USB type power supply protector

Abstract

The utility model provides a USB type power supply protector. Comprising a shell and a PCB. The PCB comprises a USB protection board, a USB male seat input and a USB female seat output; the input of the USB male seat is welded at one end of the USB protection plate, and the output of the USB female seat is welded at the other end of the USB protection plate; a grounding wire pin of the USB male seat input is connected with a grounding wire pin of the USB female seat output; and the shell is arranged outside the USB protection plate and is used for protecting the USB protection plate. According to the utility model, low clamping voltage can still be maintained when the circuit is attacked by high-energy ESD, and the situation that the protection assembly is not damaged but the internal circuit of the system cannot work normally or even is damaged is avoided. According to the utility model, the ESD protection requirements of all signal lines / power lines in the USB connection port can be met, the complexity of the design layout is greatly reduced, the cost is reduced, and the ESD protection device is convenient to carry and use.

Description

Technical Field

[0001] The utility model relates to the technical field of ESD protection, and particularly relates to a USB type power protector. Background Technique

[0002] With the rapid development of electronic technology, integrated circuits (ICs) and electronic devices are becoming more and more popular and widely used in daily life. However, these electronic devices face a common threat during the processes of manufacturing, transportation, use and storage - electrostatic discharge (ESD). ESD is a transient and intense current discharge phenomenon, usually caused by the charge transfer between objects. The harm of ESD to electronic devices cannot be underestimated. First of all, the voltage pulse generated by ESD may far exceed the tolerance range of electronic components, resulting in component damage or performance degradation. Secondly, ESD will also generate heat inside the device, which may cause serious accidents such as fire or explosion. In addition, ESD will also have a long-term impact on the reliability and stability of the device, reducing its service life. In order to protect electronic devices from the damage of ESD and improve the reliability and stability of the devices, ESD protection technology has emerged as the times require.

[0003] The current ESD protection technology mainly focuses on power protection, and basically uses a daughter board or a module of the product itself as the protector. The current ESD protection technology has problems such as product abnormality when damaged, difficulty in generalization, single object, and inability to work directly on the USB interface. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a USB type power protector to solve the problems existing in the background technique.

[0005] Based on the above purpose, the utility model provides a USB type power protector, including: a housing and a PCB board;

[0006] The PCB board includes: a USB protection board, a USB male socket input and a USB female socket output; the USB male socket input is welded to one end of the USB protection board, and the USB female socket output is welded to the other end of the USB protection board; the power line pins of the USB male socket input and the power line pins of the USB female socket output are connected;

[0007] The housing is arranged outside the USB protection board to protect the USB protection board.

[0008] In one embodiment, the USB protection board includes: a circuit board, an LED lamp, a resistor R1, a self - reset fuse F1, a TVS tube D1 and a TVS tube D2;

[0009] The LED lamp, the resistor R1, the resettable fuse F1 / the TVS tube D1 and the TVS tube D2 are welded on the circuit board;

[0010] One end of the LED lamp is connected to the ground wire pin of the USB male socket input, and the other end of the LED lamp is connected to one end of the resistor R1; the other end of the resistor R1 is connected to the power line pin output by the USB female socket; the first port of the resettable fuse F1 is connected to one end of the TVS tube D1, and the second port of the resettable fuse F1 is connected to the power line pin output by the USB female socket; one end of the TVS tube D1 is connected to the power line pin output by the USB female socket, and the other end of the TVS tube D1 is connected to the power line pin output by the USB female socket. The male socket input ground wire pin is connected; the 3rd pin of the TVS tube D2 is grounded, the 4th pin of the TVS tube D2 is connected to the positive data line pin of the USB male socket input, the 5th pin of the TVS tube D2 is connected to the negative data line pin of the USB male socket input, the 6th pin of the TVS tube D2 is connected to the negative data line pin of the USB female socket output, the 7th pin of the TVS tube D2 is connected to the positive data line pin of the USB female socket output, and the 8th pin of the TVS tube D2 is connected to the ground wire pin of the USB female socket output.

[0011] In one of the embodiments, it also includes: a first solder pin of the USB male socket input is connected to a first solder pin of the USB female socket output.

[0012] From the above description, it can be seen that the USB power protector provided by the utility model has very small leakage current, which helps to reduce energy consumption and improve the energy efficiency of the device, can withstand higher voltage shocks, and provide better protection. It provides a low enough clamping voltage during ESD events to avoid transmission data errors or omissions, and even damage to the internal circuits of system products.

[0013] The on-resistance after the action is low enough to maintain a low clamping voltage when subjected to a high-energy ESD attack, avoiding the situation where the protection components are not damaged but the internal circuits of the system cannot work normally or are even damaged.

[0014] A single chip can solve the ESD protection requirements of all signal lines / power lines in the USB connection port, greatly reducing the complexity of the design layout, reducing costs, and being easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 Schematic diagram of the PCB board structure in the embodiment of the present invention;

[0017] Figure 2 Schematic connection diagram of the PCB board in the embodiment of the present invention. Specific embodiments

[0018] To make the purpose, technical solutions and advantages of the present invention more clear and understandable, the following further details the present invention in combination with specific embodiments and with reference to the accompanying drawings.

[0019] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0020] The present invention provides a USB - type power protector, including: a housing and a PCB board;

[0021] The PCB board includes: a USB protection board, a USB male socket input, and a USB female socket output; the USB male socket input is welded to one end of the USB protection board, and the USB female socket output is welded to the other end of the USB protection board; the power line pins of the USB male socket input and the power line pins of the USB female socket output are connected;

[0022] The housing is arranged outside the USB protection board to protect the USB protection board, and the housing is a market standard part.

