Lightning protection USB flash disk

Abstract

The invention discloses a lightning protection USB flash disk. The lightning protection USB flash disk comprises a USB interface, wherein the USB interface is connected with a lightning protection circuit, which comprises a diode D2, a diode D3, a voltage stabilizing diode D4, a resistor R4 and a field-effect transistor; the positive pole of the diode D2 is connected to the negative pole of the diode D3; the negative poles of the diode D2 and the voltage stabilizing diode D4 are mutually connected and are simultaneously connected to a VDD (Voltage Drain Drain); the positive poles of the diode D3 and the voltage stabilizing diode D4 are mutually connected and are simultaneously grounded; one end of the resistor R4 is connected with the positive pole of the diode D2, and the other end of the resistor R4 is connected to the drain electrode of the field-effect transistor; and the gate electrode and the source electrode of the field-effect transistor are mutually connected and are simultaneously grounded. The lightning protection USB flash disk has the advantages that as the lightning protection circuit is connected to the USB interface of the USB flash disk, the USB flash disk has a lightning protection function, and the circuit structure is simple and can be conveniently integrated into the USB flash disk without causing burden to the cost of the USB flash disk.

Description

technical field [0001] The present invention relates to a U disk, more specifically relates to a U disk capable of lightning protection. Background technique [0002] As a tool for people to store photos, materials, image storage or data exchange, U disk is becoming more and more important. Due to the small size of the USB flash drive, its internal circuit is not easy to be too complicated, so the general USB flash drive does not have the lightning protection function. Usually, although lightning will not pose a threat to the U disk, because the U disk is directly connected to the computer or other electronic devices through the USB interface, if the U disk is forgotten to be unplugged after use, it is easily attacked by lightning, especially In the summer thunderstorm season. When lightning damages the internal circuit of the U disk, the data stored in the U disk cannot be found or lost, which brings certain economic losses to people, especially for those U disks that sto...

AI Technical Summary

Problems solved by technology

Due to the small size of the U disk, its internal circuit is not easy to be too complicated, so the general U disk does not have the lightning protection function.

Usually, although lightning will not pose a threat to the U disk, because the U disk is directly connected to the computer or other electronic devices through the USB interface, if the U disk is forgotten to be unplugged after use, it is easily attacked by lightning, especially During the summer thunderstorm season

When the lightning damages the internal circuit of the U disk, the data stored in the U disk cannot be found or lost, which brings certain economic losses, especially for those U disks that store important data.

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