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Showing 16 results View by: Thread Post Sort by
  • PMP41009: UCC28740-Q1 PMP41009

    shilin.liu
    shilin.liu
    TI Thinks Resolved
    Part Number: PMP41009 Hello Linda, TVS is used for voltage clamp in the design of PMP41009 and the clamp voltage VC of P6KE300A is 414V, So how to ensure that it will not exceed the maximum voltage of HV pin 700V? What should I consider when choosing…
    • over 1 year ago
    • Simulation, hardware & system design tools
    • Simulation, hardware & system design tools forum
  • PMP41009: UCC28740-Q1

    shilin.liu
    shilin.liu
    Part Number: PMP41009 Tool/software: Hi Linda, When the VDD voltage reaches the opening threshold, is there necessarily three pulse detection failures? Sometimes I can only detect one or two or four pulses and then it stop working. What might be the…
    • 9 months ago
    • Simulation, hardware & system design tools
    • Simulation, hardware & system design tools forum
  • Answered
  • PMP41009: Transformer Details(core)

    TAE JIN KO
    TAE JIN KO
    Resolved
    Part Number: PMP41009 Tool/software: Hello Can I get the core data information used in the PMP41009 transformer? Regards, TaeJin
    • Resolved
    • over 1 year ago
    • Simulation, hardware & system design tools
    • Simulation, hardware & system design tools forum
  • PMP41009: UCC28740-Q1

    shilin.liu
    shilin.liu
    Part Number: PMP41009 Tool/software: Hi, I made a flyback power supply with reference to PMP41009. But the switching frequency is not stable when a constant load is added. So what is the possible cause? What are the adjustments? Thank you
    • over 1 year ago
    • Simulation, hardware & system design tools
    • Simulation, hardware & system design tools forum
  • PMP41009: UCC28740-Q1

    shilin.liu
    shilin.liu
    TI Thinks Resolved
    Part Number: PMP41009 Other Parts Discussed in Thread: UCC28740-Q1 Hi, I got some questions about UCC28740-Q1(Design reference PMP41009) 1. The recommended primary side ratio Nps of the transformer is 43.86, But this means a too much primary inductance…
    • over 1 year ago
    • Power management
    • Power management forum
  • Answered
  • PMP41009: UCC28740-Q1

    shilin.liu
    shilin.liu
    Resolved
    Part Number: PMP41009 Hi: I have a question about the selection of Rcs and Lp. In my design, the Lp calculated by sluc487b is too large. This will make the volume of the transformer large. If I choose a smaller Rcs I can reduce the value of Lp.…
    • Resolved
    • over 1 year ago
    • Power management
    • Power management forum
  • PMP41009: Questions about the cascode

    Frank QIN
    Frank QIN
    TI Thinks Resolved
    Part Number: PMP41009 Other Parts Discussed in Thread: UCC28740 Hi Experts, We are researching the reference design PMP41009, with below two questions: 1. In the cascode architecture, the normal operating voltage of D3 on the two side of Q1 G-S is…
    • over 1 year ago
    • Power management
    • Power management forum
  • Answered
  • PMP41009: About a filter capacitor on the VS input

    yuudai.nishikawa
    yuudai.nishikawa
    Resolved
    Part Number: PMP41009 Why place a filter capacitor on the VS input even though specification states "Avoid placing a filter capacitor on this input which interferes with accurate sensing of this waveform"? Also, what noise effects are being considered…
    • Resolved
    • over 1 year ago
    • Power management
    • Power management forum
  • Answered
  • PMP41009:About the operation of UCC28740

    YUMIKO KASHIWA
    YUMIKO KASHIWA
    Resolved
    Part Number: PMP41009 I made the same circuit as the reference design PMP41009 and made it work. I input 350V, but it doesn't work well. When I checked the HV terminal, it was about 30V and the VDD terminal was still 0V. Are there any possible factors…
    • Resolved
    • over 2 years ago
    • Power management
    • Power management forum
  • Answered
  • PMP41009: Which are the correct waveforms for the HV and VDD pins

    shilin.liu
    shilin.liu
    Resolved
    Part Number: PMP41009 Other Parts Discussed in Thread: UCC28740-Q1 Hi: I designed a flyback converter with reference to PMP41009. However, the circuit does not work properly. The initial state HV pin and VDD pin waveform is shown in Figure 1.Their…
    • Resolved
    • over 1 year ago
    • Power management
    • Power management forum
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