Led Design Guide Page 9 LED Design Guide

2015 Littelfuse LED Lighting Design Guide www.littelfuse.com LED Lighting Design Guide Additional test requirements include: For self-ballasted lamps and luminaires < 25W , 500V/250A: Apply 500V L-L with 2 ohm source impedance and 1kV L-G with 12 ohms impedance. For luminaire > 25W , 1000V/500A: Apply 1kV L-L with 2 ohm source impedance and 2kV L-G with 12 ohms impedance. Number of surges: 10 strikes, 5+ and 5- at phase angles 90/270, 1 minute between each strike. In the US, manufacturers generally must meet Energy Star transient voltage surge specifications for LED replacement bulb assemblies used in residential and certain commercial applications. For example, Version 1.4 of the Energy Star program requirements define a ring wave transient test for integral LED lamps ( Figure 5 ). Other test requirements include: Test Level: 2.5kV/83A, line-to-line (ANSI/IEEE C.62.41-1991, Class A operation). Number of surges: 7 strikes in common mode and 7 in differential mode, 1 minute between each strike. 0 0.2 0.4 0.6 0.8 1.0 0 -1.0 -0.8 -0.6 -0.4 -0.2 10 20 30 Rise Time = 0.5 s 10 s Time ( s) V(t)/Vp The 100 kHz Ring Wave (voltage and current) Figure 5. Energy Star transient voltage immunity test waveform: 0.5s rise time 10s duration (100kHz) ring wave. Surge Immunity Requirements for Consumer LED Lighting/Retrofit Lamps (continued) 9

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