PTH12060LAH datasheet(23/29 Pages) TI

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Remote Sense

PTH12060W/L

SLTS217D–MAY 2003–REVISED OCTOBER 2005

Products with this feature incorporate an output voltage sense pin, VO Sense. A remote sense improves the load

regulation performance of the module by allowing it to compensate for any IR voltage drop between its output

and the load. An IR drop is caused by the high output current flowing through the small amount of pin and trace

resistance.

To use this feature simply connect the VO Sense pin to the VO node, close to the load circuit (see data sheet

standard application circuit). If a sense pin is left open-circuit, an internal low-value resistor (15-Ω or less)

connected between the pin and the output node, ensures the output remains in regulation.

With the sense pin connected, the difference between the voltage measured directly between the VO and GND

pins, and that measured from VO Sense to GND, is the amount of IR drop being compensated by the regulator.

This should be limited to a maximum of 0.3 V.

Note: The remote sense feature is not designed to compensate for the forward drop of nonlinear or

frequency dependent components that may be placed in series with the converter output. Examples include

OR-ing diodes, filter inductors, ferrite beads, and fuses. When these components are enclosed by the remote

sense connection, they are effectively placed inside the regulation control loop, which can adversely affect

the stability of the regulator.

PTH12060LAH 데이터시트(PDF) 23 Page - Texas Instruments