High power factor, low voltage stress, LED driver without electrolytic capacitor

Ni, Jianjun; Zhang, Fanghua; Yu, Yijie; Gong, Chunying; Deng, Xiang

doi:10.1109/powereng.2011.6036462

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…Therefore, S1B drivers inevitably contain low-frequency output current ripple, and their required capacitance is similar to that of S1A. In general, a Capacitance/W value of 1 µF/W is a very common value for DC-link capacitors in such PFC converters [33], [34].…”

Section: ) Single-stage Driversmentioning

confidence: 99%

A survey, classification, and critical review of light-emitting diode drivers

Tan

Lee

et al. 2016

IEEE Trans. Power Electron.

220

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Based on a survey on over 1400 commercial LED drivers and a literature review, a range of LED driver topologies are classified according to their applications, power ratings, performance and their energy storage and regulatory requirements. Both passive and active LED drivers are included in the review and their advantages and disadvantages are discussed. This paper also presents an overall view on the technical and cost aspects of the LED technology, which is useful to both researchers and engineers in the lighting industry. Some general guidelines for selecting driver topologies are included to aid design engineers to make appropriate choices.

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Section: ) Single-stage Driversmentioning

confidence: 99%

A survey, classification, and critical review of light-emitting diode drivers

Tan

Lee

et al. 2016

IEEE Trans. Power Electron.

220

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“…If the output power is pulsating and close to the instantaneous input power, the less storage capacitance will be needed to balance the energy difference between input power and output power. In [9], LED is driven with pulsating current at twice the line frequency. However, when exposed under the pulsating lighting, the human visual system needs to adjust itself constantly to accommodate the environment, and it may aggravate eye burden and result in eyestrain [10].…”

Section: Introductionmentioning

confidence: 99%

A single-stage electrolytic capacitor-less AC/DC LED driver

Zhang

Jin

2014

2014 International Power Electronics and Application Conference and Exposition

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Traditional LED drivers generally use electrolytic capacitor as the storage element which will restrict the lifetime and power density of drivers. In this paper, an electrolytic capacitor-less LED driver which pluses an auxiliary winding in the transformer and an additional full-bridge circuit to Flyback converter is proposed. It not only eliminates the electrolytic capacitor to extend the lifetime, but also achieves high input power factor and almost constant output current for LED load. The operational principle, detailed design of the main circuit, and control strategy are presented in this paper. A prototype with 48V/0.7A output is constructed and tested to verify the effectiveness of the electrolytic capacitor-less LED driver. Keywords-LED driver; power factor correction; electrolytic capacitor-free; constant output current; the large voltage ripple across the capacitor

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