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2 switch flyback
Hi Madcow, i agree with you that -200v is reflected back to the primary. However, if diodes D1 and D2 of 2nd page, fig 5 of following http://www.edn.com/contents/images/47173.pdf ...were on during the off-time of the Mosfet switch's then this would not be possible -since it would be 400V...- wurring
- Post #7
- Forum: Circuit design
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2 switch flyback
If for example as a 2 switch flyback….. Np = 100 Ns = 10 Vin = 400V Vout = 20V ………………………………………….. When mosfets go off….. Secondary starts conducting. Vs / Ns = d(phi) / dt (1) At the same time the primary is conducting through the diodes. Vp / Np = d(phi) / dt...- wurring
- Post #5
- Forum: Circuit design
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2 switch flyback
I thankyou for this reply, and i am still concerned since as you rightly point out, there is a reflected voltage on the primary from the secondary which happens when the switch is off. The thing is, the primary can only have one voltage across it at any one time......not two different ones at...- wurring
- Post #3
- Forum: Circuit design
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2 switch flyback
Hello, I am requesting your assistance if i may as i must make a DCDC converter to have V(in) = 400 Volts and V(out) = 12 Volts. The high V(in) makes me want to use a 2 switch flyback, as in the following article...... http://www.edn.com/contents/images/47173.pdf ...the two switches, and...- wurring
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- Replies: 8
- Forum: Circuit design
