Test Procedure for the NCP1654PFCGEVB Evaluation Board Test Equipments Setup (refer to Figure 1) 1. Apply a 500 / above 400 W resistive load (or use a set of resistors placed in parallel) across the output (between the +V and -V TB2 terminals of the board) via 2 power switches, SW1 and OUT OUT SW2. 2. Apply a 3 k / 400 W resistor load in parallel with above 500 load via another power switch, SW3. 3. Apply one isolated ac power source which power range is above 500 VA to the TB1 of NCP1654 demo board through the power meter. 4. Place a power meter, e.g. WT210 from YAKOGOWA, to measure: - The power delivered by the power source (Pin), - The power factor (PF) and the Total Harmonic Distortion (THD) of the current absorbed from the ac power source. 5. Supply the controller by applying 15 V to the V socket (between the +12 V and GND TB3 CC terminals of the board). 6. Use one oscilloscope to measure: - The output voltage of NCP1654 demo board (between the +V and -V TB2 terminals of OUT OUT the board) by one high voltage probe. - The input current of NCP1654 demo board by one isolated current probe. Test 1: Start up at low line, full load Test conditions: 1. SW1 and SW2 close, SW3 open. (output load is full load) 2. AC input: 85 Vac, 60 Hz 3. Use 15 V dc source applied to TB3 to enable the operation. Test criteria: - V should be in the range from 378 V to 401 V. OUT - Input current should be sinusoidal without distortion (refer to Ch4 shown in Figure 2), which is measured by oscilloscope. - PF > 0.99 - THD < 10% Test 2: PF, THD, Efficiency at 110 Vac, full load Test conditions: 1. SW1 and SW2 close, SW3 open. (output load is full load) 2. AC input: 110 Vac, 60 Hz 3. Use 15 V dc source applied to TB3 to enable the operation. Test criteria: - V should be in the range from 378 V to 401 V. OUT - PF > 0.99 - THD < 10% - Efficiency > 94 %. Test 3: PF, THD, Efficiency at 230 Vac, full load Test conditions: 1. SW1 and SW 2 close, SW3 open (output load is full load) 2. AC input: 230 Vac, 50 Hz 3. Use 15 V dc source applied to TB3 to enable the operation. Test criteria: - V should be in the range from 378 V to 401 V. OUT - PF > 0.98 - THD < 10% - Efficiency > 97 %. 7/15/2013 - 1 - www.onsemi.com Test 4: Over Current Limitation at 85 Vac Test conditions: 1. SW1 and SW 2 close, SW3 open for start up. (output load is full load) 2. AC input: 85 Vac, 60 Hz 3. Use 15 V dc source applied to TB3 to enable the operation. 4. After start up, close SW3 to see the behavior of over-current limitation. Test criteria: - The input current should be limited (refer to Ch4 of Figure 3) Test 5: Transient Response at 85 Vac Test conditions: 5. SW1 and SW3 open. SW 2 close. (output load is no load) 6. AC input: 85 Vac, 60 Hz 7. Use 15 V dc source applied to TB3 to enable the operation. 8. Measure V by oscilloscope when closing SW1, i.e. change the output load from 0 A to full load. OUT Test criteria: - V should be above 300 V (refer to Ch2 of Figure 4) OUT Test 6: Over-Voltage Protection Test conditions: 1. SW1 and SW 2 close. SW3 open. (output load is full load) 2. AC input: 85 Vac, 60 Hz 3. Use 15 V dc source applied to TB3 to enable the operation. 4. Measure V by oscilloscope at start up, i.e. start up at full load. OUT Test criteria: - V should be below 420 V (refer to Ch2 of Figure 5) OUT Test 7: Brown-Out Recovery Test conditions: 1. SW1 and SW 3 close. SW2 open (output load is around 0.13 A) 2. AC input: 60 Vac, 60 Hz 3. Use 15 V dc source applied to TB3 to enable the operation. 4. Measure V by oscilloscope. Set the triggering level at about 200 V (rising edge), the trigger OUT position being set at 30% of the screen. Program the scope to observe 40 ms around in single acquisition mode. 5. Increase V step by step (0.1 V for each step). Measure the V value when V goes above 200 V. ac ac OUT Test criteria: - V should be below 85 V (refer to Ch1 of Figure 6) ac ac Test 8: Brown-Out Test conditions: 6. SW1 and SW 3 close. SW2 open (output load is around 0.13 A) 7. AC input: 85 Vac, 60 Hz 8. Use 15 V dc source applied to TB3 to enable the operation. 9. Measure V by oscilloscope. Set the triggering level at about 200 V (falling edge), the trigger OUT position being set at 70% of the screen. Program the scope to observe 40 ms around in single acquisition mode. 10. Decrease V step by step (0.1 V for each step). Measure the V value when V goes below 200 V. ac ac OUT Test criteria: - V should be above 60 V (refer to Ch1 of Figure 7) ac ac 7/15/2013 - 2 - www.onsemi.com