I doubt the converters we purchase have low esr caps. Is there a big price difference between low and "normal" esr caps?
What's the typical load for your converter? ESR is only half the issue. The heat generated within a cap is:
P = esr * (Ripple Current)^2
You may have a 60A converter, but typically operate at 20A. That means the heat generated at 20A is about 9 times less than at 60A. Power dissipated increases with ripple current squared!
What's the difference in esr between those low esr caps and the normal ones? Perhaps 50%?
You're getting a lot more reliability (like 900%) when operating at 1/3 of max current than when switching to low esr caps.
