07-13-2012, 06:41 PM
When bought from major mfrs, who are many today, I hadn't seen many problems with todays parts. Nichichojn, Rubycon, Chemion, Panasonic, Tayo Yuden, TDK, All work fine.
I design conservatively.
My switcher for optical modem battery backup, that works in India and so had to be tested up to 270V AC, and at 50C ambient at full rated power, passed the tests just fine, and ha been manufactured in qtys of few hunderds of thousands. But I did choose high ripple low ESR switching grades for input and output etc., and with good room to expand.
I design conservatively.
My switcher for optical modem battery backup, that works in India and so had to be tested up to 270V AC, and at 50C ambient at full rated power, passed the tests just fine, and ha been manufactured in qtys of few hunderds of thousands. But I did choose high ripple low ESR switching grades for input and output etc., and with good room to expand.
