Proceedings ArticleDOI
Digital charge balance controller with low gate count to improve the transient response of buck converters
E. Meyer,Zhiliang Zhang,Yan-Fei Liu +2 more
- pp 3320-3327
TLDR
In this paper, a linear/non-linear digital controller is presented which allows a Buck converter to recover from a load transient event with near-optimal voltage deviation and recovery time.Abstract:
A linear/non-linear digital controller is presented which allows a Buck converter to recover from a load transient event with near-optimal voltage deviation and recovery time. It is demonstrated that near-optimal transient performance can be obtained without information pertaining to the Buck converter's output inductor. The proposed controller can also be extended to applications which require load-line regulation. Unlike previous digital time-optimal controllers, the proposed controller does not require digital multiplier or divider blocks nor does it require two-dimensional look-up tables. Thus, the controller can be implemented with a significantly low gate count allowing for the use of low-cost FPGAs or CPLDs. Furthermore, the proposed controller provides an excellent transient response as it is capable of reacting asynchronously to a load transient event.read more
Citations
More filters
Journal ArticleDOI
Current-Limited Time-Optimal Response in Digitally Controlled DC–DC Converters
TL;DR: In this article, the authors address the problem of time-optimal load-transient response in digitally controlled dc-dc buck converters incorporating an inductor current limitation and derive the minimum number of switching actions required to handle a generic CL-TOC transient.
Journal ArticleDOI
DC–DC Converter With Digital Adaptive Slope Control in Auxiliary Phase for Optimal Transient Response and Improved Efficiency
Yue Wen,Olivier Trescases +1 more
TL;DR: In this paper, a digital adaptive slope control technique is presented to improve the dynamic response of a current-programmed mode (CPM) buck converter employing a low-cost auxiliary phase.
Journal ArticleDOI
Voltage-Based Charge Balance Controller Suitable for Both Digital and Analog Implementations
Liang Jia,Yan-Fei Liu +1 more
TL;DR: In this article, a voltage-based charge balance control algorithm is presented, which is suitable for both digital and analog implementations for buck converter to achieve near-optimal dynamic performance.
Proceedings ArticleDOI
Digital charge balance controller with an auxiliary circuit for superior unloading transient performance of Buck converters
TL;DR: In this article, a digital charge balance controller is presented which is capable of controlling a Buck converter and an auxiliary circuit to achieve an excellent unloading transient response, which is able to implement load-line regulation and yields a smooth transition from one loading condition to another.
Journal ArticleDOI
Digital Charge Balance Controller With an Auxiliary Circuit for Improved Unloading Transient Performance of Buck Converters
E. Meyer,Yan-Fei Liu +1 more
TL;DR: In this paper, a digital charge balance controller is presented which is capable of controlling a buck converter and an auxiliary circuit to achieve an excellent unloading transient response, while the auxiliary circuit significantly reduces the voltage overshoot caused by an unloading transmisson.
References
More filters
Journal ArticleDOI
A New Digital Control Algorithm to Achieve Optimal Dynamic Performance in DC-to-DC Converters
Guang Feng,E. Meyer,Yan-Fei Liu +2 more
TL;DR: In this article, a new control algorithm is proposed to achieve optimal dynamic performance for dc-to-dc converters under a load current change and for a given set of circuit parameters, such as the output inductor, output capacitor, switching frequency, input voltage, and output voltage.
Journal ArticleDOI
Proximate Time-Optimal Digital Control for Synchronous Buck DC–DC Converters
Vahid Yousefzadeh,Amir Babazadeh,B. Ramachandran,Eduard Alarcon,Lucy Y. Pao,Dragan Maksimovic +5 more
TL;DR: In this paper, the authors proposed a proximate time-optimal digital (PTOD) controller, which is a combination of a constant-frequency PWM controller employing a linear PID compensator close to a reference point, and a linear or nonlinear switching surface controller (SSC) away from the reference, together with smooth transitions between the two.
Journal ArticleDOI
Continuous-Time Digital Controller for High-Frequency DC-DC Converters
Zhenyu Zhao,Aleksandar Prodic +1 more
TL;DR: In this paper, a voltage mode digital controller for low-power high-frequency DC-DC switch-mode power supplies (SMPS) is proposed, which has fast transient response, approaching physical limitations of a given power stage.
Journal ArticleDOI
An Optimal Control Method for Buck ConvertersUsing a Practical Capacitor ChargeBalance Technique
TL;DR: In this article, a novel control method is presented which utilizes the concept of capacitor charge balance to achieve optimal dynamic response for buck converters undergoing a rapid load change, which is implemented with analog components and is cheaper and more effective than its digital counterparts.
Journal ArticleDOI
Derivation of a second-order switching surface in the boundary control of buck converters
TL;DR: In this paper, a second-order switching surface was proposed for boundary control of buck converters, which can make the overall converter exhibit better steady-state and transient behaviors than the one with a first-order switch surface.