Synchronous Rectification for Forward Converters
In many switching power converters, rectifier diodes are used to obtain the DC output voltage. The conduction loss of a diode rectifier contributes significantly to the overall power loss, especially for low-voltage, high-current converter applications. The conduction loss of a rectifying diode is given by the product of its forward-voltage drop and forward conduction current.
By replacing the rectifier diode with a MOSFET operated as a synchronous rectifier (SR), the equivalent forward-voltage drop can be lowered and, consequently, the conduction loss can be reduced.
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Related Categories: Analog, Components, Inductors, Power, Switches, Transformers
