I was fixing up a friends Dell tower and the crummy CapXon output caps in the PSU were bad. These were 2200uf/6.3V jobs. My experience, having fixed a huge amount of test equipment over the decades, is that electrolytic caps with less than a 15V or so rating are invariably the first to fail. I can't imagine designing 6.3V caps into anything!
Not having a suitable replacement on hand, and knowing that low ESR is really the primary consideration in a switching supply, not value, and suspecting that the CapXon part has no special abilities in that area, I installed a couple 150uF OSCONs. These have ultra low ESR and huge ripple current capabilities. So far the PSU is working like a champ.
Still, I wish the value were higher, though design-wise I'm not sure that anything justifies it. Just curious, what do other think about what I did? Also, does anybody have actual specifications on the CapXon junk?
Best,
Conrad
Not having a suitable replacement on hand, and knowing that low ESR is really the primary consideration in a switching supply, not value, and suspecting that the CapXon part has no special abilities in that area, I installed a couple 150uF OSCONs. These have ultra low ESR and huge ripple current capabilities. So far the PSU is working like a champ.
Still, I wish the value were higher, though design-wise I'm not sure that anything justifies it. Just curious, what do other think about what I did? Also, does anybody have actual specifications on the CapXon junk?
Best,
Conrad
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