| 摘要 |
PURPOSE: A power connection device having a USB port for an electric charging is provided to charge a battery of portable equipment with the electricity at any where by carrying out a cable for an electric charging. CONSTITUTION: A voltage transmission(110) drops a common alternating current of a high voltage. A rectifying circuit(120) converts the alternating voltage into a direct voltage. A filter circuit(130) smoothly filters the voltage rectified by the rectifying circuit. A constant voltage circuit(140) provides the filtered alternating voltage as a stabilized charging voltage. A USB(Universal Serial Bus) port(150) provides the stabilized charging voltage output from the constant voltage circuit to an external USB terminal(212).
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