A Review and Analysis of Topologies of Light Emitting Diode (LED) Drivers

Gupta, Neha; Verma, Deepak

doi:10.1109/icepes52894.2021.9699637

Cited by 7 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Presently, LED drives are mainly divided into two types: constant voltage and constant current [27][28][29][30][31]. An RC buck drive is a representative constant voltage drive.…”

Section: Resultsmentioning

confidence: 99%

Experimental Interharmonic Sensitivity Evaluation of LED Lamps Based on the Luminous Flux Flicker Model

Song

Zhu

et al. 2022

Energies

View full text Add to dashboard Cite

LED lamps have gradually replaced other lighting sources and have become mainstream in the lighting industry. The research on interharmonic sensitivity affecting their lighting quality cannot be ignored. By deconstructing the lamp-eye-brain module in the International Electrotechnical Commission (IEC) flicker model, a luminous flux flicker model without the constraints of a specific light source was proposed. The test system and corresponding analysis method of the interharmonic-luminous flux transfer coefficient in the model were described in detail, and the accuracy of the test results of the system was verified via incandescent lamp heat balance model simulations. Based on the test results, the conversion method of the interharmonic ratio of LED lamps under the flicker limit based on the interharmonic-flicker limit curve of incandescent lamps was deduced. By testing and comparing the differences in interharmonic-flicker limit curves of different driving types of LED lamps, the experimental evaluation of their sensitivity was completed, and the reference for LED lamp selection, driver design, and compatibility standard formulation in different application scenarios was provided.

show abstract

“…Presently, LED drives are mainly divided into two types: constant voltage and constant current [27][28][29][30][31]. An RC buck drive is a representative constant voltage drive.…”

Section: Resultsmentioning

confidence: 99%

Experimental Interharmonic Sensitivity Evaluation of LED Lamps Based on the Luminous Flux Flicker Model

Song

Zhu

et al. 2022

Energies

View full text Add to dashboard Cite

show abstract

“…Although the relative in uence of short and longer wavelengths ranges are roughly in balance in natural sunlight, they are not in light generated from LEDs that now dominate the built environment. Here there are almost no longer wavelength above 650nm with the light being dominated by short wavelengths with peaks commonly around 450nm 11 .…”

Section: Introductionmentioning

confidence: 98%

Exposure to short wavelength light absorbed by mitochondria is associated with weight gain, shifts in cytokine expression and anxiety-like behaviours.

Al-Hussaini,

Al-Onaizi,

Abed

et al. 2024

Preprint

View full text Add to dashboard Cite

Mitochondria absorb short wavelengths around 420nm. This is associated with reduced ATP and restricted mobility. The 420-450nm range is a significant element of LED lighting and computer monitors. Here we expose freely moving mice to 420nm or 450nm lighting and show rapidly weight gain within a week. This may be due to reduced mitochondrial demand for circulating carbohydrates. Both groups displayed marked shifts in serum cytokines. Open field mobility was examined. The distance travelled was similar between both experimental groups and their controls. However, both experimental groups showed avoidance of central regions consistent with anxiety-like behaviours. This was significant in the 420nm group whose wavelength exposure is closer to peak mitochondrial absorbance. These data demonstrate the potential hazards of exposure to specific short wavelengths in the visual range now common in the built environment. Data are consistent with a wider literature on systemic problems arising from exposure to short wavelength light.

show abstract

“…Although a control loop may decrease the LED current ripple, however, it is difficult to include many tasks in a single converter, including PFC, constant LED load current, long lifespan, and high efficiency. Consequently, multiple stages can be used and PFC is typically performed in one stage, whereas power control (PC) is performed in the other stage 15,16 . These stages can be combined into a cascade, integrated, and partial cascade.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, multiple stages can be used and PFC is typically performed in one stage, whereas power control (PC) is performed in the other stage. 15,16 These stages can be combined into a cascade, integrated, and partial cascade. Cascade connections, as shown in Figure 1, offer greater design freedom, lower capacitance, and more sophisticated driving capabilities.…”

mentioning

confidence: 99%

Electrolytic capacitor‐less reduced power processing single‐phase LED driver with power decoupling using split capacitor

Pallapati

Chinthamalla

2023

Circuit Theory & Apps

View full text Add to dashboard Cite

Summary Light emitting diode (LED) driver systems are now moving toward reduced processing power to improve conversion efficiency in indoor and outdoor applications. LED drivers connected to a single‐phase supply must meet the requirements for power factor correction with lower input current harmonics to maintain the alternating current (AC) power grid's quality and maintain a constant current through the LED load to eliminate the flickering effect in the light output. An LED driver is required to fulfill these requirements. In this paper, a new reduced processing power LED driver is proposed. By splitting the output capacitor into two capacitors and with the help of hardware design, the processing power can be reduced by using fewer semiconductors than in earlier designs. The proposed driver employs a simple ripple cancellation control approach to eliminate the 100 Hz ripple in the LED load current. Using this principle, an LED driver was designed and tested. The experimental results demonstrated that the proposed LED driver achieved an input power factor close to unity with lower input current harmonics and 92.5% of peak efficiency when operating at full power.

show abstract

A Review and Analysis of Topologies of Light Emitting Diode (LED) Drivers

Cited by 7 publications

References 14 publications

Experimental Interharmonic Sensitivity Evaluation of LED Lamps Based on the Luminous Flux Flicker Model

Experimental Interharmonic Sensitivity Evaluation of LED Lamps Based on the Luminous Flux Flicker Model

Exposure to short wavelength light absorbed by mitochondria is associated with weight gain, shifts in cytokine expression and anxiety-like behaviours.

Electrolytic capacitor‐less reduced power processing single‐phase LED driver with power decoupling using split capacitor

Contact Info

Product

Resources

About