B1005 Datasheet, PDF (3/3 Pages) Pulse A Technitrol Company – XDSL Splitter Filter Module

XDSL Splitter Filter Module
B8841 PNL SmartER series
Application
B88xxPNL splitter modules are designed so that pins P1
and P2 which are behind the first inductor, are accessible
for addition of an overvoltage protector (OVP) to protect
the remaining components of the filter (especially the
tip- ring capacitors) from excessive surge voltages. The
advantages of placing the OVP at pins P1, P2 rather
than in the front of the filter (pins 1, 2) are (a) for VDSL
applications the first inductor shields the high frequency
signals from the effect of the capacitance or capacitance
imbalance of the VOP and (b) the extra inductor between
primary and secondary protection circuits during surge
events. Application circuit A can be used to protect
against differential (transverse) surge; Application
circuit B protects against differential and common mode
(longitudinal) surges. Which of these is required will
depend on the details of the system such as ground
terminations during surge testing and the effect of other
protection devices in the system. Typically OVPs with
breakover voltages of 360V would be used but the value
can be chosen to suit the application. It’s recommended
that the breakover voltage should not exceed 500V in
order to guarantee protection of the filter components.
Application Circuit
For More Information
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Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may be
trademarks or registered trademarks of their respective owners. © Copyright, 2012. Pulse Electronics, Inc. All rights reserved.
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