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Full Bridge rectifier using fast diodes

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hussamaldean:
Hi all,
I want to use fast diode for my flyback boost converter (DC-DC )which is using high frequency (~100KHz), the output is AC and I want convert it to DC using the rectifier, the RMS voltage is about 300V and the frequency is about 100KHz
which model of diodes shall I use ?
regards

hussamaldean:

--- Quote from: blueskull on January 29, 2019, 06:42:21 am ---Boost converter rectification with full bridge rectifier? Please tell me you are not on weed ;).

--- End quote ---
most schematics found are using single diode
but I want to use full bridge rectifier if possible
 

hussamaldean:

--- Quote from: blueskull on January 29, 2019, 07:09:29 am ---Can you show a schematic? I think we are talking about the same thing.

--- End quote ---
the schematic is attached
notice the diode which I want to replace it with full bridge rectifier

jbb:
Yep, that’s a flyback converter. The diode placement is very deliberate, and a full bridge is inappropriate.

Note that a flyback works by loading energy into the inductor core while the switch is on. Then when the switch is off the energy is transferred to the output via the diode.  So there’s no real reason to even want a full bridge rectifier.

hussamaldean:

--- Quote from: blueskull on January 29, 2019, 07:46:55 am ---That won't work. Your flyback converter's output is not symmetric, so half of your diodes won't conduct anyway.

--- End quote ---
ok
thx

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