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Picor Corporation ?picorpower.com
QPI-8
Rev 1.5, Page 5 of 17
QPI-8
QUIETPOWER
?/DIV>
Attenuation Test Setups:
Figure 6 - Open-frame EMI test setup using the QPI-8-EVAL1 carrier board with 48V converter.
Figure 7 - Base-plate EMI test setup using the QPI-8-EVAL1 carrier board with 48V converter.
In Figures 6 and 7, C1 is the required 47uF capacitor (United
Chemi-Con EMVE101ARA470MKE0S or equivalent), C2 is a
converter input cap (value dependant on converter), and CY
caps are 4.7nF ceramic (Murata GRM31BR73A472KW01L or
equivalent).
Attenuation Plots:
Figure 8 - V48B12C250BN using base-plate Y capacitors
with a 162W load.
Figure 9 V48B3V3C150BN using base-plate Y capacitors
with a 141W load.
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