A Novel Passive Offline LED Driver With Long Lifetime

Hui, S.Y.R.; Li, Sinan; Xue, Tao; Chen, Wu; Ng, Wai Man

doi:10.1109/tpel.2010.2048436

Cited by 166 publications

(65 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Latest developments and applications of solid-state lighting have begun gaining greater attention due to the requirements for efficient energy usage nowadays [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. With features of energy-savings, lower maintenance costs and long lifetime, light-emitting diode (LED) tube lamps have begun to be favorable alternatives to replace traditional T8/T10-type fluorescent lamps in building-lighting applications [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

A Single-Stage LED Tube Lamp Driver with Power-Factor Corrections and Soft Switching for Energy-Saving Indoor Lighting Applications

et al. 2017

View full text Add to dashboard Cite

This paper presents a single-stage alternating current (AC)/direct current (DC) light-emitting diode (LED) tube lamp driver for energy-saving indoor lighting applications; this driver features power-factor corrections and soft switching, and also integrates a dual buck-boost converter with coupled inductors and a half-bridge series resonant converter cascaded with a bridge rectifier into a single-stage power-conversion topology. The features of the presented driver are high efficiency (>91%), satisfying power factor (PF > 0.96), low input-current total-harmonic distortion (THD < 10%), low output voltage ripple factor (<7.5%), low output current ripple factor (<8%), and zero-voltage switching (ZVS) obtained on both power switches. Operational principles are described in detail, and experimental results obtained from an 18 W-rated LED tube lamp for T8/T10 fluorescent lamp replacements with input utility-line voltages ranging from 100 V to 120 V have demonstrated the functionality of the presented driver suitable for indoor lighting applications.

show abstract

Section: Introductionmentioning

confidence: 99%

A Single-Stage LED Tube Lamp Driver with Power-Factor Corrections and Soft Switching for Energy-Saving Indoor Lighting Applications

et al. 2017

View full text Add to dashboard Cite

show abstract

“…These drawbacks reduce the total lifetime of LED lighting systems composed of LED lamps and dedicated LED drivers. Hence, passive LED drivers are preferred because of their extremely high power efficiency and long life [25]- [29]. Even though switching devices such as MOSFET and BJT are not adopted in the LED drivers, the PF and THD characteristics can be satisfied with global standards with a simple structure.…”

Section: Introductionmentioning

confidence: 99%

Long-Lasting and Highly Efficient TRIAC Dimming LED Driver with a Variable Switched Capacitor

Lee¹,

Choi²,

Nguyen³

et al. 2016

Journal of Power Electronics

View full text Add to dashboard Cite

A triode for alternating current (TRIAC) dimming light emitting diode (LED) driver, which adopts a variable switched capacitor for LED dimming and LED power regulation, is proposed in this paper. The proposed LED driver is power efficient, reliable, and long lasting because of the TRIAC switch that serves as its main switch. Similar to previous TRIAC dimmers for lamps, turn-on timing of a TRIAC switch can be controlled by a volume resistor, which modulates the equivalent capacitance of the proposed variable switched capacitor. Thus, LED power regulation against source voltage variation and LED dimming control can be achieved by the proposed LED driver while meeting the global standards for power factor (PF) and total harmonic distortion (THD). The long life and high power efficiency of the proposed LED driver make it appropriate for industrial lighting applications, such as those for streets, factories, parking garages, and emergency stairs. The detailed analysis of the proposed LED driver and its design procedure are presented in this paper. A prototype of 80 W was fabricated and verified by experiments, which showed that the efficiency, PF, and THD at V s = 220 V are 93.8%, 0.95, and 22.5%, respectively; 65 W of LED dimming control was achieved with the volume resistor, and the LED power variation was well mitigated below 3.75% for 190 V < V s < 250 V.

show abstract

“…However, the SMPS-type LED drivers suffer from large switching losses and shorter lifespans than the LED itself due to the high junction temperature of the main switches [9]- [20]. As an alternative solution, passive-type LED drivers are preferred due to their very high efficiency and extremely long lifespan [21]- [24]. However, the inherent drawbacks of the passive-type LED drivers include their lack of current regulation capability and a relatively large filter size, where this filter size problem can be mitigated by virtue of a reduced heat sink and a compact coil design.…”

Section: Introductionmentioning

confidence: 99%

LED Driver with TRIAC Dimming Control by Variable Switched Capacitance for Power Regulation

Lee¹,

Sohn²,

Nguyen³

et al. 2015

Journal of Power Electronics

View full text Add to dashboard Cite

A TRIAC dimming LED driver that can control the brightness of LED arrays for a wide range of source voltage variations is proposed in this paper. Unlike conventional PWM LED drivers, the proposed LED driver adopts a TRIAC switch, which inherently guarantees zero current switching and has been proven to be quite reliable over its long lifetime. Unlike previous TRIAC type LED drivers, the proposed LED driver is composed of an LC input filter and a variable switched capacitance, which is modulated by the TRIAC turn-on timing. Thus, the LED power regulation and dimming control, which are done by a volume resistor in the same way as the conventional TRIAC dimmers, can be simultaneously performed by the TRIAC control circuit. Because the proposed LED driver has high efficiency and a long lifetime with a high power factor (PF) and low total harmonic distortion (THD) characteristics, it is quite adequate for industrial lighting applications such as streets, factories, parking garages, and emergency stairs. A simple step-down capacitive power supply circuit composed of passive components only is also proposed, which is quite useful for providing DC power from an AC source without a bulky and heavy transformer. A prototype 60 W LED driver was implemented by the proposed design procedure and verified by simulation and experimental results, where the efficiency, PF, and THD are 92%, 0.94, and 6.3%, respectively. The LED power variation is well mitigated to below ± 2% for 190 V < V s < 250 V by using the proposed simple control circuit.

show abstract

A Novel Passive Offline LED Driver With Long Lifetime

Cited by 166 publications

References 17 publications

A Single-Stage LED Tube Lamp Driver with Power-Factor Corrections and Soft Switching for Energy-Saving Indoor Lighting Applications

A Single-Stage LED Tube Lamp Driver with Power-Factor Corrections and Soft Switching for Energy-Saving Indoor Lighting Applications

Long-Lasting and Highly Efficient TRIAC Dimming LED Driver with a Variable Switched Capacitor

LED Driver with TRIAC Dimming Control by Variable Switched Capacitance for Power Regulation

Contact Info

Product

Resources

About