TPS2419

TPS2419 www.ti.com SLVS998B – FEBRUARY 2010 – REVISED SEPTEMBER 2011 N+1 and ORing Power Rail Controller with Enable Check for Samples: TPS2419 FEATURES 1 Control External FET for N+1 and ORing Controls Buses From 3 V to 16.5 V External Enable N-Channel MOSFETControl Rapid Device Turnoff Protects Bus Integrity Programmable Turn-Off Threshold Soft Turn on Reduces Bus Transients Industrial Temperature Range: –40°C to 85°C 8-Pin TSSOP and SOIC Packages APPLICATIONS N+1 Power Supplies Server Blades Telecom Systems High Availability Power Modules DESCRIPTION The TPS2419 controller, in conjunction with an external N-channel MOSFET, provides the reverse current protection of an ORing diode with the efficiency of a MOSFET. The TPS2419 can be used to combine multiple power supplies to a common bus in an N+1 configuration, or to combine redundant input power buses. Applications for the TPS2419 include a wide range of systems including servers and telecom. These applications often have either N+1 redundant power supplies, redundant power buses, or both. Redundant power sources must have the equivalent of a diode OR to prevent reverse current during faults and hotplug. Accurate voltage sensing and a programmable turn-off threshold allows operation to be tailored for a wide range of implementations and bus characteristics. The TPS2419 brings out an enable pin which allows the system to force the MOSFET off under light-load, high noise conditions. Voltage Sou...