http://electronics360.globalspec.com/article/6730/critical-components-behind-switch-mode-power-supplies
The job of passive components in the input circuit of a power supply is to protect the electronic device from overcurrent and overvoltage and ensure electromagnetic compatibility—especially important considerations in today’s portable applications where long battery life is a necessity.
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The job of passive components in the input circuit of a power supply is to protect the electronic device from overcurrent and overvoltage and ensure electromagnetic compatibility—especially important considerations in today’s portable applications where long battery life is a necessity.
...
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