Vicor VTM Customer Evaluation Boards - Manual (Page 7)

UG:003 vicorpower.com Applications Engineering: 800 927.9474 Page 7
VTM-CB (Figure 4)
The VTM ® module provides the isolation stage and the output voltage step down. When paired with
the PRM the chip set forms a traditional DC-DC converter. The -CB board for the VTM is intended to
be used in conjunction with the PRM-CB; nevertheless, in order to test this standalone, it is possible to
inject a VC pulse as specified in the data sheet to the exposed lead from the header corresponding to
the VC pin. Refer to the board schematic Figure 5 for the appropriate pin(s.) An impedance
measurement may prove just as expeditious.
Board Overview
1 Source voltage input points (Item 1) are designed to accommodate #10 hardware and Panduit ring
lugs. BE CERTAIN POLARITY IS CORRECT BEFORE APPLYING POWER.
2 Input connector J01 (Item 2) mates with PRM-CB providing Vin and VC. As can be seen from the
following schematic there are four pins dedicated to the + In, four for the -In, and two for the
VC. Each contact is rated for 3 A. The excess capacity afforded by these pins can facilitate testing
multiple VTM-CBs from a single PRM-CB using an appropriate wiring harness and mating
connector. This may also be achieved using the large pads of Item 1.
Note: There is a removable male to male insert installed into this connector. This allows the
mate to be either gender which may be important depending upon the availability of connectors.
3 The Kelvin connection points for Vin and Vout (Item 3) are for use in efficiency measurements.
4 The scope jack (Item 4) is used to view output voltage parameters.
5 Output voltage points (Item 5) are designed to accommodate #10 hardware and Panduit
ring lugs.
1
2
3
4
5
3
Figure 4
VTM-CB