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Showing 117 results View by: Thread Post Sort by
    Answered
  • UCC28742: Formula derivation

    Skylar Li
    Skylar Li
    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
    • 27 days ago
    • Power management
    • Power management forum
  • UCC28742: OVP and VDD from design spreadsheet tool

    Kelvin Le THS
    Kelvin Le THS
    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…
    • 3 months ago
    • Power management
    • Power management forum
  • Answered
  • UCC28742: possible typos in datasheet or design spreadsheet tool for Lp_rcmd and VDbias_blocking

    Kelvin Le THS
    Kelvin Le THS
    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…
    • Resolved
    • 3 months ago
    • Power management
    • Power management forum
  • Answered
  • UCC28742: the roadmap question on flyback controller

    Joe Ji
    Joe Ji
    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…
    • Resolved
    • 6 months ago
    • Power management
    • Power management forum
  • UCC28742: UCC28742 without AUX winding solution consult.

    Marsh Cai
    Marsh Cai
    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…
    • 11 months ago
    • Power management
    • Power management forum
  • Answered
  • UCC28742: Searching TI solution

    Kygo Cheng
    Kygo Cheng
    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…
    • Resolved
    • 10 months ago
    • Power management
    • Power management forum
  • UCC28742: UCC28742 design document

    Shivani Singhal
    Shivani Singhal
    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?
    • over 1 year ago
    • Power management
    • Power management forum
  • Answered
  • UCC28742: UC28742 Start-Up

    Farzaneh Faridi
    Farzaneh Faridi
    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…
    • Resolved
    • over 1 year ago
    • Power management
    • Power management forum
  • UCC28742: UCC28742 and transformer connection

    Hector
    Hector
    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…
    • over 1 year ago
    • Power management
    • Power management forum
  • Answered
  • UCC28742: UCC28742 frequency question

    Yang Wu
    Yang Wu
    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…
    • Resolved
    • over 1 year ago
    • Power management
    • Power management forum
>

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