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Yea...
about feedbacks, I saw few circuits online with outputs sharing the same ground with general ground, perhaps, because the output voltages ar not lethal, like an SMPS I saw with dual 35VDC output, the feedback from this output wasn't isolated.
Thanks a lot Guyz.... u guyz rock!. Sorry 4 my long absence, am coming work with school so time is more of a serious issue. Av made the circuit using SG3525 oscillating at 80khz, all seemed but i tried quite a couple of ir2110, 2112....all failed, couldn't get a genuine part. I resorted to "Old...
Thank you bery kindly my friend.... Now it's starting to make sense to me. lemme start doing some home work. I will keep checkin for further inputs. Any contribution is appreciated, No knowledge is a waste.
Sorry about the way i sound...... I don't know much about gate charge and drive current relationship. If there is a formular for it, it might b useful to me. I just don't want to jump into what i don't know.
Thanks for your quick response but you are like going in circles. How do i detetmine the required current for the FET cos all i see from the datasheet is gata charge.
What i don't know is how to calculate to get the gate current that can efficiently switch the FET's at hundreds of kilohertz.
Something like a formular that can compute some parameters and give the current required.
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This is my first SMPS unit..... Current Economic state...
Yea, about that.... forgive my ignorance cos i don't know much.
please, can you detail me on the frequency, current and gate charge relationship. Thanks alot.
Hello Guys..... Been a very long time.
I wish to design a 12VDC-310VDC SMPS unit. I picked SG3525 to provide 150khz PWM on each leg of IRFB3207. My question is, Can the FET go as high as 150khz?. My transformer is ETD44, from the datasheet, it gives approx. 500W at 100khz. My guess is that at...
time 4 some upgrade, Hello friends, I would
like 2 tweach my bridge inverter to pure sine
wave, I waz thinking, from my sg3524n ic,
send the signals to a second order LPF I
made with lm324, then send d signal. to a
pulse transformer Wired in bridge before
switching d power FETs. I will switch...
hello kabeer, Thanks alot. The circuit is working after some little remod. Without connecting the bootstrap cap and FET I have about 5.8v . My little question is; if I connect it as it should, do u think it will fully switch ON my irf3205 FET because am running it from a 12V? I don't want my FET...
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