High Current Led - Capacitive Drop Drive Application Note

Abstract. This application note describes the basics for powering high current light Emitting Diodes (LEDs) utilizing a capacitive divider circuit off the AC mains. A linear Regulator is used to control the LED current in order to ensure optimal performance and long life. LED characteristics are explained, followed by an example design to illustrate the concept. INTRODUCTION Light Emitting Diodes called LEDs have existed for many years. LEDs behave similarly to normal Diodes in that they have a forward voltage drop associated with the forward current. Early LEDs emitted radiation only in the infrared (IR) spectrum. Later, visible red LEDs emerged using various III−V compounds, such as aluminum gallium arsenide (AlGaAs). Other colors, such as yellow, amber and green came shortly thereafter. The breakthrough for more colors came with the blue LED; originally, this was silicon carbide. The applications for these early LEDs were largely limited to low power Displays because the output was limited
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High Current Led - Capacitive Drop Drive Application Note application circuits
High Current Led - Capacitive Drop Drive Application Note application circuits

High Current Led - Capacitive Drop Drive Application Note application circuits
High Current Led - Capacitive Drop Drive Application Note application circuits


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