N+1 And OR-ing Power Rail Controller

The TPS2412 13 controller, in conjunction with an external N-Channel MOSFET emulates the function of a low forward voltage Diode The TPS2412 13 CAN be used to combine multiple power supplies to a common bus in an N+1 configuration, or to combine redundant input power buses. The TPS2412 provides a linear turn-on control while the TPS2413 has an on/off control method.
Applications for the TPS2412 13 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. A TPS2412 13 and N-Channel MOSFET provide this function with less power loss than a Schottky Diode
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.
By Texas Instruments