MOSFETs: Increased Efficiency In Bridge Rectifiers

Sevel, Billy
June 2007
EDN;6/7/2007, Vol. 52 Issue 12, Special section p21
Trade Publication
Case Study
The article describes the case of increasing efficiency in bridge rectifiers. The metal oxide semiconductor field-effect transistors (MOSFET) approach could increase efficiency in many applications. Higher voltage FET like 60-100 volts used in a bridge rectifier circuit could significantly enhance power savings. Comparison of different approaches show that using the MOSFET approach results in over a half Watt of power savings, which is 98% more efficient that the standard diode bridge rectifier solution. Another potential application for the approach is reverse-polarity protection for a battery circuit. The MOSFET approach can be used as a flexible, inexpensive and efficient alternative to the bridge rectifier.


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