On 31/10/1996 Rich Nute wrote: > In essence, IEC 1000-3-2 outlaws the conventional > rectifier-storage capacitor circuit. For power > exceeding 75 watts, for all practical purposes, > you MUST go to a PFC circuit.
Well, not necessarily. If I understand this correctly, for input less than 75 W, there is simply no test required. If the input exceeds 75 W, then the waveform must be analyzed, but it won't necessarily fail. A normal design switching power supply around 200 W will more than likely need PFC. But one around 100 W or so may well comply without any modifications ... Disclaimer: Opinions expressed above are strictly personal and don't necessarily reflect the official position of the Canadian Standards Association. __________________________________________________________ Egon H. Varju, P.Eng. Thursday, 31 October 1996 @ 9:09 PM CSA Pacific Region Tel: 1-604-244-6640 HAVE MODEM - WILL TRAVEL Fax: 1-604-244-6600 E-mail: [email protected] [email protected] __________________________________________________________
