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Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Well, for a start, if you turn the power up too high, both FETs turn on at once and it explodes.
The diode drop plus the voltage drop across Rds(on) gets high enough that the "off" FET turns on slightly and starts to heat up. As it heats, its threshold voltage drops and it turns on harder, until it dies from overheating or VHF parasitic oscillations.
On top of that, it isn't even technically a flyback converter, it's a forward converter.
Registered Member #3637
Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
Steve Conner wrote ...
Well, for a start, if you turn the power up too high, both FETs turn on at once and it explodes.
The diode drop plus the voltage drop across Rds(on) gets high enough that the "off" FET turns on slightly and starts to heat up. As it heats, its threshold voltage drops and it turns on harder, until it dies from overheating or VHF parasitic oscillations.
On top of that, it isn't even technically a flyback converter, it's a forward converter.
I thought it was a resonant converter since....resonance? P:
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Flyback Driver
