Single-Stage AC/DC Single-Inductor Multiple-Output LED Drivers

Guo, Yue; Li, Sinan; Lee, Albert Ting Leung; Tan, Siew‐Chong; Lee, Chi Kwan; Hui, S. Y. Ron

doi:10.1109/tpel.2015.2496247

Cited by 68 publications

(31 citation statements)

References 33 publications

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“…12. The circuit parameters can be chosen based on the design principle described in [13] and they are listed in Table II. The entire control part of the SIMO LED driver (MUX, the channel selection logic, PI compensators, = and the proposed string-level and system-level dimming techniques) is implemented with a TMS320F28069 Piccolo microcontroller.…”

Section: B Coordinated Low-frequency and Time-sharing Dimming Technimentioning

confidence: 99%

“…To achieve these advantageous features, a single-stage non-isolated LED driver with AC input and multiple DC outputs has been devised [13]. The LED driver involves a single-inductor-multiple-output (SIMO) structure ( Fig.…”

Section: Introductionmentioning

confidence: 99%

“…This can be realized by operating the driver in discontinuous conduction mode and by employing a time-multiplexing control scheme. In this way, the power channels will be enabled in a nonoverlapping fashion without cross-interference [13]- [16]. Schematic diagrams of (a) an AC-powered single-inductor-multiple-output LED driver [18] and (b) its electrical equivalent.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, the output current is very sensitive to the control signal which may be difficult to control. The power efficiency of analog dimming decreases as the dimming ratio becomes very small [13]. In comparison, the PWM dimming approach can achieve accurate and full-range dimming relatively easily because the average output current of the driver is a linear function of the dimming ratio.…”

Section: Introductionmentioning

confidence: 99%

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An Off-line Single-Inductor Multiple-Output LED Driver With High Dimming Precision and Full Dimming Range

Guo

Tan

et al. 2017

IEEE Trans. Power Electron.

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Abstract-This paper presents a single-inductor multiple-outputs (SIMO) LED driver with precise dimming and full dimming range. Based on the coordination of a string-level and a system-level dimming schemes, the proposed SIMO LED driver can overcome practical constraints of existing SIMO LED drivers such as limited dimming range and needs for high-current switches. The proposal can achieve dimming precision up to an accuracy of 1% and also full dimming range. It has the flexibility of using either phase-shift or synchronous PWM switching for dimming control. The proposed circuit and control operations have been practically verified with a 25 W off-line SIMO driven LED system. Practical evaluations of its power quality and energy efficiency are also provided.I.

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Section: B Coordinated Low-frequency and Time-sharing Dimming Technimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Off-line Single-Inductor Multiple-Output LED Driver With High Dimming Precision and Full Dimming Range

Guo

Tan

et al. 2017

IEEE Trans. Power Electron.

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“…The results prove that the performance of the presented LED driver complies with the standards: IEC61000-3-2 and CIRSP 15:2009. Electronics 2020, 9, 52 2 of 22There are three types of LED driver systems: Single-stage [10,11], two-stage [12][13][14], and integrated LED drivers [15,16]. The single-stage LED driver is an AC/DC converter that provides a constant output current for the LED and a unity power factor.…”

mentioning

confidence: 99%

Design and Implementation of 150 W AC/DC LED Driver with Unity Power Factor, Low THD, and Dimming Capability

