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USB LED lighting tube

This project entails development of a power electronic controller for a LED lighting system as the low consumption lighting system. Many of today’s portable electronics require backlight LED-driver solutions with the following features: direct control of current, high efficiency, PWM dimming, overvo...

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Main Authors:	Hisaji, Noda, Mohd Rashid, Muhammad Ikram, Abdullah, R., Razali, Saifudin
Format:	Research Report
Language:	English
Published:	2019
Subjects:	TK Electrical engineering. Electronics Nuclear engineering
Online Access:	http://umpir.ump.edu.my/id/eprint/36352/1/USB%20LED%20lighting%20tube.wm.pdf http://umpir.ump.edu.my/id/eprint/36352/
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id	my.ump.umpir.36352
record_format	eprints
spelling	my.ump.umpir.363522023-02-17T08:20:56Z http://umpir.ump.edu.my/id/eprint/36352/ USB LED lighting tube Hisaji, Noda Mohd Rashid, Muhammad Ikram Abdullah, R. Razali, Saifudin TK Electrical engineering. Electronics Nuclear engineering This project entails development of a power electronic controller for a LED lighting system as the low consumption lighting system. Many of today’s portable electronics require backlight LED-driver solutions with the following features: direct control of current, high efficiency, PWM dimming, overvoltage protection, load disconnect, small size, and ease of use. This article discusses each of these features and how they are achieved, and conclude with a typical circuit that implements each of these features. Many portable LED applications require dimming. In applications such as LCD backlighting, dimming provides brightness and contrast adjustment. Two types of dimming are available: analog and PWM. With analog dimming, 50% brightness is achieved by applying 50% of the maximum current to the LED. Drawbacks to this method include LED color shift and the need for an analog control signal, which is not usually readily available. PWM dimming is achieved by applying full current to the LED at a reduced duty cycle. For 50% brightness, full current is applied at a 50% duty cycle. The frequency of the PWM signal must be above 100 Hz to ensure that the PWM pulsing is not visible to the human eye. The maximum PWM frequency depends upon the power-supply startup and response times. To provide the most flexibility and ease of integration, the LED driver should be able to accept PWM frequencies as high as 50 kHz. 2019 Research Report NonPeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/36352/1/USB%20LED%20lighting%20tube.wm.pdf Hisaji, Noda and Mohd Rashid, Muhammad Ikram and Abdullah, R. and Razali, Saifudin (2019) USB LED lighting tube. , [Research Report: Research Report] (Unpublished)
institution	Universiti Malaysia Pahang
building	UMP Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaysia Pahang
content_source	UMP Institutional Repository
url_provider	http://umpir.ump.edu.my/
language	English
topic	TK Electrical engineering. Electronics Nuclear engineering
spellingShingle	TK Electrical engineering. Electronics Nuclear engineering Hisaji, Noda Mohd Rashid, Muhammad Ikram Abdullah, R. Razali, Saifudin USB LED lighting tube
description	This project entails development of a power electronic controller for a LED lighting system as the low consumption lighting system. Many of today’s portable electronics require backlight LED-driver solutions with the following features: direct control of current, high efficiency, PWM dimming, overvoltage protection, load disconnect, small size, and ease of use. This article discusses each of these features and how they are achieved, and conclude with a typical circuit that implements each of these features. Many portable LED applications require dimming. In applications such as LCD backlighting, dimming provides brightness and contrast adjustment. Two types of dimming are available: analog and PWM. With analog dimming, 50% brightness is achieved by applying 50% of the maximum current to the LED. Drawbacks to this method include LED color shift and the need for an analog control signal, which is not usually readily available. PWM dimming is achieved by applying full current to the LED at a reduced duty cycle. For 50% brightness, full current is applied at a 50% duty cycle. The frequency of the PWM signal must be above 100 Hz to ensure that the PWM pulsing is not visible to the human eye. The maximum PWM frequency depends upon the power-supply startup and response times. To provide the most flexibility and ease of integration, the LED driver should be able to accept PWM frequencies as high as 50 kHz.
format	Research Report
author	Hisaji, Noda Mohd Rashid, Muhammad Ikram Abdullah, R. Razali, Saifudin
author_facet	Hisaji, Noda Mohd Rashid, Muhammad Ikram Abdullah, R. Razali, Saifudin
author_sort	Hisaji, Noda
title	USB LED lighting tube
title_short	USB LED lighting tube
title_full	USB LED lighting tube
title_fullStr	USB LED lighting tube
title_full_unstemmed	USB LED lighting tube
title_sort	usb led lighting tube
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/36352/1/USB%20LED%20lighting%20tube.wm.pdf http://umpir.ump.edu.my/id/eprint/36352/
_version_	1758578241637974016
score	13.211869

USB LED lighting tube

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