Active Clamp Flyback vs Hybrid Flyback

KZM · ‎Mar 18, 2023

Kindly expalin key pros and cons of Active Clamp Flyback vs Hybrid Flyback.

Sodum · ‎Mar 20, 2023

Hello @KZM ,

Following are a few advantages of Hybrid flyback over Active clamp flyback (ACF),

Lower voltage stress on the FETs compared to ACF.
Both the high side & low side FETs operate at ZVS, so have better efficiency.
Smaller transformer size. Both transformer and resonant capacitor store energy intermediately during the energy transferring from the primary to the secondary side. This reduces the necessary transformer size.
Due to the resonant characteristics, hybrid flyback operates very well with a wide input range while the switching frequency is limited within a relatively small range., which is beneficial for EMI filter design.

Please find the below link for more details,

Regards,
Premsagar S

Sodum · ‎Mar 20, 2023

Hello @KZM ,

Following are a few advantages of Hybrid flyback over Active clamp flyback (ACF),

Lower voltage stress on the FETs compared to ACF.
Both the high side & low side FETs operate at ZVS, so have better efficiency.
Smaller transformer size. Both transformer and resonant capacitor store energy intermediately during the energy transferring from the primary to the secondary side. This reduces the necessary transformer size.
Due to the resonant characteristics, hybrid flyback operates very well with a wide input range while the switching frequency is limited within a relatively small range., which is beneficial for EMI filter design.

Please find the below link for more details,

Regards,
Premsagar S

Re: Active Clamp Flyback vs Hybrid Flyback