Update: 29 September, 2023
The CAT3644 is a high efficiency Quad-Mode® 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 2.5V to 5.5V. The EN/DIM logic input functions as a chip enable and a digital dimming interface for
File format: PDF
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MD5 Checksum: 0D76193B74F34899261A5567D9F7E53A
Publication date: 03 May, 2012
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PDF Link: CATALYST SEMICONDUCTOR CAT3644 Manual PDF