UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Ed_Dinning · 3rd Dec 2018, 10:44 pm

Hi Andy, have a good dig on the manufacturers website. They normally publish tables of ripple current , ESR, lifespan and temp rating for each of their cap ranges.
We used this a lot in SMPS design.
Note that the same cap in different aspect ratios can have different max current and temp ratings.

I have some of the charts here but they are for older caps, no longer current.
Reduction of cap temp by 10C will double lifespan. Figures quoted on these charts are often for 50 or 100KHZ ripple. 50/100Hz is normally much more benign.

Ed

3rd Dec 2018, 10:44 pm	#5
Ed_Dinning Dekatron Join Date: Jan 2004 Location: Newcastle upon Tyne, Tyne & Wear, UK. Posts: 8,194	Re: Reservoir capacitors and ripple current. Hi Andy, have a good dig on the manufacturers website. They normally publish tables of ripple current , ESR, lifespan and temp rating for each of their cap ranges. We used this a lot in SMPS design. Note that the same cap in different aspect ratios can have different max current and temp ratings. I have some of the charts here but they are for older caps, no longer current. Reduction of cap temp by 10C will double lifespan. Figures quoted on these charts are often for 50 or 100KHZ ripple. 50/100Hz is normally much more benign. Ed