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what is the part number of the transistor? the calculation is not straightforward, and depends on the air flow, emmisivity etc.
the delta junction to ambient will give you a fair idea, (power X junction to ambient)
Re: high side mosfet driving
Yes use a driver transformer for the high side and use a totempole on the low side driver, by the way what is your switching frequency?
trapezoidal transformer core
Theoratically you can make a transformerless power supply, you will have to design high power charge pump voltage doublers/multipliers, then have a sineweighted full bridge to get the sine.
but the efficiancy you get may be less than 10-15% and will not be...
Re: QC and CAM of PCB
it depends on the type of design, depending on the design the following need to be taken into account
1: Clearence of tracks depending on the voltage differance between them
2: the width of the track depending on current
3: if it is a HF design then every thing need to be...
use LM2576 and make a buck regulator, using a potential devider is out of question, the power disipation will be very large, a linear regulator also will diissipate lot of power( 28-12 x 2 amp)
i think your DC-Dc has become unstable, increase phase margin. maintain minimum 50 phase margin.
improper layout also will be responsible for this. use single point grounding. and see that the controller is not near the ETD core and that the IC ground is returned at the output cap negetive at a...
i dont think the L and C at the input of the transformer is required, the hi-frequency component will be filtered by the primary inductance of the main transformer itself, maybe only a small capacitor will be required at the output.
by the way is it a closed loop system?
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