I've got this high side P-Channel MOSFET driver circuit that Sgt. Wookie hooked me up with on another thread: http://forum.allaboutcircuits.com/showthread.php?t=52037
Tonight the 10uF, 25V cap I had on the breadboard for C2 exploded pretty good. Smoke, noise, even the cats ran out of the room .
The problem is I'm not sure why it went. The Panel V+ from the schematic was hooked to my bench supply which was set at 20V. The cap was rated for 25V. I put the cap there to quiet down some ringing (which was going up in the mid 30 volt range before the cap). However after the cap I never saw the voltage spike much at all.
So, do I just need to get a 50V cap for that C2? I was thinking of adding a 20 ohm resistor between panel V+ and the collector of Q1 to limit the current when the switching the gate on. When I had the ringing... where does the 35V come from? Is it like an boost converter just using the inductance that exists in the circuit?
Anyone have any experience with this kind of thing and how to spec C2?
Tonight the 10uF, 25V cap I had on the breadboard for C2 exploded pretty good. Smoke, noise, even the cats ran out of the room .
The problem is I'm not sure why it went. The Panel V+ from the schematic was hooked to my bench supply which was set at 20V. The cap was rated for 25V. I put the cap there to quiet down some ringing (which was going up in the mid 30 volt range before the cap). However after the cap I never saw the voltage spike much at all.
So, do I just need to get a 50V cap for that C2? I was thinking of adding a 20 ohm resistor between panel V+ and the collector of Q1 to limit the current when the switching the gate on. When I had the ringing... where does the 35V come from? Is it like an boost converter just using the inductance that exists in the circuit?
Anyone have any experience with this kind of thing and how to spec C2?
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