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给予UCC28019功率因数电源带载问题

Other Parts Discussed in Thread: UCC28019

网友 tanfeng193 在21ic 电源技术 论坛问以下问题长期未解决:

http://bbs.21ic.com/icview-566165-1-1.html

近日在调试给予UCC28019的功率因数开关电源时 当不接负载时稳定输出35伏输入交流18伏经整流桥后整流桥后电压为20   接上100欧姆的电阻后整流桥后的电压下降为15伏左右 输入交流18伏左右没变化。当满载的时候输出电压为30伏左右 附件里有工程文件望各位大虾看下!