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ST1S14 データシート(PDF) 33 Page - STMicroelectronics |
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ST1S14 データシート(HTML) 33 Page - STMicroelectronics |
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33 / 46 page  DocID17977 Rev 2 33/46 ST1S14 Application information Figure 20. Short-circuit current VIN = 24 V (IL_PK = IFOLD) Figure 21 shows the operation of the constant current protection when a short-circuit is applied at the output at the maximum input voltage. According to Figure 20, the maximum inductor current escalates over the foldback current limitation. Figure 21. Short-circuit current VIN = 43 V (IL_PK > IFOLD) 7.4.3 Start up phase in short circuit condition The start up phase in short circuit condition rapresents a preparatory example to show the current protection strategy. Figure 25 shows the first switching pulses at power up when the switch current rises but is lower than the current protection level, called OCP1. As a consequence the switching frequency is not reduced. |
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