A novel zero-voltage-detector for buck converter in discontinuous conduction mode (DCM)

A novel zero-voltage-detector for buck converter in discontinuous conduction mode (DCM)

This paper presents a Zero-Voltage-Detector (ZVD) circuit for buck converters working in discontinuous conduction mode (DCM). A novel comparator with pre-amplification property is proposed to provide fast sensing and comparison to optimize the switching timing of power transistors, hence minimizing...

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Bibliographic Details
Main Authors: Jia, Meng, Sun, Zhuochao, Siek, Liter
Other Authors: School of Electrical and Electronic Engineering
Format: Conference or Workshop Item
Language:English
Published: 2021
Subjects:
Engineering::Electrical and electronic engineering::Integrated circuits
Buck Converter
Discontinuous Conduction Mode (DCM)
Online Access:https://hdl.handle.net/10356/152111
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Institution: Nanyang Technological University
Language: English
Description
Summary:This paper presents a Zero-Voltage-Detector (ZVD) circuit for buck converters working in discontinuous conduction mode (DCM). A novel comparator with pre-amplification property is proposed to provide fast sensing and comparison to optimize the switching timing of power transistors, hence minimizing the power losses caused by the reverse inductor current. The proposed DCM buck converter is fabricated using 0.18um CMOS technology with a chip area of 0.9mm 2 . The simulated sensing delay of the proposed ZVD is only about 6ns. It achieves > 85% power efficiency for load currents of > 10mA when the input and output voltages are 3.3V and 2.4V respectively.

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