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N+1 and ORing Power Rail Controller
The TPS2412/13 controller, in conjunction with an
external N-channel MOSFET, emulates the function · Controls Buses From 0.8 V to 16.5 V of a low forward voltage diode. The TPS2412/13 can
· Linear or On/Off Control Method be used to combine multiple power supplies to a
· Internal Charge Pump for N-Channel MOSFET common bus in an N+1 configuration, or to combine
· Rapid Device Turnoff Protects Bus Integrity rperdouvinddeasnat liinnepaurt tuprno-wonerconbtursoel sw. hilTehtehe TTPPSS22441123
· Positive Gate Control on Hot Insertion has an on/off control method.
· Soft Turn on Reduces Bus Transients Applications for the TPS2412/13 include a wide
· Industrial Temperature Range: –40°C to 85°C range of systems including servers and telecom.
· Industry-Standard 8-pin TSSOP Package 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 · N+1 Power Supplies faults and hotplug. A TPS2412/13 and N-channel
· Server Blades MOSFET provide this function with less power loss
· Telecom Systems than a schottky diode.
· High Availability Systems Accurate voltage sensing and a programmable
turn-off threshold allows operation to be tailored for a
wide range of implementations and bus
characteristics. The TPS2412/13 are lower pin count,
feature reduced versions of the TPS2410/11.
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