Voltage backflow detection circuit and interface adapter plate

Abstract

The utility model provides a voltage backward flow detection circuit and an interface adapter plate, the detection circuit comprises a first adapter, a second adapter, a third adapter, an MOS tube and an LED diode, the G, S and D poles of the MOS tube are respectively connected with a first line, a second line and a third line, and the second line and the third line are both grounded; a power supply pin of the first adapter and a power supply pin of the second adapter are connected with the first line through a fourth line and a fifth line respectively; the LED is arranged on the third circuit, the positive electrode of the LED is connected with the MOS tube, the third circuit on one side of the positive electrode of the LED is connected with a sixth circuit, and the sixth circuit is connected with a power supply pin of the third adapter. When the first adapter interface and the second adapter interface have backward-flowing voltage, the G pole of the MOS tube outputs high level to be conducted, the LED does not work, and whether voltage backward flowing exists in equipment connected with the first adapter interface and the second adapter interface or not can be judged through on and off of the LED.

Description

Technical Field

[0001] The utility model relates to the technical field of backflow voltage detection, and particularly relates to a voltage backflow detection circuit and an interface adapter board. Background Art

[0002] With the increasing popularity of electronic devices, computers, as important tools for work and entertainment, their stability and security have received extensive attention. In actual use, due to problems with the power cords or adapters of external products (such as interface adapter boards), the situation of backflow voltage may occur, which may not only damage computer hardware but also cause safety accidents. Therefore, how to effectively detect and prevent backflow voltage has become a problem worthy of research. Summary of the Utility Model

[0003] The utility model provides a voltage backflow detection circuit and an interface adapter board, aiming to solve the technical problems mentioned in the background art existing in the prior art eyepiece.

[0004] The technical solution of the utility model is as follows:

[0005] In the first aspect of the utility model, a voltage backflow detection circuit is provided, including a first adapter, a second adapter, a third adapter, an MOS transistor, and an LED diode. The G pole, S pole, and D pole of the MOS transistor are respectively connected with a first circuit, a second circuit, and a third circuit. Both the second circuit and the third circuit are grounded; the power supply pins of the first adapter and the second adapter are respectively connected to the first circuit through a fourth circuit and a fifth circuit; the LED diode is arranged on the third circuit, and the positive pole of the LED diode is connected to the MOS transistor. A sixth circuit is connected to the third circuit on the side of the positive pole of the LED diode, and the sixth circuit is connected to the power supply pin of the third adapter.

[0006] In an optional implementation manner of the first aspect of the utility model, a first resistor is arranged on the first circuit, a second resistor is arranged on the sixth circuit, and a third resistor is arranged on the third circuit on the side of the negative pole of the LED diode.

[0007] In an optional implementation manner of the first aspect of the utility model, the resistance value of the first resistor is 10R, the resistance value of the second resistor is 5.1K, and the resistance value of the third resistor is 4.7K.

[0008] In an optional implementation manner of the first aspect of the utility model, both the first adapter and the third adapter are TYPE-C / F interfaces; the second adapter is a UAA1112C-4HK1 interface.

[0009] In an alternative embodiment of the first aspect of the present utility model, the CC1 pin of the first adapter is connected to a fourth resistor and grounded, and the CC2 pin of the first adapter is connected to a fifth resistor and grounded.

[0010] In an alternative embodiment of the first aspect of the present utility model, the CC1 pin of the third adapter is connected to a sixth resistor and grounded, and the CC2 pin of the first adapter is connected to a seventh resistor and grounded.

[0011] In an alternative embodiment of the first aspect of the present utility model, the resistance values of the fourth resistor, the fifth resistor, the sixth resistor, and the seventh resistor are all 5.1K.

[0012] The second aspect of the present utility model provides an interface adapter board, including the voltage backflow detection circuit according to any one of the above first aspects.

