Figure 3
BCM® evaluation:
paralleling connections of two
BCM evaluation boards
+IN
–IN
+OUT
–OUT
Input Current Measurement
A current probe can be passed around the +IN lead connected to the BCM. Input capacitors on the
evaluation board are downstream of this measurement point.
TM: Do not connect, for factory use only.
VC: Do not connect, for factory use only.
Primary Control (PC)
The PC can be used to disable the BCM, monitor status or provide a primary-referenced bias supply.
a. Connecting PC to the –IN will disable the BCM.
b. Connecting a DVM or oscilloscope between PC (positive) and –IN (negative) will indicate the
status of the BCM. Please note that the BCM does not have active current-sinking capability.
c. Connecting a load between PC (positive) and –IN (negative) will provide a
primary-referenced bias supply.
Efficiency Measurement
As the BCM can deliver and consume large currents, the effect of the PCB must be considered when
making an efficiency measurement. Be certain to accurately measure the voltage directly at the BCM
using the appropriate pair of contact points located at the corners of the BCM.
UG:001
Page 4
VICOR [ VICOR CORPORATION ]
