4 EVM Setup and Operation
Safety:
This evaluation module is not encapsulated and there are accessible voltages that are greater than 50
V
DC
.
Isolation Input Transformer:
A suitably rated 1:1 isolation transformer shall be used on the input(s) to this EVM
and be constructed in a manner in which the primary winding(s) are separated from the secondary winding(s) by
reinforced insulation, double insulation, or a screen connected to the protective conductor terminal.
WARNING
• If you are not trained in the proper safety of handling and testing power electronics please do not
test this evaluation module.
• While the EVM is energized, never touch the EVM or its electrical circuits, as they could be at
high voltages capable of causing electrical shock hazard.
• Caution Hot surface. Contact may cause burns. Do not touch!
• Read this user's guide thoroughly before making test.
WARNING
Caution: Do not leave EVM powered when unattended.
4.1 Recommended Test Equipment
1. V
IN
: DC power supply, 40 V to 1000 V output, capable of supplying up to 2 A
2. I
OUT
: Electronic load, capable of supporting at least 25 V with loads of 0 A to 3.0 A
3. Two DVMs measuring DC voltage
a. The DVM monitoring VIN+ must be able to withstand 1000 Vdc
4. Two DVMs measuring DC current
5. Oscilloscope: 4 channel, 500 MHz or better
a. Recommend three high voltage probes (rated to 1000 V CAT II, 2500 Vpk
b. Recommend one differential probe (±140V low range at 1/20, ±1400V high range at 1/200)
6. Thermal camera (optional) or thermocouple to measure T1 case temperature
4.2 External Connections
The UCC28C56EVM-066 EVM utilizes screw terminals for quickly connecting to V
IN
and V
OUT
. Connecting
the appropriate ammeters and voltmeters, as shown in Figure 4-1, allows accurate EVM efficiency and load
regulation measurements.
4.2.1 Setup and Connection of Test Equipment
1.
Before connecting
it to the EVM, turn on and adjust the
VIN power supply to 50 V
and set its
current
limit to 1.5 A
.
2. Turn off/disable the VIN power supply.
3. Connect the V
IN
power supply to J2 (V
IN
+) and J1 (GND).
4. Connect the variable load to J4 (V
OUT
+) and J3 (ISO_GND).
5. Set the load to the constant current (CC) and 0.25 A. Enable the load.
EVM Setup and Operation
6
Using the UCC28C56EVM-066 High-Density 40-W Auxiliary Power Supply for
800-V Traction Inverters
SLUUCN1C – JUNE 2022 – REVISED DECEMBER 2022
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