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LA5724MC Datasheet(PDF) 4 Page - Sanyo Semicon Device |
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LA5724MC Datasheet(HTML) 4 Page - Sanyo Semicon Device |
4 / 6 page LA5724MC No.A2021-4/6 Protection Circuit Functional Descriptions Overcurrent protection function The overcurrent protection function detects, on a pulse-by-pulse basis, the output transistor current and turns off that output transistor current if it exceeds 0.7A in a pulse-by-pulse manner. Short circuit protection function This IC prevents the current from increasing when the outputs are shorted by setting the switching frequency to 30kHz if the VOS pin voltage falls below 0.8V. Note : At startup, since the switching frequency will be 30kHz while the VOS pin voltage is 0.8Vor lower, the current capacity is reduced. If the load is applied at startup and the applications has trouble starting, increase the value of the inductor to resolve this problem. Timing Chart Limit current Inductor current SWOUT voltage 0V 0.8V 1.23V 30kHz 160kHz VIN voltage SWOUT voltage VOS voltage |
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