Error Amplifier Design of Peak Current Controlled (PCC) Buck LED Driver

Kim, Marn-Go

doi:10.1109/tpel.2014.2304739

Cited by 14 publications

(3 citation statements)

References 21 publications

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“…Figure 3 presents in detail the aforementioned converter topology; the two converters are connected in series to perform the virtual electrical power consumption at the circuitry input-i.e., the Buck converter's side-and the electrical power recovery at the circuitry output-i.e., the Boost converter's side-having negligible actual power consumption. The virtual power consumption concept is imposed via the Pulse Width Modulation (PWM) control technique that has been selected to drive both Buck and Boost converters; more specifically, in the Buck converter case, the Peak Current Control switching strategy is selected [15][16][17], while in the Boost converter case Average Power Control technique is used [18][19][20]. This way, the appropriate switching pulses for each control strategy are applied to switches S Buck and S Boost .…”

Section: Power Converter Topologymentioning

confidence: 99%

Innovative Energy-Recovery Unit for the LED-Lighting System of Heavy-Duty Vehicles

et al. 2021

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In this work, the development of an energy recovery control unit to be incorporated in the light-emitting diodes (LEDs) lighting systems of heavy-duty vehicles is presented. This innovative industrial product adopts modern power electronics technology to improve existing trucks’ LED lighting system by eliminating the so far inevitable power consumption by the conventional central control unit of the majority of these vehicles, which is obligatory for the uninterruptable operation of their lighting system. The main idea of this innovative product is its capability to virtually increase the lighting system power consumption without actually consuming this amount of energy, thus facilitating the central control unit requirements regarding these vehicles in an energy-conscious way. Under this light, a mature power converter’s topology is employed to draw the proper amounts of power from the vehicle’s batteries supply, to the level that the central control unit recognizes, and return this energy back to the batteries. The tests results of the developed industrial product highlight the energy saving potential of the proposed energy recovery scheme, while the Life Cycle Cost Analysis (LCCA) results confirm its techno-economical and environmental profit for the truck applications under study.

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Section: Power Converter Topologymentioning

confidence: 99%

Innovative Energy-Recovery Unit for the LED-Lighting System of Heavy-Duty Vehicles

et al. 2021

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“…Nowadays, there are many applications that require step-down or step-up voltage conversion ratio in renewable energy conversion [1][2]. Buck converters are used in applications that need low voltage and high current [3][4] like batteries [3][4][5]. Due to the limitation of the regular buck converter with small duty ratio, the conventional buck converter is not suitable for high step-down voltage conversion.…”

Section: Introductionmentioning

confidence: 99%

EMI Reduction of a Soft-switched High Step-down Converter Using Passive Compensation Method

Yazdani

Ariyan

2018

2018 International Conference on Applied Electronics (AE)

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In this paper, an EMI reduction method is applied to a new high step-down converter which has a coupled inductor, a synchronous rectifier and method with an auxiliary soft-switching cell. The freewheeling diode is replaced with a synchronous rectifier (SR) and zero-voltage-transition (ZVT) condition is provided for the main and SR switches. The auxiliary switch acts under zero-current switching. To reduce conducted electromagnetic emissions, a passive method is utilized by adding another winding on the core of converter coupled inductor to compensate the common-mode noise current generated by the parasitic capacitor of the main switch. The operating modes and theoretical waveforms are presented and simulation results of a 100W -100 kHz converter are shown to verify the theoretical analysis. The conducted EMI predictions confirm the benefit of the passive compensation method.

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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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Error Amplifier Design of Peak Current Controlled (PCC) Buck LED Driver

Cited by 14 publications

References 21 publications

Innovative Energy-Recovery Unit for the LED-Lighting System of Heavy-Duty Vehicles

Innovative Energy-Recovery Unit for the LED-Lighting System of Heavy-Duty Vehicles

EMI Reduction of a Soft-switched High Step-down Converter Using Passive Compensation Method

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

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