1FEATURES

• 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.