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  1. drchen

    Any harmonic standards for switch-mode power supply have to pass in US

    Thank you, Lewish. You mean power supply for home computer or entertainment product has to meet EN61000-3-2 and EN61000-3-3 in US market? And US is going to require PFC function for power supply? My power supply will be less than 500 watts, is it affected by the new harmonic limit requirement...
  2. drchen

    Any harmonic standards for switch-mode power supply have to pass in US

    Thank you, RonShap, your statement is very helpful. According to the papers published by USCCEMC Harmonics Workshop in 3/22/00, USCCEMC intended to disagree with IEC/EN61000-3-2(Harmonic) and IEC61000-3-3(Inrush). The Committee contnds the IEC standards as: 1. Absence of quantitative rationale...
  3. drchen

    Any harmonic standards for switch-mode power supply have to pass in US

    Thank you for your advices, dpc and busbar. I know power supplies for US market must pass FCC standards for EMC regulations and UL safety(UL1950) standard and AC input transeint test. The only thing I don't know is any Harmonic standard(like IEC/EN61000-3-2 for CE market) in US must pass or not?
  4. drchen

    Any harmonic standards for switch-mode power supply have to pass in US

    I am going to design switch-mode power supplies/battery chargers just for US market. I know if these products designed for CE market, they have to pass EN61000-3-2 harmonic standard, which means the designs must include PFC functions. But if the products just for US market, any similiar harmonic...

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