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  • UCC28780EVM-002: low power efficiency

    Resolved
    Part Number: UCC28780EVM-002 Other Parts Discussed in Thread: UCC28780 Hi experts, I am testing UCC28780EVM-002 with 90Vac(60Hz) input and 45w@20V 2.25A output ,but the power efficiency is much lower than that in EVM user‘s guide. I wonder what cause…
    • Resolved

  • UCC28780EVM-002: How to let UCC28780EVM-002 Vo change to 12V

    TI Thinks Resolved
    Part Number: UCC28780EVM-002 Other Parts Discussed in Thread: TL431 , UCC28780 Hi Team UCC28780EVM-002 directly modify the TL431 voltage divider resistor "R24 to 38.3KΩ" will become 12V output, do other parts need to be modified?

  • UCC28780EVM-002: Modifying UCC28780EVM-002 by dropping output voltage from 20V to 10V, and eventually 5V.

    Part Number: UCC28780EVM-002 Other Parts Discussed in Thread: UCC28780 Hi Experts, Good day. I need your help. Our customer currently has a UCC28780EVM-002, and they are trying to modify it to their liking, specifically dropping the output voltage from…

  • UCC28780EVM-002: Duty Cycle

    TI Thinks Resolved
    Part Number: UCC28780EVM-002 Other Parts Discussed in Thread: UCC28780 Hi, Good Day. The customer is currently running tests and evaluating the board UCC28780EVM-002. He is looking to change the duty cycle on the PWML and the PWMH on the controller itself…

  • UCC28780EVM-002: Vdd Fault

    TI Thinks Resolved
    Part Number: UCC28780EVM-002 Other Parts Discussed in Thread: UCC28780 Hello E2E Experts, Good day. I am currently looking for help with my UCC28780EVM-002. It seems I am getting a fault delay while measuring at Vdd, and am getting 0 V of output instead…
    • Answered

  • UCC28780EVM-002: Unable to start up

    Resolved
    Part Number: UCC28780EVM-002 Hi, Customer have encountered issue regarding the EVM, please see details below. I first tried to power it up with 120VAC/60Hz (No Load at Output), but the input AC current suddenly goes very large (~8A according to the AC…
    • Resolved

  • UCC28780EVM-002: Controller turn ON with external Aux voltage to test my custom transformer.

    TI Thinks Resolved
    Part Number: UCC28780EVM-002 Other Parts Discussed in Thread: UCC28780 Dear Sir, I am planning to design a planar transformer, target operating freq was 500khz. To test this and to know the transformer output voltages. I brought the UCC28780EVM. Initially…
    • Answered

  • UCC28780EVM-002: UCC28780 EVM-002

    Resolved
    Part Number: UCC28780EVM-002 Other Parts Discussed in Thread: UCC28780 I'm a student who is studying by purchasing the UCC28780 EVM-002. I'm studying the design of active flyback converter using UCC28780 by referring to the EVM. I plan to use another…
    • Resolved
    • Answered

  • UCC28780EVM-002: What is the size of EVM?

    Resolved
    Part Number: UCC28780EVM-002 Hi What is the size of EVM(UCC28780EVM-02)? 1. Total size of EVM 2. White silk(picture) Thanks
    • Resolved
    • Answered

  • RE: UCC28780: ucc28780EVM-002 GERBER FILES

    Resolved
    Yunsheng: Yes, we reviewed the file Jaden sent. The file with .7z extension is for UCC28782EVM-030 board. and its pcb files are indeed online. BUT. What we got with us is UCC28780EVM-002, The only document we can get from the website for this EVM is the…

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