本设计PFC控制采用TI-UCC28070,外围电路根据芯片手册推荐的阻容值上下调试,开关频率尝试过52.5K-72.5K,抖频尝试过2K-8K,最终开关频率设定为62.5K,抖频设定为7.2K,最大占空比设定为97.8%,采用电流检测和PWM斜坡补偿电路,驱动部分最早采用的推挽放大电路,后来改用UCC27324芯片的驱动放大电路。
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
您好,我最近也在整PFC,但是芯片pin脚有问题,您能把UCC28070的PSPice仿真模型发给我吗,有CDR和RDM的pin脚的,谢谢,急等,因为需要这两个pin脚的功能,期待发送291769742@qq.com