Vicor VI Chip VTM Evaluation Board - Manual (Page 4)

UG:014 vicorpower.com Applications Engineering: 800 927.9474 Page 4
General Components
1. VTM® (PS10)
2. Input lugs (+IN and –IN): Sized for #10 hardware. Use these for making connection
to the input source. This board does not contain reverse polarity protection. Check
for proper polarity before applying power.
3. Input filtering: Input capacitor (CIN) and filtering (ceramic capacitors) allows for
stable operation with most input sources. Sockets can be used for easy installation
of aluminum-electrolytic input capacitor.
4. Power/Signal connector (J14): Used to receive the power (+OUT/-OUT) and VC from
upstream PRM board when used.
5. Signal connector (J11): Used to transfer VTM PC, IM, TM, -IN and output sense
signals between the VTM and PRM® boards. TM pin of the VTM provides feedback
to the VT pin of the PRM in adaptive loop operation of PRM and VTM. +S and –S
signals provide voltage sensing to the PRM remote sense circuitry for non-isolated
remote sense operation.
6. Output lugs (+OUT, -OUT): Sized for #10 hardware. Use these lugs to connect the
output directly to the load.
7. Output filtering(ceramic capacitors): Helps to minimize switching ripple
of the output voltage.
8. Output oscilloscope probe jack (J12): Used for making accurate scope
measurements of the output voltage (i.e. ripple). Remove scope grounding lead
and insert probe directly into jack ensuring a good connection between the jack
and the probe ground barrel. Do not attempt to install while power is applied. May
not be compatible with all scope probes.
9. TM filtering: Filters the TM signal noise. Corner frequency of the filter is set well
below the VTM switching frequency.
10. Sense pins and local sense resistors: Used to sense the output votage of the VTM
for non-isolated remote sense operation. Local sense resistors can be bypassed by
connecting twisted pair from the sense test points directly to the load.
11. VTM isolation boundry: Zero ohm shunt can be soldered or use sockets to break the
isolation for non isolated remote sense operation of VTM board and PRM board.
12. Heat sink push-pins: Secure the heat sink to the board using these pins. Use of a fan
across the heat sink is highly recommended for proper cooling.
13. Mating connectors: Connect the PRM and VTM with the connecters to share power
and signal connection.