heathyoung wrote:My guess - the inductor was saturated, (even though it is designed to run in continuous mode in a forward converter) and wasn't filtering the current pulses to the capacitor (that is its purpose) - the cap wasn't specc'ed to take that sort of ripple current, and committed suicide.
This is a good reason why you don't play with the settings too much on these without scoping them properly - you change the properties of the circuit, and your component values are wrong for the application. Turn the voltage up, bad things happen.
The maths behind these is a lot more complicated than most of us would like, trust me
I could post some up, but it may make your head do something similar to that cap
alsmith wrote:I would say crappy Quality Control and poor component selection (ie the cheapest) rather than crappy chargers. A lot of these problems seem to be at first switch on- that means they can't be tested by the manufacturer or they would see the problems. The same with the components they buy/use.
If/once the chargers are working they seem to be ok.
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