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  • UCC28951: UCC28951 Current sense

    Part Number: UCC28951 Hello, I am designing a 2.4 kW PSFB DC-DC Converter. I am using UCC28951. I have used the excel tool provided during my power stage design, and I also used the values of the compensation network from there. I have attached the excel…

  • RE: UCC28951-Q1: spice model of ucc28951-q1

    Hi Vipin, This model for both is the same. The only difference between the -Q1 and non-Q1 is the production flow and test flow. There is no difference between the models. The difference between the UCC28950 and UCC28951 is the maximum duty cycle in current…

  • UCC28951: issue with UCC28951

    Part Number: UCC28951 Hi i am facing a problem with UCC28951 design. Its a AC to DC converter rating of 58V/40A. When i am loading more than 20A observed some disturbance in mosfet gate wave form. Please suggest what could be the problem. Attached image…

  • RE: UCC28951: Designed ONLY for DUTY and Frequency varration

    Hello, When voltage amplifier is above 2.8V you should be at 100% duty cycle. When the voltage amplifier drops below 0.8 you should obtain 0% duty cycle. However, if the on time is greater than Rtmin your zero duty cycle could happen before 0.8V. In…
    • Answered

  • UCC28951-Q1:sub-harmonic oscillation対策

    Resolved
    Part Number: UCC28951-Q1 Other Parts Discussed in Thread: UCC28951 こんにちは, E2E 現在、UCC28951を使用したPSFBコンバータの開発 に取り組んでいます。 動作周波数100KHz ですが、10kHz~20kHz の振動が出て おり、 その対策に取り組んでいます。 UCC28951のマニュアル( JAJSCJ6A )の、 7.3.11 スロープ補正 に、 低調波振動を防ぐためにスロープ補償が必要 の記載が有ります。 サブハーモニック振動 は、電流制…
    • Resolved
    • Answered

  • RE: UCC28951: What is the evaluation board UCC27714EVM-551?

    Resolved
    Hello, Are there any specific figures you are discussing, could you reference them? When it comes to taking test waveforms from FETs. I have done the following. 1. With through whole FETs you may have access to the gate, drain and source which you can…

  • UCC28951: UCC28951

    TI Thinks Resolved
    Part Number: UCC28951 Hi, Is it possible to implement current Doubler configuration (CDR) on secondary side using UCC28951?
    • Answered

  • UCC28951-Q1: Feedback before the output inductor.

    Resolved
    Part Number: UCC28951-Q1 Other Parts Discussed in Thread: UCC28951 In full bridge ZVT converter, can i take the output feedback before the output inductor. If not why. Then is there any problem will occur when we swap the gate signals of MOSFET A, B by…
    • Resolved
    • Answered

  • RE: UCC28951-Q1: UCC28951-Q1: 12V application

    Resolved
    Hello, I am sorry you rejected the answer. However, the following link will bring you to an example of designing a phase shifted full bridge with Galvanic isolation using the UCC28951. I hope this helps in your design process. https://www.ti.com/lit/ug…
    • Answered

  • UCC28951: DCDC boost converter Interleaved configuration

    Resolved
    Part Number: UCC28951 Other Parts Discussed in Thread: UCC28950 Hello, I have to design a converter where the specifications are: Vin: 42 to 75Vdc Vout: 350 to 370Vdc Output power up to 2kW Constrain: the maximum power converter height is 40mm, therefore…
    • Resolved

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