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  • UCC25640EVM-020: how to change standby Vout

    TI Thinks Resolved
    Part Number: UCC25640EVM-020 Hello, customer don't want to reduce Vout in standby mode and want to stay with 12V. What to change? Also is there formular to adjust standy Vout? Regards, Holger

  • UCC25640EVM-020: Gerber File

    TI Thinks Resolved
    Part Number: UCC25640EVM-020 Hi, Good day. Our customer is looking for the gerber file for the UCC25640EVM-020. Can you please help us provide this? Thank you. Regards, Cedrick

  • UCC25640EVM-020: Condition about AC input voltage with no PFC

    Part Number: UCC25640EVM-020 Other Parts Discussed in Thread: UCC256402 , UCC256404 I considering UCC256402 and UCC256404, unused PFC condition. (Low output power) Can UCC25640x use AC 85V~265V input without PFC? I think that LLC condition is narrow Vin…

  • UCC25640EVM-020: Over load protection

    Part Number: UCC25640EVM-020 Other Parts Discussed in Thread: UCC25600EVM , UCC25600 , UCC256402 Dear Sir, I am working on UCC25640EVM-020 and UCC25600EVM evaluation boards, to design wide input range dc to dc convertor using LLC topology. Input v oltage …
    • Answered

  • UCC25640EVM-020: Functionality Questions

    Resolved
    Part Number: UCC25640EVM-020 Other Parts Discussed in Thread: UCC256404 , UCC256402 , UCC256403 , TL431 On the EVM, when HV pin is tied to PGND and VCC supplied by an external source, the EVM doesn't function at VCC = 24V; but it does when VCC is 26V.…
    • Resolved

  • UCC256402: Changing Switching Frequency

    TI Thinks Resolved
    Part Number: UCC256402 Other Parts Discussed in Thread: UCC25640EVM-020 , Hello, We're working with the UCC256402 controller and the UCC25640EVM-020. We would like to increase the switching frequency on the EVM. Do we do this with LSS pin? I tried using…

  • UCC256402: higher current draw at low Vin

    TI Thinks Resolved
    Part Number: UCC256402 Other Parts Discussed in Thread: UCC256404 , UCC25640EVM-020 Hello, We are using the UCC256402 in a DC input application (70 - 120V) and seeing higher current draw when we bring the input lower than 95V. We have been modifying the…
    • Answered

  • RE: UCC28180EVM-573: PF issue when connected the UCC28180EVM-573 and the UCC25630-1EVM-291

    Resolved
    Hi, I would recommend using our latest generation LLC controller (UCC25640x) EVM. Here is the comparison table for LLC controllers: Please find the links below to our latest gen LLC controller datasheet and it's EVM: UCC256404 data sheet, product…
    • Answered

  • PFCLLCSREVM034: Regarding the resonant inductor and resonant capacitor in the LLC stage and leakage inductor of the transformer

    Resolved
    Part Number: PFCLLCSREVM034 Other Parts Discussed in Thread: UCC256404 , UCC25640EVM-020 Dear Sir/Madam, I have purchased and tested the evaluation board PFCLLCSREVM034, its performance is very good. After reading the user guide and datasheet of the UCC256404…
    • Resolved
    • Answered

  • RE: UCC256404: Terminal open short test data

    Resolved
    Hi, I have tested the UCC256404 EVM ( UCC25640EVM-020 User Guide (Rev. B) (ti.com) ) under both open circuit and over current conditions. Here are the EVM specifications: Case 1: Following figure shows the LLC open circuited waveforms: Channel 1: Input…

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