Power Factor Correction (PFC)
PFC allows the power supply to reach high efficiency. There are two main types of PFC and Passive PFC is Active PFC. All power supplies are manufactured at present are in one of these two categories.
- Active PFC: This is the most effective type. It uses circuitry to automatically adjust power use efficiency can reach 95% (in theory). In addition, Active PFC is also capable of reducing noise and power line alignment to (allow you to plug into any 110V to 220V outlet without regular pay attention to the index). However, due to the complex architecture of Active PFC power supply to the technologies used are quite high prices. Active PFC power supplies Some still allow users to use transfer switch determines the input current.
- Passive PFC: This is the most common type available today. Unlike Active PFC, PFC Passive alignment of electric current through the filter capacitor and thus its ability to work will change over time as well as considerable influences from external factors such as temperature, concussion ... the use of technology resources Passive PFC requires the user to adjust the input voltage via a small switch. Sources cheaper Passive PFC Active PFC source.
The source type does not use PFC (Non PFC) are now recommended not to use. In some EU countries, all power supplies to the market are required to have either fitted or Passive PFC Active PFC. PFC allows save electricity use, reduce capacity for the power lines in the home: this is very useful when you establish computer labs or use the same power plant. Active PFC power supplies typically form a stable power line than Passive PFC, so that the device in the machine stable performance and longer life.
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