| 摘要:提出了一种基于临界电流模式的峰值电流控制技术来实现开关电源的功率因数校正任务。首先论述了临界电流模式的峰值电流控制技术的基本思想，其次论述了采用控制芯片UCC38051制作了一台输出功率为100W的原理样机。实验结果表明该原理样机能将功率因数提高到0.99以上，总谐波畸变小于7%。 |
| 关键词: 开关电源 有源功率因数校正 临界电流模式 总谐波畸变 |
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| Analysis of APFC Circuit Operated Based on UCC38051 |
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| Abstract:A critical current mode based on the peak current control technology to achieve switching power supply power factor correction task is proposed. Firstly it expounds peak current control technology of the critical current mode, then discusses a 100W laboratory prototype based on control chip UCC38051. The experimental results verify that the prototype can make the power factor reach over 0.99,and make total harmonic distortion reach lower than 7%. |
| Key words: Switching power supply Active power factor correction critical current mode total harmonic distortion |