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  • UCC28742: Formula derivation

    Resolved
    Part Number: UCC28742 Hi Experts: Customers want to know how to derive the fomula below and especially why is there a "2" here? Thank you.
    • Resolved

  • UCC28742: OVP and VDD from design spreadsheet tool

    Part Number: UCC28742 Hi, I have a few questions about the default example in the design spreadsheet Q#1 In the design calculator, the overvoltage thresholds are VOUT_OVPnom = 5.3V and VOUT_OVPmin = 5.023V (calc cell C191). VOUT_CV = 5V, VOUTripple = 50…
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  • UCC28742: possible typos in datasheet or design spreadsheet tool for Lp_rcmd and VDbias_blocking

    Resolved
    Part Number: UCC28742 Hi, 1. Equation 14 for Lp calculation in the datasheet (pg26 datasheet) uses Ipp_max but in the calc tool (cell C92 of calculations tab) it uses Ipp_nom . Which one is the correct equation? 2. VDbias_blocking (cell C147 of calculations…
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    • Answered

  • UCC28742: the roadmap question on flyback controller

    Resolved
    Part Number: UCC28742 Hi expert team I'm Joe, GZ FAE and my account is SAJ. The EE of my account is solar inverter and battery inverter. Typically they use flyback to build an auxiliary power to make an isolated power for the control circuit. The…
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  • UCC28742: UCC28742 without AUX winding solution consult.

    TI Thinks Resolved
    Part Number: UCC28742 Other Parts Discussed in Thread: UCC28C42 Hi Experts, Can UCC28742 work normally without AUX winding? With VDD connected to a 24V DC voltage source. Is there any reference design? Will the start-up action be affected? Is there any…
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  • UCC28742: Searching TI solution

    Resolved
    Part Number: UCC28742 Other Parts Discussed in Thread: LM5023 , UCC28600 Hi Team, There is a good new that Customer is searching TI solution Do we have a product that can compete with "LD5523EGL" ? https://www.leadtrend.com.tw/images/cgcustom…
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  • UCC28742: UCC28742 design document

    TI Thinks Resolved
    Part Number: UCC28742 How to decide the power on delay time so to calculate the start-up resistance to charge VDD capacitance?
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  • UCC28742: UC28742 Start-Up

    Resolved
    Part Number: UCC28742 Dear members, We used UCC28742 in our design and we faced to a question. We used TLP181 and LM4041 in the loop regulator. I will insert some photos to make the problem more understandable. The probes are placed like in the following…
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  • UCC28742: UCC28742 and transformer connection

    TI Thinks Resolved
    Part Number: UCC28742 Hello I am desiging a non isolated capacitor charger circuit usings UCC28742 controller; so in our design notes of our old design i saw the transformer is conencted in diffirent ways ; could you explain why ? and what is the diffirence…
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  • UCC28742: UCC28742 frequency question

    Resolved
    Part Number: UCC28742 Hi Team, My customer is using UCC28742 for a 12V 4A application. Now we have an issue that the switching frequency is always clamped at 25KHz in full load or a lighter load (but prefer to be @~ 65KHz in full load). I checked the…
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