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USB cable control device and method with temperature limiting function

A temperature limiting and control device technology, applied in circuit devices, battery circuit devices, transportation and packaging, etc., can solve problems such as over-temperature melting of cables and potential safety hazards, and achieve the effect of avoiding over-temperature melting and improving reliability

Inactive Publication Date: 2021-03-19
HYNETEK SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in practical applications, many hosts ignore the stipulations of the USB PD protocol, and do not pre-check whether there is an electronic tag in the cable, and then broadcast a charging current to the device that may be much greater than the rated current of the cable. It is very easy to cause the cable to overheat and melt
It poses a great security risk to users

Method used

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  • USB cable control device and method with temperature limiting function
  • USB cable control device and method with temperature limiting function
  • USB cable control device and method with temperature limiting function

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Embodiment Construction

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] In the prior art, two technical solutions are used to solve the ignoring of the provisions of the USB PD protocol communication in the background art, such as figure 1 As shown, the first technical solution is a straight-through method for the USB cable, and the power supply pin VBUS at the USB male / female socket at bot...

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Abstract

The invention discloses a USB cable control device and method with temperature limitation. The device comprises two USB connectors, power supply pins VBUS and power supply grounding loop pins GND, thepower supply pins VBUS of the two USB connectors are connected through a cable, the power supply grounding loop pins GND of the two USB connectors are connected through a cable, and the two USB connectors are communicated with each other through a CC lead. The temperature condition of a hot spot area in the cable is detected in real time through a thermistor NTC, after the actually measured temperature is higher than a preset temperature, namely a measured voltage VNTC is lower than a preset voltage VOT, an over-temperature mechanism is triggered, and a Hardreset instruction is output to an external device through a PD PHY unit. Under a USB PD protocol communication mode, resetting needs to be conducted between the external device and the USB male connectors, and the USB PD protocol communication is carried out again to limit the power of the whole system, so that the cable is prevented from being melted due to over-temperature.

Description

technical field [0001] The invention belongs to the technical field of cable control, in particular to a temperature-limited USB cable control device and method. Background technique [0002] Universal Serial Bus (English: Universal Serial Bus, abbreviation: 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 personal computers and mobile devices. Information and communication products, and expanded to photographic equipment, digital TV (set-top box), game consoles and other related fields. [0003] The traditional USB is a commonly used interface. It only has 4 wires, two power and two signals. The signals are transmitted serially, and the speed can reach 480Mbps, which can meet various industrial and civilian needs. [0004] With the increasingly stringent requirements of mobile devices on transmission rate, charging power, and interface size, a new ge...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/007192H02J2207/30
Inventor 欧应阳
Owner HYNETEK SEMICON CO LTD
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