LM5180: Not getting desired Output signal

Abhilash Sirpa

Prodigy 80 points

Part Number: LM5180

Hello,

For our new design, we have selected LM5180 for flyback.

Vin- 5V to 60V

Vout 16V

Iout 0.3A

Now i built the schematic in PSPICE and trying to simulate, but i am getting the exact Signal at the Output.

Can anyone help me out with corrections.

Regards,

Abhilash

over 5 years ago

0 Andy Chen over 5 years ago

TI__Mastermind 27115 points

Hi Abhilash,

I suggest you to use Webench on TI website to simulate the design with LM5180 first, then copy the circuit in PSPICE for further analysis.

0 Abhilash Sirpa over 5 years ago in reply to Andy Chen

Prodigy 80 points

Hello Chen,

Thanks for your Reply, I have taken the complete circuit as per calculation Excel tool provided by TI for LM5180 (also verified the calculations with data sheet), I have also carried out Parameter sweep of Feedback resistor still for whole range iam getting the same result.

Regards,

Abhilash

0 Andy Chen over 5 years ago in reply to Abhilash Sirpa

TI__Mastermind 27115 points

Hi Abhilash,

Pls check below thread to see if any help on right PSPICE model and speed up simulation:

https://e2e.ti.com/support/tools/sim-hw-system-design/f/234/t/814419?TINA-Spice-LM5180-Unencrypted-spice-model-needed-urgently&keyMatch=LM5180&tisearch=Search-EN-Support

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LM5180: Not getting desired Output signal