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Mosaic

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Hi all:
I have an app that is popping paralleled TV 1.5KE33CA units.
I guess they are clamping at slightly different voltages and popping in sequence, one at a time.

As opposed to placing some .01 ohm current shunts to equalize loading, how about using some lower voltage units in series to share the load?
 
What about putting a polyfuse in series beforehand? It'll kick in and shut it all down until the problem goes away.

EDIT: Do you have an idea of what kind of overload conditions are happening? Duration? Levels?
 
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Ah ok, polyfuse wont kick in quick enough then.

Sounds to me like you need a suitable snubber? Is there no kickback diode either?
 
Got it working with a pair of 1.5KE36CA limited by 1 Ω resistors.
They run hot (92°C) without forced air cooling, but I'll add that.
They're each handling about 25A for 0.25%DC.
The kickback voltage has dropped to around 40V (from 55V) with less ringing, so the FET switch shouldn't avalanche.
 
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