Hello,
I plan to re-design a PSU I did previously to enhance performance a bit more and make better layout, bom, etc..
I decided to use polymer capacitors instead of elec. caps for buck regulator which outputs 3.3v @ 3 amps (in prev. version i had both and had to use very big elec. caps due to not so optimized layout).
I do like Panasonic polymer caps (besides quality, purple seems kinda special) and saw this one to be relatively cheap:
https://www.lcsc.com/product-detail/Solid-Capacitors_PANASONIC-6SEPC470MW_C139570.htmlhowever, I could get these:
https://www.lcsc.com/product-detail/Solid-Capacitors_Nantong-Jianghai-Capacitor-PCR0JCS471MF08LL25WP_C453509.htmlhttps://www.lcsc.com/product-detail/Solid-Capacitors_AISHI-Aihua-Group-SPZ0JM471E08O00RER8K_C160672.htmlfor significantly less while being similar specs.
My question is: is there a benefit of using Panasonic one?
more like, I already have lots of parallel 22u 1206\1210 X5R ceramics and want to parallel them with say 3 470u polymers or so. as well as similar setup for input caps of the switchers...etc.
having parallel polymer caps of the cheaper one vs one panasonic polymer cap... which is better performance?
also, a compromise is to get 2 cheap polymers + one panasonic polymer... does this really have any better performance vs all 3 cheaper one?
I have some space so I am not bound to just one cap
the psu older design had 12v input from ac-dc power module and 3.3v @ 3 amps output + 5v @ 0.5a output + 12v output directly from power module.
the new one will be 5v power module instead of 12v, then same 3.3v output and 12v boost regulator. using 5v power module due to availability and price compared to previous choice.
thanks