Hybrid Digital Adaptive Control for Fast Transient Response in Synchronous Buck DC–DC Converters

Autor:	Dragan Maksimovic, Amir Babazadeh
Rok vydání:	2009
Předmět:	Engineering Adaptive control Control theory business.industry Buck converter Electronic engineering Digital control Transient (oscillation) Transient response Electrical and Electronic Engineering Converters business Pulse-width modulation
Zdroj:	IEEE Transactions on Power Electronics. 24:2625-2638
ISSN:	1941-0107 0885-8993
DOI:	10.1109/tpel.2009.2033065
Popis:	This paper presents a hybrid digital adaptive (HDA) control for fast step-load transient responses in synchronous buck DC-DC converters. The proposed HDA controller results in near-time-optimal step-load transient responses even when the output voltage is sampled using a relatively low-resolution, narrow-range window A/D converter. The controller is a combination of a standard constant-frequency pulsewidth-modulated (PWM) control in the vicinity of steady-state operating point and a bank of switching surface controllers (SSCs) away from the reference. The switching surface slope is adaptively selected by a supervisor based on an inductor current estimate. Furthermore, the controller is capable of taking into account a maximum inductor current limitation. A large-signal stability analysis is presented for all possible cases during transients when one of the SSCs is active. Experimental results demonstrate fast transient responses for a 1.3 V, 10 A synchronous buck converter over a wide range of step-load transients.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9944f7d9be66f7e09682c2a16cc24dab https://doi.org/10.1109/tpel.2009.2033065 Zobrazit plný text záznamu