Ericsson RBS 2106 Hardware Reference Manual page 368

4(8)
4
The PSU AC consists of the following main units:
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 ,QSXW ILOWHU (0& ILOWHU
The incoming sine voltage first passes through an internal fuse and then the
input filter, where it is filtered to prevent unwanted signals from being radiated
from the PSU.
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The bridge rectifies the incoming AC.
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The boost converter draws a sinusoidal input current in phase with the input
voltage, enabling the power supply to have a high power factor and low
distribution on input current. The output from the boost converter is 400 V DC.
Function Description
AC
Bridge
Mains
Indi-
cators
Input filter (EMC filter)
Bridge
Boost converter
DC/DC converter
Output filter (EMC filter)
Control and supervision circuits
DC/DC
Boost
Control and Supervision
Opto
Interface
Control Alarm
DC
Output
P007804A