FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -A power supply unit (PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. Modern personal computers universally use switched-mode power supplies. Some power supplies have a manual switch for selecting input voltage, while others automatically adapt to the mains voltage.

Detailed explanation-2: -A DC-DC converter is a type of DC power supply that utilizes DC voltage as an input. The main function of DC-DC converters is to generate regulated output voltage for electric and electronic applications. Unlike AC, DC cannot be changed from one voltage level to another (step up or step down) using a transformer.

Detailed explanation-3: -Typically, the DC voltage required is much less than the incoming AC voltage from the primary power source. Rectifier: To convert the incoming power from AC to DC, the power supply uses a rectifier, which may be half-wave, full-wave, or bridge.

Detailed explanation-4: -Transformer. This component changes (increases or decreases) the voltage of the incoming power to the necessary voltage level for the connected device. Rectifier. In AC-DC power supplies, this component converts the AC current of the incoming power to the DC format.