Operating from 2.4 to 5.5 V, the CAT3649, a six-channel, high-efficiency Quad-Mode LED has a total of four charge pump modes (1x, 1.33x, 1.5x, and 2x), rather than the customary three. The inclusion of a 1.33x mode increases its efficiency by up to 10% compared to traditional charge pump LED drivers using 1.5x operation. The device is suitable for smart phones and other consumer handheld applications.
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