New ContributorHello,
I have just received my Arria 10AX board from my PCB manufacturer. I have 2 regulators (0.9V, 1.8V) for core and Vccio. The Vccio rail consume a lot of power, I'm looking for a hardware problem. The VCCLSENSE input pin is connected to the 1.8V rail instead of the 0.9V rail. This is not good, but can it explains the over-consumption or should I investigate for other errors?
Thank you.
Regular ContributorHi,
I think the first step is to check if the board connections were done as per the recommendations.
The VCCLSENSE and GNDLSENSE pins should be connected if required as per Table 9 in https://www.intel.com/content/www/us/en/programmable/documentation/wtw1404286459773.html#wtw1420544425270
The Pin Connection Guidelines (above link) also provides recommendation on all the other supply and GND pins.
Also refer the Power Delivery Network (PDN) tool https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/ug/ug_a10_dev_specific_pdn_tool.pdf
There are couple of training videos available on how to do the Power analysis. Please go through below links:
https://www.youtube.com/watch?v=4S1A3rHhTio
https://www.youtube.com/watch?v=_xDWT1Omy7A
https://www.youtube.com/watch?v=5IMLMiBxIKE
Regards.
New ContributorYesterday I removed the connection between VCCLSENSE and the 1.8V power plane. The power consumed on 1.8V was still huge. Using the early power estimator:
0.9V (Vcc + Vccp + Vcceram): epe 524mA, measured 211mA
1.8V (Vcch_gxbl + Vccpt + Vccpgm + Vccbat + vcca_pll + vccio): epe 110mA (measured 461mA)
This is the static power with no clock, unconfigured device. I tried to configure the FPGA and
1- It works
2- The measured static power consumption tends to the theoretical values :
600mA@0.9V (epe 524mA)
151mA@1.8V (epe110mA)
This is still quite high on the 1.8V rail. The epe is computing the static power for a configured device. I did not found any information about the unconfigured power consumption, which looks to be very high on some power rails.
Regular ContributorThis thread will be transitioned to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you
