PFC Switch Mode Power Supply

Powersoft has always been very focused on energy saving and the use of the Power Factor Correction (PFC) has been a trademark for improving performance and containing mains current draw and consumption.
Show business has been always very sensitive to environmental issues and in the last years, many artists have started to promote their tours as “green”, trying to use alternative energy or planting trees locally as compensation for the CO2 produced for each concert.
PFC is a mandatory technology for many business fields, as computer products, and it can really help to preserve our planet, as it allows:


  • energy saving with a reduction of approximately 40%;
  • reduction of the size of the generators;
  • a reduction of the cable sections, since lower RMS currents are reached during the use;
  • less emissions on the cables because of the lower harmonics of the mains frequency. This produces
  • less hum and induced distortion because of perturbed mains;
  • an audio amplifier to deliver its full output disregarding the mains voltage fluctuations and load impedance as with PFC the
  • power supply regulates itself automatically;
  • the production of a global product that is usable all over the world without any worry of differences in the mains voltage.
  • Cooler operation for a reduced air conditioning necessities in fixed installations

Powersoft technology proved to be a winner and many competitors are looking at PFC as the next frontier while customers are demanding Powersoft amplifiers for being really able to save energy preserving sound quality.
The following images show PFC at work: a constant current request without huge peaks and harmful generation of harmonics able to perturb the mains.

Note that mains RMS and Peak currents on the amplifier without PFC are respectively 1.5 and 2 times larger than on the Powersoft amplifier with PFC even if the two amplifiers have the same output power level. Also, the instantaneous power and the average power are considerably higher.
Here summarized are the advantages related to the use of the PFC in Powersoft amplifiers:


  • Stable performances and independent from the mains (very useful in countries where the mains quality is below standards)
  • Highest Power Density
  • Lighter Weight
  • Higher Reliability
  • Reduced circuit components stress by supplying well-regulated DC
  • World Wide Range Operation (from 90 to 265 Vac, 50/60 Hz)
  • Higher Efficiency
  • Lower power request reduces copper losses of the electrical service
  • Significant reduction in required electrical supply capacity
  • Significant saving of energy cost
  • Cooler operation for a reduced air conditioning necessities in fixed installations

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