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说明

特性

The LTC4287 is an integrated solution for hot swap applicationsthat allows a board to be safely inserted and removed from a livebackplane. The dual-gate drivers coupled with configurable multimodestartup sequencing and operation optimize the metal-oxidesemiconductor field-effect transistor (MOSFET) safe operating area(SOA) for a variety of power levels. The circuit breaker timer limitsthe MOSFET temperature for reliable protection against overstress.

The SMBus 3.1 interface, PMBus command structure, and onboardanalog-to-digital converters (ADCs) with selectable resolutionand speed allow monitoring of board current, voltage, power, energy,temperature, and fault status. An optional external, electricallyerasable programmable read only memory (EEPROM) can be usedfor part configuration and provide BlackBox capturing of past faultconditions.

The LTC4287 has additional features to respond to input undervoltagesand overvoltages, to interrupt the host when a fault has occurred,to notify when the output power is good, to detect insertionof a board, to turn off the MOSFET if an external supply monitorfails to indicate power-good within a timeout period, and to autoreboot after a programmable delay following a host commandedturn-off.

APPLICATIONS

• High availability server backplane systems
• 12 V/24 V/48 V/54 V distributed power systems
• Industrial

参数