Test Procedure for the LV5012MDGEVB Evaluation Board 1.Test Setup 1.1 Test Equipment Voltage Source: 220VAC AC source, NF EPO2000S Power Meter: HIOKI 3332 Volt Meter: ADVANTEST R6441D DIGITAL MULTIMETER AMP Meter: Agilent DIGITAL MULTIMETER 34401A Output Load: 2 Parallel of 6 LEDs series (LED: NICHIA NS6W083AT) Oscilloscope: LeCroy WaveRunner 6050A Operating Temperature: 25℃ 1.2 Recommended Test Setup Volt Meter + Power Meter AMP Meter Neutral AC INPUT AC Source LED+ LV5012MDGEVB Line Dimmer Min LED- At No Dimming, Connect this line Max 2 Parallel of 6 LEDs series Figure1. LV5012MDGEVB Recommended Test Set Up 1.3 List of Test Points Table1. Test Points Functions TEST POINTS NAME DESCRIPTION Neutral 220VAC neutral connection Line 220VAC line voltage LED+ LED anode connection LED- LED cathode connection 10/15/2013 1 www.onsemi.com 2. Test Procedure 2.1 Line/Load Regulation and Efficiency Measurement Procedure 1. Connect LV5012MDGEVB like upper Figure1. An external LED load must be used to start up the EVB. 2. Prior to turning on the AC source, set the voltage to 220VAC. 3. Turn on the AC Source. 4. Record the output voltage readings from Volt Meter and the output current reading from AMP Meter. And Record the input power reading from Power Meter. 5. Change VAC from 198VAC to 264VAC and perform “4”. 6. Refer to Section 2.2 for shutdown procedure. 2.2 Equipment Shutdown 1. Turn off equipment. 2. Make sure capacitors are discharged. 2.3 Phase Angle Decode vs LED Current (at dimming) 1. Connect LV5012MDGEVB like upper Figure1. An external LED load must be used to start up the EVB. 2. Prior to turning on the AC source, set the voltage to 220VAC. 3. Monitor the Dimmer output AC voltage between the neutral and the line by using the oscilloscope differential probe. 4. Turn on the AC Source. 5. Maximize the dimmer ratio. 6. Record the output voltage readings from Volt Meter and the output current reading from AMP Meter. And Record the input power reading from Power Meter. And Record the phase angle of Dimmer output reading from the oscilloscope differential probe. 7. Gradually lower the Dimming ratio and perform "6". Repeat it until the Dimming ratio is minimized. 8. Refer to Section 2.2 for shutdown procedure. 10/15/2013 2 www.onsemi.com 3. Performance Data 3.1 Efficiency 3.2 Power factor Power Factor vs Input Voltage Efficiency vs Input Voltage 87 50Hz 86 60Hz 1.00 50Hz 60Hz 0.98 84 Power Factor Efficiency [ % ] 85 83 82 81 80 0.96 0.94 0.92 0.90 79 0.88 78 0.86 77 190 200 210 220 230 240 250 260 190 270 200 220 230 240 250 260 270 Input Voltage [ VAC ] Input Voltage [ VAC ] Figure2. Efficiency vs Input voltage Figure3. Power factor vs Input voltage 3.3 LED Current (Output current) 3.4 Output Voltage LED Current vs Input Voltage Output Voltage vs Input Voltage 600 50Hz 20.5 50Hz 590 60Hz 20.4 60Hz 580 20.3 570 20.2 Output Voltage [ V ] LED Current [ mA ] 210 560 550 540 530 520 20.1 20.0 19.9 19.8 19.7 19.6 510 500 19.5 190 200 210 220 230 240 250 260 270 190 Input Voltage [ VAC ] 210 220 230 240 250 260 270 Input Voltage [ VAC ] Fgure4. LED current vs Input voltage 10/15/2013 200 Figure5. Output voltage vs Input voltage 3 www.onsemi.com 3.5 Input voltage/current operation waveform (No dimming) 3.6 Output voltage/current operation waveform (No dimming) CH1 : Output voltage [5V/div] CH1 : Input voltage (VAC) [200V/div] CH4 : output current (LED current) [200mA/div] CH4 : Input current [100mA/div] 5ms/div 5ms/div Figure6. Input waveform Figure7. Output waveform 3.7 Switching operation waveform 3.8 LED Current vs Phase angle [ VAC=230V, 50Hz, Dimmer : MERTEN 572599 ] LED Current vs Phase angle 600 CH1 : Q1 Drain voltage [200V/div] LED Current [mA] 500 400 300 200 100 CH4 : Q1 current [500mA/div] 0 0 10us/div 40 60 80 100 120 140 160 180 phase angle [ deg ] Figure8. Switching operation waveform 10/15/2013 20 Figure9. LED current vs Phase angle 4 www.onsemi.com 3.9 Dimming operation waveform Phase angle = 120 degree 3.10 Dimming operation waveform Phase angle = 60 degree [ VAC=230V, 50Hz, Dimmer : MERTEN 572599 ] [ VAC=230V, 50Hz, Dimmer : MERTEN 572599 ] CH1 : Input voltage = Dimmer output [200V/div] CH1 : Input voltage = Dimmer output [200V/div] CH4 : Input current [100mA/div] CH4 : Input current [100mA/div] 5ms/div 5ms/div Figure10. Dimming operation waveform at Figure11. Dimming operation waveform at phase angle=120degree phase angle=60degree 10/15/2013 5 www.onsemi.com