Test Procedure for the NCP4371QC30GEVB Demoboard W USB-A to USB-B micro AC source 90 ÷ 265 Vac Ext. Power Supply +5.5V DC + A V DC load 19 V / 3.5 A Figure 1: Test Setup The following steps describe the test procedure for all these boards: Required Equipment: Current limited AC Power Supply (e.g. AGILENT 6811B) ································ 1pc DC Volt-Meter able to measure up to 60 V DC (e.g. KEITHLEY 2000) ················· 1pc DC Amp-Meter able to measure up to 5 A DC (e.g. FLUKE 89 IV) ······················ 1pc Watt-Meter (e.g. Yokogawa WT210) ·························································· 1pc DC Electronic Load (e.g. AGILENT 6060B) ················································· 1pc QC3.0 EMULATOR ············································································· 1pc Test Procedure: 1. Connect the test setup as shown in Figure 1. 2. Apply an input voltage, VIN = 120 Vac 3. Check VOUT= 5.0 V +/- 0.2 V 4. Apply IOUT(load) = 500 mA 5. Check VOUT> 4.5 V 6. Check efficiency that Eff > 80% 7. Apply IOUT(load) = 2 A 8. Check VOUT> 4.5 V 9. Check efficiency that Eff > 82% 10. Apply IOUT(load) = 1 A 11. Push button MODE on QC3.0 Emulator, yellow LED HVDCP_CNT is on 12. Push UP button several times and observe if VOUT increases in 200mV steps 13. Push DOWN button several times and observe if VOUT decreases in 200mV steps 14. Push button MODE on QC3.0 Emulator (2x), yellow LED HVDCP_9V is on 15. Check VOUT> 8.5 V 16. Push button MODE on QC3.0 Emulator (1x), yellow LED HVDCP_12V is on 17. Check VOUT> 11.5 V 18. Push button MODE on QC3.0 Emulator (1x), yellow LED HVDCP_20V is on 19. Check VOUT> 11.5 V 20. Push button MODE on QC3.0 Emulator (1x), yellow LED HVDCP_5V is on 21. Check VOUT> 4.5 V 22. Increase an input voltage to VIN = 230 Vac 23. Apply IOUT(load) = 2 A 24. Check VOUT> 4.5 V 25. Check efficiency that Eff > 82% 26. Turn off AC source 27. End of the test