CAT3643 3-Channel Ultra High Efficiency LED Driver Description The CAT3643 is a high efficiency fractional charge pump that can drive up to three LEDs programmable by a one wire digital interface.
The inclusion of a 1.
33x fractional charge pump mode increases device efficiency by up to 10% over traditional 1.
5x charge pumps with no added external capacitors.
Low noise input ripple is achieved by operating at a constant switching frequency which allows the use of small external ceramic capacitors.
The multi−fractional charge pump supports a wide range of input voltages from 2.
4 V to 5.
5 V.
The EN/DIM logic input functions as a chip enable and a digital dimming interface for current setting o...

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