Journal ArticleDOI
A High Efficiency Dual-Mode Buck Converter IC For Portable Applications
Wan-Rone Liou,Tsung-Hsing Chen,Yuen-Lung Kuo,Tang-Yu Huang,Mei-Ling Yen +4 more
- Vol. 23, Iss: 2, pp 667-677
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TLDR
In this article, a dual-mode dc to dc step-down switching regulator/converter with high conversion efficiency has been proposed for single-cell lithium-ion battery supply applications.Abstract:
This paper presents the design of a novel wide output current range dual-mode dc to dc step-down (Buck) switching regulator/converter. The converter can adaptively switch between pulsewidth modulation (PWM) and pulse-frequency modulation (PFM) both with very high conversion efficiency. Under light load condition the converter enters PFM mode. The function of closing internal idle circuits is implemented to save unnecessary switching losses. The converter can be switched to PWM mode when the load current is greater than 100 mA. Soft start operation is designed to eliminate the excess large current at the start up of the regulator. The chip has been fabricated with a TSMC 2P4M 0.35 mum polycide CMOS process. The range of the operation voltage is from 2.7 to 5 V, which is suitable for single-cell lithium-ion battery supply applications. The maximum conversion efficiency is 95% at 50 mA load current. Above 85 % conversion efficiency can be reached for load current from 3 to 460 mA.read more
Citations
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Journal ArticleDOI
Control Design for Optimizing Efficiency in Inductive Power Transfer Systems
TL;DR: In this article, a decoupled control technique is developed for an IPT converter with front-side and load-side dc/dc converters, where the load side converter is solely responsible for output regulation, while the frontside converter is responsible for impedance-matching of the IPT converters by controlling its input-to-output voltage ratio.
Journal ArticleDOI
Hybrid Buck–Boost Feedforward and Reduced Average Inductor Current Techniques in Fast Line Transient and High-Efficiency Buck–Boost Converter
TL;DR: In this article, a buck-boost converter with high efficiency and small output ripple is proposed to extend the battery life of portable devices, and the hybrid buck-Boost feedforward (HBBFF) technique is integrated in this converter to achieve fast line response.
Journal ArticleDOI
Survey of DC-DC Non-Isolated Topologies for Unidirectional Power Flow in Fuel Cell Vehicles
Mahajan Sagar Bhaskar,Vigna K. Ramachandaramurthy,Sanjeevikumar Padmanaban,Frede Blaabjerg,Dan M. Ionel,Massimo Mitolo,Dhafer Almakhles +6 more
TL;DR: The state-of-the-art in unidirectional non-isolated DC-DC Multistage Power Converter (MPC) topologies for FC-VPT application is described and the suitability for different vehicular applications is stated.
Journal ArticleDOI
Quadratic Differential and Integration Technique in $V^{2}$ Control Buck Converter With Small ESR Capacitor
TL;DR: In this article, a quadratic differential and integration (QDI) technique was proposed for the design of V 2 control buck converters with small equivalent series resistance (ESR) of the output capacitor.
Journal ArticleDOI
A Noise-Shaped Buck DC–DC Converter With Improved Light-Load Efficiency and Fast Transient Response
Wei Yan,Wenhong Li,Ran Liu +2 more
TL;DR: In this paper, a noise-shaped synchronous buck dc-dc converter based on a third-order active-passive continuous-time sigma-delta modulator is presented.
References
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TL;DR: The analysis and design techniques of CMOS integrated circuits that practicing engineers need to master to succeed can be found in this article, where the authors describe the thought process behind each circuit topology, but also consider the rationale behind each modification.
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TL;DR: In this paper, the authors present an overview of current mirror and Opamp design and compensation for single-stage Amplifiers and Current Mirrors, as well as a comparison of the two types of Opamps.
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Switching Power Supply Design
TL;DR: In this paper, the authors present a complete instruction in one volume to design a switching power supply circuit using a tutorial, how-to approach, using higher switching frequencies, new topologies, and integrated PWM chips.
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TL;DR: In this article, the authors present a detailed discussion of the application of Bipolar Transistors in a CMOS process and their application in a variety of applications, including the following: 1. Semiconductors.
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