{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9812976","patent":{"patent_number":"US-9812976","title":"Control of a startup circuit using a feedback pin of a PWM controller integrated circuit chip","assignee":null,"inventors":[],"filing_date":"2016-05-02T00:00:00.000Z","publication_date":"2017-11-07T00:00:00.000Z","cpc_codes":["H02M","H02M","H02M","H02M"],"num_claims":20,"abstract":"A power supply includes a control transistor that controls a primary winding of a transformer to induce current on a secondary winding of the transformer to generate an output voltage. A pulse width modulation (PWM) controller integrated circuit (IC) chip drives the control transistor through a gate pin. The PWM controller IC chip has a feedback pin that receives a feedback signal indicative of the output voltage. A high voltage (HV) startup transistor is controlled through the feedback pin. The HV startup transistor turns ON during startup to generate a supply voltage from current received from the input voltage of the power supply. The HV startup transistor turns OFF when the supply voltage reaches a startup voltage level that is sufficient to start the switching operation of the control transistor and thereby receive operating current from an auxiliary winding of the transformer."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Control of a startup circuit using a feedback pin of a PWM controller integrated circuit chip","description":"A power supply includes a control transistor that controls a primary winding of a transformer to induce current on a secondary winding of the transformer to generate an output voltage. A pulse width m","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9812976","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-9812976","citation_suggestion":"Patentable. \"Control of a startup circuit using a feedback pin of a PWM controller integrated circuit chip\" (US-9812976). https://patentable.app/patents/US-9812976","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9812976","json":"https://patentable.app/api/llm-context/US-9812976","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T15:04:31.182Z"}