最后概括了有源功率因数校正技术的发展趋势。

At the end of the article, it summarizes the trends of active PFC technology.

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功率因数校正(PFC)是电源设计中的关键内容之一。

PFC is one of the key points in the design of power supply.

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主要介绍了有源功率因数校正（APFC）的工作原理、电路分类。

Principle and class of active power factor correction(APFC) are introduced.

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主要介绍了有源功率因数校正（APFC）的工作原理、电路分类。

Principle and class of active power factor correction(APFC) are introduced.

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