Current source gate drivers provide greatly improved power converter performance compared to standard voltage mode drivers, but they typically require 4 on-chip MOSFETs to control each power MOSFET, making the drivers more costly.
Researchers in the department of Electrical Engineering at Queen’s University in Kingston, Ontario, Canada have developed a low cost current source gate driver that provides excellent performance while requiring only 2 MOSFETs per power switch. This driver has been demonstrated to provide a 3% efficiency increase of to a peak of 88.7% compared to the same converter with a conventional voltage mode driver.
A detailed technology opportunity bulletin is available here: http://parteq.technologypublisher.com/files/sites/tob_low_cost_csd.pdf