基于UCC28070设计的300W PFC高效电源方案
UCC28070 300W交叉PFC预稳压器参考设计
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。
参考设计指标：
图4。典型平均电流模式交叉PFC预稳压器电路图
图5。300W原型子板控制器电路图
图6。300W原型主板电源电路图本文引用地址：http://www.eepw.com.cn/article/180518.htm
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