New electrolytic capacitor-less LED driver based on model predictive control

Liao, Zhiling; Qiu, Diancheng; Zhang, Shanshan; Cao, Chenchen

doi:10.1016/j.ijleo.2019.163324

Cited by 11 publications

(4 citation statements)

References 11 publications

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“…Especially in street lighting the devices are exposed to high thermal stress. A study of predictive control for a capacitor-less LED driver can be found in [11]. In this case no capacitor is used parallel to the load, but capacitors are necessary in the used PFC.…”

Section: Introductionmentioning

confidence: 99%

A capacitor-free driving stage for light emitting diodes

Himmelstoss¹,

Windisch²

2024

RE&PQJ

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Electrolytic capacitors have the disadvantage of pronounced aging. Non-electrolytic capacitors are therefore used in applications where long-life is important. In this paper we present a driving stage for LEDs without any capacitive elements. The basic topology is a Buck converter with one coil, one active, and one passive switch. Instead of the output capacitor, series connections of one or more LEDs and an active switch are connected. An additional diode is connected between the output and the input to achieve a current path, when all LEDpaths are off. A nonlinear hysteresis controller is used to achieve a robust control. A system with three switchable LED-strings is analyzed. Design hints are given and the function is proved with the help of LTSpice simulations. The system can be used for lighting purposes with the possibility to change the chrominance. The potentiality to transmit data is also treated.

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Section: Introductionmentioning

confidence: 99%

A capacitor-free driving stage for light emitting diodes

Himmelstoss¹,

Windisch²

2024

RE&PQJ

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“…Compared to other traditional lamps, it has advantages such as a long lifespan [ 1 , 2 ], high light efficiency [ 3 ], low energy consumption [ 4 ], high colour rendering index [ 5 , 6 ], and high reliability [ 7 ]. In practice, faulty LED lamps can cause a decrease in light efficiency, even lead to flicker, and affect visual comfort [ 8 , 9 ]. Obviously, fault detection and diagnosis are critical to ensure the energy-saving, healthy, and safe operation of LED lamps.…”

Section: Introductionmentioning

confidence: 99%

A novel fault diagnosis strategy for LED lamps via light output time-frequency characteristics analysis and machine learning

Shang,

Sun,

Fang

et al. 2023

Heliyon

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“…According to the component characteristics in the third stage, many alternative solutions have been proposed to avoid the use of a bulky and low-reliability device [13][14][15][16][17]. Some of these solutions have been classified into two principal groups [18][19][20][21][22][23][24][25][26]: passive and active power-decoupling methods (PPD and APD, respectively).…”

Section: Introductionmentioning

confidence: 99%

Active Power-Decoupling Methods for Photovoltaic-Connected Applications: An Overview

Rodríguez-Benítez,

Ponce-Silva,

Aqui-Tapia

et al. 2023

Processes

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This study compares ripple port, stacked switched capacitor, and capacitive energy storage architectures for active power decoupling, comparing the number of components, performance, energy density, DC-link capacitor reduction, efficiency, and frequency operation to highlight their main benefits and drawbacks for single-phase grid-connected applications. The overview reveals equivalent effective energy density without electrolytic capacitors, as well as enhanced simplicity, performance, and durability, thereby providing stacked switched capacitors as an attractive power-decoupling alternative for multi-stage connected applications, based on the principle that its individual buffer capacitors absorb and deliver energy without tightly constraining their individual terminal voltages, while maintaining a narrow range voltage at the buffer DC port.

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New electrolytic capacitor-less LED driver based on model predictive control

Cited by 11 publications

References 11 publications

A capacitor-free driving stage for light emitting diodes

A capacitor-free driving stage for light emitting diodes

A novel fault diagnosis strategy for LED lamps via light output time-frequency characteristics analysis and machine learning

Active Power-Decoupling Methods for Photovoltaic-Connected Applications: An Overview

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