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

tachuan kuo

Part Number: UCC28710
Other Parts Discussed in Thread: TINA-TI,

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

over 7 years ago

0 Arash Loloee over 7 years ago

TI__Mastermind 21840 points

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

0 Arash Loloee over 7 years ago

TI__Mastermind 21840 points

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

0 tachuan kuo over 7 years ago in reply to Arash Loloee

Prodigy 20 points

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