PMP21781: Need Altium design files and design update help

Faiz Majeed

Part Number: PMP21781
Other Parts Discussed in Thread: LM5155

Tool/software:

Hi!
I am trying to design 30V to 150V DC-DC boost converter and I found "www.ti.com/.../PMP21781" reference design for that. But I see that it supports around 85mA current but I need 1A current. I want to ask how can i update this design to achieve 1A current.

Also I need altium design files for that reference design.

Thank you

6 months ago

0 Darwin Fernandez 6 months ago

TI__Mastermind 41800 points

Hi Faiz,

I highly recommend using the design calculator in the LM5155 product page to help with scaling this solution to the higher power levels.

https://www.ti.com/product/LM5155-Q1#design-tools-simulation

For the altium files, these are uploaded in the "CAD" link of the reference design page. This will have the altium design files. Thanks!

https://www.ti.com/tool/PMP21781

0 Faiz Majeed 6 months ago in reply to Darwin Fernandez

Prodigy 115 points

Thank you for your reponse. I have tried the calculator. I need some help in inductor selection as it is hard to find inductor of exact specifications specially DC Resistance.

Here is the recomendation from calculator

I am able to find these two inductors around recomended values but their DCR is too high.

https://www.digikey.com/en/products/detail/pulse-electronics/PA4343-822ANLT/7943150

https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/74439387068/22677761

Can you please help me in inductor selection.

Thank you

+1 Darwin Fernandez 6 months ago in reply to Faiz Majeed

TI__Mastermind 41800 points

Hi Faiz, there are a number of inductors that you can choose from. I recommend looking at wider range of current in your search tool. I recommend double checking the voltage rating in the datasheet and the core loss as well of the inductor you end choosing. Thanks!

https://www.digikey.com/en/products/filter/fixed-inductors/71?s=N4IgjCBcoGwJxVAYygMwIYBsDOBTANCAPZQDaIALAAxwDMdIAuoQA4AuUIAymwE4CWAOwDmIAL6EAHFUQgUkDDgLEylKgCYqtCMxDtOPASPGEA7FVOz5ivIRKRy29WCoBWJqw6RufIaIngzgjQcmhYtioO4BSaFAiEYLSSMJK0IAlJpqZphPBUMObp0TDOEAkUFK6mZdGScDA54K5grrSW5XCmrvFNFW1FLakNA65VnQMwLnA9LfWSkhParuoTrWAUE9mTA6lxabr63oZ%2BJuBwdVZhSnaqMowBmpKWIdbhyvbkkgAEAK0AEkVJAA6fK-AFSIFgMGAyGmaEQ9TwkDA2hI4EUNFAyqY1yYmCYuH-GHfIkQ5KYuBIymkkBwSFUoGIml01HMrEM3Fs0YMgoMwng8BUJEuek0kVMgUi1mSqjssWyzkyoH8gay6mSqFisBA6UDbWKvVA-Fa5XCiUDdSiyWW80JS26u1Ag0ZYW0IEkyUYsUUK0DH3Gz2mokHLwgACqgn4bAA8qgALK4dDYACuvFw4geqiEABNk0g2EReEwxEA

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PMP21781: Need Altium design files and design update help