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  • UCC25640EVM-020: UCC25640EVM-020

    TI Thinks Resolved
    Part Number: UCC25640EVM-020 Other Parts Discussed in Thread: UCC256404 Tool/software: Hi TI team I am using UCC25640EVM-020 for testing the LLC. The default start up input voltage is 360V and i want to start the LLC converter at 100V input. (PFC o/p…

  • UCC25640EVM-020: UCC28180EVM-573 connect to UCC25640EVM-020

    TI Thinks Resolved
    Part Number: UCC25640EVM-020 Other Parts Discussed in Thread: UCC28180EVM-573 Tool/software: Hi, I would like to confirm the test setup for connecting PFC controller ( UCC28180EVM-573) to UCC25640EVM-020 are as follow: 1. AC input will be at J1 UCC28180EVM…
    • Answered

  • UCC25640EVM-020: UCC256404 startup slowly or not starts with load

    Resolved
    Part Number: UCC25640EVM-020 Other Parts Discussed in Thread: TL431 , Tool/software: Hello. I have problem to start modified eval board UCC25640EVM-20. Secondary part is dosconnected - from transformer, feedback optocoupler too. I need to design output…
    • Resolved

  • UCC25640EVM-020: UCC256404 optocoupler FB pin source current

    TI Thinks Resolved
    Part Number: UCC25640EVM-020 Other Parts Discussed in Thread: UCC256404 , UCC256402 , TLV431 Tool/software: Hi TI team In UCC25640EVM-020 VO618A optocoupler is used. As per the design the opto LED current is (12V-1.2V)/9.09Kohm = 1.18mA. The CTR of VO618A…

  • UCC25640EVM-020: Power management forum

    TI Thinks Resolved
    Part Number: UCC25640EVM-020 Other Parts Discussed in Thread: UCC256404 Tool/software: Hi TI team Greetings! We are planning to use 400V to 12V LLC converter using UCC256404 IC. In order to have tight CTR tolerance wrt ageing we have planned to use optoemulator…
    • Answered

  • UCC25640EVM-020: QUESTION : Schematic part for standby mode

    Resolved
    Part Number: UCC25640EVM-020 Other Parts Discussed in Thread: UCC256403 Tool/software: Hello TI, I have several questions about EVM for the UCC25640X: 1- What is the purpose of the standby function? Is the UCC25640X required to have an external circuit…
    • Resolved
    • Answered

  • UCC25640EVM-020: Is it possible to use single resonant capacitor

    Resolved
    Part Number: UCC25640EVM-020 Other Parts Discussed in Thread: UCC256403 Dear Specialists, My customer is considering UCC256403 and has a question. According to the related thread, the split resonant capacitor has some merits, AC current requirements, AC…
    • Resolved

  • UCC25640EVM-020: Min DC voltage into eval board?

    TI Thinks Resolved
    Part Number: UCC25640EVM-020 I have an application where the input power into this regulator (bypassing the PFC section) will be rectified chopped (phase-cut) AC. The portion of the sine-wave coming in may be heavily chopped down, which means a low DC…
    • Answered

  • UCC25640EVM-020: Does not work properly with open loop control by using application note (sluual2)

    Resolved
    Part Number: UCC25640EVM-020 Dear Specialists, My customer is evaluating UCC25640EVM-020 and has a question. I would be grateful if you could advise. --- Open loop control using UCC25640EVM‐020 does not work correctly. Open loop is described in application…
    • Resolved

  • UCC25640EVM-020: Why split resonant capacitor used

    TI Thinks Resolved
    Part Number: UCC25640EVM-020 Hello, I wanted to understand the value of resonant capacitor from below schematic of reference design UCC25640EVM-020. C1 and C17 both are resonant capacitor in split or only C17 is the resonant capacitor. If split is the resonant…

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