Parameter Analysis of the Output Filter for Switching Buck Converter in Wideband Envelope Modulator

2021 ◽  
Author(s):  
Deng-Fong Lu ◽  
Wen-Hao Fan ◽  
Chin Hsia
Keyword(s):  
Buck Converter ◽  
Parameter Analysis ◽  
Output Filter

scholarly journals Investigation into Magnetic Control of Hard-Switching DC-DC Converters

2020 ◽  
Author(s):  
J. Marcos Alonso ◽  
Héctor Chinchero ◽  
Guirguis Z. Abdelmessih ◽  
Yueshi Guan ◽  
Yijie Wang
Keyword(s):  
Control Method ◽  
Buck Converter ◽  
Magnetic Control ◽  
Control Parameters ◽  
Modeling Process ◽  
Converter Topology ◽  
Variable Inductance ◽  
Output Filter ◽  
Conduction Mode

In this paper an investigation into magnetic control (MC) of hard-switching (HS) DC-DC converters is carried out. The proposed control method is based on the modulation of the effective filter inductance of the converter when operating in discontinuous conduction mode (DCM). It is well known that the output characteristic of a HS DC-DC converter operating in DCM is dependent on the effective inductance of the output filter. This way, by using a variable inductance the output of the converter can be controlled. The proposed control method can be applied to any converter topology, namely buck, boost, buck-boost, flyback, forward, and so on. In this paper, the operation of the buck converter with MC is investigated in detail as a case study. This work proves that the proposed control method can be effectively used to control DC-DC converters on its own or by combination with other control parameters as duty cycle and/or frequency. An experimental prototype has been built to test the proposed control method and modeling process and to demonstrate its feasibility and possibilities.

scholarly journals Design of a Two-Phase Buck Converter With Fourth-Order Output Filter for Envelope Amplifiers of Limited Bandwidth

2014 ◽  
Vol 29 (11) ◽  
pp. 5933-5948 ◽  
Author(s):  
J. Sebastian ◽  
P. Fernandez-Miaja ◽  
F. J. Ortega-Gonzalez ◽  
Moises Patino ◽  
M. Rodriguez
Keyword(s):  
Fourth Order ◽  
Buck Converter ◽  
Two Phase ◽  
Limited Bandwidth ◽  
Output Filter

scholarly journals Investigation into Magnetic Control of Hard-Switching DC-DC Converters

2020 ◽  
Author(s):  
J. Marcos Alonso ◽  
Héctor Chinchero ◽  
Guirguis Z. Abdelmessih ◽  
Yueshi Guan ◽  
Yijie Wang
Keyword(s):  
Control Method ◽  
Buck Converter ◽  
Magnetic Control ◽  
Control Parameters ◽  
Modeling Process ◽  
Converter Topology ◽  
Variable Inductance ◽  
Output Filter ◽  
Conduction Mode

In this paper an investigation into magnetic control (MC) of hard-switching (HS) DC-DC converters is carried out. The proposed control method is based on the modulation of the effective filter inductance of the converter when operating in discontinuous conduction mode (DCM). It is well known that the output characteristic of a HS DC-DC converter operating in DCM is dependent on the effective inductance of the output filter. This way, by using a variable inductance the output of the converter can be controlled. The proposed control method can be applied to any converter topology, namely buck, boost, buck-boost, flyback, forward, and so on. In this paper, the operation of the buck converter with MC is investigated in detail as a case study. This work proves that the proposed control method can be effectively used to control DC-DC converters on its own or by combination with other control parameters as duty cycle and/or frequency. An experimental prototype has been built to test the proposed control method and modeling process and to demonstrate its feasibility and possibilities.

scholarly journals Effects of Spread Spectrum on Output Filter of Buck Converter

2013 ◽  
Vol 19 (5) ◽  
Author(s):  
J. Jankovskis ◽  
D. Stepins ◽  
N. Ponomarenko
Keyword(s):  
Spread Spectrum ◽  
Buck Converter ◽  
Output Filter

A high-speed buck converter for efficiency enhancement of W-CDMA power amplifiers

2012 ◽  
Vol 4 (5) ◽  
pp. 505-514 ◽  
Author(s):  
Falk Haßler ◽  
Frank Ellinger ◽  
Udo Jörges ◽  
Robert Wolf ◽  
Bastian Lindner
Keyword(s):  
Power Amplifiers ◽  
High Speed ◽  
Dynamic Performance ◽  
Buck Converter ◽  
Modulation Scheme ◽  
Efficiency Enhancement ◽  
Resource Saving ◽  
Industry Standard ◽  
Code Division Multiple ◽  
Output Filter

We present a design strategy for a buck converter, which fulfills the high dynamic requirements of efficient envelope amplifier needed by modern efficiency enhancement techniques for power amplifiers. The proposed DC–DC converter has an innovative control system, which makes it fast, robust, and resource saving. A mathematical model describes its dynamic behavior and is used to find a setup, which gives an optimal compromise between the dynamic performance and efficiency. The approach is applicable to various state-of-the-art communication standards. As an example, an envelope following (EF) power amplifier (PA) for the wideband code-division-multiple-access (W-CDMA) modulation scheme is treated. The corresponding buck converter is implemented in a monolithic chip (except the inductor and the capacitor of the output filter). The measurements with an industry standard W-CDMA PA (RMPA2265) match very well with the forecast of the model and confirm doubling of the average efficiency.

Study on EMI Reduction of DC-DC Buck Converter

2014 ◽  
Vol 893 ◽  
pp. 742-746
Author(s):  
Long Huang ◽  
Fang Ping Yu ◽  
Tai Long Liu ◽  
Peng Li ◽  
Qi Dou Wu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Low Frequency ◽  
Buck Converter ◽  
Automotive Electronics ◽  
Loop Area ◽  
Conducted Emission ◽  
Ac Current ◽  
Radiation Noise ◽  
Cispr 25 ◽  
Output Filter

DC-DC buck converter has been more widely used in automotive electronics because of its advantage of high efficiency and small size. However, it is one of the main causes of the conducted emission and radiation noise. The working principle and the mechanism of DC-DC buck converter which generate conducted emission and radiation noise in different frequency were analyzed. Then, two methods were proposed to reduce the low frequency radiated emission. One is weakening the AC current value of the inductor current through increasing the value of the output inductor, the other is reducing the loop area by adding the output filter, and both of the methods were verified by comparative test. Finally, the two schemes were used in designing the On-board controller, and it passed the radiated emissions (ALSE method) according to the international standard CISPR 25-2008.

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