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  • TI Thinks Resolved

TINA/Spice/UCC28710: Flyback AC/DC simulation problem

Part Number: UCC28710

Tool/software: TINA-TI or Spice Models

Hi,

I built a AC/DC 5V/2A  flyback circuit with UCC28710 transient model, and its schematic is to duplicateevaluation board PMP9202 with simplified components in the input and output.

Some diodes and the primary side HV-MOS model was collected and put in the simulation.

But the simulation result shows the primary side HV-MOS could not be switched continuously that no output was found.

Attached are the result and TINA .TSC file, could anyone help take a look on this simulation ? I appreciate if there is any comment on this.

Thank you. 

Flyback_UCC28710_PMP9202.zip

  • Hello,

    I downloaded the TINA model from web and modified it to make it like your application test bench. It runs fine with all the extra components and value changes you had. I am attaching the modified circuit here, with screen shoot of  UCC28710_PMP9202.tscwaveform 

  • I suggest to start from the circuit I sent and do any further modification to this circuit . Also note that I run the transient with initial conditions.

    Kind Regards,
    Arash Loloee
  • In reply to Arash Loloee:

    Hi,

    Thanks for your help, looks like the main problem is transformer sub-ckt.
    The simulation run well with modified sub-ckt, and could produce the same result as I want.

    Thank you.

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