Freewheeling diode or synchronous MOSFET used in buck converters for energy recirculation and efficiency optimization.
In buck converter circuits, the freewheeling diode (or synchronous MOSFET in synchronous designs) provides a path for inductor current during the switch-off period, preventing voltage spikes and enabling continuous current flow. This component is critical for energy recirculation, reducing switching losses, and improving overall converter efficiency.
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A freewheeling diode is a passive component that conducts when forward-biased, while a synchronous MOSFET is an active switch that replaces the diode to reduce conduction losses through lower voltage drop.
It provides a current path during the switch-off period, preventing high voltage spikes, enabling continuous inductor current, and improving efficiency by recirculating stored energy.
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