark gap operates as a closed circuit, and a second capacitor coupled between the spark gap and the second line absorbs the excess energy. Responsive to a return to normal operating conditions, the spark gap reverts to an open state and the accumulated surge energy is discharged from the second capacitor to circuit ground."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Input surge protection circuit and method for a non-isolated buck-boost LED driver","description":"An LED driver is provided with input surge absorbing capacity. A surge protection circuit branch is coupled across output lines from a DC power source, in parallel with and between a filtering capacit","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9674907","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-9674907","citation_suggestion":"Patentable. \"Input surge protection circuit and method for a non-isolated buck-boost LED driver\" (US-9674907). https://patentable.app/patents/US-9674907","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9674907","json":"https://patentable.app/api/llm-context/US-9674907","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:19:32.030Z"}