80V synchronous 4-switch buck-boost controller delivers hundreds of watts with 99% efficiency
Keith Szolusha and Tage Bjorklund
Abstract
The LT8705, an 80V synchronous 4-switch buck-boost controller, that can provide hundreds of watts at up to 99% efficiency with a single inductor, is described.
Keywords
Buck-boost controller
LT8705
Introduction
A DC/DC converter’s efficiency and component temperature are important considerations in high power applications where high current could overheat the catch diode used in an asynchronous buck or boost topology. Replacing the catch diode with a synchronous switch can significantly improve overall converter efficiency and eliminate much of the heat that would be otherwise generated ...
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