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基于UCC28070設計的300W PFC高效電源方案

作者： 時(shí)間：2010-09-06 來(lái)源：網(wǎng)絡(luò ) 收藏


UCC28070 300W交叉PFC預穩壓器參考設計

UCC28070 300-W Interleaved PFC Pre-Regulator Design Review

In higher power applications to utilize the full line power and reduce line current harmonics PFC Pre-regulators are generally required. In these high power applications interleaving PFC stages can reduce inductor volume and reduce input and output capacitor ripple current. This results in smaller overall magnetic volume and filter capacitor volume increasing the converters overall power density. This is made possible through distributing the power over two interleaved boost converters and the inductor ripple current cancellation that occurs with interleaving, reference [5]. This application note will review the design of a 300W two-phase interleaved power factor corrected (PFC) pre-regulator. This power converter achieves PFC with the use of the UCC28070 interleaved PFC controller, reference。

參考設計指標：



圖4。典型平均電流模式交叉PFC預穩壓器電路圖

圖5。300W原型子板控制器電路圖

圖6。300W原型主板電源電路圖

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