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http://dx.doi.org/10.5573/ieie.2014.51.7.089

A Study on LED Light Dimming using Power Device  

Kim, Dong-Shik (Dept. of Electronic Engineering, Hoseo University)
Chai, Sang-Hoon (Dept. of Electronic Engineering, Hoseo University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.51, no.7, 2014 , pp. 89-95 More about this Journal
Abstract
An LED lighting which adjusted brightness according to the surround ambient implemented using PWM technology and power devices. To measure the brightness of surround ambient a CdS sensor was used. A control board for the generation of the PWM signal was made using a MCU and duty ratio was controlled according to light intensity of surround ambient of the system. To drive the LED lamps which require high-voltage and high-current power devices were used for switching the DC power supply. Measurement results show that the IGBT is excellent as only lineality but the PowerBJT is more good to consider to efficiency and cost.
Keywords
PWM; LED; Dimming; PowerMOSFET; IGBT; PowerBJT;
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