High-Efficiency CMOS Buck Converter with Wide Output Voltage Range

2016 ◽  
Author(s):  
Natasa Mitrovic ◽  
Reinhard Enne ◽  
Horst Zimmermann
Keyword(s):  
Output Voltage ◽  
High Efficiency ◽  
Buck Converter ◽  
Voltage Range

scholarly journals High Efficiency Buck-Boost Converter with Three Modes Selection for HV Applications using 0.18 μm Technology

2020 ◽  
Vol 18 (2) ◽  
pp. 137-144
Author(s):  
Fouad Farah ◽  
Mustapha El Alaoui ◽  
Abdelali El Boutahiri ◽  
Mounir Ouremchi ◽  
Karim El Khadiri ◽  
...  
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Output Voltage ◽  
High Efficiency ◽  
Power Conversion ◽  
Boost Converter ◽  
Current Control ◽  
Voltage Range ◽  
Operating Modes ◽  
Soft Start

In this paper, we aim to make a detailed study on the evaluation and the characteristics of the non-inverting buck–boost converter. In order to improve the behaviour of the buck-boost converter for the three operating modes, we propose an architecture based on peak current-control. Using a three modes selection circuit and a soft start circuit, this converter is able to expand the power conversion efficiency and reduce inrush current at the feedback loop. The proposed converter is designed to operate with a variable output voltage. In addition, we use LDMOS transistors with low on-resistance, which are adequate for HV applications. The obtained results show that the proposed buck-boost converter perform perfectly compared to others architecture and it is successfully implemented using 0.18 μm CMOS TSMC technology, with an output voltage regulated to 12V and input voltage range of 4-20 V. The power conversion efficiency for the three operating modes buck, boost and buck-boost are 97.6%, 96.3% and 95.5% respectively at load current of 4A.

scholarly journals A Low EMI DC-DC Buck Converter with a Triangular Spread-Spectrum Mechanism

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 856
Author(s):  
Jing-Yuan Lin ◽  
Yi-Chieh Hsu ◽  
Yo-Da Lin
Keyword(s):  
Spread Spectrum ◽  
Electromagnetic Interference ◽  
Output Voltage ◽  
Buck Converter ◽  
Circuit Board ◽  
System Stability ◽  
Maximum Efficiency ◽  
Load Current ◽  
Voltage Range ◽  
Switching Regulators

In this paper, a triangular spread-spectrum mechanism is proposed to suppress the electromagnetic interference (EMI) of a DC-DC buck converter. The proposed triangular spread-spectrum mechanism, which is implemented in the chip, can avoid modifying the printed circuit board of switching regulators. In addition, a lower ripple of output voltage of switching regulators and a better system stability can be realized by the inductive DC resistance (DCR) current sensing circuit. The chip is fabricated by using TSMC 0.18-μm 1P6M CMOS technology. The chip area including PADs is 1.2 × 1.15 mm2. The input voltage range is 2.7~3.3 V and the output voltage is 1.8 V. The maximum load current is 700 mA. The off-chip inductor and capacitor are 3.3 μH and 10 μF, respectively. The experimental results demonstrate that the maximum spur of the proposed DC-DC buck converter with the triangular spread-spectrum mechanism improves to 14dBm. Moreover, the transient recovery time of step-up and step-down loads are both 5 μs. The measured maximum efficiency is 94% when the load current is 200 mA.

A Time-Domain-Controlled Current-Mode Buck Converter With Wide Output Voltage Range

2019 ◽  
Vol 54 (3) ◽  
pp. 865-873 ◽  
Author(s):  
Jin-Gyu Kang ◽  
Jeongpyo Park ◽  
Min-Gyu Jeong ◽  
Changsik Yoo
Keyword(s):  
Time Domain ◽  
Output Voltage ◽  
Current Mode ◽  
Buck Converter ◽  
Voltage Range

A voltage-mode DC—DC buck converter with fast output voltage-tracking speed and wide output voltage range

2014 ◽  
Vol 35 (5) ◽  
pp. 055005 ◽  
Author(s):  
Miao Yang ◽  
Baixue Zhang ◽  
Yun Cao ◽  
Fengfeng Sun ◽  
Weifeng Sun
Keyword(s):  
Output Voltage ◽  
Buck Converter ◽  
Voltage Range ◽  
Voltage Mode

scholarly journals High-efficiency Bidirectional Buck–Boost Converter for Residential Energy Storage System

