Texas Instruments UCC25640EVM-020, User Manual, Page: 14 / 40

Test Procedure
www.ti.com
14 SLUUBX3B – June 2019 – Revised November 2019
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
UCC25640EVM-020 Evaluation Module
8 Test Procedure
Use the following steps for the test procedure:
1. Refer to Section 5.2 for basic setup. The required equipment for this measurement is listed in
Section 5.1 .
2. Before making electrical connections, visually check the board to make sure there are no suspected
spots of damage.
3. Keep the DC voltage source output off. Connect the DC source to J1 (+) and J2 (-). The DC voltage
source should be isolated and meet the IEC 60950 requirement. Set the DC output voltage within the
range specified in
Table 1 , between 365 VDC and 410 VDC; set the DC source current limit to 1 A.
CAUTION
The board has no fuse installed and relies on the external voltage source
current limit to ensure circuit protection.
4. Keep the AC voltage source output off. Connect the source with AC_neutral to J8-1, AC_earth to J8-2,
and AC_line to J8-3. Isolate the AC voltage source and meet the IEC 60950 requirement. Set the AC
output voltage and frequency within the range specified in
Table 1 , between 85 and 265 VAC and 47
to 63 Hz. Set the AC source current limit to 200 mA.
5. Connect an electronic load set to either constant-current mode or constant-resistance mode. The load
range is from 0 to 15 A.
6. If the load does not have a current or a power display, TI recommends inserting a current meter
between the output voltage and the electronic load.
7. Connect a voltage meter to TP10 and TP3/TP4 to monitor the output voltage.
8. Turn on the AC source output.
9. Turn on the DC source output.
8.1 Equipment Shutdown
Shut down the equipment using the following steps:
1. Shut down the AC voltage source.
2. Shut down the DC voltage source.
3. Shut down the electronic load.
WARNING
High voltage may still be present on the resonant capacitors after
turning off the DC source.