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http://dx.doi.org/10.17661/jkiiect.2021.14.4.275

A study on AC-powered LED driver IC  

Jeon, Eui-Seok (SEMIGEN CO., LTD)
An, Ho-Myoung (Department of Electronics, Osan University)
Kim, Byungcheul (Department of Convergence Electronic Engineering, Gyeongsang National University)
Publication Information
The Journal of Korea Institute of Information, Electronics, and Communication Technology / v.14, no.4, 2021 , pp. 275-283 More about this Journal
Abstract
In this study, a driver IC for an AC-powered LED that can be manufactured with a low voltage semiconductor process is designed and the performances of the driver IC were simulated. In order to manufacture a driver IC that operates directly at AC 220V, a semiconductor manufacturing process that satisfies a breakdown voltage of 500V or higher is required. A semiconductor manufacturing process for a high-voltage device requires a much higher manufacturing cost than a general semiconductor process for a low-voltage device. Therefore, the LED driver IC is designed in series so that it can be manufactured with semiconductor process technology that implements a low-voltage device. This makes it possible to divide and apply the voltage to each LED block even if the input voltage is high. The LED lighting circuit shows a power factor of 96% at 220V. In the pnp transistor circuit, a very high power factor of 99.7% can be obtained, and it shows a very stable operation regardless of the fluctuation of the input voltage.
Keywords
AC(alternating current)-LED; Driver IC; Series circuit; Power factor; pnp transistor;
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Times Cited By KSCI : 1  (Citation Analysis)
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