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Overload protection device, overload protection method and usb interface

A technology of USB interface and overload protection, applied in the field of USB interface, can solve the problems of overvoltage or overcurrent protection of external devices and burnout of external devices.

Active Publication Date: 2021-12-14
QISDA SUZHOU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing safety standard test, it is necessary to connect the USB Type-C interface to the external device, and short-circuit the detection and protection unit to perform the safety standard test. At this time, the detection and protection unit of the USB Type-C interface cannot detect the external device. Carry out overvoltage or overcurrent protection, resulting in the risk of external equipment being burned due to excessive voltage or current

Method used

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  • Overload protection device, overload protection method and usb interface
  • Overload protection device, overload protection method and usb interface
  • Overload protection device, overload protection method and usb interface

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Embodiment Construction

[0019] In order to have a further understanding of the purpose, structure, features and functions of the present invention, the detailed description is as follows in conjunction with the embodiments.

[0020] Such as figure 1 as shown, figure 1 It is a structural schematic block diagram of the first embodiment of the overload protection device 100 for the USB interface of the present invention. The overload protection device 100 of the present invention is arranged on the USB interface and used in conjunction with an external device 200. The overload protection device 100 includes a first The voltage conversion unit 110, the first detection protection unit 120, the second detection protection unit 130 and the fault detection and control unit 140, the second detection protection unit 130 is arranged on the first voltage conversion unit 110 and the first detection protection unit On the line between the units 120, the fault detection and control unit 140 is respectively coupled...

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Abstract

The present invention provides an overload protection device, an overload protection method, and a USB interface. The overload protection device includes a first voltage conversion unit, a first detection protection unit, a second detection protection unit, and a fault detection and control unit. The detection and protection unit is arranged on the line between the first voltage conversion unit and the first detection and protection unit, and the fault detection and control unit is respectively coupled with the first detection and protection unit and the second detection and protection unit to obtain the first The working status signal of the detection protection unit is detected, and the second detection protection unit is controlled according to the working status signal. The overload protection device, overload protection method and USB interface of the present invention can still prevent excessive voltage or current output to the external equipment when the USB interface is connected to the external equipment and the safety standard test is performed, thereby protecting the external equipment.

Description

technical field [0001] The invention relates to the field of USB interfaces, in particular to an overload protection device, an overload protection method and a USB interface. Background technique [0002] With the development of technology, the application of USB Type-C interface is becoming more and more popular. Since the PD (Power delivery) function provided by the USB Type-C interface can provide a larger output power, it is necessary to use the internal circuit of the USB Type-C interface A detection and protection unit is set in to limit the output voltage or output current of the USB Type-C interface. In the existing safety standard test, it is necessary to connect the USB Type-C interface to the external device, and short-circuit the detection and protection unit to perform the safety standard test. At this time, the detection and protection unit of the USB Type-C interface cannot detect the external device. Carry out overvoltage or overcurrent protection, resultin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/02H02H9/04
CPCH02H9/02H02H9/04
Inventor 陈钧玮阙锦盛陈衍坚
Owner QISDA SUZHOU