A review and classification of LED ballasts

Li, Sinan; Tan, Siew‐Chong; Hui, S. Y. Ron; Tse, Chi K.

doi:10.1109/ecce.2013.6647106

Cited by 21 publications

(9 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The average input current can be given by (10), which indicates that the shape of the input current is affected by the ratio of Vdc and Vp. As Vdc approaches Vp, the output current becomes more distorted [17] .…”

Section: Input Current Analysis and Circuit Characteristicsmentioning

confidence: 99%

“…The electrolytic capacitor will not only increase the cost, but also require a number of printed circuit board spaces. The existing techniques include: (1) the input current waveform of the driving power is modulated, and the peak of the input pulse power is reduced by reducing the imbalance of the input and output power; (2) The difference between the input and output power of the large inductor and the larger size of the thin film capacitor is achieved, although the passive energy storage element is of great size and weight; (3) Increasing the ripple and the input current to the three and five harmonics, thereby achieving the purpose of removing the electrolytic capacitor [6][7][8][9][10] . These methods are to improve the existing control or power circuit, which can be divided into two categories: one is to retain the original topology, and the control method is improved; the other one is to construct a new circuit topology.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimized Constant Current and Ripple Control of Non-electrolytic Capacitor LED AC/DC Power

Li¹,

Chen²,

Li³

et al. 2017

dtetr

View full text Add to dashboard Cite

For the traditional power supply of the non-continuous load Boost-Buck LED, when it has a high power factor, it will produce a significant low frequency ripple current. In this paper, a new type of LED driver power supply technology based on buck boost topology is proposed. The advantage of this technique is that the low frequency ripple current is greatly reduced without affecting the performance of the power factor and the advantages of high efficiency and low cost of the traditional boost buck LED driver are also preserved. We validate the performance of this new technology through a 30W and 50V-2A experimental prototype.

show abstract

Section: Input Current Analysis and Circuit Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimized Constant Current and Ripple Control of Non-electrolytic Capacitor LED AC/DC Power

Li¹,

Chen²,

Li³

et al. 2017

dtetr

View full text Add to dashboard Cite

show abstract

“…Commercial / residential LED lamps should achieve high power factor [1] and harmonics of the input current should meet the IEC 61000-3-2 Class C standard [2]. LED drivers can be a single-stage switch-mode DC/DC converter(i.e., buck, buck-boost or flyback) [3] or a two-stage converter that consists of a front-end boost converter [4] for power factor correction (PFC) and step down voltage conversion circuit as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

Design and Development of Compact LED Driver For Long Life with PWM Dimming Functionality

Sreeram¹

2017

IJRASET

View full text Add to dashboard Cite

Solid state lighting like Light Emitting Diode (LED) lamps are eco-friendly, mercury-free, more energy efficient, able to ignite instantly and have longer lifetime, superior efficacy performance. Commercial / residential LED lamps should achieve high power factor greater than 0.9 according to Energy Star Criteria for Solid State Lighting Luminaries and harmonics of the input current should meet the IEC 61000-3-2 Class C standard. Large output capacitance is required at the output of the LED driver circuit to balance the energy difference between the input pulsating AC power and output DC power delivered to the LED load and minimize the low frequency LED output current ripple. There is a mismatch between the lifetime of electrolytic capacitors (5000 hours) and the LED (1,00,000 hours) that affects lifetime of overall LED system. A compact single-switch AC/DC high power factor electrolytic capacitor-less LED driver with integrated PFC circuit and step-down voltage conversion circuit is proposed here. Simulation and hardware models were developed on a 12-W LED lamp. A remote controlling technique is used to provide different dimming level function for even the non-dimmable LED lamps. The LED driver system also operates with high power factor of 0.95 in accordance with Energy Star Criteria for Solid State Lighting Luminaries and low Total Harmonic Distortion of 21% which is within the limits of IEC 61000-3-2 Class C standards.

show abstract

“…Harmonic content of the AC source current due to lighting loads such as the LED lamps should be within the IEC 6100032 Class C standards for residential or industrial lighting applications operating at 50Hz AC frequency [2]. In addition, the Energy Star Criteria for Solid State Lighting Luminaries states that the input line power factor of the LED lighting in commercial and residential lighting purposes should be higher than atleast 0.9 and 0.7 respectively [3].…”

Section: Introductionmentioning

confidence: 99%

“…Active power factor correction incorporated LED driver circuit [3] can be a single-stage switch-mode DC/DC converter (i.e., buck, buck-boost or flyback) or a dual-stage converter that consists of a front-end boost converter [4] for power factor correction (PFC) as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

A Single Switch Low Cost LED Driver with Wireless Dimming Controls

Sreeram¹,

Unnikrishnan²,

C³

2017

IJERT

View full text Add to dashboard Cite

In order to nullify the source and light output power and to minimize the low frequency LED current ripple, electrolytic capacitors are generally used for energy efficient residential, industrial and commercial lighting. The life of an electrolytic capacitor is at least 13 times less than that of an LED bulb which affects the life of the LED lamp. To increase the age of the LED lighting fixture, an offline LED driver that does away with electrolytic capacitors or intricate input current control techniques to reduce the low-frequency (i.e., 100 or 120 Hz) output ripple is presented here. The single switch circuit reduces the energy storage capacitance to a few microfarads range, so that reliable film capacitor can be used instead of unreliable electrolytic capacitor. Simulation and hardware results are given on a 8-W LED lamp to validate the novelty of the circuit. The remote controlling mechanism enables to automatically turn ON ,OFF and dim even the non dimmable LED lighting system. Moreover, the system is suitable for any industrial. commercial and industrial lighting applications. The LED driver system also operates with high power factor of 0.99 in accordance with Energy star criteria for Solid State Lighting Luminaries and low Total Harmonic Distortion of 20% which is within the limits of IEC 61000-3-2 Class C standards. There is no flickering as the switching occurs at high frequency.

show abstract

A review and classification of LED ballasts

Cited by 21 publications

References 37 publications

Optimized Constant Current and Ripple Control of Non-electrolytic Capacitor LED AC/DC Power

Optimized Constant Current and Ripple Control of Non-electrolytic Capacitor LED AC/DC Power

Design and Development of Compact LED Driver For Long Life with PWM Dimming Functionality

A Single Switch Low Cost LED Driver with Wireless Dimming Controls

Contact Info

Product

Resources

About