5V 50KHz buck converter

318

04:16:24

Improvements?

published 7 years ago

torturo

7 years ago

Nice. But if I change the time from 0.5 to 1ms the plot will not work correct. Ore I do one mistake. Any idea?

eekee

7 years ago

@torturo: I think that's a limitation of the way it's simulated.

torturo

7 years ago

@eekee: That make sense. Ty eekee

hurz

7 years ago

Nice, only one note, IRL 555 wont discharge down to zero volt. This is a little bug within everycircuit 555 and can be worked around with a voltage source at PIN 7 with supply/3 voltage and a little less. To have still the same frequency the current mirror resistor must be doubled. Check this, hope you like it http://everycircuit.com/circuit/6345627020820480

Mayck

7 years ago

Yeah, its really nice, thank you! But i have one question left: will it works irl even without discharging down to zero, since the mosfet is closed when you turn the mosfet supply on?

hurz

7 years ago

You have to adapt the sawtooth voltage which is within 2/3 and minimum 1/3 of supply to fit the comparator threshold to not change the loop gain to much.

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