Test Setup and Power-Up/Power-Down Instructions
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SNVU587A – November 2017 – Revised October 2018
Copyright © 2017–2018, Texas Instruments Incorporated
UCC28064EVM-004 300-W Interleaved PFC Pre-Regulator
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Test Setup and Power-Up/Power-Down Instructions
WARNING
There are high voltages present on the pre-regulator. It must only
be handled by experienced power supply professionals. To
evaluate this board as safely as possible, the following test
configuration must be used:
•
Connect an isolation transformer between the source and unit
•
Attach a voltmeter and a resistive or electronic load to the unit output
before
supplying power to the EVM.
A separate 13-V bias supply is required to power the UCC28064A control circuitry. The unit will start up
under no-load conditions. However, for safety, a load must be connected to the output of the device before
it is powered up. The unit must also never be handled while power is applied to it or when the output
voltage is above 50-V dc. Refer to
for a recommended test setup diagram.
CAUTION
There are very high voltages on the board. Components can and will reach
temperatures greater than 100°C. Use caution when handling the EVM.
