![]() Full bridge is a bit more complicated and not so easy for the inexperienced. Half bridge is not really suited for such high power and full bridge is more suited. One other thing is that you have to have a strong signal arriving at the gates of the mosfets and a current amplifier has to be added with your driver Regarding your switching devices well I guess you will be better off using parallel switchers on the half bridge say 2 X irfp460 for high side and 2 more in parallel for the low side. On the output on the other hand you will need around 5 to 6000uF on each rail assuming an output voltage of 100v -0-100v. Your input capacitance have to be strong and you will need around 2 to 3000uf X 400v across the 320v rail. I guess at 50% duty cycle you may get away with it and also some added cooling will be necessary. ![]() What exactly are your intentions for this power supply? is it for audio purpose? I guess you can peak 2000 watts with an EE55 core but it will be a question of the duty cycle needed. There are also other smps you can build from this site. There is also the pdf file available in post #13. I suggest you take a look at the tread and take some ideas. You can take a look at my smps which is published here called a Audio smps 700w (IR2153). Switching losses also play their part in high frequencies. I suggest you stay under 100Khz as more care is needed in the layout and stray coupling and inductance try to get in the way. As far as distortion usually the frequencies used in smps are far higher than the audio frequencies and are not usually heard, however good EMI filtering and shielding is needed. Unregulated is suitable for audio purposes. If its your first time building a SMPS then I suggest you start with a simple one with no feedback. Efficiency tends to be better with full bridge as less current is needed for the same power due to the primary voltage is double. ![]() Having full bridge needs more winding on the trafo and the circuit will be more complicated and more care is needed. ![]() Regarding efficiency I got 90% or better in my prototypes.įull bridge is usually used for more power above 1000 watts. The duty cycle is more or less 60% for audio to get to the power needed. I think if you use half bridge is well suited to the power level you want for audio purpose. In theory half bridge is suitable up to 500w but I got 1200 out of a half bridge smps. ![]()
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January 2023
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