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AN-6206
Primary-Side Synchronous Rectifier (SR) Trigger Solution for Dual-Forward Converter
Introduction
In any switching converter, rectifier diodes are used to obtain DC output
voltage.
The conduction loss of diode rectifier contributes significantly to the overall power losses in a power supply; especially in low output
voltage applications, such as personal computer (PC) power supplies.
The conduction loss of a rectifier is proportional to the product of its forward-
voltage drop and the forward conduction current.
Using synchronous rectification (SR) where the rectifier diode is replaced by
MOSFET with proper on resistance (RdsON), the forward-
voltage drop of a syn...