177920534 Datasheet, PDF (8/21 Pages) Wurth Elektronik GmbH & Co. KG, Germany. – Integrated capacitors and transformer

WPMIx9200501S / 1779205x4
MagI³C Power Module
FISM – Fixed Isolated SIP Module
DIELECTRIC STRENGTH TEST SETUP (HIGH POT TEST)
1
+VIN
2
-VIN
+VOUT ⁷
DC
DC
-VOUT ⁵
Sup ply
Connect all input – and output terminals together (see Figure) before connecting the supply voltage. When testing, set the
cut-off current to 1mA.
Parameters Supply Device: Current limit set to 1mA, Test voltage 4000Vdc, Test time 1sec.
REPEATED HIGH-VOLTAGE ISOLATION TESTING
A repeated high voltage test of a barrier component will degrade its isolation capabilities.
The primary and secondary windings within this transformer are enameled (coated) but do not possess additional isolation.
Typically, parts can withstand many times their stated test voltage and still perform optimally. The enamel coating can
degrade over time due to chemical reactions that occur at high voltages. We recommend keeping high voltage isolation
testing to a minimum to better protect the isolation between the windings. If repeated high voltage isolation testing is
required, consider reducing the voltage by a significant amount e.g. 20% from the test voltage stated within the datasheet.
These safety concerns are equally applicable to components that utilize functional isolation beyond wire enamel (i.e.
physical barriers or spacing).
we-online.com
Würth Elektronik eiSos GmbH & Co. KG – Data Sheet Rev. 1.0
©July 2016
8/21