iHP Manual 30 | P a g e
The iHP modules can be used in a redundant parallel system by connecting the outputs together via OR-ing
diodes. For good regulation the remote sense connections must be made after the OR-ing diode at the same
point on the busbar or load. The remote sense leads should be the same length for each power supply and a
twisted pair should be used for best noise immunity. The current share lines between the power supplies
should be connected as shown in Figure 2-10.
Figure 2-10 Blocking diode for use when connecting modules in parallel
An antiparallel diode should be connected across each module’s terminal to prevent sinking of current into
one module when it is OFF while the others are ON. The diode should be capable of carrying the maximum
current and the forward voltage (Vf) drop should be lower than what is in the table below.
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