Test Procedure for the LV5011MD2GEVB Evaluation Board 1.Test Setup 1.1 Test Equipment Voltage Source: 230VAC AC source, NF EPO2000S Power Meter: HIOKI 3332 Volt Meter: ADVANTEST R6441D DIGITAL MULTIMETER AMP Meter: Agilent DIGITAL MULTIMETER 34401A Output Load: 5 LEDs series (LED: OSW4Z3E1C1E) Oscilloscope: LeCroy WaveRunner 6050A Operating Temperature: 25℃ 1.2 Recommended Test Setup Volt Meter + Power Meter AMP Meter Neutral AC INPUT AC Source LED+ LV5011MD2GEVB Line Dimmer Min LED- At No Dimming, Connect this line Max LED Figure1. LV5011MD2GEVB Recommended Test Set Up 1.3 List of Test Points Table1. Test Points Functions TEST POINTS NAME DESCRIPTION Neutral 230VAC neutral connection Line 230VAC line voltage LED+ LED anode connection LED- LED cathode connection 7/16/2014 1 www.onsemi.com 2. Test Procedure 2.1 Line/Load Regulation and Efficiency Measurement Procedure 1. Connect LV5011MD2GEVB 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 230VAC. 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 LV5011MD2GEVB 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 230VAC. 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. 7/16/2014 2 www.onsemi.com 3. Performance Data 3.1 Efficiency 3.2 Power factor Power Factor vs Input Voltage Efficiency vs Input Voltage 0.85 86 50Hz 50Hz 60Hz 60Hz 0.80 Power Factor Efficiency [ % ] 84 82 80 0.75 0.70 0.65 78 0.60 76 190 200 210 220 230 240 250 260 190 270 200 210 220 230 240 250 270 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 50.0 120 50Hz 50Hz 60Hz 60Hz 49.5 Output Voltage [ V ] 110 LED Current [ mA ] 260 100 90 80 49.0 48.5 48.0 47.5 70 60 47.0 190 200 210 220 230 240 250 260 270 Input Voltage [ VAC ] 200 210 220 230 240 250 260 270 Input Voltage [ VAC ] Fgure4. LED current vs Input voltage 7/16/2014 190 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 (VAC) [20V/div] CH1 : Input voltage (VAC) [200V/div] CH4 : Output current [50mA/div] CH4 : Input current [100mA/div] 5msec/div 5msec/div Figure6. Input waveform Figure7. Output waveform 3.7 LED Current vs Phase angle [ VAC=230V, 50Hz, Dimmer : MERTEN 572599 ] LED Current vs Phase angle 100 LED Current [mA] 90 80 70 60 50 40 30 20 10 0 0 20 40 60 80 100 120 140 160 180 phase angle [ deg ] Figure8. LED current vs Phase angle 7/16/2014 4 www.onsemi.com 3.8 Dimming operation waveform Phase angle = 120 degree 3.9 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] 5msec/div 5msec/div Figure9. Dimming operation waveform at Figure10. Dimming operation waveform at phase angle=120degree phase angle=60degree 7/16/2014 5 www.onsemi.com