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  • 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…

  • UCC28750-CALC: UCC28781-Q1 decrzpted simulation Model for Symetrix

    TI Thinks Resolved
    Part Number: UCC28750-CALC Other Parts Discussed in Thread: UCC28781-Q1 Hello, Do we have a decrypted version of the Model which cis compatible with symetrix for the UCC28781-Q1? PS. I could selected the right device on the drop list so I have picked…

  • UCC28781-Q1: Low Input Voltage Range Startup vs. Minimum Operating Voltage Offline Flyback Converters

    TI Thinks Resolved
    Part Number: UCC28781-Q1 Other Parts Discussed in Thread: UCC28781 Hi, Looking at wide voltage AC/DC supply based around the UCC28781. Reviewed some E2E threads on custom operating voltages. UCC28781: Voltage input range - Power management forum…
    • 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

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