[0023] Such as Figure 1As shown in the figure, the USB protection board includes: a circuit board, an LED lamp, a resistor R1, a self - resetting fuse F1, a TVS diode D1, and a TVS diode D2;

[0024] The USB protection board is made according to the Gerber and circuit diagram. The specific circuit diagram is as Figure 2 shown. The MH1 port and MH2 port input by the USB male connector are connected to the EH port output by the USB female connector. The 4th port and the 7th port of the TVS diode D2 are connected, and the 5th port and the 6th port of the TVS diode D2 are connected.

[0025] The LED lamp, resistor R1, self - resetting fuse F1, TVS diode D1, and TVS diode D2 are soldered on the circuit board;

[0026] One end of the LED lamp is connected to the ground wire pin of the USB male connector input (the 4th port of USB1), and the other end of the LED lamp is connected to one end of the resistor R1; the other end of the resistor R1 is connected to the power supply wire pin of the USB female connector output (the 1st port of USB2); the 1st port of the self - resetting fuse F1 is connected to one end of the TVS diode D1, and the 2nd port of the self - resetting fuse F1 is connected to the power supply wire pin of the USB female connector output (the 1st port of USB2); one end of the TVS diode D1 is connected to the power supply wire pin of the USB female connector output (the 1st port of USB2), and the other end of the TVS diode D1 is connected to the ground wire pin of the USB male connector input (the 4th port of USB1); the 3rd pin of the TVS diode D2 is grounded, the 4th pin of the TVS diode D2 is connected to the positive data line pin of the USB male connector input (the 3rd port of USB1), the 5th pin of the TVS diode D2 is connected to the negative data line pin of the USB male connector input (the 2nd port of USB1), the 6th pin of the TVS diode D2 is connected to the negative data line pin of the USB female connector output (the 2nd port of USB2), the 7th pin of the TVS diode D2 is connected to the positive data line pin of the USB female connector output (the 3rd port of USB2), and the 8th pin of the TVS diode D2 is connected to the ground wire pin of the USB female connector output (the 4th port of USB2).

[0027] The self - resetting fuse F1 prevents over - current protection, the TVS diode D1 prevents over - voltage protection, the resistor R1 can limit the current and provide protection for the LED component. The brightness of the LED lamp can confirm that the product is powered and in a normal working state. The TVS diode D2 protects the signal pins of the USB male connector input (USB1) and the USB female connector output (USB2).

[0028] The USB power protector provided in this embodiment, during use, the USB male socket is plugged into the USB interface of the computer, the USB female socket is plugged into the product test position, the power path, and when the TVS tube D1 detects that the voltage exceeds the required voltage, it will intercept the exceeding part, thereby playing a role in voltage stabilization, and the fuse of the self-recovery fuse F1 will intercept the overcurrent part to stabilize the power, and further through the resistor R1, the resistor will further limit the current, through the LED lamp, to reach the product, effectively eliminating the overvoltage and overcurrent in the process; TVS tube D2 is arranged on the signal pin circuit to stabilize the overvoltage of the signal pin. In this way, the entire determination initiation circuit is free of overvoltage and overcurrent.

[0029] The utility model provides a USB power protector with very small leakage current, which helps to reduce energy consumption and improve the energy efficiency of the device, can withstand higher voltage shocks, and provide better protection. It provides a low enough clamping voltage during ESD events to avoid transmission data errors or omissions, and even damage to the internal circuits of system products.

[0030] The on-resistance after the action is low enough to maintain a low clamping voltage when subjected to a high-energy ESD attack, avoiding the situation where the protection components are not damaged but the internal circuits of the system cannot work normally or are even damaged.

[0031] A single chip can solve the ESD protection requirements of all signal lines / power lines in the USB connection port, greatly reducing the complexity of the design layout, reducing costs, and being easy to carry.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0033] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A USB power protector, characterized in that: include: Housing and PCB board; The PCB board comprises: a USB protection board, a USB male input and a USB female output; the USB male input is welded to one end of the USB protection board, and the USB female output is welded to the other end of the USB protection board; the ground wire pin of the USB male input is connected to the ground wire pin of the USB female output; The shell is arranged outside the USB protection board to protect the USB protection board.

2. A USB power protector according to claim 1, characterized in that: The USB protection board includes: a circuit board, an LED lamp, a resistor R1, a resettable fuse F1, a TVS tube D1 and a TVS tube D2; The LED lamp, the resistor R1, the resettable fuse F1, the TVS tube D1 and the TVS tube D2 are welded on the circuit board; One end of the LED lamp is connected to the ground wire pin of the USB male socket input, and the other end of the LED lamp is connected to one end of the resistor R1; the other end of the resistor R1 is connected to the power line pin output by the USB female socket; the first port of the resettable fuse F1 is connected to one end of the TVS tube D1, and the second port of the resettable fuse F1 is connected to the power line pin output by the USB female socket; one end of the TVS tube D1 is connected to the power line pin output by the USB female socket, and the other end of the TVS tube D1 is connected to the power line pin output by the USB female socket. The male socket input ground wire pin is connected; the 3rd pin of the TVS tube D2 is grounded, the 4th pin of the TVS tube D2 is connected to the positive data line pin of the USB male socket input, the 5th pin of the TVS tube D2 is connected to the negative data line pin of the USB male socket input, the 6th pin of the TVS tube D2 is connected to the negative data line pin of the USB female socket output, the 7th pin of the TVS tube D2 is connected to the positive data line pin of the USB female socket output, and the 8th pin of the TVS tube D2 is connected to the ground wire pin of the USB female socket output.

3. A USB power protector according to claim 1, characterized in that: Also includes: The first solder pin of the USB male socket input is connected to the first solder pin of the USB female socket output.

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