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desktop power supply
| A switched-mode power supply (switching-mode power supply, switch-mode power supply, switched power supply, switching power supply, SMPS, or switcher) is an electronic power supply that incorporates a switching regulator to convert electrical power efficiently. |
| Like other power supplies, a switching power supply transfers power from a DC or AC source to DC loads, such as a LED light, while converting voltage and current characteristics. Unlike a linear power supply, the pass transistor of a switching-mode power supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high dissipation transitions, which minimizes wasted energy. A hypothetical ideal switched-mode power supply dissipates no power. Voltage regulation is achieved by varying the ratio of on-to-off time. In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. This higher power conversion efficiency, or high efficiency, is an important advantage of a switched-mode power supply. |
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