kathmandu
Full Member level 5
Hello,
I wonder if I could use a simple diode clamping circuit instead of the classical RCD snubber for a flyback MOSFET switch. Both RCD and bare diode are dissipative circuits hence I don't mind using a higher current rated diode as long as the MOSFET drain voltage is clamped (for sure) at Vcc level. The RCD snubbers still allow some transient voltages across them and I want to avoid that (I want to use a lower voltage rated MOSFET).
Here are the classical (RCD snubbers) and the suggested (diode only) solutions:
Btw, the lower clamping diode is the MOSFET built-in (body) one. Thanks in advance for any oppinion.
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I forgot to mention: I'm talking about a low power (5W) 48VDC to 12VDC flyback converter.
I wonder if I could use a simple diode clamping circuit instead of the classical RCD snubber for a flyback MOSFET switch. Both RCD and bare diode are dissipative circuits hence I don't mind using a higher current rated diode as long as the MOSFET drain voltage is clamped (for sure) at Vcc level. The RCD snubbers still allow some transient voltages across them and I want to avoid that (I want to use a lower voltage rated MOSFET).
Here are the classical (RCD snubbers) and the suggested (diode only) solutions:
Btw, the lower clamping diode is the MOSFET built-in (body) one. Thanks in advance for any oppinion.
- - - Updated - - -
I forgot to mention: I'm talking about a low power (5W) 48VDC to 12VDC flyback converter.