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PDF DM412 Data sheet ( Hoja de datos )
| Número de pieza | DM412 | |
| Descripción | 3-CHANNEL CONSTANT CURRENT LED DRIVERS | |
| Fabricantes | SILICON TOUCH TECHNOLOGY | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de DM412 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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DM412
www.DataSheet4U.com
Version : A.003
Issue Date : 2007/08/27
File Name : SP-DM412-A.003.doc
Total Pages: 35
3-CHANNEL CONSTANT CURRENT LED DRIVERS
WITH LED OPEN DETECTION
新竹市科學園區展業一路 9 號 7 樓之 1
SILICON TOUCH TECHNOLOGY INC.
9-7F-1, Prosperity Road I, Science Based Industrial Park,
Hsin-Chu, Taiwan 300, R.O.C.
Tel：886-3-5645656 Fax：886-3-5645626
1 page  
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
Equivalent Circuit of Inputs and Outputs
1. CKI, DAI, STI, SDO terminals
www.DataSheet4U.com
DM412
2. POL terminals
3. CKO, DAO, STO terminal
3-CHANNEL CONSTANT CURRENT LED DRIVERS
Version:A.003
未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
Page 4
5 Page 
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
www.DataSheet4U.com
DM412
Output Modulation Technique
In order to minimize the harmonic noise and increasing current accuracy, DM412 provides a
new LED drive technique of output modulation. It mixes traditional Pulse Width Modulation (PWM)
represented by MSB 8 bit (Bit[15:8]) with Bit Angle Modulation (BAM) represented by LSB 8 bit
(Bit[7:0]). The main benefit of BAM is to drive LED with an equivalent multiple frequencies in the
lower intensity of LED light output. Each bit of BAM binary code is effectively allocated a fixed
width of phase angles within a modulation cycle. The reference table shows the ratio defined by the
binary significance of each bit:
bit weighted width
7 256
6 128
5 64
4 32
3 16
28
14
01
The relationships between BAM and PWM in the time domain can be refer to the diagram (not to
scale) below:
3-CHANNEL CONSTANT CURRENT LED DRIVERS
Version:A.003
未經授權而逕予重製、複製、使用或公開本文件，行為人得被追究侵權之相關民刑事責任
Unauthorized reproduction, duplication, use or disclosure of this document will be deemed as infringement.
Page 10
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet DM412.PDF ] | |
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