5. Efficiency and cooling
5.1 Efficiency and power dissipation
By definition, efficiency is the ratio of output power to input power:
The efficiency of a power supply is a very important parameter, as it determines the power dissipated in heat by the power supply, and therefore its temperature rise and MTBF.
Figure 17 shows the power loss diagrams:
Pdissipated = Pinput– Poutput
Pdissipated = Poutput ×
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