Forum Discussion

Noobs's avatar
Noobs
Icon for New Contributor rankNew Contributor
4 days ago

PDN file and PCB decoupling

Hello, In the PDN excel file how is determined the ESR and ESL value for the decoupling capacitor ? I would like to add bigger capacitor . Is there some explanation for this file ? all the cells a...
3rd party board
Farabi's avatar
Farabi
Icon for Regular Contributor rankRegular Contributor
6 hours ago

Hello,

 

ESR and ESL is mention on each capacitor manufacturer datasheet. PDN dont mention that. 

You only put the capacitor ESR and ESL and PDN will calculate for you. 

All you need to monitor is the Zeff must be below the Ztarget all the way to feff. 

link : https://www.altera.com/design/resource/power/pdn-network

 

regards,

Farabi