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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ACT8810 데이터시트(PDF) 52 Page - Active-Semi, Inc |
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ACT8810 데이터시트(HTML) 52 Page - Active-Semi, Inc |
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52 / 54 page  ActivePath TM CHARGER ACT8810 Rev 9, 15-Nov-12 Innovative Power TM - 52 - www.active-semi.com Copyright © 2012 Active-Semi, Inc. ActivePMU TM and ActivePathTM are trademarks of Active-Semi. I 2CTM is a trademark of NXP. FUNCTIONAL DESCRIPTION CONT’D Although the CHG_IN pin is designed for maximum robustness and an absolute maximum voltage rating of 14V for transients, attention must be given to bypass techniques to ensure safe operation. As a result, design of the CHG_IN bypass must take care to “de-Q” the filter. This can be accomplished by connecting a 1Ω resistor in series with a ceramic capacitor (as shown in Figure 17), or by using a tantalum or electrolytic capacitor to utilize it’s higher ESR to dampen the ringing. For additional protection in extreme situations, Zener diodes with 12V clamp voltages may also be used. In any case, it is always critical to evaluate voltage transients at the ACT8810 CHG_IN pin with an oscilloscope to ensure safe operation. Figure 17: CHG_IN Bypass Options for USB or Wall Adaptor Supplies |
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