Drain-Voltage Balance and Phase-Shifted PWM Control Schemes for High-Efficiency Parallel-String Dimmable LED Drivers

2018 ◽  
Vol 65 (8) ◽  
pp. 6168-6176 ◽  
Author(s):  
Pang-Jung Liu ◽  
Yu-Chi Hsu ◽  
Shang-Ru Hsu
Keyword(s):  
High Efficiency ◽  
Pwm Control ◽  
Drain Voltage ◽  
Control Schemes ◽  
Voltage Balance ◽  
Led Drivers

Parameters Design of Main Circuit of AC Constant Voltage Power Supply Based on Dual Directional Reversible PWM Control

2011 ◽  
Vol 383-390 ◽  
pp. 5771-5777
Author(s):  
Yu Quan Ma ◽  
Li Hong Zhang ◽  
Shu Fen Han ◽  
Zhi Peng Lin
Keyword(s):  
High Precision ◽  
Power Supply ◽  
Small Volume ◽  
High Efficiency ◽  
Pwm Control ◽  
Constant Voltage ◽  
Dc Voltage ◽  
Quality Of Supply ◽  
Parameters Calculation

The constant voltage power supply with dual directional reversible PWM compensation has merits of high precision, high efficiency, small volume, and so on. To ensure the quality of supply, it is important to fix the value of inductance, capacitance in main circuit. From the angle of filtering, and through analysis of the circuit working, detailed formulas of the inductance and capacitance calculation are given and an example of it is given too. In parameters calculation, to reduce the volume, the filter inductance is taken a smaller value but the capacitance is taken a greater value; the DC smoothing capacitance should be chosen according to the amplitude limit of DC voltage rising in inversion, and should be taken as great as possible to maintain voltage stabilizing precision.

The Output Researching of a Cascaded Multilevel Class-D Power Amplifier

2012 ◽  
Vol 482-484 ◽  
pp. 3-10
Author(s):  
Guo Hua Xu ◽  
Ying Zhang ◽  
Ming Dong ◽  
Qing De Meng
Keyword(s):  
Power Amplifier ◽  
Single Phase ◽  
High Efficiency ◽  
Pwm Control ◽  
Circuit Topology ◽  
Class D ◽  
Switch Mode

A high efficiency switch-mode power amplifier based on a cascaded multicell multilevel circuit topology is introduced in the paper. A multicell topology being operated in a unipolar phase-shifted PWM control to switch-mode amplifier system is introduced. After analysising a single-phase H-bridge unipolar PWM inverter’s output, the paper emphasis on the researching of the output of a Cascaded Multilevel Class-D Power Amplifier. The paper analyzes the advanced characteristic of the cascaded multilevel technique. Then a cascaded multilevel class-D power amplifier is built in the laboratory. The result of measurement shows a good following performance and stability.

High efficiency single-inductor dual-output DC-DC converter with ZVS-PWM control

2015 ◽  
Author(s):  
Yoshiki Sunaga ◽  
Naoya Shiraishi ◽  
Koyo Asaishi ◽  
Nobukazu Tsukiji ◽  
Yasunori Kobori ◽  
...  
Keyword(s):  
High Efficiency ◽  
Pwm Control

Static Regulated Multistage Semiactive LED Drivers for High-Efficiency Applications

2016 ◽  
Vol 31 (9) ◽  
pp. 6543-6552 ◽  
Author(s):  
Eun S. Lee ◽  
Bo H. Choi ◽  
Duy T. Nguyen ◽  
Byeung G. Choi ◽  
Chun T. Rim
Keyword(s):  
High Efficiency ◽  
Led Drivers
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