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3786 ◽  
Author(s):  
Seok-Hyeong Ham ◽  
Yoon-Geol Choi ◽  
Hyeon-Seok Lee ◽  
Sang-Won Lee ◽  
Su-Chang Lee ◽  
...  
Keyword(s):  
Energy Storage ◽  
Output Voltage ◽  
High Efficiency ◽  
Storage System ◽  
Core Loss ◽  
Input Voltage ◽  
Switching Frequency ◽  
Input Output ◽  
Voltage Range ◽  
Output Filter

This paper proposes a bidirectional dc–dc converter for residential micro-grid applications. The proposed converter can operate over an input voltage range that overlaps the output voltage range. This converter uses two snubber capacitors to reduce the switch turn-off losses, a dc-blocking capacitor to reduce the input/output filter size, and a 1:1 transformer to reduce core loss. The windings of the transformer are connected in parallel and in reverse-coupled configuration to suppress magnetic flux swing in the core. Zero-voltage turn-on of the switch is achieved by operating the converter in discontinuous conduction mode. The experimental converter was designed to operate at a switching frequency of 40–210 kHz, an input voltage of 48 V, an output voltage of 36–60 V, and an output power of 50–500 W. The power conversion efficiency for boost conversion to 60 V was ≥98.3% in the entire power range. The efficiency for buck conversion to 36 V was ≥98.4% in the entire power range. The output voltage ripple at full load was <3.59 Vp.p for boost conversion (60 V) and 1.35 Vp.p for buck conversion (36 V) with the reduced input/output filter. The experimental results indicate that the proposed converter is well-suited to smart-grid energy storage systems that require high efficiency, small size, and overlapping input and output voltage ranges.

scholarly journals Extra-High-Voltage DC-DC Boost Converters Topology with Simple Control Strategy

2008 ◽  
Vol 2008 ◽  
pp. 1-8 ◽  
Author(s):  
P. Sanjeevikumar ◽  
K. Rajambal
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
Control Algorithm ◽  
High Efficiency ◽  
Low Cost ◽  
Buck Converter ◽  
Boost Converters ◽  
Wide Range ◽  
Power Transfer Efficiency ◽  
Extra High Voltage

This paper presents the topology of operating DC-DC buck converter in boost mode for extra-high-voltage applications. Traditional DC-DC boost converters are used in high-voltage applications, but they are not economical due to the limited output voltage, efficiency and they require two sensors with complex control algorithm. Moreover, due to the effect of parasitic elements the output voltage and power transfer efficiency of DC-DC converters are limited. These limitations are overcome by using the voltage lift technique, opens a good way to improve the performance characteristics of DC-DC converter. The technique is applied to DC-DC converter and a simplified control algorithm in this paper. The performance of the controller is studied for both line and load disturbances. These converters perform positive DC-DC voltage increasing conversion with high power density, high efficiency, low cost in simple structure, small ripples, and wide range of control. Simulation results along theoretical analysis are provided to verify its performance.

scholarly journals A Fast and Simple Fault Diagnosis Method for Interleaved DC-DC Converters Based on Output Voltage Analysis

Electronics ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1451
Author(s):  
Po Li ◽  
Xiang Li ◽  
Tao Zeng
Keyword(s):  
Output Voltage ◽  
High Efficiency ◽  
Tidal Energy ◽  
Open Circuit ◽  
Buck Converter ◽  
Switching Frequency ◽  
Harmonic Amplitude ◽  
Non Invasive ◽  
New Energy ◽  
Diagnosis Method

Interleaved DC-DC converters have been widely used in power conversion due to their high efficiency and reliability. In the application of new energy, this plays an increasingly important role in the grid-connected power generation of wind, solar, and tidal energy. Therefore, it is crucial to ensure the reliability and proper operation of interleaved DC-DC converters. We studied an open circuit fault (OCF) diagnosis method for a three-phase interleaved buck converter. We propose a non-invasive diagnosis method based on the output voltage using the harmonic amplitude and phase at the switching frequency as the diagnostic criteria. Evaluation was carried out on a hardware-in-the-loop (HIL) test platform to prove the validity of the proposed method. The results show that the presented method had high accuracy and robustness against OCFs, which could otherwise damage the system.

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