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TIDA-010210: Light load condition

Part Number: TIDA-010210

Hi,

Tables 3-1 and 3-2 in the design guideline only record the efficiency of PFC from 2-kW to 11-kW.

Have you tested lighter loads (< 2-kW)? Can you share relevant waveform or data? 

Are there any difficulties or issues with control under very light loads?

  • Hi,

    yes we have tested the reference design also at low load condition but with do not have available data to share.

    The converter was still able to operate with still a decent THD because of the three/level operation.

    Control does not require any special care when operating at low load.

    If operating close to 0 W I suggest to disable the middle point control regulation because if there is a change between PFC and INV operation without changing the middle point control sign in instability can occur.

    Thanks

    Best Regards

    Riccardo