| 摘要 |
A driving system and a driving method for a portable 3.5 inch external hard disk are disclosed. The driving system includes a first power supply module, a second power supply module and the portable 3.5 inch external hard disk. The first power supply module installed in the portable 3.5 inch external hard disk includes a first voltage source having a first output voltage supplies power to a main circuit. The second power supply module includes a second voltage source outputting a first voltage and a second voltage through a first interface output port and a second interface output port, respectively, which are combined to form a second output voltage to supply power to a boost circuit. The boost circuit then outputs a working current to provide to a start circuit, which replaces the first power supply module and hence maintains operation of the external hard disk.
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