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ZXLD1370EST16TC датащи(PDF) 26 Page - Diodes Incorporated |
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ZXLD1370EST16TC датащи(HTML) 26 Page - Diodes Incorporated |
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26 / 40 page ![]() ZXLD1370 Document number: DS32165 Rev. 6 - 2 26 of 40 www.diodes.com December 2016 © Diodes Incorporated ZXLD1370 Application Information (Cont.) Input Capacitor The input capacitor can be calculated knowing the input voltage ripple VIN-PP as follows: Buck PP IN SW LED IN V x f I x ) D 1 ( x D C Use D = 0.5 as worst case Boost PP IN SW PP L IN V x f x 8 I C Buck-Boost PP IN SW LED IN V x f I x D C Use D = DMAX as worst case The minimum RMS current for the output capacitor is calculated as follows: Buck ) D 1 ( Dx x I I LED RMS CIN Use D = 0.5 as worst case Boost 12 I I PP L RMS CIN Buck-Boost ) D 1 ( D x I I LED RMS CIN Use D = DMAX as worst case |
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