Vicor Westcor PFC Mini Power Factor Corrected AC-DC Switcher - Manual (Page 27)

UG:115 vicorpower.com Applications Engineering: 800 927.9474 Page 27
Low Leakage Version (Available upon request)
If Low Leakage is required, Westcor has a PFC Mini model variant (must be requested).
This model enables the user to meet various additional specifications. The advantage
of the Low Leakage PFC Mini power supply is in multiple power supply systems that
have one AC input. This option will lower the input leakage current for these products
to 500 μA or less (may vary if Maxi, Mini, Micro series modules are used. Contact
Applications Engineering for more details.) An additional external EMI filter is typically
required.
How Low Leakage is Obtained
Low Leakage is obtained with the removal of the "Y" capacitors from within the EMI
filter of the PFC Mini
[a] . This reduces the leakage current from the AC input to AC
ground (chassis) to below 500 μA. At the same time, since the "Y" capacitors are a vital
component of the EMI filter, without them, the EMI will go up. When this happens, the
unit may no longer meet Westcor’s published specifications for conducted EMI. In order
to reduce the EMI to within an acceptable limit, an additional external EMI filter may be
required. All safety agency certifications for the PFC Mini remains intact
[g] .
Contact Applications Engineering for more information.
[g] Please note that the PFC Mini (including Low Leakage version) is NOT UL2601 compliant.
Low Output Ripple
If output ripple of 10 mV p-p or 0.15% (whichever is greater) is required, a PFC Mini
with RAM modules can be configured if the maximum output power per output
does not exceed 100 W. If this configuration is required, please contact:
apps@vicorpower . com to have it configured since this option is currently not
available using the online configuration tool (VSPOC).
If there are space restrictions, an external RAM/µRAM can also be used.
Office Environment Fan
A PFC Mini using an office environment fan is available. Please note that the maximum
output power for this version is 1,200 W. The maximum output power per slot is limited
to 500 W.
Molex Connector Limitation
Please note that those PFC Mini configurations that use Molex connectors are limited
to 9 A/pin (27 A per output). This is a Molex connector limitation, NOT a module power
limitation. Westcor’s online configuration tool (VSPOC) will not provide a PFC Mini
solution for requirements that exceed the 27 A limitation.