A New Capacitor-Less Buck DC-DC Converter for LED Applications

Al-Absi, Munir A.; Khalifa, Zainulabideen Jamal; Hussein, A.

doi:10.1155/2017/2365848

Cited by 8 publications

(4 citation statements)

References 10 publications

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“…The measured power factor is found to be 0.98. 90 It utilizes the LED internal capacitance and replaces the smoothing capacitor for minimizing the output ripple. It is well suited for low power level offline driver applications.…”

Section: A Single-stage Led Driver For Low Power Applicationsmentioning

confidence: 99%

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An overview of energy efficient solid state LED driver topologies

Yadlapalli

Narasipuram²,

Anuradha³

2019

Int J Energy Res

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LED lamps are projected as prospective successors of incandescent lamps with high efficiency and a long lifetime. Therefore, there is a need to develop energy efficient LED driver topologies for achieving constant current regulation, despite the effects of temperature on the LED V-I characteristics. This paper presents the salient features of various LED driver topologies with a focus on power density, multi-string operation, renewable energy utilization, soft switching, optical wireless communication, reliability and size. The performance of the above topologies is analysed in terms of the number of components, converter switching frequency, galvanic isolation, power rating and efficiency. This paper takes a look at efficiency improvement methods while dwelling on aspects of lifetime and reliability prediction of LED drivers. The paper will anticipate some of the future trends associated with the adaptation of wide bandgap power semiconductor materials, smart LED lighting for the internet of things (IoT) and programmable LED lamp drivers. This detailed technology review is extremely useful for researchers, designers and engineers in choosing the right topology.

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Section: A Single-stage Led Driver For Low Power Applicationsmentioning

confidence: 99%

“…Figure 17 shows a capacitor-less DC-DC converter as an LED driver. 90 It utilizes the LED internal capacitance and replaces the smoothing capacitor for minimizing the output ripple. Thus, the driver life time is enhanced due to absence of electrolytic capacitors.…”

Section: A Single-stage Led Driver For Low Power Applicationsmentioning

confidence: 99%

An overview of energy efficient solid state LED driver topologies

Yadlapalli

Narasipuram²,

Anuradha³

2019

Int J Energy Res

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“…Consequently, nowadays LED lights take an important place in our daily lives and have become a viable alternative to conventional low efficiency light sources like incandescent, CFL (compact fluorescent lamp) and HID (high intensity discharge) lamps. LED lighting systems have better characteristics than conventional lighting systems such as energy saving, long life spans and color rendering [1]- [8] and they play an important role in future indoor as well as outdoor lighting applications. To operate properly with respect of energy saving, high efficiency and minimum electric constraints, these light sources demand a specific driver.…”

Section: Introductionmentioning

confidence: 99%

Study and Implementation of LEDs Drivers with Dimming Capability

Mrabet¹,

Chammam²

2021

Adv. sci. technol. eng. syst. j.

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Nowadays, LED lights take an important place in our daily lives and they have known a great growth in indoor as well as in outdoor lighting applications. LED (Light Emitting Diode) light sources including their own drivers have excluded many systems fitted with both inefficient light sources. In this paper we present, a LED driver handling a DC input power supply and piloting a series of powered LEDs Some topologies of LED driver supplying a constant voltage or a constant current toward a LED load and their operations are detailed and presented. In this regard, two types of DC-DC converter in occurrence buck and boost converter are analyzed, designed, and simulated. Furthermore, a design of laboratory prototype of constant-current LED drivers based on DC-DC buck converter totally dimed is achieved, and tested. Calculated and experimental results are in good correspondence with very small deviation of LED current in both cases for different levels of dimming.

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“…To address this issue, energy storage (ES) systems with the ability to store and dispatch electricity are connected to compensate for the generation fluctuations of RESs. The battery has become a candidate of grid-tie large scale RESs power plants with its increasing deployable capability and reducing cost [3]. Additionally, the high voltage direct current (HVDC) transmission method is preferred for large-scale renewable power plants that have a large output power scale and long-distance transmission because HVDC transmission has the advantages of low cost and high transfer efficiency [4][5][6] compared with the conventional high voltage alternating current (HVAC) transmission.…”

Section: Introductionmentioning

confidence: 99%

Modular Multi-Port Ultra-High Power Level Power Converter Integrated with Energy Storage for High Voltage Direct Current (HVDC) Transmission

Song

Li²,

et al. 2018

Energies

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To connect renewable energy sources (RESs) with a unity-grid, energy storage (ES) systems are essential to eliminate the weather fluctuation effect, and high voltage direct current (HVDC) transmission is preferred for large-scale RESs power plants due to the merits of low cost and high efficiency. This paper proposes a multi-port bidirectional DC/DC converter consisting of multiple modules that can integrate ES system and HVDC transmission. Thanks to the adoption of three-port converters as submodules (SMs), ES devices, for example, batteries, can be decentralized into SMs and controlled directly by the SMs. Additionally, SMs are connected in a scalable matrix topology, presenting the advantages of flexible power flows, high voltage step-up ratios and low voltage/current ratings of components to satisfy the requirements of HVDC transmission. Furthermore, the control flexibility and fault tolerance capability are increased due to the matrix topology. In this paper, the analysis of the novel modular multi-port converter is introduced, and its functions are verified by the simulation results in PSIM.

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A New Capacitor-Less Buck DC-DC Converter for LED Applications

Cited by 8 publications

References 10 publications

An overview of energy efficient solid state LED driver topologies

An overview of energy efficient solid state LED driver topologies

Study and Implementation of LEDs Drivers with Dimming Capability

Modular Multi-Port Ultra-High Power Level Power Converter Integrated with Energy Storage for High Voltage Direct Current (HVDC) Transmission

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