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AN47

Zetex Semiconductors
Part Number AN47
Manufacturer Zetex Semiconductors
Description Getting more out of the ZXLD1350 - dimming techniques
Published Oct 7, 2007
Detailed Description www.DataSheet4U.com AN47 Getting more out of the ZXLD1350 - dimming techniques Ray Liu, Systems Engineer, Zetex Semicon...
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AN47
AN47


Overview
www.
DataSheet4U.
com AN47 Getting more out of the ZXLD1350 - dimming techniques Ray Liu, Systems Engineer, Zetex Semiconductors Introduction The ZXLD1350 has a versatile adjust pin that can be used in many ways to adjust the brightness of the LED by controlling the current in the LED.
This application note deals with some the ways in which dimming the LED can be achieved and discusses the merits of the techniques.
These dimming methods discussed include PWM dimming both with a low and high frequency signals, DC voltage control and resistive dimming.
Low frequency dimming Low frequency dimming is preferred for LED dimming since the LED instantaneous driving current is constant.
The color tem...



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