Switched capacitor converter with zero voltage and zero current switching control and control method
By employing zero-voltage and zero-current switching technology in the switching capacitor converter to control the conduction sequence of the flying capacitors, the switching loss problem of traditional converters in high power density environments is solved, thereby improving conversion efficiency and thermal management performance.
CN122419201APending Publication Date: 2026-07-17RICHTEK TECH
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- RICHTEK TECH
- Filing Date
- 2025-05-08
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Traditional switching capacitor converters suffer from significant switching losses and voltage spikes due to instantaneous large current transfer caused by voltage mismatch in flying capacitors under high power density environments, which affects efficiency and thermal management.
Method used
By employing zero-voltage switching and zero-current switching technologies, the switching is enabled to conduct under zero-voltage or zero-current conditions by controlling the conduction sequence of the flying capacitor, thereby reducing switching losses.
Benefits of technology
This switching capacitor converter effectively reduces switching losses, improves conversion efficiency, and enhances thermal management, making it suitable for high power density applications.
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Figure CN122419201A_ABST
Abstract
本发明涉及一种具有零电压与零电流切换控制的切换电容转换器与控制方法。该切换电容转换器包含N个飞驰电容器及多个开关，用于在多个切换相位间进行周期性切换，以将一第一电压转换为一第二电压或反向转换，其中N≥1。当进入其中一第一切换相位时，本发明控制该N个飞驰电容器中至少一者的第一端较第二端先行导通，以电连接至该切换相位所对应的节点，形成所需的耦接关系，并使其第二端可在逐步接近零电压条件下再导通。由此可实现关键开关的零电压切换，有效降低切换损耗并提升整体转换效率。
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