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  • UCC256404: Regarding the UCC256404 PMP31179 Project

    TI Thinks Resolved
    Part Number: UCC256404 Other Parts Discussed in Thread: PMP31179 , UCC28065 I need the specifications: AC: 90–264V, 40–440Hz DC: 28V, 600W Which part specifications (part numbers) on the BOM need to be modified?

  • UCC256404: UCC256404 review schematic

    Part Number: UCC256404 Other Parts Discussed in Thread: UCC28056 Hello, The customer is developing a medical power supply. 220V AC voltage input, output power of 80W, output voltage of 24V, output current of 3.3A. Customers use UCC256404 and UCC28056…

  • UCC256404: UCC256404 Isns question

    TI Thinks Resolved
    Part Number: UCC256404 I'm currently designing a LLC halfbridge, using the UCC256404. The design is complete, and works well, but I am attempting to understand the OCP3 behavior. Ideally, what I'd like is an equation that will give me the allowable output…

  • UCC256404: UCC256404

    Part Number: UCC256404 Tool/software: Hello TI Team, I am using UCC256404 llc resonant controller for my AC to DC converter with out PFC.My input voltage range is 103VAC to 127VAC,50W converter .I am facing startup issues with full load,I kept the…

  • UCC256404: UCC256404: I have a problem with the boot of the UCC256404

    Part Number: UCC256404 Tool/software: According to the UCC256404's technical specifications, pin 1 is the HV input, and after feeding the PFC out line to this input with its resistors, a 13V LDO output should appear on RVCC pin 12. In my case, there is…

  • UCC256404: Abnormal fsw,start when Soft-Start

    Part Number: UCC256404 Other Parts Discussed in Thread: TEST2 HI TI Team, The customer using the UCC256404A found that pairing the LLC with different models of MOSFETs can cause the fsw,start during soft start to behave abnormally. Do you know why this…
    • Answered

  • UCC256404: UCC256404B X-Cap Discharge at Higher Line Frequencies

    Resolved
    Part Number: UCC256404 Other Parts Discussed in Thread: PMP31179 Hi TI Team, I am designing a 250W power supply and for the LLC controller, I am interested in using the UCC256404B. However, I was reading in the datasheet about the X-Capacitor discharge…
    • Resolved
    • Answered

  • UCC256404: upper limit for the filter capacitor

    Resolved
    Part Number: UCC256404 Hi TI Team, Is there a recommended upper limit for the filter capacitor on the ISNS pin? Thanks.
    • Resolved

  • UCC256404: UCC256404

    TI Thinks Resolved
    Part Number: UCC256404 Tool/software: I found new problem with my design with UCC256404. When running device output is connected to load 80V / 4A, and load is disconnected, feedback primary (before optocoupler) is broken. There are destroyed zener diodes…

  • UCC256404: UCC256404 HB -LLC always in burst mode

    Part Number: UCC256404 Other Parts Discussed in Thread: UCC25640EVM-020 , ISOM8110 Tool/software: Hi We have implemented a power supply of 100W PFC +LLC using UCC2818EP and UCC256404. When we tested our PCB it is giving us less efficiency than the…

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