Vicor PFC Micro Power Factor Corrected AC-DC Switcher User Manual
Page 4
Pg. 4
Vicor 800-735-6200 Westcor Division 408-522-5280 Applications Engineering 800-927-9474
03-000048 rev A
PFC Micro Design Guide
Part Numbering
PFC Micro
PCx1-x2 x3 (x4)-xxxx-x5
x1
Number of outputs
e.g. PC6-06-5012-G
x2
Number of VI-200/VI-J00 modules
x3
Number of Maxi, Mini and Micro modules
x4
Optional Factory assigned
xxxx
Sequential number assigned by Westcor
x5
Optional Factory assigned
note: x5 = MI for rugged chassis, =MC for rugged chassis w/conformal coating
Mechanical Considerations
The PFC Micro can be mounted on one of three surfaces using standard 8-32 or 4 mm screws. Maximum allowable
torque is 5 in. lbs., and the maximum penetration of 0.25 in (6mm) on the sides and 0.125 in. (3mm) on the bot-
tom.
When selecting a mounting location and orientation, the unit should be positioned so air flow is not restricted.
Maintain a 2" (5,1cm) minimum clearance at both ends of the PFC Micro, and route all cables so airflow is not
obstructed. The power supply draws air in at the fan side/AC input side and exhausts air out the load side. If air-
flow ducting is used, avoid sharp turns that could create back pressure. The fan moves approximately 10 CFM of
air.
Avoid excessive bending of output power cables after they are connected to the output terminals. For high-current
outputs, use cable ties to support heavy cables and minimize mechanical stress on connectors. Be careful not to
short-out to neighboring outputs. The maximum torque recommended on output nuts is 10 in. lbs.
Avoid applications in which the unit is exposed to excessive shock or vibration levels as the unit is designed pri-
marily for office type equipment. In such applications, a shock absorbing mount design is required.
PFC Micro Do’s and Don't
•
Do not restrict airflow to the unit. The cooling fan draws air into the unit and forces it out at the output power
terminals. A minimum of 2” in front and behind the supply should be maintained in order to prevent air
obstructions.
•
Run the output (+/–) power cables next to each other to minimize inductance.
•
Do not attempt to repair or modify the power supply in any manner. In the event of problems, contact
Customer Service at 1-800-735-6200..
•
Insert proper fault protection at power supply input terminals (i.e., a fuse).
•
Use proper size wires to avoid overheating and excessive voltage drop.
•
Output voltages over 60Vdc, whether from individual modules or series arrays, are considered as hazardous
secondary outputs under UL 60950. Appropriate care must be taken in design implementation of the supply.