Electrolytic capacitor‐less reduced power processing single‐phase LED driver with power decoupling using split capacitor

Pallapati, Ramesh Babu; Chinthamalla, Ramulu

doi:10.1002/cta.3585

Cited by 8 publications

(2 citation statements)

References 29 publications

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“…Nowadays, with the rapid development of consumer electronics, LED lighting, electric vehicles, and AC-DC power converter systems with multiple outputs have been widely studied and applied. [1][2][3][4] To meet the input current harmonic limits standards, for example, IEEE STD 519 and IEC61000-3-2, the multiple-output AC-DC converter with power factor correction (PFC) function has become more and more popular. 5,6 Usually, a two-stage cascaded multiple-output converter, which is shown as Figure 1, is used to achieve high power factor (PF) and regulate output voltage or current of each output port.…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, with the rapid development of consumer electronics, LED lighting, electric vehicles, and AC‐DC power converter systems with multiple outputs have been widely studied and applied 1–4 . To meet the input current harmonic limits standards, for example, IEEE STD 519 and IEC61000‐3‐2, the multiple‐output AC‐DC converter with power factor correction (PFC) function has become more and more popular 5,6 …”

Section: Introductionmentioning

confidence: 99%

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Single‐stage triple‐output Cuk power factor correction converter

Yan,

Wen,

Xia

et al. 2023

Circuit Theory & Apps

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SummaryTraditional multiple‐output AC‐DC power supply with power factor correction (PFC) function usually employs a two‐stage cascaded topology that is composed of prestage PFC converter and N independent poststage DC‐DC converters to achieve PFC and voltage or current regulation of N outputs. Hence, the conventional two‐stage cascaded multiple‐output AC‐DC power supply needs N + 1 magnetic components as power inductors or transformers and N + 1 controllers, which increases the cost and size of the multioutput converters. The conventional multiple‐string AC‐DC LED driving circuits usually employ a two‐stage topology to realize PFC and independent current regulation of each LED string. To address the issue of complexity, high cost, and large size of the two‐stage multistring LED driving circuit, a single‐stage triple‐output Cuk PFC converter is proposed by cascading boost converter and single‐inductor triple‐output buck converter with sharing main power switch in this paper. The topology operation principle, control strategy, design consideration, and operation characteristics of the proposed circuit are investigated in detail. With the switch sharing and inductor multiplexing technologies at the same time, the proposed converter utilizes only single‐stage converter to achieve PFC function, independent regulation of triple‐channel output current, and flicker‐free with low twice line frequency LED current ripple. The proposed converter is verified by a 50‐W experimental prototype of LED driver for triple string LEDs. The proposed converter only uses two power inductors and a set of controller to achieve greater than 0.945 PF, up to 90.5% efficiency, low LED current ripple, and independent current regulation for triple LED strings with different forward voltage, which may significantly reduce the cost and size of the traditional AC‐DC multistring LED driving circuit.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Single‐stage triple‐output Cuk power factor correction converter

Yan,

Wen,

Xia

et al. 2023

Circuit Theory & Apps

View full text Add to dashboard Cite

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Half‐bridge secondary series resonant converter control for full voltage range

Kong,

Sun,

et al. 2024

Circuit Theory & Apps

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SummaryThis paper proposes a full‐range regulation method for half‐bridge secondary series resonant converter. With the proposed method, the resonant converter can achieve full‐range regulation within a narrow frequency range regardless of the load level. Besides, the converter can be used for the battery charger systems and programmable power supply systems. The primary‐side transistors and the secondary‐side diodes are zero‐voltage switching turned on and zero‐current switching turned off, respectively. In‐depth analysis reveals the characteristics, that is, operation principle, voltage conversion ratio, component stresses, and ZVS condition of the half‐bridge secondary series resonant converter with the proposed method. Besides, the performance comparisons among the different methods are conducted to present the merits of the proposed method. Further, the performance comparisons between the half‐bridge secondary series resonant converter and primary series resonant converter with the proposed method are executed to show their superiority with different turns ratio range of the transformer, respectively. When the turns ratio is larger than 0.5 and smaller than 1, the performance of the half‐bridge primary series resonant converter is better; when the turns ratio is equal to 1, the two configurations feature the same performance; while when the turns ratio is larger than 1, the half‐bridge secondary series resonant converter is preferable. The experimental results validate the theoretical analysis.

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