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The RT9300 low-dropout bias supply for white LEDs is a high-performance alternative to the simple ballast resistors used in conventional white LED designs. The RT9300 uses an internal resistor to set the bias current for four LEDs, which are matched to 5%. The RT9300's advantages over ballast resistors include much lower bias variation with supply voltage variation, significantly lower dropout voltage, and in some applications, significantly improved efficiency. The RT9300 requires only a 60/45mV dropout voltage at a 20/15mA load on each output to match the LED brightness.
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<div class="spec-list"><ul class="lv1"><li>Low 60/45mV Dropout at 20/15mA </li><li>5% LED Current Matching </li><li>Simple LED Brightness Control </li><li>2.5V to 5.5V Supply Voltage Range </li><li>Thermal Shutdown Protection </li><li>RoHS Compliant and 100% Lead (Pb)-Free </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>Next-Generation Wireless Handsets </li><li>PDAs, Palmtops, and Handy Terminals </li><li>Digital Cameras, Camcorders </li><li>Battery-Powered Equipment </li></ul></div>
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