Test Procedure for the LV5012MD2GEVB Evaluation Board 1.Test Setup 1.1 Test Equipment Voltage Source: 120VAC 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: CREE XLamp MX-3S LEDs) Oscilloscope: LeCroy WaveRunner 6050A Operating Temperature: 25℃ 1.2 Recommended Test Setup Volt Meter + Power Meter Neutral AC INPUT AC Source AMP Meter LED+ LV5012MD2GEVB Line Dimmer Min At No Dimming, Connect this line LED- Max 2 Parallel of 6 LEDs series Figure1. LV5012MD2GEVB Recommended Test Set Up 1.3 List of Test Points Table1. Test Points Functions TEST POINTS NAME DESCRIPTION Neutral 120VAC neutral connection Line 120VAC line voltage LED+ LED anode connection LED- LED cathode connection 4/22/2014 1 www.onsemi.com 2. Test Procedure 2.1 Line/Load Regulation and Efficiency Measurement Procedure 1. Connect LV5012MD2GEVB 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 120VAC. 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 108VAC to 132VAC 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 LV5012MD2GEVB 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 120VAC. 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. 4/22/2014 2 www.onsemi.com 3. Performance Data 3.1 Efficiency 3.2 Power factor Power Factor vs Input Voltage Efficiency vs Input Voltage 92 50Hz 91 60Hz 1.00 50Hz 60Hz 0.98 89 Power Factor Efficiency [ % ] 90 88 87 86 85 0.96 0.94 0.92 0.90 84 0.88 83 82 0.86 100 110 120 130 140 100 Input Voltage [ VAC ] 110 120 130 140 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 200 Output Voltage vs Input Voltage 59.0 50Hz 50Hz 60Hz 190 60Hz 58.5 Output Voltage [ V ] LED Current [ mA ] 180 170 160 150 140 58.0 57.5 57.0 56.5 130 120 56.0 100 110 120 130 140 100 Input Voltage [ VAC ] 120 130 140 Input Voltage [ VAC ] Fgure4. LED current vs Input voltage 4/22/2014 110 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 [10V/div] CH1 : Input voltage (VAC) [100V/div] CH4 : output current (LED current) [200mA/div] CH4 : Input current [200mA/div] 5ms/div 5ms/div Figure6. Input waveform Figure7. Output waveform 3.7 Switching operation waveform 3.8 LED Current vs Phase angle [ VAC=120V, 60Hz, Dimmer : LEVITON IPI06 ] LED Current vs Phase angle 180 CH1 : Q1 Drain voltage [100V/div] CH4 : Q1 current [500mA/div] LED Current [mA] 160 140 120 100 80 60 40 20 0 10us/div 0 20 40 60 80 100 120 140 160 180 phase angle [ deg ] Figure8. Switching operation waveform 4/22/2014 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=120V, 60Hz, Dimmer : LEVITON IPI06 ] [ VAC=120V, 60Hz, Dimmer : LEVITON IPI06 ] CH1 : Input voltage = Dimmer output [100V/div] CH1 : Input voltage = Dimmer output [100V/div] CH4 : Input current [200mA/div] CH4 : Input current [200mA/div] 5ms/div 5ms/div Figure10. Dimming operation waveform at Figure11. Dimming operation waveform at phase angle=120degree phase angle=60degree 4/22/2014 5 www.onsemi.com