Academic Journal
Dynamic Output Resistance Optimization for Duty-cycle Control in Hybrid Capacitive LED Drivers
| العنوان: | Dynamic Output Resistance Optimization for Duty-cycle Control in Hybrid Capacitive LED Drivers |
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| المؤلفون: | Castellanos, Juan C., Turhan, Mert, Cantatore, Eugenio |
| المصدر: | Castellanos , J C , Turhan , M & Cantatore , E 2018 , Dynamic Output Resistance Optimization for Duty-cycle Control in Hybrid Capacitive LED Drivers . in 2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018 - Proceedings . , 8351545 , Institute of Electrical and Electronics Engineers , 2018 IEEE International Symposium on Circuits and Systems (ISCAS 2018) , Florence , Italy , 27/05/18 . https://doi.org/10.1109/ISCAS.2018.8351545 |
| بيانات النشر: | Institute of Electrical and Electronics Engineers |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Hybrid Switched Capacitor Converter, Integrated DC-DC converter, LED Driver |
| الوصف: | This paper proposes a technique to optimize dynamically the efficiency of hybrid switched capacitor converters, while changing their output voltage/current. Pulse width modulation can be used to change the output current in LED drivers based on hybrid converters. However, changes in duty-cycle cause a reduction in efficiency due to the increasing output resistance of the associated switched capacitor converter. The proposed solution re-configures dynamically the ratio among the flying capacitors and the size of the switches in the power train to minimize the output resistance in different duty-cycle ranges. Transistor level simulations, using 180nm CMOS technology, show the benefits of this technique in a 3:1 Dickson step-down hybrid capacitive LED driver using three duty-cycle optimization regions. A better efficiency and flatter output resistance over a variable conversion ratio was achieved with up to 8% efficiency improvement in this case study, without increasing the area occupied by power switches and flying capacitors. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| ردمك: | 978-1-5386-4881-0 1-5386-4881-4 |
| Relation: | urn:ISBN:9781538648810 |
| DOI: | 10.1109/ISCAS.2018.8351545 |
| الاتاحة: | https://research.tue.nl/en/publications/5cdd688d-78c6-4d0e-81be-e7269bac7722 https://doi.org/10.1109/ISCAS.2018.8351545 http://www.scopus.com/inward/record.url?scp=85057079852&partnerID=8YFLogxK |
| Rights: | info:eu-repo/semantics/closedAccess |
| رقم الانضمام: | edsbas.D0980225 |
| قاعدة البيانات: | BASE |
| ردمك: | 9781538648810 1538648814 |
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| DOI: | 10.1109/ISCAS.2018.8351545 |