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Unless your goal is to try to learn how a DC/DC convert works I wouldn't build one from scratch. This problem has been solved many times and various vendors have dedicated DC/DC IC available.
Check the Linear Tech, Nation Semi, or TI website.
If you want to go ahead and build it yourself one...
I'm not able to see your picture due to some points limitation. I just signed up to this formum a few days ago.
A good way of finding out what is going on with a FET is to measure the Gate Source Voltage. On the highside this needs to be done by a differential measurement. I usually use a...
mosfet irf 440 driver matching+pdf
What kind of gate resistor are you using. The power consumption of the FETdriver depends to a large degree on how much current you drive the Gate with.
If you know what the gate charge of your FET is you can easily calculate the rise and fall time and see if...
Measuring the power factor is not quite as easy as it looks. It consist of two part:
Cos Phi (phase shift between current and voltage)
and the THD (total harmonic distortion, e.g. how much the current waveform differs from a perfect sine wave)
Unitrode (now part of Texas Instruments) makes a...
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