KL720 power pin decouping and filter
Dear Sir,
I have some questions regarding to power domain and power decoupling, filtering:
1/ If I do not use the USB 2.0 interface, Could I not supply power and decoupling capacitors for USB 2.0 power pins? Same for interface in bank 3?
2/ Using the Ferrit bead to isolate between power rails is needed, right? But Figure 3 - Power topology: KL720 bypass capacitors in the KL720 HW design guide v0.2, do not show the ferrite bead between power rails. Could you say me what is right/recommended?
In demo board design
Figure 3 - Power topology: KL720 bypass capacitors in the KL720 HW design guide v0.2
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Comments
Hi,
Thanks Eddie Kuo.
" We apologize for any inconvenience caused. The use of the Bead component is necessary in the circuit design. We will amend the documentation accordingly. Thank you for bringing this to our attention. "
==> When the document is done, could you share it with me? We need to check and update to KL720 power decoupling and filtering in our design. We are using the KL720 269-Ball package.
Hi,
The document update request is in progress. Please keep an eye on Kneron Developers. The package you are using is BGA269, and you can follow the design method of the Demo board.
Thanks Eddie.
I am copying the power decoupling and filtering section the Demo board rev 03 for our design. Is this the latest version of demo board?
Besides, I could not find information of ferrite bead ( P/N: BS1005UA 102A03 ). Could you provide me recommended parameters of Ferrite bead or any recommended ferrite bead P/N that could be found on market?
Same as for inductors in the MP5424-0010 power section.
Hi
Please reference attachment files
Thanks Eddie.