Invention Publication
- Patent Title: Startup of Switched Capacitor Step-Down Power Converter
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Application No.: US18073384Application Date: 2022-12-01
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Publication No.: US20230283179A1Publication Date: 2023-09-07
- Inventor: Aichen Low , Walid Fouad Mohamed Aboueldahab , Gregory Szczeszynski
- Applicant: pSemi Corporation
- Applicant Address: US CA San Diego
- Assignee: pSemi Corporation
- Current Assignee: pSemi Corporation
- Current Assignee Address: US CA San Diego
- Main IPC: H02M3/07
- IPC: H02M3/07 ; G05F3/26 ; G05F1/565

Abstract:
Circuit embodiments for a switched-capacitor power converter, and/or methods of operation of such a converter, that robustly deal with various startup scenarios, are efficient and low cost, and have quick startup times to steady-state converter operation. Embodiments prevent full charge pump capacitor discharge during shutdown of a converter and/or rebalance charge pump capacitors during a startup period before switching operation by discharging and/or precharging the charge pump capacitors. Embodiments may include a dedicated rebalancer circuit that includes a voltage sensing circuit coupled to an output voltage of a converter, and a balance circuit configured to charge or discharge each charge pump capacitor towards a target steady-state multiple of the output voltage of the converter as a function of an output signal from the voltage sensing circuit indicative of the output voltage. Embodiments prevent or limit current in-rush to a converter during a startup state.
Information query
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