LT4256-3CGN#PBF

LINEAR TECHNOLOGY  LT4256-3CGN#PBF  芯片, 热插拔控制器, 48V, 16SSOP

The is a positive high voltage Hot Swap Controller with open-circuit detect. It allows a board to be safely inserted and removed from a live backplane. An internal driver controls the high side N-channel MOSFET gate for supply voltages ranging from 10.8 to 80V. The part features an open-circuit detect OPEN output that indicates abnormally low load current conditions. The LT4256-3 also features an adjustable analog foldback current limit. If the supply remains in current limit for more than a programmable time, the N-channel MOSFET shuts off, the PWRGD output asserts low and the LT4256-3 either automatically restarts after a time-out delay or latches off until the UV pin is cycled low depending on the status of the RETRY pin. The PWRGD output indicates when the output voltage rises above a programmed level. An external resistor string from VCC provides programmable undervoltage and overvoltage protection.

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Allows safe board insertion and removal from a live backplane

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Foldback current limiting

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Open circuit and overcurrent fault detect

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Drives an external N-channel MOSFET

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Programmable supply voltage power-up rate

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Automatic retry or latched off operation after overcurrent fault

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Open MOSFET detection

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1% Over and Undervoltage Detection Accuracy