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DM634 Datasheet(PDF) 5 Page - Silicon Touch Technology Inc. |
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DM634 Datasheet(HTML) 5 Page - Silicon Touch Technology Inc. |
5 / 25 page 點晶科技股份有限公司 SILICON TOUCH TECHNOLOGY INC . 新竹市科學園區展業一路9號7樓之1 9-7F-1, Prosperity RoadⅠ, Hsin-Chu, Taiwan, R.O.C. Tel:886-3-5645656 Fax:886-3-5645626 16-channel 16-bit PWM Constant Current LED Driver Version : A.003 Page 4 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. DM634 Equivalent Circuit of Inputs and Outputs 1. DCK, DAI, LAT , SOMODE/GCK terminals 2. DAO terminals PCB Layout Consideration To connect an external resistor to REXT pin and ground can determine the maximum output current. If there is any disturbance occurred to REXT pin, the constant current output may be unstable or noisy. Since REXT (pin23), DAO (pin22), and SOMODE/GCK (pin21) are next to each other, the most possible interference is caused by DAO or SOMODE/GCK signal. Accordingly, it is recommended that adding some shielding area within the above pins in PCB layout, or laying the signal line of above pins on different PCB layer will prevent the noise problems effectively. |
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