I have an objective to make a pulser for ultrasonic 1Mhz and 120V, for step up DC i used a boost converter with switching frequency 10KHz, 0.9 Duty Cycle and 12V supply, the boost converter work perfectly for static load like 1Mohm, but when i attach the converter for supplying my switching ultrasonic, the voltage from the converter was continuously decreased. below is the simulation and the circuit
the green line is the supply from converter right before the zener diode, and the red line is voltage in R3, note that it is 1 MHz switching so it seems just like a solid shape. the green voltage dropped down when the switching circuit does the work, after a while the voltage will be below zener diode and the diode cannot maintain the output voltage. so how to maintain the voltage for supplying the switching load circuit
- do i need to increase the converter frequency to 1Mhz, same as the switching load? but when i do this, the voltage is slightly less than 10KHz converter.
- i have tried to increase C1 but the voltage still drop down but just with less step, so will huge C1 solve the problem?
thank you so much for the help