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  • UCC25661: UCC25661 OVP/OTP Pin Voltage Not Rising – Bring-Up Issue

    Part Number: UCC25661 Hello TI Support Team, I’m currently bringing up a UCC25661-based LLC design and I’m seeing unexpected behavior on the OVP/OTP pin . The pin does not establish a non-zero voltage when powering the device via VCCP, preventing normal…

  • UCC25661-Q1: UCC25661-Q1 for Full Bridge LLC Control

    Part Number: UCC25661-Q1 Hi TI Team, I am Evaluating the DC-DC stage for a 3kW EV On-Board Charger (OBC) and plan for migration from the NCP1397 to the UCC25661-Q1. Given the 3kW power requirement, this will be implemented as a Full-Bridge LLC topology…

  • UCC25661: UCC25661: Suitability for 24S Battery (66V-101V, up to 120V Spikes) and 500W High Transient Motor Loads in LLC Topology

    Part Number: UCC25661 Hi TI Power Management Team, We are currently designing a 500W (48V output) isolated DC-DC converter for a highly dynamic robotics application. We are considering the UCC25661 family for an LLC Resonant + Synchronous Rectification…
    • Answered

  • UCC25661: UCC25661 Light Load configuration pin (LL-Pin)

    Resolved
    Part Number: UCC25661 Hello, I am replacing the obsoleted UCC25660-2 with a UCC25661-2 part and are having expected random bursting at light load (~10%). Initially another engineer was working on the issue, and it has been reassigned to me. I…
    • Resolved

  • UCC25661: Soft-Start Recommendation for UCC25661 with Large Output Capacitance

    TI Thinks Resolved
    Part Number: UCC25661 Other Parts Discussed in Thread: TL431 Hello everyone, I am currently working on a resonant power supply design based on the UCC25661 from Texas Instruments and I am facing challenges with softstart behavior when using a large…

  • UCC25661-Q1: UCC25661-Q1 used as LLC full-bridge

    TI Thinks Resolved
    Part Number: UCC25661-Q1 Hi Expert, Have a good day! I find UCC25661-Q1 can be used as LLC full-bridge. Do you have the reference design of this usage? Thanks! Best Regards, Leo

  • UCC25661: UCC25661 based Full Bridge LLC

    Part Number: UCC25661 Tool/software: how to use this IC to implement Fullbridge LLC , is there any application note or reference for guidance

  • UCC25661: Simulation Model for UCC25661

    TI Thinks Resolved
    Part Number: UCC25661 Other Parts Discussed in Thread: UCC25660 Tool/software: Do we have a simulation model of UCC25661 , if spice model is not available is it possible to get symbolic model.

  • UCC25661: UCC25660 UCC25661

    TI Thinks Resolved
    Part Number: UCC25661 Other Parts Discussed in Thread: UCC25660 , Tool/software: Hi Sir, When will TI release the simulation model of UCC25660 and UCC25661? Thanks.

  • UCC25661: UCC25661 LLC Converter – No Output at No-Load (Request for Design Review & Debug Guidance)

    Part Number: UCC25661 Hello TI team, I’m using the UCC25661 resonant controller in a custom LLC converter design and would appreciate a design review and guidance on startup behavior. Despite switching activity on the half-bridge, I’m seeing no output…

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