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Differential Remote Sense

PTQA430025, PTQA430033, PTQA420050

SLTS261A – MAY 2006 – REVISED DECEMBER 2006

The remote sense pins allows the converter to precisely regulate the DC output voltage at a remote location.

internal 10-

Ω resistor between each sense pin and its corresponding output prevents an excessive rise in the

output voltage. For practical reasons, the amount of IR voltage compensation should be limited to 0.5 V

maximum.

The remote sense feature is designed to compensate for limited amounts of IR voltage drop. It is not intended to

compensate for the forward drop of a non-linear or frequency dependent components that may be placed in

series with the converter output. Examples of such components include OR-ing diodes, filter inductors, ferrite

beads, and fuses. Enclosing these components with the remote sense connections effectively places them

inside the regulation control loop, which can affect the stability of the regulator.

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