Vicor Westcor PFC Mini Power Factor Corrected AC-DC Switcher User Manual

Page 13

UG:115

vicorpower.com

Applications Engineering: 800 927.9474

Page 13

In order to minimize parasitic cable inductance and reduce EMI, the output power
cables should be routed in close proximity to one another, and large current loops
should be avoided. To avoid excessive voltage drop, do not undersize power cables,
especially for high-current outputs. Excessive cable inductance coupled with large
capacitive loading can introduce instability in switching power supplies. This problem
can be avoided with proper system design. Consult Vicor’s Applications Engineering
Department for assistance with applications that use long cable lengths and excessive
load capacitance.

Note:

Effective January 2001, PFC Minis using VI-J00 modules on a dualboard (dual output) now require

an 18-pin connector (Molex PN# 39-01-2180) vs. a 14-pin (Molex PN# 39-01-2140), making them the
same as dualboards with Mini converters. If you already have a 14-pin design in, the change to the
18-pin should not affect your design in. Remove the harness assembly from the 14-pin connector
housing and insert the harness connector pins into the 18-pin connector housing. Contact Field
Applications for further information.

Output Return

SxJ2

Output

Figure 3.

Power Connections for

Single Output

Figure 4.

Power Connections for

Dual Output

18 Pin DUAL MINI AND JR. MODULE OUTPUT CONNECTIONS

SxJ1-15.

SxJ1-6.
SxJ1-7.

SxJ1-16.

PIN DESCRIPTION

SxJ1-1.

PIN DESCRIPTION

SxJ1-2.
SxJ1-3.
SxJ1-4.
SxJ1-5.

SxJ1-10.
SxJ1-11.

SxJ1-14.

SxJ1-12.
SxJ1-13.

SxJ1-9.

SxJ1-18.

SxJ1-8.

SxJ1-17.

+OUTPUT M1

+OUTPUT M1
+OUTPUT M1

-OUTPUT M1
-OUTPUT M1

-OUTPUT M1

-OUTPUT M2
-OUTPUT M2

-OUTPUT M2

+OUTPUT M2

+OUTPUT M2
+OUTPUT M2

TRIM M1

TRIM M2

-SENSE M1

-SENSE M2

+SENSE M1

+SENSE M2

14 PIN DUAL MODULE OUTPUT CONNECTIONS

SxJ1-1 +SENSE M1

SxJ1-3. -OUTPUT M1

SxJ1-2. +OUTPUT M1

PIN DESCRIPTION

SxJ1-4. TRIM M1
SxJ1-5. +OUTPUT M2
SxJ1-6. -OUTPUT M2
SxJ1-7. +SENSE M2

SxJ1-8. -SENSE M1
SxJ1-9. +OUTPUT M1

SxJ1-11. TRIM M2
SxJ1-12. +OUTPUT M2
SxJ1-13. -OUTPUT M2
SxJ1-14. -SENSE M2

SxJ1-10. -OUTPUT M1

PIN DESCRIPTION