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CAT3648
4-Channel Ultra High
Efficiency LED Driver with
32 Dimming Levels
Description The CAT3648 is a high efficiency fractional charge pump that can
drive up to four 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 2.5 V to 5.5 V.
The EN/DIM logic input functions as a chip enable and a digital dimming interface for setting the current in all LED channels.
CAT3648 Datasheet
