Design of an LED Sink Driver Using a Switched-Inductor and Switched-Capacitor Buck-Boost Converter with High Voltage Gains

Eguchi, Koichi; Shibata, Akira; Asadi, Farzin; Ishibashi, Toshiyuki; Harada, Yujiro; Oota, Ichirou

doi:10.1109/spies48661.2020.9243052

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…The Kalman-Yakubovich-Popov (KYP) lemma stability criterion develops a limited frequency KYP lemma for singular fractional systems (SFOSS), derives a bounded real lemma in the L∞-norm, and creates a controller to improve the L∞ performance index of SFOSS within certain frequency ranges [109]. Moreover, the KYP has been identified as one of the stability criteria to analyze nonlinear systems when applied to CPLs [110]. The system becomes stable when it satisfies the KYP stability criterion, as described in [111,112].…”

Section: Kalman-yakubovich-popov Lemma Stability Criterionmentioning

confidence: 99%

Control Strategies and Stabilization Techniques for DC/DC Converters Application in DC MGs: Challenges, Opportunities, and Prospects—A Review

Nduwamungu,

Lie,

Lestas

et al. 2024

Energies

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DC microgrids (DC MGs) offer advantages such as efficiency, control, cost, reliability, and size compared to AC MGs. However, they often operate with numerous constant power loads (CPLs), exhibiting a negative incremental impedance characteristic that can lead to instability. This instability weakens stability boundaries and reduces system damping, especially when dealing with pulsed power loads (PPLs) on electric aircraft, ships, and cars. Linear controllers may not ensure stability across various operations, causing voltage dips and potential system instability. To secure DC/DC converter functionality and comply with impedance specifications, it is crucial to consider minor loop gain in control strategies and stabilization techniques. Employing diverse methods to decrease minor loop gain in DC/DC converters is essential. A comprehensive evaluation, including strengths, weaknesses, opportunities, and threats (SWOT) analysis, is conducted to assess control strategies, stabilization techniques, and stability standards for different DC/DC converters, identifying SWOT.

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Section: Kalman-yakubovich-popov Lemma Stability Criterionmentioning

confidence: 99%

Control Strategies and Stabilization Techniques for DC/DC Converters Application in DC MGs: Challenges, Opportunities, and Prospects—A Review

Nduwamungu,

Lie,

Lestas

et al. 2024

Energies

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“…Thus, current drivers are ubiquitous. With the increase in performance requirements, namely, efficiency, current accuracy and dimmability, which are needed in many applications, an optimized current sink driver solution is vital [1][2][3][4]. Modern IC chips are rich with digital content favoring lower node processes [5,6].…”

Section: Introductionmentioning

confidence: 99%

A Design Methodology of High-Efficiency Dimmable Current Sink for Current-Regulated Drivers

2022

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This paper proposes a high-efficiency and dimmable current sink topology along with a design methodology for low node processes. The design methodology is demonstrated using a boost-based WLED driver application. In this work, the focus is on current regulation rather than voltage regulation. Therefore, the proposed topology exploits a smaller and faster NMOS pass device, replacing the conventional PMOS-based LDO arrangement. An amplifier-boosted pass-transistor current sink topology combined with a 5-bit programmable degenerated source resistor is being utilized for high-efficiency and brightness control. The realized WLED driver validates the proposed topology and the design methodology utilizing 40 nm CMOS TSMC technology. The design takes advantage of the programmability of the resistor to enhance the system’s power efficiency. This programmable resistor enables dimmability via current segmentation with a 1 mA step for a total of 25 mA. For a 500 mV voltage ripple at the DC-DC converter output driving 6 WLEDs with a 3.2 V forward voltage drop each, a worst-case current ripple of 200 µA and simulated efficiency of 97.6% is achieved for optimum pass-transistor size.

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Structure and Mixed Signal Front-End of White Organic Light Source for MEMS Sensor

Barylo

Boyko

Holyaka

et al. 2022

2022 IEEE XVIII International Conference on the Perspective Technologies and Methods in MEMS Design (MEMSTECH)

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Design of an LED Sink Driver Using a Switched-Inductor and Switched-Capacitor Buck-Boost Converter with High Voltage Gains

Cited by 5 publications

References 17 publications

Control Strategies and Stabilization Techniques for DC/DC Converters Application in DC MGs: Challenges, Opportunities, and Prospects—A Review

Control Strategies and Stabilization Techniques for DC/DC Converters Application in DC MGs: Challenges, Opportunities, and Prospects—A Review

A Design Methodology of High-Efficiency Dimmable Current Sink for Current-Regulated Drivers

Structure and Mixed Signal Front-End of White Organic Light Source for MEMS Sensor

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