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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RT8167A датащи(PDF) 39 Page - Richtek Technology Corporation |
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RT8167A датащи(HTML) 39 Page - Richtek Technology Corporation |
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39 / 40 page  RT8167A 39 DS8167A-00 January 2012 www.richtek.com © Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Keep the high current paths short, especially at the ground terminals. Keep the power traces and load connections short. This is essential for high efficiency. When trade-offs in trace lengths must be made, it's preferable to allow the inductor charging path to be made longer than the discharging path. Place the current sense component close to the controller. ISENxP and ISENxN connections for current limit and voltage positioning must be made using Kelvin sense connections to guarantee the current sense accuracy. The PCB trace from the sense nodes should be parallel to the controller. Route high-speed switching nodes away from sensitive analog areas (COMPx, FBx, ISENxP, ISENxN, etc...) Special attention should be paid in placing the DCR current sensing components. The DCR current sensing capacitor and resistors must be placed close to the controller. The capacitor connected to the ISEN1N/ISENAN for noise decoupling is optional and it should also be placed close to the ISEN1N/ISENAN pin. The NTC thermistor should be placed physically close to the inductor for better DCR thermal compensation. |
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