UCC28950: How to choose the right EMI filter section , inrush protection components for the UCC28950 based psu?

Mikail

Part Number: UCC28950

Hi team ,

I've sent UCC28950 based circuit to the PCB company i will start the tests shortly. I want to design the EMI section until the circuit arrives.
I just wanted to ask if you can help me with the choose the right components for the input filter , maybe how to calculate them or some giving some advise?
I'm searching on internet and many people say that this section is defined by the " trial-and-error method" and this came a little unhealty methot to me ,therefore is that ı'm asking this question.

Project detail ;

Vin_min =140Vac , Vin_nominal=220Vac Vin_max=240Vac , V_out=0-30V(adj) , P_out=750Watts

Thank you all so much.

Mikail Unal

Best Regards

over 5 years ago

0 Teng Feng over 5 years ago

TI__Genius 13660 points

Hi Mikail, an expert will get back to you tomorrow. Thanks —— Teng

0 Bliss Zhou over 5 years ago

TI__Expert 3470 points

it is complicated for EMI designing in power supply. there are many factors need to consider such as power stage topology, ZVS or not, input and output conditions and the structural designing, size etc. I am worry it is difficult to calculate accurately the EMI components. I also think the best way is trial-and-error method.

In addition, I want to say that ZVS can reduce the EMI noise and get better EMI performance compare with hard switch.

thanks

0 Mikail over 5 years ago in reply to Bliss Zhou

Intellectual 465 points

Thank you :)

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UCC28950: How to choose the right EMI filter section , inrush protection components for the UCC28950 based psu?