DatasheetsPDF.com

CAT3644

Catalyst Semiconductor
Part Number CAT3644
Manufacturer Catalyst Semiconductor
Description 4-Channel Ultra High Efficiency Quad-Mode TM LED Driver
Published Apr 18, 2007
Detailed Description CAT3644 4-Channel Ultra High Efficiency Quad-Mode™ LED Driver FEATURES „ High efficiency 1.33x charge pump „ Quad-mode ...
Datasheet PDF File CAT3644 PDF File

CAT3644
CAT3644

Overview
CAT3644 4-Channel Ultra High Efficiency Quad-Mode™ LED Driver FEATURES „ High efficiency 1.
33x charge pump „ Quad-mode charge pump: 1x, 1.
33x, 1.
5x, 2x „ Drives up to 4 LEDs at 25mA each „ 1-wire EZDim™ LED current programming „ Power efficiency up to 92% „ Low noise input ripple in all modes „ “Zero” current shutdown mode „ Soft start and current limiting „ Short circuit protection „ Thermal shutdown protection „ 3mm x 3mm, 16-lead TQFN package DESCRIPTION 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 tradi– tional 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 ...


Similar Datasheet


Since 2006. D4U Semicon,
Electronic Components Datasheet Search Site. (Privacy Policy & Contact)