Datasheet

Common Bus
Concept
EN
A
C
GND
GATE
Power Conversion Block
Input
Voltage
Power
Bus
Implementation
C
BYP
BYP
DC/DC
Converter
DC/DC
Converter
RSVD
EN
A
C
GND
GATE
LOAD
Implementation
BYP
A
C
GND
GATE
BUS1 BUS2
Backplane
Power Buses
C
BYP
C
BYP
BYP
Plug-In Unit
Common
Buses
Concept
Hotswap
DC/DC
Converter
EN
TPS2419
www.ti.com SLVS998B –FEBRUARY 2010–REVISED SEPTEMBER 2011
Figure 11. N+1 Power Supply Example
INPUT ORing – TYPICAL CONNECTION
Figure 12 shows how redundant buses may be ORed to a common point to achieve higher reliability. It is
possible to have both MOSFETs ON at once if the bus voltages are matched, or the combination of tolerance
and regulation causes both TPS2419 circuits to see a forward voltage. The ORing MOSFET will disconnect the
lower-voltage bus, protecting the remaining bus from potential overload by a fault.
Figure 12. Example ORing of Input Power Buses
Copyright © 2010–2011, Texas Instruments Incorporated 11
Product Folder Link(s): TPS2419