Primary side feedforward control for TRIAC dimmable light emitting diode driver with Constant Power

Zhang, Junming; Jiang, Ting; Zeng, Hongjuan; Wu, Xinke

doi:10.1049/iet-pel.2012.0300

Cited by 14 publications

(10 citation statements)

References 25 publications

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“…The control of silicon controlled dimmer control is controlled by STM32F407 microcontroller to realize the brightness adjustment of the incandescent lamp. Here using bidirectional thyristor BTA16 as switching device, its characteristic is to have three p-n junction four layer structure of high power semiconductor devices [17], bidirectional thyristor conduction at any point, only on the independent closed. It can be seen that whether or not the zero is accurate is crucial.…”

Section: Hardware Design Of Control Partmentioning

confidence: 99%

Development of Lighting Control System for Smart Hotel Rooms

Feng¹,

Yang²,

Shen³

et al. 2017

IJPE

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In order to realize the scientific management of the light environment and achieve the purpose of saving energy and increasing efficiency for the hotel, this paper designs and implements an intelligent lighting control system for the room, manual control and automatic control of dual management for the room lighting [6]. The system uses the multi-layer distributed structure, combining organically with the embedded technology, Internet of things technology, sensor technology, CAN bus technology and so on, and the embedded ARM microprocessor is the core of the system, combining with the intelligent gateway module, I/O weak current digital input and output module, dimming module, illuminance sensor module and power module, and communicating with each other by the CAN bus, to realize the intelligent management of the room lighting. The Lighting Control System for Smart Hotel Rooms is facing up to the high star hotel, to improve the management level and service quality of the hotel, and save energy, scientific and intelligent management, and enhance the competitiveness for the hotel, it will be an important part of the Smart Hotel System which has a certain application value [14]. As a new and most promising light source, all kinds of lighting have attracted more and more attention for their energy saving, environmental protection and other advantages.

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Section: Hardware Design Of Control Partmentioning

confidence: 99%

Development of Lighting Control System for Smart Hotel Rooms

Feng¹,

Yang²,

Shen³

et al. 2017

IJPE

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show abstract

“…As the core component of the LED lighting products, LED driver directly determines the performance, safety and life of LED lighting products. Therefore, the reliability, constant current precision, size, life and cost are necessary to be better integrated with the modern lighting fixture of low power LED drivers [1][2][3][4][5][6]. Based on the flyback converter, many primary-side regulation (PSR) schemes have been proposed for low-power LED drivers [7][8][9][10], which eliminate the opto-coupler and feedback network in the conventional secondary side regulation (SSR) schemes [11,12], obtaining the lower cost, lower standby power and higher power density.…”

Section: Introductionmentioning

confidence: 99%

Adaptive line voltage compensation scheme for a source‐driving controlled AC–DC LED driver

Chang

Jiang

Yang

et al. 2017

IET Circuits, Devices & Systems

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A primary-side controlled high-precision constant current AC-DC LED driver, based on source-driving control scheme, is designed for low-power LED-lighting applications in this study. The ratio between demagnetisation time T Demag and switching period T S and the primary peak current are remained constant by the proposed control IC, obtaining constant current output. Meanwhile, an adaptive line voltage compensation circuit, integrated in the primary peak current controller, is proposed based on source-driving control scheme. A compensation current proportional to line voltage is injected to the primary-side current sampling pin CS, thus making the turn-off bandgap reference of primary peak current under high-line voltage lower than that under low-line voltage. As a consequence, overshoot phenomena of primary peak current can be avoided, and the line regulation as well as the precision of output current can be improved. The proposed control IC has been fabricated in TSMC 0.35 μm 5 V/650 V CMOS/LDMOS process. Experimental results of a 5 W prototype show that the output current is kept stable at ∼250 mA, and the line regulation is within ±0.5% in a wide range of universal-input ac voltage from 85 to 264 V, and that >80% efficiency is obtained under heavy LED loads.

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“…Common methods used for LED dimming can be classified as AM (amplitude-mode modulation), pulse-width modulation (PWM) and multi-current level. AM approach involves using a voltage divider to regulate the LED current; this is referred to as amplitude-mode control [2][3][4][5][6][7][8][9] that also is used for voltage converter. However, the relationship between voltage and LED current is exponential; achieving linearity requires an additional correction technique.…”

Section: Introductionmentioning

confidence: 99%

Chip implementation of high‐efficient light‐emitting diode dimming driver for high‐power light‐emitting diode lighting system

Hsia¹,

Sheu²,

Lai³

2015

IET Power Electronics

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This study presents a novel high-power light-emitting diode (LED) driver based on chip-level design. We propose a multi-level current approach to LED dimming, rather than pulsed current. The LED driving current can be controlled directly using a digital interface, making it more user-friendly. An analysis of output impedance and driving current demonstrates how the driver can be realised on a single chip. A prototype chip was designed using the second generation TSMC 0.25 μm high-voltage technology. The chip area, including I/O pads and power driver, is only 0.89 mm 2 . The proposed chip is able to drive a 60 W LED panel at maximum output by regulating current in 16 steps for LED dimming. Measurement results indicate that driving efficiency reaches 96% and lighting efficiency is 20% higher than that achieved using pulsed-width modulation. Furthermore, the proposed chip is able to reduce interference, improve lighting efficiency, and prolong the lifespan of LED devices.

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Primary side feedforward control for TRIAC dimmable light emitting diode driver with Constant Power

Cited by 14 publications

References 25 publications

Development of Lighting Control System for Smart Hotel Rooms

Development of Lighting Control System for Smart Hotel Rooms

Adaptive line voltage compensation scheme for a source‐driving controlled AC–DC LED driver

Chip implementation of high‐efficient light‐emitting diode dimming driver for high‐power light‐emitting diode lighting system

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