High performance switching current regulator

Abstract

This paper presents results of comparison of dynamic characteristics of single- and double-loop current regulators. It is shown that the second control loop (average mode current control) increases impedance of a current regulator, improves phase margin and reduces settling time as compared with single-loop regulator. Experimental analysis of double-loop current regulator prototype based on full-bridge transformer-coupled converter showed well correspondence with p-spice simulation results.