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TMS320F280049: 交流变换电路问题

Part Number: TMS320F280049
Other Parts Discussed in Thread: TIDA-010062

问题一、图腾柱PFC电路中,是否可以用二极管代替低频管工作进行调试,请帮忙分析下该问题

问题二、图腾柱PFC电路DC-DC转换(DC输入DC输出),电压环是否是必须的,若不需要电压环,为什么可以这样操作,仅仅电流环那么电压如何控制,