منابع مشابه
An Isolated Off-Line High Power Factor Electrolytic Capacitor-Less LED Driver with Pulsating Output Current
One of the most efficient lighting technology is based on light-emitting diodes (LEDs). Common LED drivers with AC-input (50-60Hz) usually require a bulk electrolytic capacitor to decrease low-frequency ripple in the output. However, the critical element that limits the lifespan of the LED driver is the electrolytic capacitor. An isolated off-line LED driver is proposed in this paper, in which ...
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In Real time development 32-bit CPU’s which are widely used satisfies high speed processing, but they need a platform which makes it to run systems steadily and speedily. Stability and security plays an important role in embedded field. Based on the price, architecture and security Linux is one platform which plays an important role in embedded applications .The new version kernel has more bene...
متن کاملLED Driver Lifetime and Reliability
While LEDs themselves are extremely reliable and have a long lifetime, are electronic LED drivers capable of providing the required current/voltage input to the LEDs over their whole lifetime? This paper aims to address the above question in general and for the Xitanium family of LED drivers developed by Philips Lighting specifically. It will describe some of the strategies which Philips applie...
متن کاملAnalysis and Design of the Integrated Double Buck-Boost Converter as a High-Power-Factor Driver for Power-LED Lamps
The IDBB converter features just one controlled switch and two inductors and is able to supply a solid-state lamp from the mains providing high power factor and good efficiency. And with a careful design of the converter the filter capacitances can be made small enough so that film capacitors may be used. Thus the converter mean time between failures can be made as high as that of the solid-sta...
متن کاملCommercial Driver Medical Examinations
Objective: The objective of this study was to assess relationships between body mass index (BMI) and comorbid conditions within a large sample of truck drivers. Methods: Commercial driver medical examination data from 88,246 commercial drivers between 2005 and 2012 were analyzed for associations between BMI, medical disorders, and driver certification. Results: Most drivers were obese (53.3%, B...
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ژورنال
عنوان ژورنال: IEEJ Transactions on Electronics, Information and Systems
سال: 1995
ISSN: 0385-4221,1348-8155
DOI: 10.1541/ieejeiss1987.115.1_165