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  • RE: UCC256403: Maximum switching frequency

    Resolved
    Manikanta Pallantla said: Coming to the standby operation, UCC25660 does have the burst mode operation. So, I would still recommend using this new controller at such a high switching frequency. I cannot use burst-mode due to EMI. Manikanta Pallantla said…

  • RE: UCC256403: Open loop oscillation

    The above observation was wrongly mentioned as UCC256403 instead of UCC28950-q1

  • UCC256403: some questions

    TI Thinks Resolved
    Part Number: UCC256403 Tool/software: Hi Sir : I have the following questions regarding this chip ： Question 1: Is there any way to determine the design margin of OCP2/OCP3 for this chip through testing or theoretical calculations? Question 2: Will the…

  • UCC256403: Feedback network, current transfer ratio and IFB current

    Part Number: UCC256403 Other Parts Discussed in Thread: TLV431 Tool/software: The VFBreplica voltage and the IFB current is a bit unclear in the datasheet for UCC256403. Since the datasheet is lacking in information, I've scanned the TI forum for answers…
    • Answered

  • UCC256403: Gate voltage spike at the HIGH SIDE MOSFET for UCC256403

    Resolved
    Part Number: UCC256403 Tool/software: In the example simulation for UCC25640x (given by slusd90 - june2019) ideal switches are used instead of HIGH side and LOW side MOSFETs. In this simulation model there's no problem getting clean waveforms with high…
    • Resolved

  • UCC256403: Inquiry about peripheral parts used for UCC256403

    TI Thinks Resolved
    Part Number: UCC256403 Other Parts Discussed in Thread: UCC25630-1EVM-291 Tool/software: Thank you for your continued support. My name is Kurata. I have the following question about the parts used in the peripheral circuit of UCC256403. In the example…

  • RE: UCC256403: Undeterministic behaviour burst-mode

    Hemanth Sreeperumbudur said: I entered RBW value to be 0kohm and 1uA as initial current in the default circuit downloaded from web. I don't see burst mode until the load is applied, when the load is applied, continuous switching is observed. However, once…

  • UCC256403: Burst mode disable in UCC256403

    Part Number: UCC256403 Tool/software: Dear Experts I have tried with the values in the range that disable the burst mode. But burst mode is not disable. Another thing I observed that after removing upper resistor of BW. I observed that burst mode is…

  • UCC256403: Burst mode disable in UCC256403

    TI Thinks Resolved
    Part Number: UCC256403 Tool/software: What are the ways to disable the burst mode at the defined output current? I have tried with selecting option as per the datasheet but I have observed at burst mode is not Disable and output voltage is controlled…
    • Answered

  • UCC256403: Transformer Proximity effect AC resistance calculation

    Resolved
    Part Number: UCC256403 Tool/software: Hi TI Experts, I have designed 1.5KW LLC DC/DC converter using UCC246403 after my PFC stage. I have to gain 3% more efficiency to meet my requirement. My HF transformer details are below. Core= PQ4040 Np/2=12Turns…
    • Resolved

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