177920524 Datasheet, PDF (16/21 Pages) Wurth Elektronik GmbH & Co. KG, Germany. – No minimum load required

WPMIx9200501S / 1779205x4
MagI³C Power Module
FISM – Fixed Isolated SIP Module
BLOCK DIAGRAM
1
+VIN
Power Module
C_in
1uF
Oscillator
4kV
2
-VIN
+VO UT
7
C_{ou t}
1uF
R_{bia s}
22k
5
-VO UT
CIRCUIT DESCRIPTION
The MagI³C Power Modules 1779205x4 are based on a push – pull converter with integrated Transistors, rectifying diodes,
isolated transformer, input and output capacitors. The modules are unregulated.
Since there is no feedback path from the output to the input, the duty cycle is fixed to 50%. The duty cycle is independent
from the load (zero load to full load). The output voltage is basically defined by the turns ratio of the transformer.
PROTECTIVE FEATURES
Due to the structure of the Power Module following protective feature are NOT implemented:
• Over temperature protection (OTP)
• Over current protection (OCP)
• Output overvoltage protection (OVP)
• Input overvoltage protection
• Short circuit protection (SCP)
• Input reverse polarity protection
Note: To protect the source and the MagI³C Power Module in abnormal conditions (secondary side overload or short circuit)
a primary side input fuse of max. 1A (slow blow) is recommended.
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©July 2016
Würth Elektronik eiSos GmbH & Co. KG – Data Sheet Rev. 1.0
16/21