Vicor Full-chip PRM-RS Customer Board - Manual (Page 11)

UG:009 vicorpower.com Applications Engineering: 800 927.9474 Page 11
8.1.1 PRM ® Board Stand-alone Operation Setup
This is the nominal configuration, and requires no rework to implement. If the board has
been modified, restore to its original configuration.
1. Solder test leads to signals on the test point header that will be measured.
2. Connect input source to the input lugs. Verify proper polarity. Set to 0 Volts or OFF before
connecting.
3. Connect output to load using the output lugs. Set load to 0 Amps or OFF.
4. Insert oscilloscope probe into J01 if used.
5. Connect DMM to the output test points (V OUT+ , V OUT- ) and to any other signals to be
measured.
6. Set PC Enable Switch (S01_2) to the left position.
7. Apply nominal input voltage.
8. Measure output voltage and verify operation.
9. Use the output voltage trim pot (R 22 ) to adjust the output to the desired level.
10. Apply 100% load, and verify full load operation.
11. Turn off load and power. Proceed to following sections for detailed test procedure.
8.2 PRM – VTM Board Operation, Local Sense
In this configuration, the PRM and VTM ® Customer Boards are connected together to form a
PRM / VTM-pair and regulation is performed at the PRM module output. Load regulation will
be degraded due to the VTM module output resistance. Tighter regulation can be achieved by
implementing non-isolated remote sense as described in Section 8.3.
8.2.1 PRM – VTM Board Local Sense Setup
Local sensing is the nominal configuration of the customer board and requires no rework to
implement. If the board has been modified, restore it to its original configuration.
1. Solder leads to any signals on the test point header to be measured.
2. Identify the type of VTM Customer Board to be used (Type A, or Type B).
a. Type A: Install single male-to-male header to X01 only.
b. Type B: Install dual male-to-male headers on X01 and X03.
3. Connect desired VTM board referring to Figure 11 or Figure 12.
4. Connect input source to the input lugs. Verify proper polarity.
Set to 0 Volts or OFF before connecting.
5. Connect VTM board output to load using the output lugs. Set load to 0 Amps or OFF.
6. Insert oscilloscope probe into VTM board output probe jack.
7. Connect DMM to the VTM board output test points and to any other signals to be measured.
8. Set PC Enable Switch (S01_2) to the left position.
9. Apply nominal input voltage.
10. Measure VTM board output voltage and verify operation.
11. Use the output voltage trim pot (R 22 ) to adjust the output to the desired level.
a. Do not trim below the minimum input voltage of the VTM module used.
12. Apply 100% load, and verify full load operation.
13. Turn off load and power. Proceed to following sections for detailed test procedure.