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UCC28740: Flyback Aux Power Solution.

Part Number: UCC28740
Other Parts Discussed in Thread: LM5021, UCC28730, UCC28911, UCC28C43

Hi Team,

Customer is doing a Flyback Aux Power Solution for their LLC system. They have already test UCC28740 with demo board. But the working frequency is low, and output ripple is high when I change to our design.

They want a fix-frequency flyback controller with HV pin.

  • Input: 400Vin
  • Output: 12V/0.3A
  • Ripple:<200mV。
  • Freq: 100k

Do you have any good proposal? Many thanks!

regards,

Bell