Patent ID: 6452814
Filing Date: 2002-09-17
Classification: H02M,H03K,Y02B

Abstract:
A universally applicable zero voltage transition switching cell having a first terminal and a second terminal comprisingfirst switch means having a first terminal and a second terminal with said first terminal of said first switch means connected to said first terminal of said switching cell, an inductor having a first terminal and a second terminal with said first terminal of said inductor connected to said second terminal of said first switch means and with said second terminal of said inductor connected to said second terminal of said switching cell, a switch capacitor series network having a first terminal and a second terminal with said first terminal of said switch capacitor series network connected to said first terminal of said inductor and with said second terminal of said switch capacitor series network connected to said first terminal of said first switch means comprising, a capacitor, second switch means placed in series with said capacitor operable substantially in anti-synchronization to said first switch means, whereby said inductor provides energy to drive a zero voltage turn on transition for said first switch means when placed in a pulse width modulated power converter in which said switching cell is employed in place of the main switch of said pulse width modulated power converter and both the current through said switching cell and the source current of said pulse width modulated power converter are continuous.