Optimal Design of LED Array for Single-Loop CCM Buck–Boost LED Driver

Lin, Ray-Lee; Chang, Yi-Chun; Lee, Chia-Chun

doi:10.1109/tia.2013.2243091

Cited by 50 publications

(25 citation statements)

References 10 publications

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“…[54][55][56][57][58] The possibility of minimization of the switching and conduction losses by increasing the switching frequency is the main advantage of switching-mode converters. [54][55][56][57][58] The possibility of minimization of the switching and conduction losses by increasing the switching frequency is the main advantage of switching-mode converters.…”

Section: Comparison Of Nonisolated Dc/dc Converters For Battery-chamentioning

confidence: 99%

“…It is seen that only Ćuk converter can maintain current of both input and output nodes continuous (with a small ripple, depending on the size of L in and L out ). 54,55 The inductors L 1 and L 2 are used to convert the input and output voltage sources into current sources. Moreover, maximum current of PV systems, fuel cells, or batteries is restricted because of limits of generating power.…”

Section: Comparison Of Nonisolated Dc/dc Converters For Battery-chamentioning

confidence: 99%

“…In recent years, DC/DC converters for battery-charging systems have attracted a great deal of attention in many researches. [54][55][56][57][58] The possibility of minimization of the switching and conduction losses by increasing the switching frequency is the main advantage of switching-mode converters. The selection of an appropriate power converter for DC/DC conversion has a serious impact on an optimal operation of the PV-pumping systems.…”

Section: Comparison Of Nonisolated Dc/dc Converters For Battery-chamentioning

confidence: 99%

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Application of DC/DC Ćuk converter as a soft starter for battery chargers based on double‐loop control strategy

Goudarzian

Khosravi

2019

Circuit Theory & Apps

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utilization of a transformer and passive snubbers in isolated converters increases the losses, volume, and cost. The second category is nonisolated converters, which are used for low or medium power levels. These have simple structure, low weight and high efficiency. Most of nonisolated converters are obtained by development of the boost and buckboost topologies. 7,8 It should be noticed that the boost and buck-boost converters are an unsuitable choice for DC/DC energy conversion, because of the pulsating output current. 9 Furthermore, the single-ended primary-inductor converter (SEPIC) normally presents an unbalanced output current. This deteriorated current may be undesirable for electronic systems. To overcome this drawback, Zeta converter has been introduced in many studies. 9-11 It produces a continuous output current. But, the input current of the Zeta converter is discontinuous, resulting in high losses and efficiency reduction. Hence, Ćuk converter has been proposed for industrial applications such as photovoltaic plants, 12 wind energy, 13 electrical vehicles, 14 compressor, 15 and fuel cell systems. 16 This converter can operate in a wide range of the output voltage, input voltage, and load. 17 The first goal of this paper is to show that a Ćuk converter can be well employed in battery charger applications as a soft starter to prevent the system from large current oscillations.So far, many researches have been focused on modelling and control of DC/DC converters. Small signal analysis of power converters is performed in a previous study 18 by considering the effects of parametric resistances and double-loop proportional-integral (PI) controller based on classical methods is proposed in another study. 19 Generally, traditional proportional-integral-derivative (PID)-type or PI-type controllers are common control methods in industrial systems, because of the unsophisticated design, simple control scheme, and effortless implementation. 20,21 The design theory of classical controllers is based on local linearization of the plant model to predict the system response in the frequency domain. However, these are inappropriate for large-signal models, which are subjected to significant variations. Also, it is necessary that the gains of classical methods is repeatedly adjusted to guarantee a favorable performance, because of the changes of controlled system parameters and the effects of uncertainties. In an existing work, 22 an automatic procedure is applied for optimal design of PI and PID controllers. Although this strategy brings more flexibility in design and provides a better response, the proposed control scheme looks to be more complicated as compared with nonadaptive design methods. Contrary to the aforementioned traditional approaches, some nonlinear control techniques have been offered for DC/DC converters in last decades. In the other research, 23 a particular linearized method around the equilibrium point of power converters is utilized to estimate the complete nonlinear system. Moreover, the analogue...

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Section: Comparison Of Nonisolated Dc/dc Converters For Battery-chamentioning

confidence: 99%

Section: Comparison Of Nonisolated Dc/dc Converters For Battery-chamentioning

confidence: 99%

Section: Comparison Of Nonisolated Dc/dc Converters For Battery-chamentioning

confidence: 99%

See 1 more Smart Citation

Application of DC/DC Ćuk converter as a soft starter for battery chargers based on double‐loop control strategy

Goudarzian

Khosravi

2019

Circuit Theory & Apps

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“…To modify the variable lighting characteristics, multi LEDs can be composed as a series array or parallel string. For the design of an LED converter, consideration of LED forward voltage variation (±5%~10%) is required [3][4][5][6][7][8]. Figure 1 shows a simplified LED driving circuit with a multi-string structure.…”

Section: Introductionmentioning

confidence: 99%

Design of an LLC Resonant Converter for Driving Multiple LED Lights Using Current Balancing of Capacitor and Transformer

Han

Lim

2015

Energies

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Abstract:In this study, to achieve the constant current drive and brightness control without a separate pulse width modulation (PWM) converter, a single converter is designed and verified by experiment under the condition of a multiple LED light load with different output voltage (Vf) characteristics. In the case of the input of 140 Watt class level, the proposed converter can drive two voltage type 95 Vdc (300 mA) light emitting diode (LED) lights loads and 120 Vdc (300 mA) LED lights loads simultaneously. In addition, to improve commercial compatibility, the proposed converter is operated in a wide range of the input voltage 90~264 Vac; also, the Power Factor Correction (PFC) circuit with the input power factor of more than 0.9 is added. In order to maximize the power conversion efficiency, a LLC resonant converter is applied to the PFC block with the output voltage of 380 Vdc and to a DC-DC conversion block. Finally, reliability of the proposed converter is verified through total harmonic distortion (THD) and electromagnetic interference (EMI) tests.

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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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Optimal Design of LED Array for Single-Loop CCM Buck–Boost LED Driver

Cited by 50 publications

References 10 publications

Application of DC/DC Ćuk converter as a soft starter for battery chargers based on double‐loop control strategy

Application of DC/DC Ćuk converter as a soft starter for battery chargers based on double‐loop control strategy

Design of an LLC Resonant Converter for Driving Multiple LED Lights Using Current Balancing of Capacitor and Transformer

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

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