How to implement high frequency (MHz) PFC

LIJIA

How to implement high frequency (MHz) PFC [Copy link]

Hello, I want to make a high-frequency PFC. The frequency is 1-2MHz, PF and efficiency are >90%. The output is about 100W, and the input voltage is 100-240V. I have read some information. Traditional PFC control chips are mostly used for low frequencies, and most of those that reach MHz use MCU to control the totem pole topology.

But how to simulate it? Software such as PSpice cannot simulate MCU, but simulation with analog chips cannot reach the required frequency. In addition, many TI models are also encrypted. . . So I am stuck, please help me! !

Thank you very much!!!

maychang

For a 100W PFC, the switching frequency must be above 1MHz. The existing switching tubes and iron cores may have too much loss, which is not worth the cost.

LIJIA

maychang posted on 2018-9-27 13:44 For a 100W PFC, the switching frequency must be above 1MHz. The existing switch tube and iron core may have too much loss, which is not worth the cost.

Yes, I see that many MHz are at the KW level. The main indicator is the frequency. If it reaches MHz, the analog chip does not seem to have such a high frequency. How should it be simulated?