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The RT9300A/B low-dropout bias supply for white LEDs is a high-performance alternative to the simple ballast resistors used in conventional white LED designs. The RT9300A/B uses an internal resistor to set the bias current for four LEDs, which are matched to 5%. The RT9300A/B'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 RT9300A/B requires only a 60/45mV dropout voltage at a 20/15mA load on each output to match the LED brightness.
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  • 20/15mA 输出时的电压降仅 60/45mV
  • 5% 的 LED 电流一致性
  • 极简单的 LED 电流控制方法
  • 供电电压范围为 2.5V~5.5V
  • 过热关机保护
  • 符合 RoHS 规范，不含卤素
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Next-Generation Wireless Handsets PDAs, Palmtops, and Handy Terminals Digital Cameras, Camcorders Battery-Powered Equipment
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