An LC filter (inductor and capacitor) is used to smooth the pulsed signal into a stable DC output. Primary Converter Topologies
A higher duty cycle increases the average output voltage; a lower duty cycle decreases it.
Pulse-Width Modulated (PWM) DC-DC converters are high-efficiency power electronic circuits that convert one DC voltage level to another by rapidly switching a power semiconductor (like a MOSFET) on and off. Unlike linear regulators that dissipate excess power as heat, PWM converters control the delivered to a load by adjusting the "on-time" within a fixed switching period. Core Working Principle
PWM DC-DC converters are categorized based on their ability to step voltage up or down:
Steps down a higher input voltage to a lower output voltage.
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Steps up a lower input voltage to a higher output voltage.
While the pulse width varies, the frequency typically remains constant, often in the kilohertz (kHz) to megahertz (MHz) range to minimize the size of passive components.