MilkMan2004 Posted October 14, 2023 Report Share Posted October 14, 2023 (edited) Time to do some capacitor replacments and have a question about ripple current.. The way I understand it generally higher ripple current capacity is better as caps will last longer.. But on digikey ripple current has 2 measurments.. Low frequency @120hz High frequency @ 100khz I am assuming these different specs would be for different use cases like basic power delivery vs power smoothing? Is that correct? I am switching to polymer caps so esr is low. Should I be focusing more on the 100khz ripple rating? Edited October 14, 2023 by MilkMan2004 Quote Link to comment Share on other sites More sharing options...
UltimateMe Posted October 14, 2023 Report Share Posted October 14, 2023 Well, about ripple currency there is enough information to find on the internet, so I'm not gone give a full course here But the answer is NO on "The way I understand it generally higher ripple current is better as caps will last longer.. ". A bit higher is not a problem, but you don`t want it to high. And you certainly want it too low. Too low: - overheating of the caps - reduced performance - unreliable working Too high: - overload - less efficient Which caps do you want to replace? I can give you some advice on which you could order. Quote Link to comment Share on other sites More sharing options...
MilkMan2004 Posted October 14, 2023 Author Report Share Posted October 14, 2023 49 minutes ago, UltimateMe said: Well, about ripple currency there is enough information to find on the internet, so I'm not gone give a full course here But the answer is NO on "The way I understand it generally higher ripple current is better as caps will last longer.. ". A bit higher is not a problem, but you don`t want it to high. And you certainly want it too low. Too low: - overheating of the caps - reduced performance - unreliable working Too high: - overload - less efficient Which caps do you want to replace? I can give you some advice on which you could order. Thanks for the info much appreciated.. I wasted too much time blowing up caps and screwing around in electronics class instead of paying attention... if we could only go back in time and do things over lol I was looking at these for the 1500uf https://www.digikey.ca/en/products/detail/kemet/A759MS158M1AAAE012/13420083 Quote Link to comment Share on other sites More sharing options...
UltimateMe Posted October 14, 2023 Report Share Posted October 14, 2023 The 1500uF caps in the OG Xbox are 1820 mA on 100kHz, so the one you selected is way, way too high with its 7.785A @ 100kHz. A quick check told me that they have no lower ripple current for those poly caps. Electrolytic this are good replacements: https://www.digikey.ca/en/products/detail/nichicon/UHD0J152MPD/2598038 1 Quote Link to comment Share on other sites More sharing options...
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