Invention Grant
- Patent Title: Output overvoltage protection for a totem pole power factor correction circuit
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Application No.: US17659250Application Date: 2022-04-14
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Publication No.: US12003171B2Publication Date: 2024-06-04
- Inventor: Armando Gabriel Mesa , Ajay Karthik Hari
- Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
- Applicant Address: US AZ Phoenix
- Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
- Current Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
- Current Assignee Address: US AZ Scottsdale
- Agency: Brake Hughes Bellermann LLP
- Main IPC: H02M1/32
- IPC: H02M1/32 ; H02M1/42 ; H02M1/44

Abstract:
During a light load (or no-load) operation of a totem pole power factor correction circuit (i.e., PFC), a pulse width modulation (PWM) controller can operate in a skip mode. Further, the PWM controller may disable portions of the PFC to reduce standby power consumption. In this mode, and in this disabled configuration, the output of the PFC may be peak charged over time to a voltage that could be damaging or destructive. This peak charging results from the PFC circuit's inability to fully charge/discharge EMI capacitors between half cycles of the input line voltage. The present disclosure provides circuits and methods to fully charge/discharge the EMI capacitors to prevent peak charging the output.
Public/Granted literature
- US20220345033A1 OUTPUT OVERVOLTAGE PROTECTION FOR A TOTEM POLE POWER FACTOR CORRECTION CIRCUIT Public/Granted day:2022-10-27
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