10. LED lamp used in lighting application must meet what level of harmonic current and THD?
10. LED lamp used in lighting application must meet what level of harmonic current and THD?
Lighting products must follow EN61000-3-2. The test limit will depend on input power level. If the input power is >25W then it must comply with Class C requirement. If the input power is <25W, it only needs to comply with Class D. Currently EN61347 does not have any THD requirement. Taiwan national standard CNS15233 has THD requirement of 33%. Internationally, the THD restriction could be as low as 20%. GTEK LED power supply with dual stage PFC generally meets THD of <20% under test conditions of 277VAC/50Hz/80%load.
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