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CAT3637
6-Channel Programmable High Efficiency LED Driver
Description
The CAT3637 is a high efficiency fractional charge pump that can drive up to six LEDs programmable by a 1−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/SET logic input functions as a chip enable and a digital programming interface for setting the current in the LED channels.
CAT3637 Datasheet
