SLUUCI9A January 2022 – December 2022 UCC28781
Safety: This evaluation module is not encapsulated and there are accessible voltages that are greater than 50 VDC.
Input Isolation Transformer: A suitably-rated 1:1 isolation transformer shall be used on the AC input to this EVM and be constructed in a manner in which the primary windings are separated from the secondary windings by reinforced insulation, double insulation, or a screen connected to the protective conductor terminal.
Voltage Source: Isolated AC source or variable AC transformer capable of 264 VRMS and capable of handling 100-W power level. Warning:Do not apply DC voltage to this board when the X-capacitor discharge function is enabled, or damage may happen. If a DC voltage source must be used at AC Input J1, the XCD Jumper at J5 must be set to "XCD DISABLED" position before DC power is applied. Remove all power from the EVM before changing position of the XCD Jumper.
Output Meters: Digital voltage meter, digital current meter
Input Power Analyzer: Capable of measuring 10 mW to 100 W of input power and capable of handling 264-VRMS 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. For efficiency assessments, remember to subtract the power losses of R33, R34, and R35 (across C2) from the input power measurements.
Oscilloscope:
Output Load: Resistive or electronic load capable of handling 100 W at 15 V.
Recommended Wire Gauge: Insulated 18AWG.
Set up the test configuration for AC input as shown in Figure 7-2.
Caution: Do not leave EVM powered when unattended.
!! Do not apply DC voltage source to the AC input of this board or damage can happen! (See above set-up of Voltage Source)