Vicor PFC MegaPAC-HPEL Power Factor Corrected AC-DC Switchers - Manual (Page 26)

UG:119 vicorpower.com Applications Engineering: 800 927.9474 Page 26
Current Share Boards - Optional Feature (Cont.)
Requirements:
1. For proper operation, the power supplies being paralleled should be enabled at the
same time.
2. -Out conductors must be of equal length and wire gauge.
Separate -Out conductors must be used from each supply to the load, or the use of
a "Y" connection to a common point must be used as shown in Figure 12. Each leg of
the "Y" must have a minimum of a few millivolts of drop in order for proper
operation. 50 mV to 100 mV of drop will provide from 5% to 1% accuracy.
3. -V1 and -V2 for all Box-to-Box circuits must be connected directly at the negative
output power studs or terminals to achieve accurate current sharing.
4. D* can be added if redundancy is needed. If redundancy is not required, D* can be
replaced with direct wire connections.
5. When using D*, the Power input should be connected on the cathode side of the
paralleling diodes as shown above.
6. Terminate Sense Leads either locally or remotely as shown in Figure 12.
7. For paralleling more than two supplies consult factory for assistance.