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  • UCC28951: Troubles Getting to Steady-State

    TI Thinks Resolved
    Part Number: UCC28951 Other Parts Discussed in Thread: TINA-TI Tool/software: Hello, I've attached the file I'm using to simulate as well as the google design sheet provided by TI. A couple of specs: Pout = 500W Vout = 400VDC Vin = 410VDC …

  • UCC28951: Maximum frequency at SYNC in follower mode

    Part Number: UCC28951 Tool/software: Hello, The datasheet of UCC28951 (page 33) mention that SYNC frequency must be greater than or equal to 1.8 times the converter frequency, but what is the maximum limit? Regards

  • UCC28951-Q1: Duty cycle adjustments at lower loads.

    Part Number: UCC28951-Q1 Tool/software: Hello mike. I'm trying to adjust compensation and TMin values and have bought the board to this stage. Below I'm attaching waveforms and videos. This is higher voltage lower loads currents. Vin : 600V, ILoad…

  • UCC28951: Maximum frequency at SYNC in follower mode

    Part Number: UCC28951 Tool/software: Hello and thank you for your support, I guess my question was not clear. The minimum limit is 1.8 times the switching frequency, and the maximum is x times the switching frequency, what is the value of x? For…

  • UCC28951: Pspice for TI model of UCC28950 does not work

    Part Number: UCC28951 Other Parts Discussed in Thread: UCC28950 Tool/software: Hello, This is first time I use PSpice for TI. I want to simulate phase shift full-bridge converter using UCC28950/28951. In the TI library of Pspice for TI, there is UCC28950_TRANS…
    • Answered

  • UCC28951-Q1: PMP8740 - CC CV control circuit

    Resolved
    Part Number: UCC28951-Q1 Other Parts Discussed in Thread: PMP8740 , UCC28950 Tool/software: I want to understand the working and design of CC CV control circuit in PMP8740 reference design, but design guide is not available for this reference design.…
    • Resolved

  • UCC28951: Excessive MOSFET Heating in a PSFB Converter with Current Doubler Topology Using UCC28951PWR

    TI Thinks Resolved
    Part Number: UCC28951 Tool/software: Hello everyone, I am designing a PSFB converter with a current doubler topology in the rectification stage, using the UCC28951PWR controller. For the rest of the circuit, I am following the topology from the datasheet…
    • Answered

  • UCC28951: cc/cv 5kW PSFB charger

    Resolved
    Part Number: UCC28951 Tool/software: Hi, How could I access to the 'slup348' design review ? I can't reach the link you often give on this forum : https://www.ti.com/seclit/ml/slup348/slup348.pdf . Thanks,
    • Resolved

  • UCC28951-Q1: LTspice Too few nodes with UCC28950_Trans

    TI Thinks Resolved
    Part Number: UCC28951-Q1 Tool/software: am trying to simulate a circuit with "UCC28951-Q1" on LTSpice. I downloaded the PSpice file from https://www.ti.com/lit/zip/slum169 . I created a symbol from the subcircuit in the library file and edited it a…

  • UCC28951: Debug PSPICE simulation

    TI Thinks Resolved
    Part Number: UCC28951 Hey Team, My customer is trying to simulate with the UCC28951 PSPICE simulation model but is having some issue. They are trying to test features such as: External shutdown & start-up Adjustable delay setting Peak current…

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