Overtemperature protection circuit and data line having the same

Abstract

The invention discloses an overtemperature protection circuit and a data line, wherein the temperature sensing module outputs a sensing voltage according to the ambient temperature, a first path terminal of the first switching element receives an input voltage, a first control terminal of the first switching element receives the induced voltage, a second via terminal of the first switching elementis connected to the ground wire through a first resistor, the third via terminal and the fourth via terminal of the second switching element are both connected to the ground wire, a second control terminal of the second switching element is connected to a second via terminal of the first switching element, when the ambient temperature of the temperature sensing module is lower than the sensed temperature of the temperature sensing module, the induced voltage output from the temperature sensing module turns on the first switching element to control the second switching element to turn on, Whenthe ambient temperature of the temperature sensing module is higher than or equal to the sensed temperature of the temperature sensing module, the sensed voltage output by the temperature sensing module causes the first switching element to be turned off to control the second switching element to be turned off, thereby disconnecting the circuit to prevent overheating of the device.

Description

technical field [0001] The invention relates to the technical field of data lines, in particular to an over-temperature protection circuit and a data line having the same. Background technique [0002] Universal Serial Bus (Universal Serial Bus, USB) is a serial bus standard that connects computer systems and external devices. It is also a technical specification for input and output interfaces. It is widely used in information communication products such as personal computers and mobile devices. And extended to photographic equipment, digital TV (set-top box), game consoles and other related fields. Among them, the USB Type-C interface is a gradually popular USB interface. With the popularity of the USB Type-C interface, more and more devices need to support the USB Type-C protocol. The USB Type-C interface is usually located at the bottom of the smartphone. , most of the time it is used for charging, data transmission, etc. Its biggest feature is that it supports the "fro...

AI Technical Summary

Problems solved by technology

[0003] At present, the data cable of the USB Type-C interface only adds a positive temperature coefficient thermistor (Positive Temperature Coefficient, PTC) to the VBUS channel of the output end. The protection temperature is at least above 100°C for 1-2 minutes, so that the use of PTC cannot effectively prevent the Type-C interface from being burned due to excessive temperature, which brings troubles to users

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