| 摘要 |
A power supply for a bus interface is provided. The power supply comprises: an input terminal; an output terminal; a fuse providing over-current protection; a diode providing over-voltage protection, a reverse breakdown voltage of the diode not less than a maximal voltage difference of the output terminal and the input terminal, the diode connected to the fuse in series between an input terminal and an output terminal; and a plurality of capacitors filtering noise, one end of each of the capacitors connected to a node between the fuse and an anode of the diode, and another end of each of the capacitors is grounded. The power supply can provide effective over-voltage protection because a reverse breakdown voltage of the diode is not less than a maximal voltage difference of the output terminal and the input terminal. In addition, the power supply has a low cost of manufacture.
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