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PTH03020WAH Datasheet(PDF) 14 Page - Texas Instruments

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Part # PTH03020WAH
Description  22-A, 3.3-V Input Non-Isolated Wide-Output Adjust Power Module
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

PTH03020WAH Datasheet(HTML) 14 Page - Texas Instruments

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Application Notes
For technical support and further information visit http://power.ti.com
PTH Series of Wide-Output Adjust
Power Modules (3.3/5-V Input)
Remote Sense
The PTHxx060W, PTHxx010W, PTHxx020W, and
PTHxx030W products incorporate an output voltage
sense pin, Vo Sense. The Vo Sense pin should be connected
to Vout at the load circuit (see data sheet standard appli-
cation). A remote sense improves the load regulation
performance of the module by allowing it to compensate
for any ‘IR’ voltage drop between itself and the load. An
IR drop is caused by the high output current flowing
through the small amount of pin and trace resistance.
Use of the remote sense is optional. If not used, the
Vo Sense pin can be left open-circuit. An internal low-
value resistor (15-
Ω or less) is connected between the
Vo Sense and Vout. This ensures the output voltage remains
in regulation.
With the sense pin connected, the difference between
the voltage measured directly between the Vout 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 non-linear 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.


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