Surge protection device and method, and a mobile terminal

Abstract

The invention discloses a surge protection device and method and a mobile terminal, and relates to the field of the electronics. The device comprises a transient voltage suppression diode and an overvoltage protection chip, wherein one end of the transient voltage suppression diode is connected with a common port of the overvoltage protection chip and an interface needing the surge protection, and the other end of the transient voltage suppression diode is grounded; the other end of the overvoltage protection chip is connected with a chip needing the surge protection. The transient voltage suppression diode and the overvoltage protection chip are used for performing dual protection on the possible surge, the high-protection capability requirement on the transient voltage suppression diode is lowered, the manufacturing difficulty and cost of the transient voltage suppression diode is lowered, so that the volume of the transient voltage suppression diode is reduced, the space burden of the a circuit board of the chip needing the surge protection is relieved, and the surge protection effect is improved.

Description

technical field [0001] The present disclosure relates to the field of electronics, and in particular to a surge protection device and method and a mobile terminal. Background technique [0002] In the related art, in order to prevent damage to the electronic equipment caused by the surge that may occur when the electronic equipment is being charged, a TVS diode is usually connected to the charging interface of the electronic equipment. Due to the high-voltage conduction performance of the TVS diode, When a surge occurs, the surge voltage can be reduced to protect electronic equipment. However, if the TVS diode is used alone to protect electronic equipment, the requirements for the diode chip will be relatively high, not only requiring it to have a higher reverse withstand voltage capability, but also requiring it to have a lower clamping voltage capability, so This increases the difficulty and cost of making the chip, and at the same time increases the volume of the diode c...

AI Technical Summary

Problems solved by technology

However, if the TVS diode is used alone to protect electronic equipment, the requirements for the diode chip will be relatively high, not only requiring it to have a higher reverse withstand voltage capability, but also requiring it to have a lower clamping voltage capability, so This increases the difficulty and cost of making the chip, and at the same time leads to an increase in the size of the diode chip, which increases the burden on the internal circuit board of the electronic device.

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