ST1S14 datasheet(33/46 Pages) STMICROELECTRONICS

Part #	ST1S14

Description	Power good open collector output

PDF	46 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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DocID17977 Rev 2

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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.

ST1S14 Datasheet(PDF) 33 Page - STMicroelectronics