5/29/2023 0 Comments Slayer exciter with mosfet![]() ![]() Since the input to the DS0026 is susceptible to the uncontrolled voltage transients from the feedback, I also added a few 1N4148 diodes to shunt voltages that go 0.6V above or below the supply rail. I also added a resonant tank capacitor across the primary to make use of the EMF flyback and help the circuit achieve resonance, and a 10K - 100K resistor across the input and output pins of the DS0026 to increase stability and reliability of the oscillation. (Most likely due to a impedance-matching issue with the gate acting like a capacitive load) To fix this, I simply used one of the very many DS0026 MOSFET driver inverted buffers I had in the parts bin. However, using FETs presented an issue with the gate-drive, as the gate could no longer be driven directly by the feedback. I used 2 IRFP250 MOSFETs in parallel to improve the current handling capability and thermal characteristics compared to the comparatively wimpy MJT3055. The biggest one that drove the rest of the design was switching out the normal BJT NPN transistor for a MOSFET. ![]() Compared to the normal Slayer exciter circuit, this circuit has some major changes.
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