Professional DC-DC & AC-DC PSU / Converters

News; What is the difference between synchronous rectification and PFC

Published: Tuesday 29 March, 2016


PFC is the meaning of "power factor", which is mainly used to characterize the utilization efficiency of electronic products to electric energy. The higher the power factor, the higher the utilization efficiency of electric energy is. And synchronous rectification is a special power MOSFET with very low on state resistance, to replace the rectifier diode to reduce the rectifier loss of a new technology. It can greatly improve the efficiency of the converter and there is no dead zone caused by the Schottky barrier voltage. Power MOSFET is a voltage controlled device, which has a linear relationship with the volt ampere characteristic. Rectifier with power MOSFET, the gate voltage must be rectified voltage phase to maintain synchronization to complete the rectification, is referred to as the synchronous rectifier.
The traditional rectifier technology for dc-dc converter is similar to a fan must be vigorously pushed to open the door, so the current through this door every time we have to great efforts, a sweat, loss of nature is also a lot of.
And synchronous rectification technology is similar to the more upmarket places induction door: it seems to be closed. But you go to the front of it through, it is his own, no yourself much effort to push, so naturally, there is no loss.
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