Hey folks I have quite a few questions about Mosfet transistor design. I've put all in one schematic, frankenstein style.
The Mosfet maximum voltage Vgs is +20V/-10V. Recommended Vgs is +15V/-5V.
Diodes D1 and D2 should protect the Mosfet from higher than the recommended, still lower than the maximum ratings. (Is this okay)?
R1 should help to reduce "ringing" effect, Since the gate driver is split (High output / Low output) there's no reverse diode connected in parallel with R1.
(Is this okay)?
Since I want to drive with positive and negative voltage, +15V and -5V are used to power the gate driver IC (UCC27532)
R2 is placed for faster discharge, reducing "Miller" effect (Is this okay)?
R3 + R4 - I don't know what they are for. I've seen this in one design (HV flyback Auxiliary power supply - CREE power device reference design).
Maybe is for filtering (Is this okay)?
C1, C2, C3 - not sure if they do a good job.. or not needed (Is this okay)?
D3, D4 - protection diodes (flyback). Not sure if I need the both, just D3 or D4. Is the polarity correct? What type and what voltage they should be - right now there are 900V (same rating as the mosfet - schottky diode) (Is this okay)?
I would appreciate your criticism and comments.
The Mosfet maximum voltage Vgs is +20V/-10V. Recommended Vgs is +15V/-5V.
Diodes D1 and D2 should protect the Mosfet from higher than the recommended, still lower than the maximum ratings. (Is this okay)?
R1 should help to reduce "ringing" effect, Since the gate driver is split (High output / Low output) there's no reverse diode connected in parallel with R1.
(Is this okay)?
Since I want to drive with positive and negative voltage, +15V and -5V are used to power the gate driver IC (UCC27532)
R2 is placed for faster discharge, reducing "Miller" effect (Is this okay)?
R3 + R4 - I don't know what they are for. I've seen this in one design (HV flyback Auxiliary power supply - CREE power device reference design).
Maybe is for filtering (Is this okay)?
C1, C2, C3 - not sure if they do a good job.. or not needed (Is this okay)?
D3, D4 - protection diodes (flyback). Not sure if I need the both, just D3 or D4. Is the polarity correct? What type and what voltage they should be - right now there are 900V (same rating as the mosfet - schottky diode) (Is this okay)?
I would appreciate your criticism and comments.
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