Test Procedure for the NCP1337 Adapter Evaluation Board Electronic Load Setup 5A Current Mode Figure 1 - Test Setup 9/21/2007 -1- Table of Required Equipment AC Power Supply, 85-265Vac 1A YOKOGAWA Power Meter WT210 Multimeter Electronic Load Test Procedure: 1. Connect the test setup as showed above in Figure 1. 2. Apply an input voltage, 85Vac < Vin < 265Vac, 50Hz or 60Hz 3. Measure Vout and Efficiency to compare with the table of desired results. Desired Results Measurements 1 Conditions Comments Pin < 0.3W 4 Vin = 230 Vac Iout = 0A Efficiency and Vout at high line and full load Vin = 230 Vac Iout = 5A Efficiency and Vout at low line and full load Vin = 100 Vac Iout = 5A Brown out: Turn off level Iout = 5A 5 Brown out: Turn on level Iout = 5A Vin = 75-85 Vac 6 Overpower Protection at high line Vin = 230 Vac Iout < 7Amax Power come into auto restart mode 7 Output over voltage protection at high line Vin = 230 Vac Power latch off Short circuit of opto-coupler U1 pin1 to Pin2 2 3 Standby input power at high line Results 9/21/2007 Output no load Efficiency > 88% Efficiency = (Pout/Pin)*100 Vout = 12V ± 5% Efficiency > 84% Efficiency = (Pout/Pin)*100 Vout = 12V ± 5% Vin = 65-75 Vac -2-