Tung¹,

Tuyen

Huy

et al. 2019

Electronics

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This paper presents the implementation of a two-stage light-emitting diode (LED) driver based on commercial integrated circuits (IC). The presented LED driver circuit topology, which is designed to drive a 150 W LED module, consists of two stages: AC-DC power factor correction (PFC) stage and DC/DC power converter stage. The implementation of the PFC stage uses IC NCP1608, which uses the critical conduction mode to guarantee a unity input power factor with a wide range of input voltages. The DC/DC power converter with soft-switching characteristics for the entire load range uses IC FLS2100XS. Furthermore, the design of an electromagnetic interference (EMI) filter for the LED driver and the dimming control circuit are discussed in detail. The hardware prototype, an LED lighting system, with a rated power of 150 W/32 V from a nominal 220 V/50 Hz AC voltage supply was tested to show the effectiveness of the design. The presented LED driver was tested for street lighting, and the experimental results show that the power factor (PF) was higher than 0.97, the total harmonics distortion (THD) was lower than 7%, and the efficiency was 91.7% at full load. The results prove that the performance of the presented LED driver complies with the standards: IEC61000-3-2 and CIRSP 15:2009. Electronics 2020, 9, 52 2 of 22There are three types of LED driver systems: Single-stage [10,11], two-stage [12][13][14], and integrated LED drivers [15,16]. The single-stage LED driver is an AC/DC converter that provides a constant output current for the LED and a unity power factor. The two-stage system consists of two separate stages, an AC/DC power factor correction (PFC) converter and a DC/DC converter. Recently, some integrated topologies were introduced in order to reduce the size and cost. Single-stage and integrated solutions have some advantages such as low-cost designs and high efficiency due to only one energy conversion. However, the PFC of these topologies causes a high-output voltage ripple due to the absence of electrolytic capacitors. Hence, the low-frequency current ripple makes LEDs flicker. These single-stage and integrated solutions are not suitable LED street lighting systems and are instead used for LED-based replacement lamps where small-size converters are needed. Furthermore, the bridgeless topologies usually generate high electromagnetic interference (EMI) due to large dv/dt and di/dt. The two-stage topology is the most popular topology for LED drivers above 100 W [17]. In the two-stage LED driver, the constant output current regulation is more easily implemented due to the bus voltage. Additionally, an isolated DC-DC stage is needed in the LED driver in order to ensure constant current control.Recently, there have been several commercial analog integrated circuits (ICs) available on the market that are recommended for a high power factor and low cost with a high efficiency. These commercial ICs fulfil the IEC 1000-3-2 Class C, but the total harmonics distortion (THD) is higher than 20% [18]. In reference [19], a reson...

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Single‐immittance‐network‐based inductive‐power‐transfer systems for driving multistring lighting‐emmiting diodes with current balance

Huang

2023

Circuit Theory & Apps

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Multistring arrays of LED in parallel connection are widely applied in lighting fields. Active control and passive methods are utilized to guarantee equal current sharing between different strings with a common voltage source. Compared with active control, the passive methods that adopt purely passive components without real power dissipation are good candidates. Currently, an inductive power transfer (IPT) converter providing a constant voltage (CV) line, followed by some immittance networks that convert the CV line to constant current (CC) outputs, is commonly used to drive multiple LED strings. However, in such a two-conversion-stage scheme, the component count is as many as 3 Â N, where N is the number of LED strings, which deviates from compact, low-cost, and simple design ideas. To address it, this paper aims to develop a single-immittance-network-based IPT system to drive multistring LEDs with the current balance. The proposed IPT system can directly provide a CV to CC conversion to drive multistring LEDs with the benefits of simplifying the circuit design, size, and cost. The proposed IPT system also features programmable luminous power, zero-phase-angle (ZPA) input, IPT technology, and load-independent-current (LIC) output. Detailed analysis, implementation, and experiment are presented in this paper.

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Single-Stage AC/DC Single-Inductor Multiple-Output LED Drivers

Cited by 68 publications

References 33 publications

An Off-line Single-Inductor Multiple-Output LED Driver With High Dimming Precision and Full Dimming Range

An Off-line Single-Inductor Multiple-Output LED Driver With High Dimming Precision and Full Dimming Range

Design and Implementation of 150 W AC/DC LED Driver with Unity Power Factor, Low THD, and Dimming Capability

Single‐immittance‐network‐based inductive‐power‐transfer systems for driving multistring lighting‐emmiting diodes with current balance

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