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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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CS2 датащи(PDF) 30 Page - fujitsu semiconductor |
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CS2 датащи(HTML) 30 Page - fujitsu semiconductor |
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30 / 56 page  30 MB39A214A Limitation : development tool vendor use only FUJITSU SEMICONDUCTOR CONFIDENTIAL DS405-00007-1v0-E The over current limit value is affected by ILIM pin source current and over current detection offset voltage in the IC except for the on resistance of the low-side FET and the inductor value. The variation of dropped over current limit value caused by IC characteristics is calculated by the following formula. 2 10-7 RLIM + 0.03 ΔILIM = RON_Sync ΔILIM : The variation of dropped over current limit value [A] RLIM : Over current limitation value setting resistor [Ω] RON_Sync : ON resistance of low-side FET [Ω] IO 0 ILIM ILIM’ The over current detection value needs to set a sufficient margin against the maximum load current. Inductor current Dropped over current limit value due to IC's characteristics Time Over current limit value ΔILIM |
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