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  • UCC25661: UCC25661: TSET anomaly

    Resolved
    Part Number: UCC25661 Hello, I am bringing up an LLC converter using the UCC256610 . Observing the TSET pin during start-up. we can see the programming phase happening as VCCP rises. After the programming phase however, TSET drops back to an intermediary…
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    • Answered

  • UCC25661: UCC25661 Bulk Voltage Sense Clarification

    Resolved
    Part Number: UCC25661 Can you please clarify the operation of the Bulk Voltage Sense pin operation? Referring to the datasheet SLUSG21B, Figure 7-2 inidicates a BLKStart/BLKStop comparator with a fixed threshold voltage of VBLKStop. A hystersis current…
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    • Answered

  • UCC25661: ucc25661_DataSheet

    Resolved
    Part Number: UCC25661 www.ti.com/.../UCC25661 www.ti.com/.../ucc25661 I downloaded the ucc25661.pdf file from the links above. I have a question regarding the "4. Device Comparison Table" in that document. The part numbers listed are UCC25560, UCC25561…
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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…
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  • 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…
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  • UCC25661: UCC25661: Suitability for 24S Battery (66V-101V, up to 120V Spikes) and 500W High Transient Motor Loads in LLC Topology

    TI Thinks Resolved
    Part Number: UCC25661 Other Parts Discussed in Thread: UCC28951 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…

  • 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…
    • Answered

  • UCC25661: Disabling HV start-up

    Resolved
    Part Number: UCC25661 Hi Experts, I'm supporting a UCC256616 based 500W LLC with PFC in front end application. An auxiliary 15V is supplied through VCCP pin and HV start-up was not needed. I read the datasheet but I cannot confidently confirm how…
    • Resolved

  • 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

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