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  • UCC28063A: UCC28063A with dual CCM PFC fixed off time

    Resolved
    Part Number: UCC28063A Tool/software: Hello. Can the UCC28063A dual interleaved PFC controller be used to synchronize two continuous conduction mode PFC stages, using a fixed off time (FOT) technique? Instead of using the ZCD signals at pins 1 and…
    • Resolved

  • UCC28065: Information on UCC28065 compared to UCC28063A and UCC28064A

    TI Thinks Resolved
    Part Number: UCC28065 Other Parts Discussed in Thread: UCC28063A , UCC28064A , , UCC28063 , UCC28064 Tool/software: Hi, UCC28065 is released as a successor model to UCC28063A and UCC28064A. Q1 UCC28065 has an improved operating frequency compared…
    • Answered

  • UCC28063A: UCC28063A

    Resolved
    Part Number: UCC28063A Hi The following waveforms are shown at AC 90V I don't think it's OCP. What's the problem? What are the debugging points to improve? Thanks
    • Resolved
    • Answered

  • UCC28063A: UCC28063A Inductor audio noise

    Resolved
    Part Number: UCC28063A My Power in VAC264V full load 300W condition have “Zizi…” audio noise, and VAC85~240V input no “Zizi…” audio noise, please get me a command to solve this audio noise Issue, thanks ! PS, all condition PFC Performance is normal…
    • Resolved
    • Answered

  • UCC28063A: UCC28063A PFC DC level Accuracy

    Resolved
    Part Number: UCC28063A For same circuit making two set power stage and get different PFC output DC Level, one is DC395V and another is DC406V,How can this situation be improved ? B/R James
    • Resolved
    • Answered

  • UCC28063A: About VSENSE filter capacitor

    Resolved
    Part Number: UCC28063A Hello, I recently asked about the phase compensation of the UCC28063A. Among them, I was advised to reduce the capacitance of the VSENSE filter capacitor shown below to less than 1nF. (Question) What is the reason for making the…
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  • RE: UCC28063A: Questions about the operation of the UCC28063A PWMCNTL pin.

    Resolved
    Hello Bob san, Thank you for your interest in the UCC28063A PFC controller. The state of the PWMCNTL output is determined only by the voltage at HVSEN input, the COMP and PHB voltage levels, and by the Phase-Fail detector output. This can be seen…
    • Answered

  • UCC28063A: PF optimization for UCC28063A

    Resolved
    Part Number: UCC28063A Hi, We find UCC28063A solution PF is low, 1kW load PF is about 0.98, 500W load PF is 0.92, could you pls give some suggestion on how to improve PF? Thanks.
    • Resolved

  • RE: UCC28063A: UCC28063A question about interleaving operation,master and slave were not 180 ° shifted waveforms.

    Hi Bob, Per TI policy, I need to close this thread to prevent it from remaining open for too long but please email me your customer's response at ben.lough@ti.com and we can continue over email. Best Regards, Ben Lough

  • UCC28063A: Is the AC input current sinusoidal?

    TI Thinks Resolved
    Part Number: UCC28063A Other Parts Discussed in Thread: UCC28063 , Hi Team, With reference to the scope image below, our customer would like to confirm if the AC Input current on a circuit with UCC28063 must be sinusoidal. The AC input voltage is 100V…

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