Input Current Measurement
A current probe can be passed around either input lead connected to the VI BRICK AC
Front End Evaluation Board. Note that an input capacitor on the evaluation board is
downstream of this measurement point.
Enable (EN)
DANGER! HIGH VOLTAGE!
The EN pin can be used to disable the VI BRICK AC Front End module. Connecting EN
to the –IN-PFM pin will disable the module. This will also clear any latching output OVP
fault if one has occurred. Note that the EN pin is referenced to the primary (hazardous
voltage) side of the converter. Warning: The EN Pin, or the –IN PFM Pin must not be
connected to line or output of the VIBRICK AC Front End.
Efficiency Measurement
As the VI BRICK AC Front End module can deliver and consume large currents, the ef-
fect of the PCB must be considered when making an efficiency measurement. Be certain
to accurately measure the voltage using test points TP08 (LINE1) , TP14 (LINE2/NEU-
TRAL), TP18 (–OUT), and TP01 (+OUT). Using these test points will more closely repre-
sent the efficiency of the VI BRICK AC Front End module.
Hardware
The hardware kit provided with the evaluation board includes the following:
>
(10) #10 internal tooth lock washers
>
(10) #10-32 hex nuts
>
(10) #10 external tooth lock washers
>
(4) F-F standoffs
>
(10) #10-32 screws
>
(8) M3 x 5 mm screws
>
(4) Rubber feet
Ring lugs are also recommended for making output connections.
Thermals
For most lab environments a fan blowing across the evaluation board is recommended.
See VI BRICK Thermal Management Application Note at:
or contact Vicor Applications Engineering for assistance (800) 927-9474.
Ordering Information
The evaluation board is specified by replacing the “–00” suffix with “–CB” on the VI
BRICK AC Front End model number (FE175D480C033FP-CB).
The Power Behind Performance
12/2012
vicorpower.com
Applications Engineering: 800 735.6200
Rev 1.2
Page 6
VICOR [ VICOR CORPORATION ]
