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RT4533 Datasheet(PDF) 10 Page - Richtek Technology Corporation |
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RT4533 Datasheet(HTML) 10 Page - Richtek Technology Corporation |
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10 / 11 page  10 RT4533/A www.richtek.com DS4533/A-02 September 2015 © Copyright 2015 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Figure 2. PCB Layout Guide RSET VIN GND WLEDs The inductor should be placed as close as possible to the switch pin to minimize the noise coupling into other circuits. LX node copper area should be minimized for reducing EMI. FB node copper area should be minimized and keep far away from noise sources (LX pin) and RS should be as close as possible to FB pin. CIN should be placed as closed as possible to VIN pin for good filtering. The COUT should be connected directly from the output schottky diode to ground rather than across the WLEDs 4 2 3 5 6 1 VIN VOUT EN LX GND FB L D CIN COUT It recommended to add 100 Ohm between IC's VOUT and WLED's anode for improving system ESD level. |
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