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MP4690GSD Datasheet(PDF) 9 Page - Monolithic Power Systems |
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MP4690GSD Datasheet(HTML) 9 Page - Monolithic Power Systems |
9 / 11 page MP4690 – SMART BYPASS FOR LED OPEN PROTECTION MP4690 Rev. 1.0 www.MonolithicPower.com 9 7/7/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. Figure 5 PCB Layout The high current path (LED1 Anode, U1 Drain, U1 Source, LED1 Cathode) should be placed very close to the device with short, direct and wide trace. U1 should be placed as close as possible to the protected LED. LED Dimming MP4690 also work well with various brightness control methods for LEDs. The brightness of LEDs is best controlled by pulse width modulation (PWM) with the switching frequency typically between 100Hz and 1kHz. Dimming via DC current can cause unwanted color shifts. Either way, MP4690 will not interfere with the dimming strategy employed. |
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