[0013] The beneficial effects are as follows: The present utility model provides a voltage backflow detection circuit and an interface adapter board. The detection circuit includes a first adapter, a second adapter, a third adapter, a MOS transistor, and an LED diode. The G, S, and D poles of the MOS transistor are respectively connected to a first circuit, a second circuit, and a third circuit, and both the second circuit and the third circuit are grounded; the power supply pins of the first adapter and the second adapter are respectively connected to the first circuit through a fourth circuit and a fifth circuit; the LED diode is arranged on the third circuit and the positive electrode of the LED diode is connected to the MOS transistor, and a sixth circuit is connected to the third circuit on the positive electrode side of the LED diode, and the sixth circuit is further connected to the power supply pin of the third adapter. When there is a backflow voltage at the first adapter and the second adapter of the present utility model, the G pole of the MOS transistor outputs a high level and conducts, and the LED diode does not work. The present utility model can judge whether there is voltage backflow in the devices connected to the first adapter and the second adapter through the lighting and extinguishing of the LED diode. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the composition of a voltage backflow detection circuit of the present utility model.

[0015] The reference numerals in the figure are as follows:

[0016] 10 - First adapter; 20 - Second adapter; 30 - Third adapter; 40 - MOS transistor; 50 - LED diode; 60 - First circuit; 70 - Second circuit; 80 - Third circuit; 90 - Fourth circuit; 100 - Fifth circuit; 110 - Sixth circuit; 120 - First resistor; 130 - Second resistor; 140 - Third resistor; 150 - Fourth resistor; 160 - Fifth resistor; 170 - Sixth resistor; 180 - Seventh resistor. Detailed Embodiments

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the following further details the present application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0018] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application.

[0019] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0020] Throughout the specification, reference to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the phrases "in one embodiment" or "in some embodiments" appearing throughout the specification do not all refer to the same embodiment. In addition, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0021] See Figure 1 , the present utility model provides a voltage backflow detection circuit, including a first adapter 10, a second adapter 20, a third adapter 30, a MOS transistor 40, and an LED diode 50. Exemplarily, in an optional implementation manner of the present utility model, both the first adapter 10 and the third adapter 30 are TYPE-C / F interfaces; the second adapter 20 is a UAA1112C-4HK1 interface.

[0022] See Figure 1, the G pole, S pole, and D pole of the MOS transistor 40 are respectively connected to a first circuit 60, a second circuit 70, and a third circuit 80, and both the second circuit 70 and the third circuit 80 are grounded; the power supply pin (shown as the VCC pin) of the first adapter 10 and the power supply pin (shown as the VBUS pin) of the second adapter 20 are respectively connected to the first circuit 60 through a fourth circuit 90 and a fifth circuit 100; the LED diode 50 is arranged on the third circuit 80 and the positive electrode of the LED diode 50 is connected to the MOS transistor, and a sixth circuit 110 is connected to the third circuit 80 on the side of the positive electrode of the LED diode 50, and the sixth circuit 110 is connected to the power supply pin (shown as the VCC pin) of the third adapter 30.

[0023] See Figure 1 , in an optional implementation manner of the present utility model, a first resistor 120 is arranged on the first circuit 60, a second resistor 130 is arranged on the sixth circuit 110, and a third resistor 140 is arranged on the third circuit 80 on the side of the negative electrode of the LED diode 50. In the present utility model, the first resistor 120, the second resistor 130, and the third resistor 140 are used to match the voltage at both ends of the G pole and D pole of the MOS transistor 40, and the resistance values of the first resistor 120, the second resistor 130, and the third resistor 140 can be set according to actual situations. Exemplarily, in an optional implementation scenario of the present utility model, the resistance value of the first resistor 120 is 10R, the resistance value of the second resistor 130 is 5.1K, and the resistance value of the third resistor 140 is 4.7K.

