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Demonstration/evaluation board for CAT3643/3644 quad-mode LED driver

Posted: 12 May 2008 ?? ?Print Version ?Bookmark and Share

Keywords:CAT3643/3644 application note? quad-mode LED driver? evaluation board?

This document by Denisa Stefan and Cornel Rotaru, applications engineers with Catalyst Semiconductor, describes the CAT3643/3644 demonstration/evaluation board for Catalyst's CAT3643/3644 quad-mode fractional LED driver. The functionality and major parameters of the CAT3643/3644 can be evaluated with the CAT3643(4)DB1 or CAT3643DB2 board. The CAT3643/3644 is a 3/4-channel charge pump that has been designed to drive with an ultrahigh-efficiency up to 3 or 4 LEDs connected in parallel. The CAT3643/3644 provides tightly matched regulated current through the LED outputs. The programmable current and dimming control of LEDs are achieved using a 1-wire digital interface. The maximum LED current is set by an external RSET resistor. The LED current dimming is available through 6 different levels by toggling the EN/DIM input. Detailed description and electrical characteristics are in the CAT3643 and CAT3644 data sheets.

View the PDF document for more information.





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