Fundamentals of current source driver
Resonant gate drivers were originally developed to recover part of MOSFET gatedrive loss when operating at high switching frequency. Most of investigations are generally emphasizing gate energy savings by the resonant driver and concentrating on the drive topologies, but ignore the potential switching loss savings that are much more dominant in MHz switching power converter. The idea of the CSDs is to build strong gate-drive current during the switching transition to realize quick turn-on and turn-off transition and reduce high-frequency switching loss and gate-drive loss in power MOSFETs. The switching loss characteristics and behavior in a high-frequency synchronous buck VR is investigated and the parasitic inductances act as a current snubber at turn on to reduce turn-on loss, but prolong the turn-off time and increase turn-off loss.
Fundamentals of current source driver, Page 1 of 2
< Previous page Next page > /docserver/preview/fulltext/books/cs/pbcs033e/PBCS033E_ch2-1.gif /docserver/preview/fulltext/books/cs/pbcs033e/PBCS033E_ch2-2.gif