Search tips
Showing 36 results View by: Thread Post Sort by

  • UCC28781-Q1: UCC28781

    Other Parts Discussed in Thread: UCC28781-Q1 , UCC28782 , UCC28781 Tool/software: Hi, I am designing isolated DC to DC converter for EV 2w/3w automotive application with following specification. Electrical: DC-DC Converter (72V to 12V) Input Voltage…
    • Answered

  • UCC28781: About adaptive ZVS control

    Resolved
    Part Number: UCC28781 Tool/software: Hi team, I have a question about adaptive ZVS control. If Vsw doesn't reach Vth(sws) within tz, the IC will make the tdm longer to make the negative Im bigger, right? What if Vsw reachs too fast to Vth(sws…
    • Resolved

  • UCC28781: Audible noise in ABM

    Part Number: UCC28781 Tool/software: Hi, The audible noise is really high when the converter is in ABM (burst mode). In AAM, there is no noise. I tried to adjust Rbur1 and Rbur2, to exit burst mode at 20% of max power. But actually it exits this…

  • UCC28781: Reflow profile

    Part Number: UCC28781 Hello, We are working on some assembly failures for the board. Do we have a recommended reflow profile for the chip? Nick
    • Answered

  • UCC28781: Can UCC28781 support 200W application without PFC?

    Resolved
    Part Number: UCC28781 Other Parts Discussed in Thread: UCC2897A Hi team Customer wants to develop 200W AC-DC with Flyback, 85V~264VAC standard input, and due to low-cost consideration, they want to use UCC28781 to finish this 200W power without PFC…
    • Resolved

  • UCC28781-Q1: Max Power Conversion possible with UCC28781

    TI Thinks Resolved
    Part Number: UCC28781-Q1 Other Parts Discussed in Thread: UCC28781 , , UCC28782 Hello, Pout <400W is possible to achieve with UCC28781 IC, with Single stage PFC Forward converter? Is Simulation model available for this IC? Thanks

  • UCC28781-Q1: Calculating VBUR target voltage VBUR_tgt

    TI Thinks Resolved
    Part Number: UCC28781-Q1 Other Parts Discussed in Thread: UCC28781 , UCC28782 Hello, I am going through the design steps in the datasheet of UCC28781-Q1 to design a AC - DC converter. But I am stuck at VBUR calculations in 8.2.2.4 which says "The…
    • Answered

  • UCC28781: 65W Adpater topology choice

    Resolved
    Part Number: UCC28781 Other Parts Discussed in Thread: UCC28782 Dear Experts, I am in search of a topology for a 65W adapter with Power Delivery (PD) functionality. I am currently considering two topologies: Active Clamp Flyback (ACF) and Active High…
    • Resolved

  • UCC28781: Maximum input voltage

    TI Thinks Resolved
    Part Number: UCC28781 Hello TI, Is there an input overvoltage protection? I have a dual 24V 0.85A and 24V 0.18A output transformer with Vin 30-72V. As i reach 85V, it starts to make some strange noise and at around 86V it stops switching, then…

  • UCC28781: Suitable Flyback controller

    TI Thinks Resolved
    Part Number: UCC28781 Other Parts Discussed in Thread: UCC28782 Hi Team, My customer is surveying suitable Flyback controller solution to meet - 347~480Vac_in / 60Vdc_out / 90W requirement Do you have any suggestion here? Thanks.

Didn't find what you are looking for? Post a new question.