200mA at 450V is 90W or 7.5A from the 12V supply.No, I forget to mention... It would be 12V to 400/450V...
Current is less than 200mA what comes out from 555
You should be able to cas_c_ode the 555 output with a high voltage power MOSFET, that is you connect the gate to Vcc and the source to the 555 output pin. The current rating will be the same as that for the 555, the bipolar can handle about 200mA - the CMOS type is much lower.Hello everyone,
Does anyone know any simple circuit to amplify output voltage of 555 timer to be close enough to 450V, current is not matter.
I need about 450V at output at specific frequency...
I need stable and fixed 400-450V.
He might need to use a driver on the 555 output for that FET as at that frequency I don't think the 555 can supply the current to fully switch it that quickly.You should be able to cas_c_ode the 555 output with a high voltage power MOSFET, that is you connect the gate to Vcc and the source to the 555 output pin. The current rating will be the same as that for the 555, the bipolar can handle about 200mA - the CMOS type is much lower.
The MOSFET will need a Vgs of about 6 - 8V to turn it fully on and avoid excessive dissipation - the maximum Vcc rating for the bipolar 555 is safe for the Vgs of almost any power MOSFET.
The output current rating is the output current rating - the bipolar can switch upto 200kHz, granted the pulses get a bit rounded, but its a lot more than the TS mentioned. The CMOS 555 is (allegedly) good for 2MHz - but at a lot less output current.He might need to use a driver on the 555 output for that FET as at that frequency I don't think the 555 can supply the current to fully switch it that quickly.
The bipolar 555 can only switch 200mA within the Vcc constraints and multiplying the secondary voltage on a transformer will multiply the primary current by the same factor - so getting 450V a 200mA via a transformer is very much a non-starter.Drivers for a 555 are no problem.
Just to verify, you want 200ma at 450V at 30Khz?
That is a large current at that voltage, it needs verifying.
Making a transformer from scratch is really no big deal, but you have to know your specs first.
I see the 200ma at 450VAC P-P as an assumption by other people, so you do need to verify this.
RMS and P-P for a square wave pretty close, RMS is 1/2 the P-P value.