7 Test Setup
7.1 Test Setup Requirements
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.
Voltage Source:
Isolated AC source or variable AC transformer capable of 264 V
RMS
and capable of handling
100 W power level.
Warning:
Do not apply DC voltage to this board when making test, or damage may
happen
. If DC voltage source has to be used, the XCD pins need to be grounded by adding R3 = 0 Ω and
removing Q3.
Voltmeter:
Digital voltage meter
Power Analyzer:
Capable of measuring 1 mW to 100 W of input power and capable of handling 264-V
RMS
input
voltage. Some power analyzers may require a precision shunt resistor for measuring input current to measure
input power of 5 W or less. Please read the power analyzer’s user manual for proper measurement setups for
full power and for stand-by power.
Oscilloscope:
• 4-Channel, 500 MHz bandwidth.
• Probes capable of handling 600 V.
Output Load:
Resistive or electronic load capable of handling 100 W at 20 V.
Recommended Wire Gauge:
Insulated 22 AWG to 18 AWG.
WARNING
Caution: Do not leave EVM powered when unattended.
!! Do not apply DC voltage source to this board or damage may happen !! (See above setup of
Voltage Source)
Test Setup
10
Using the UCC28782EVM-030 65-W USB-C PD High-Density Active-Clamp
Flyback Converter
SLUUBZ3B – MAY 2020 – REVISED AUGUST 2020
Copyright © 2022 Texas Instruments Incorporated
