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

Hsia, Shih-Chang; Sheu, Ming‐Hwa; Lai, Sheng-Yueh

doi:10.1049/iet-pel.2013.0805

Cited by 14 publications

(10 citation statements)

References 21 publications

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“…7 shows the full diagram of the proposed chip. This chip includes four bits current dimming by using current mirrors, refer to [10]. The OPA2 is used to refine the driving current accuracy.…”

Section: Open Circuit Detection and Bypassmentioning

confidence: 99%

Single chip design for detection and recovery of series LED open/short fault tolerance circuit

Hsia

Ciou

2018

IET Power Electronics

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Light emitting diode (LED) lighting is widely used in current. However, lighting robustness is low in a series loop since the lighting shuts down as one LED fails. This study proposes a power chip for fault detection and isolation for enhancement of LED's fault-withstanding capability. The chip can automatically detect the failed LEDs and bypass them, and let others continue to work. The authors implemented four bypass loops using a power metal oxide semiconductor (MOS) on the single chip. This chip can drive 1 A with 4-bit current dimming, which includes four bypass power P-type MOSs, one power N-type MOS, schedule controller, level shifter and over voltage protection. The schedule controller with a state machine can quickly find which one LED fail and recover it soon. The prototyping chip was designed using TSMC 0.25 μm, which is the second generator highvoltage technology, and the resulting chip area with pads is only 1.3 × 1.7 mm 2. The chip had been successfully implemented and measured to drive and bypass four LED components or modules.

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Section: Open Circuit Detection and Bypassmentioning

confidence: 99%

Single chip design for detection and recovery of series LED open/short fault tolerance circuit

Hsia

Ciou

2018

IET Power Electronics

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“…Since LED is DC supplying component, a driver is required for LED lighting system [9]. Currently, LED drivers have two types : one is AC/DC driver [10][11][12][13][14][15][16][17][18][19] and the other is DC/DC driver [20][21][22][23][24][25]. For AC/DC converter, the main issue is for low harmonic distortion, high power factor correction (PFC) and high driving efficiency.…”

Section: Introductionmentioning

confidence: 99%

Cost-Effective LED Dimming Driver With Single Chip Design for Smart Lighting System

2020

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For smart lighting system, this paper presents a high-power (60V/1A) single-chip driver for LED dimming using TSMC high-voltage process. The main circuit included analog circuit, power driver and digital control circuit with mixing-mode design methodology. The proposed digital dimming controls LED brightness increasing or decreasing with only two switches. The switches can be controlled by the auto mode or manual mode for user selection. All digital control circuits are embedded to the chip. Because of without the need of microprocessor for LED dimming, this chip is cost-effective design that can save the components of interface. To keep high-stable LED lighting, the dimming techniques used current mode rather PWM (Pulse Width Modulation) to reduce flicker. The multi-level current approach used 16 steps for LED lighting control. The step resolution is 6.25% for smart lighting system. With variable constant current control, this approach can achieve better lighting efficiency, reduce noise radiation and prolong LED lifetime for smart lighting systems. The maximum driving efficiency of the proposed chip can achieve near 98% as driving for 60W LED dimming.

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“…Such ripple minimization methods were discussed in recent research articles The single‐stage LED driver has been examined for a long time, which comprises of a PFC stage and a dc‐dc converter by sharing dynamic control switches and control circuits . Among these single‐stage converters, series‐parallel resonant circuit (also known as LLC) is a broadly utilized topology for its delicate exchanging qualities.…”

Section: Introductionmentioning

confidence: 99%

Pulse width modulation converter for light‐emitting diode tube light applications

Harikrishna

Gunabalan

Kumar

2020

Int Trans Electr Energ Syst

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Summary This study presents the design of single‐stage driver for light‐emitting diode (LED) tube lamp with input current shaping for T8‐type fluorescent lamp replacements. An AC‐DC LED driver integrates a pulse width modulation converter for converting ac to dc with power factor (PF) correction and current regulation. The operational principles and design considerations are explained for T8‐type 18 W LED tube lamp with a grid input voltage of 230 V. The experimental results for the prototype driver show the lowest input current total harmonic distortion (14%) and highest circuit efficiency (98%) at a rated input voltage of 230 V. Both simulation and experimental results are discussed in detail. This LED driver is suitable for energy‐efficient indoor lighting and pathway street lighting applications. The input PF and current distortion are within the acceptable limits of International Electrotechnical Commission (IEC) standards.

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

Cited by 14 publications

References 21 publications

Single chip design for detection and recovery of series LED open/short fault tolerance circuit

Single chip design for detection and recovery of series LED open/short fault tolerance circuit

Cost-Effective LED Dimming Driver With Single Chip Design for Smart Lighting System

Pulse width modulation converter for light‐emitting diode tube light applications

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