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LED Driver 

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What is LED

LED是利用電能直接轉化為光能的原理，在半導體內正負極 2

個端子施加電壓，當電流!，"電子#電$%&'(，)*

能+,-光的./01，23"用的45的67，3能89:

"光子能+;的光，?@A能接BCDEFG的光

，HIJKLMAN，3=>OP 400-780nm，在QRSTU

V為6WX光，YZ[U光\]U光 (UV)^

 

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LED Development

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Characteristics o LED

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!emperature Eect on LED "arameters

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LED #pplications

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$ac%li&ht #pplications

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'esistor Limitin& Linear 'e&ulation

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LED Drivin& Circuit

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Constant volta&e to Constant Current Conversion

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#vera&e Current an 'ipple Current

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"W, Dimmin& Control

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8-Channel LED $ac%li&ht Driver #rchitecture

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LED immin& control methos

.Current-,irror immin& (C, immin&)

2.!ransconuctance-#mpliier immin& (!# immin&)

/.$urst- ,oe immin& ($, immin&)

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C, architecture o circuit

Current-Mirror dimming circuit

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!# architecture o circuit

3)Transconductance-Amplifier dimming circuit

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$, architecture o circuit

4)Burst-Mode dimming  circuit

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"W, immin&

current-pulse duty cycle

current-pulse duty ratio VS. average current

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Current-pulse river 

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