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  • UCC2894: synchronisation issue between PFC and PWM

    Part Number: UCC2894 Other Parts Discussed in Thread: UCC28180 , , PMP7391 Hi Sir/Madam, I am working on a AC-DC converter of input 90-264v and output of 110W/24V. i have used PFC IC as 'UCC28180' and PWM as 'UCC2894' while testing the board, individually…
    • Answered

  • UCC2894: absolute maximum rated voltage

    Resolved
    Part Number: UCC2894 Tool/software: Hi, What is the absolute maximum rated voltage of the LINEOV and LINEUV pins of the UCC2894? Thank you,
    • Resolved
    • Answered

  • UCC2893: What is difference point between UCC2893 and UCC2894?

    Resolved
    Part Number: UCC2893 Other Parts Discussed in Thread: UCC2894 , , UCC2897A , UCC2891 , UCC24612 Hello guys, One of my customers is considering using UCC2893 or UCC2894 for their next products. At this moment, they have the following questions. Could…
    • Resolved
    • Answered

  • UCC2894: How to connect LINEOV pin and LINEUV pin when not using and VREF output condition

    Resolved
    Part Number: UCC2894 Other Parts Discussed in Thread: UCC2893 , UCC2891 Tool/software: Dear Specialists, My customer is considering UC2894 and has three questions. I would be grateful if you could advise. --- (1) I don't plan to use the UCC2894…
    • Resolved

  • UCC2894: Bias Power Supply for UCC2894

    TI Thinks Resolved
    Part Number: UCC2894 Other Parts Discussed in Thread: UCC2891 , UCC2893 , UCC2897A Hi Sir, As per the datasheet of UCC2894, Vdd supply is taken from the output side filter inductor, the screenshot is give below for the quick reference. Can we take…

  • UCC2894: Active clamp pulse

    TI Thinks Resolved
    Part Number: UCC2894 Other Parts Discussed in Thread: PMP7391 Hello Team, I/m working with UCC2894 PWM controller and I have referred "PMP7391" reference design of TI for active clamping circuit. The blue waveform is @TP15, yellow waveform is @ primary…

  • UCC2894: Design Files for PMP7391

    TI Thinks Resolved
    Part Number: UCC2894 Other Parts Discussed in Thread: PMP7391 , , UCC2897A Hello, Looking for Active clamp Forward (High Side) design for 300VDC to 400 VDC input with 24V / 300W output. Came across PMP7391 reference design. Need any excel or MathCad…

  • UCC2894: UCC2894D: Missing pulses during power up the circuit

    TI Thinks Resolved
    Part Number: UCC2894 Hi Team, We are powering UCC2894D externally i.e. V>12.7V @ V DD pin, V>1.25V @ FB pin (Opto IC U2 is not populated) and V>1.27V @ LINEUV pin. LINEOV is connected as per schematic given in Fig.3. Please note transformer secondary…
    • Answered

  • UCC2894: ucc2894 Vref vs temperature

    Resolved
    Part Number: UCC2894 Other Parts Discussed in Thread: UCC2897A In the datasheet, "UCC289x Current Mode Active Clamp PWM Controller datasheet (Rev. F)" Figure 18 shows the relationship between Vref and temperature. However, the y-axis values are incorrectly…
    • Resolved

  • UCC2894: Output no signal

    TI Thinks Resolved
    Part Number: UCC2894 Hello, I am trying to get ucc2894 working, but output always no signal, the IC get VDD is 13.5V, Vref 5V, LineOV less than 1.27, LineUV greater than 1.27V, the dirve signal (FB) give 4V, CS connect to GND, is there other…

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