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【TI分享】TI控制芯片UCC28070的调试

Other Parts Discussed in Thread: UCC27324, UCC28070

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。