11/12/2012 - 2 - www.onsemi.com
Equipment Needed
AC Source – 100V ac to 265 V ac 50/60 Hz Minimum 1A ac capability
AC Wattmeter – 30W Minimum, True RMS Input Voltage and Current, Power Factor 0.2%
accuracy or better
DC Voltmeter – 30V dc minimum 0.1% accuracy or better
DC Ammeter – 1A dc minimum 0.1% accuracy or better
LED Load – 24 V dc nominal (8 LEDs) rated for at least 750 mA dc operation
Calibration Procedure
1. Connect the Unit Under Test (UUT) per the test set up in Figure 1
2.
Figure 1 Test Set Up
3. Set the AC source to 120V ±1V ac RMS 60 Hz or 230V ±2V ac RMS 50 Hz.
4. Adjust R17 such that the output current at 100 V ac and 132 V ac or 200 V ac and 265 V
ac are equal or as close as adjustment allows.
Note: Unless otherwise specified, all voltage measurements are taken at the terminals of
the UUT.
