Forcing the limits — Peak voltage extension for floating buck controller

Abstract

A solution for increasing a current mode floating buck controller's versatility, through the use of a peak voltage extension block, is investigated, implemented and its performances are measured. Most current controller architectures have limitations that impose harsh application-constraints. This paper proposes a new method of reducing those limitations by allowing precise, linear, external control of the peak voltage threshold. The solution is especially useful in applications where each instance of the buck controller needs to be individually adjusted to meet specifications.