An LED Driver Circuit with Partial Power Regulation for Photovoltaic Warning-Light

2019 ◽  
Author(s):  
You-Chun Huang ◽  
Chin-Sien Moo ◽  
Wan-Jung Chen ◽  
Shih-An Yin
Keyword(s):  
Led Driver ◽  
Warning Light ◽  
Power Regulation ◽  
Driver Circuit

scholarly journals A High Efficiency LED Driver Circuit using LLC Resonant Converter

2010 ◽  
Vol 15 (1) ◽  
pp. 35-42 ◽  
Author(s):  
Dae-Seong Shin ◽  
Young-Jin Jung ◽  
Sung-Soo Hong ◽  
Sang-Kyu Han ◽  
Byung-Jun Jang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Resonant Converter ◽  
Led Driver ◽  
Driver Circuit ◽  
Llc Resonant Converter

The Multi-Scenario Semiconductor Lighting Control of Driver Refactoring

2015 ◽  
Vol 743 ◽  
pp. 209-213
Author(s):  
Jun Shi Li ◽  
Feng Xiong ◽  
Guo Qing Qu
Keyword(s):  
Control System ◽  
Remote Control ◽  
Control Method ◽  
Led Driver ◽  
Lighting Control ◽  
Zone Control ◽  
Driver Circuit ◽  
Working Principle ◽  
Hardware Circuit ◽  
The Internet Of Things

In view of the inefficiency and the poor flexibility of the recent intelligent lighting control system, this paper proposes a new control method starting from sensor, controller and LED driver circuit, meanwhile connecting with the Internet of things technologies. The most striking feature of this control is that it is refactored in the aspect of the whole system, which can reach the purposes of scene control, timing control, multi-zone control and remote control, etc. This paper also elaborates the hardware circuit design and the working principle of the control system and the method to realize the remote control. The system can operate simply, control efficiently, transmit reliably, manage easily.

A Dynamic Response of a Module/Array Simulator Using I-V Magnifier Circuit of a PN Photo-Sensor

Solar Energy ◽  
2003 ◽  
Author(s):  
Hiroshi Nagayoshi
Keyword(s):  
Dynamic Response ◽  
Personal Computer ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Maximum Power ◽  
Current Gain ◽  
Led Driver ◽  
Photo Sensor ◽  
Driver Circuit ◽  
Basic Characteristics

Basic characteristics and dynamic response of a 30W module/array simulator using PV I-V magnifier circuit was studied. It was confirmed that each gain of voltage and current was independently adjustable using feedback control of current signal. Simulator circuit output power is controlled by LED irradiation light which works as an irradiation of sun light to real PV modules. Maximum power of the circuit depends on maximum power of the power amplifier used in the circuit. A photo-current of pn photo-sensor was some micro ampere hence the current gain of the simulator needed more than 50dB. The voltage gain was not more than 3dB because a multi junction pn photo-sensor was used. To control the simulator circuit by personal computer, an LED driver circuit was added. A fill factor was also easily changeable by change of shunt resistor connected with pn photo-sensor in parallel. A dynamic response of short circuit current was measured and confirmed that the circuit has enough response ability to apply the MPPT evaluation. A grand line of each module is isolated, hence any topology of connections is available. This circuit simplifies the control system and makes it easy to handle multi simulator units by one personal computer. This system is suitable for the evaluation of multi inverter system.

The Design of High Power LED Driver Power Supply Based on the Pattern of LLC Harmonic

2014 ◽  
Vol 997 ◽  
pp. 862-867
Author(s):  
Ting Cao
Keyword(s):  
High Power ◽  
Power Supply ◽  
High Efficiency ◽  
Low Loss ◽  
Led Driver ◽  
High Power Led ◽  
Driver Circuit ◽  
Llc Resonant Converter ◽  
Working Principle ◽  
Conduction Mode

The working principle of LLC resonant converter is analyzed. On the basis of the analysis, a high power LED driver power supply circuit is designed based on LLC resonant model. Driver circuit is two-stage: the pre-driver circuit using boundary-conduction mode controller L6562 achieves PFC function, while the post-stage LLC half-bridge topology provides constant pressure parts. This structure makes the overall efficiency of the circuit is higher. And the simulation experiment of the circuit is carried out and the experimental results verify that the driver power supply can achieve high efficiency, low loss and so on.

scholarly journals Dimmable High Power LED Driver Using Fuzzy Logic Controller

2021 ◽  
Vol 5 (2) ◽  
pp. 45
Author(s):  
Rizky Fatur Rochman ◽  
Eka Prasetyono ◽  
Rachma Prilian Eviningsih
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic Controller ◽  
Constant Current ◽  
Led Driver ◽  
Flyback Converter ◽  
Compact Size ◽  
Wide Range ◽  
Driver Circuit ◽  
Converter Topology ◽  
Lighting Loads

The use of lighting loads is one of the crucial matters which increases every year. The increasing use then leads to the development of brighter and longer-lasting sources. In addition, the conventional use of lighting loads today, which only emit light at its maximum intensity, does not allow the consumers to adjust the brightness level as needed. Consequently, this condition may cause energy wastage. The LED lighting system is gaining popularity as it is widely used in a wide range of applications. The advantages of LEDs, such as its compact size and varied lamp colors, replace conventional lighting sources. The linear setting of the driver topology using the flyback converter was aimed to control the LEDs with a constant current in order to adjust the variation of the LED light intensity. The closed-loop driver circuit with flyback converter topology was designed as an LED driver with a given load specification from the LED string. A dimmable feature was included for adjusting the intensity of the light produced by the LEDs. Eventually, the fuzzy logic controller (FLC) method was applied to the integrated change setting to obtain a dynamic response.

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