High Bandwidth Inductor Current Estimator for Digitally Controlled DC-DC Converters for Light Load Applications

被引：8

作者：

Kurnar, Hitesh ^{[1
]}

Channappanavar, Rajat ^{[2
]}

Mishra, Santanu K. ^{[1
]}

机构：

[1] IIT Kanpur, Dept Elect Engn, Kanpur 208016, Uttar Pradesh, India

[2] Maxlinear Technol Pvt Ltd, Bengaluru 560103, India

来源：

IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS | 2021年 / 9卷 / 06期

关键词：

Switches; Inductors; Estimation; Pulse width modulation; Voltage control; Control systems; Buck converters; Current estimation; digital control; high-frequency converters; POWER-FACTOR CORRECTION; CURRENT SENSOR; MODULATOR;

D O I：

10.1109/JESTPE.2021.3105598

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This article presents a digital current estimator designed for switching converters operating under light load conditions. The proposed technique can estimate the inductor current for continuous and discontinuous conduction modes of operation with independent gain control for average and ripple components. The impact of inductor parameter tolerance, MOSFET ON-state resistance, and diode forward voltage drop on the estimation are analyzed. The theory of estimation and its implementation on field programmable gate array is detailed. The proposed theory is validated experimentally on a buck converter prototype with an accuracy of 5% on average and 1% on the ripple component. The applicability of the estimation method is verified on a digital current hysteresis-controlled buck converter and unity power factor boost rectifier.

引用

页码：6681 / 6691

页数：11

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