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  • UCC28730: May I ask how UCC28730 can measure the phase & Gain waveform ?

    Part Number: UCC28730 Hi Team May I ask how UCC28730 can measure the phase & Gain waveform as follows, how to connect the external instrument on the SCH? The datasheet only shows how to calculate, but the customer wants to measure from the outside…

  • UCC28730-Q1: Query regarding output current tuning of PMP22557

    TI Thinks Resolved
    Part Number: UCC28730-Q1 Other Parts Discussed in Thread: UCC28730 , PMP22557 , , TPS40210 , TPS40210-Q1 Dear TI e2e Team, We got the reference design from evaluation board (PMP22557) with part number of UCC28730. In that design given input voltage range is…
    • Answered

  • UCC28730-Q1: Problem with importing UCC28730 MACRO in to TINA

    Resolved
    Part Number: UCC28730-Q1 Other Parts Discussed in Thread: UCC28730 , UCC24650 Hi there, I downloaded UCC28730 spice macro from this link . But when I try to import to TINA, an error message pops out: Same for UCC24650 from the same zip file. The only transformer…
    • Resolved

  • UCC28730: Require reference PSpice model circuit on UCC28730

    TI Thinks Resolved
    Part Number: UCC28730 I am trying to simulate the part UCC28730 on Pspice for TI by using model given in its library But unable to get DRV Signal, voltage level at HV, VCC, VS and CS pins is as defined in electrical characteristic of part as per data…
    • Answered

  • UCC28730: Maximum frequency of UCC28730

    Resolved
    Part Number: UCC28730 Hi, I am designing a Flyback-converter and am cuurently planning to use the UCC28730. How does the controller behave, when the maximum duty cycle is reached at a lower frequency then the 83kHz maximum frequency of the controller? For…
    • Resolved

  • UCC28730-Q1: UCC28730-Q1

    TI Thinks Resolved
    Part Number: UCC28730-Q1 Other Parts Discussed in Thread: UCC28730 Hi From the simulation result, controller will stop working(no DRV) when VOUT rise to the design value 12V, it looks like the VS level is above 4.6V and trigger the OVP, I want to consult…
    • Answered

  • RE: UCC28730-Q1: UCC28730-Q1

    Resolved
    Hi, Rick: Glad to hear that you found the caused. My thinking is there might be some components is set initial properly. So it makes simulation errors during the simulation. For more detail, please consults Cadence. I thought they would share the correct…
    • Answered

  • UCC28730-Q1: UCC28730-Q1

    Resolved
    Part Number: UCC28730-Q1 Other Parts Discussed in Thread: UCC28730 Q1: Why Rs2 is not present in below formula? I think Ivsl(run) go both RS1 and Rs2, isn't it ? Q2, I am doing the design from DC input and the VIN(min) is as low as to 50V,output is…
    • Resolved
    • Answered

  • UCC28730-Q1: UCC28730-Q1

    Resolved
    Part Number: UCC28730-Q1 Hi, Q1: I don't understand why Dmax is derived at fmax? From below formula, the duty cycle is minimum when switch frequency is maximum, isn't it? : Q2: I don't understand the principle why Dmagcc is fixed internally…
    • Resolved

  • UCC28730-Q1: Does the UCC28730 *NEED* the UCC24650 to start, or will it run alone?

    TI Thinks Resolved
    Part Number: UCC28730-Q1 Other Parts Discussed in Thread: UCC28730 , UCC24650 , Every schematic I see with the UCC28730 always has a wake-up UCC24650 on the secondary side. Is this needed? Will the flyback work without it? For example if I have a diode,…

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