Skip to Main content Skip to Navigation
Conference papers

A digital direct controller for buck converter

Abstract : A novel integrated digital controller for buck converter based on the direct system-variable calculation is presented. Compared with linear compensators, the discrete-time direct controller is conceived to generate an additional control variable during each switching period that increases the convergence rate when system states change. An all-digital current estimator is adopted to eliminate the use of current sensor. Experimental results verify closed-loop operation at switching frequency up to 4MHz. The dynamic response time for a load current step-up from 0.3A to 0.45A is 23.8μs, and 21.4μs for a step-down from 0.45A to 0.3A. An efficiency of over 75% is maintained over a power range from 29.3mW to 1.12W in which the maximum efficiency of 93.2% is achieved at 1.88V output.
Complete list of metadata
Contributor : Xuefang Lin-Shi <>
Submitted on : Thursday, January 17, 2019 - 5:13:48 PM
Last modification on : Tuesday, January 5, 2021 - 12:32:03 PM



Bo Li, Jinshun Bi, Zhengsheng Han, Jiajun Luo, Xuefang Lin-Shi, et al.. A digital direct controller for buck converter. ICSICT, Oct 2014, Guilin City, Guangxi Province, China. ⟨10.1109/ICSICT.2014.7021468⟩. ⟨hal-01985228⟩



Record views