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UCC24610: In Active Clamp Forward Application with LM5026

Suheyl Tr
Prodigy 190 points
Part Number: UCC24610
Other Parts Discussed in Thread: LM5026

Dear TI,

I'm designing a 66-144 VDC to 24 VDC (300W) converter using LM5026 with ACF topology. Regarding SR I have to use conditioning circuit for self-driving of FETs due to secondary high voltage. I have some concern about low-load or no-load DCM operation and its efficiency. Do you think using SR controller ICs (e.g. UCC24610) with SYNC pin employed, alleviate my concerns with significant amount maintaining the robustness considering the peripheral circuit complexity and component quantity compared to conditioning circuit? Does it worth it? And of course I'm open to other suggestions. Thank you in advance.

Best,

Suheyl 

  • +1
    TI__Expert 3431 points

    Hi, Suheyl:

    Thanks for your interests of UCC24610. However, I think self-driving is more suitable than UCC24610 since UCC24610's VCC is 6.5V only You may need to add extra circuit to extend VCC range and even a sync is used, you still needs to general a control signal to sync pin and make sure they would not over-lap.  So self-driving still a better way and recommend to active clamp forward SR. 

    Regards, 

    Wesley