[0024] See Figure 1 , in an optional implementation manner of the present utility model, the CC1 pin of the first adapter 10 is connected to a fourth resistor 150 and grounded, and the CC2 pin of the first adapter 10 is connected to a fifth resistor 160 and grounded. The CC1 pin of the third adapter 30 is connected to a sixth resistor 170 and grounded, and the CC2 pin of the first adapter 30 is connected to a seventh resistor 180 and grounded.

[0025] See Figure 1 , in an optional implementation manner of the present utility model, the resistance values of the fourth resistor 150, the fifth resistor 160, the sixth resistor 170, and the seventh resistor 180 are the same. The resistance values of the fourth resistor 150, the fifth resistor 160, the sixth resistor 170, and the seventh resistor 180 are all 5.1K.

[0026] The second aspect of the present utility model provides an interface adapter board, including the voltage backflow detection circuit according to any one of the above first aspects.

[0027] In summary, the present utility model provides a voltage backflow detection circuit and an interface adapter board. The detection circuit includes a first adapter, a second adapter, a third adapter, a MOS transistor, and an LED diode. The G, S, and D electrodes of the MOS transistor are respectively connected to a first line, a second line, and a third line, and both the second line and the third line are grounded; the power supply pins of the first adapter and the second adapter are respectively connected to the first line through a fourth line and a fifth line; the LED diode is arranged on the third line and the positive electrode of the LED diode is connected to the MOS transistor. A sixth line is connected to the third line on the side of the positive electrode of the LED diode, and the sixth line is further connected to the power supply pin of the third adapter. When there is a backflow voltage at the first adapter and the second adapter of the present utility model, the G electrode of the MOS transistor outputs a high level and conducts, and the LED diode does not work. The present utility model can determine whether there is voltage backflow in the devices connected to the first adapter and the second adapter through the on and off of the LED diode.

[0028] Although the present utility model has been disclosed above with preferred embodiments, the above preferred embodiments are not intended to limit the present utility model. Those of ordinary skill in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the scope defined by the claims.

Claims

1. A voltage backflow detection circuit, characterized in that: It includes a first adapter, a second adapter, a third adapter, a MOS tube and an LED diode, wherein the G pole, S pole and D pole of the MOS tube are respectively connected to the first circuit, the second circuit and the third circuit, and the second circuit and the third circuit are both grounded; the power supply pin of the first adapter and the power supply pin of the second adapter are respectively connected to the first circuit through a fourth circuit and a fifth circuit; the LED diode is arranged on the third circuit and the positive pole of the LED diode is connected to the MOS tube, the third circuit on the positive pole side of the LED diode is connected to the sixth circuit, and the sixth circuit is connected to the power supply pin of the third adapter.

2. The voltage backflow detection circuit according to claim 1, characterized in that: A first resistor is arranged on the first circuit, a second resistor is arranged on the sixth circuit, and a third resistor is arranged on the third circuit at the cathode side of the LED diode.

3. The voltage backflow detection circuit according to claim 2, characterized in that: The resistance value of the first resistor is 10R, the resistance value of the second resistor is 5.1K, and the resistance value of the third resistor is 4.7K.

4. The voltage backflow detection circuit according to claim 3, characterized in that: The first adapter and the third adapter are both TYPE-C / F interfaces; the second adapter is a UAA1112C-4HK1 interface.

5. The voltage backflow detection circuit according to claim 4, characterized in that: The CC1 pin of the first adapter is connected to a fourth resistor and grounded, and the CC2 pin of the first adapter is connected to a fifth resistor and grounded.

6. The voltage backflow detection circuit according to claim 5, characterized in that: The CC1 pin of the third adapter is connected to a sixth resistor and grounded, and the CC2 pin of the first adapter is connected to a seventh resistor and grounded.

7. The voltage backflow detection circuit according to claim 6, characterized in that: The resistance values ​​of the fourth resistor, the fifth resistor, the sixth resistor and the seventh resistor are all 5.1K.

8. An interface adapter board, characterized in that: The invention comprises the voltage backflow detection circuit as described in any one of claims 1 to 7.

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