Cuk converter as a LED lamp driver

Mohamed, Latifah; Hamid, Nurul Farhana Abdul; Isa, Zainuddin Mat; Saudin, Norshafinash; Ramly, N. H.; Ahamad, Nor Baizura

doi:10.1109/pecon.2012.6450219

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…When compared with the classical LED driving topologies presented in [13][14][15][16][17][18], the proposed new family of power converters have the following advantages: First, the design can be used to reduce the cost and components. Since the LEDs are put in the diode, transistor, and inducer paths, the drivers can have less components.…”

Section: Discussionmentioning

confidence: 99%

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Circuit Topology Analysis for LED Lighting and its Formulation Development

2019

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Light emitted diode (LED) is becoming more popular in the illumination field, and the design of LED lighting is generally made to provide illumination at lower power usage, helping save energy. A power electronic converter is needed to provide the power conversion for these LEDs to meet high efficiency, reduce components, and have low voltage ripple magnitude. The power supply for LED is revisited in this paper. The LEDs connected in series with diode, transistor, or inductor paths are examined. The formulation for each of the cases is described, including the classical converters of buck, boost, buck–boost, and Ćuk. The circuit reductions of the classic circuit, circuit without the capacitor, and without a freewheeling diode are studied. Using LED to replace freewheeling diodes is proposed for circuit component reduction. General equations for different connection paths have been developed. The efficiency and output ripple amplitude of the proposed power converters are investigated. Analytical study shows that the efficiency of proposed circuits can be high and voltage ripple magnitude of proposed circuits can be low. The results show that the proposed circuit topologies can be easily adapted to design LED lighting, which can meet the criteria of high efficiency, minimum components, and low-voltage ripple magnitude at the same time.

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Section: Discussionmentioning

confidence: 99%

“…Therefore, switched mode drivers are suitable to drive LED lighting. Classical topologies including the buck [13], boost [14,15], buck-boost [16],Ćuk [17,18], and phase-shifted [19] can all be used as switched-mode drivers.…”

Section: Introductionmentioning

confidence: 99%

Circuit Topology Analysis for LED Lighting and its Formulation Development

2019

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“…At present, many topologies are used for dimming control, such as buck [5]- [8], boost [9], buck-boost-buck [10], flyback [11], buck-flyback-buck [3], half-bridge [12], Cuk [27], and resonant circuits [2], [13]- [17]. These topologies achieve one or more optimization goals, including high efficiency, wide dimming range, wide input voltage range, and costsaving, through their corresponding control strategies.…”

Section: Illumination Control and Visible Light Communication (Vlc)mentioning

confidence: 99%

Full-Range LED Dimming Driver With Ultrahigh Frequency PWM Shunt Dimming Control

Wang

Hou

et al. 2020

IEEE Access

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This paper explores an ultrahigh dimming frequency Light-Emitting Diode (LED) pulse width modulation (PWM) shunt dimming driver that achieves the full-range dimming. Firstly, the dimming frequency is improved to 20kHz for avoiding flicker and audible noise in high dimming requirements application, such as film and television shooting. Secondly, this paper reduces dimming ratio loss at ultrahigh dimming frequency by removing output capacitor. As a result, given 1% dimming ratio is achieved. Subsequently, for improving LED current square waveform at ultrahigh dimming frequency, it is necessary to suppress parasitic oscillation at the falling edge in LED current. Therefore, this paper proposes a method which connects a fast recovery diode with LED in series. In such way, parasitic oscillation at the falling edge in LED current is suppressed. Meanwhile, linear dimming performance is improved such as dimming linearity of low ratio and circuit reliability. Finally, a 120 W experimental prototype is built to drive an LED array comprising 9 LEDs in parallel and 15 LEDs in series. The switching frequency and dimming frequency of prototype are 500 kHz and 20 kHz, respectively. In addition, it achieves full dimming range of 1% to 99.99%. INDEX TERMS Output capacitance, PWM shunt dimming, ultrahigh dimming frequency, full-range dimming, parasitic parameters.

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