Type-C anti-surge charging circuit

Abstract

The utility model relates to a Type-C anti-surge charging circuit, a detection line is connected with a VCONN1 pin of an electronic tag chip through a resistor R1, and the positive electrode and the negative electrode of a TVS diode D3 are respectively connected with a ground wire and the detection line; the positive electrode and the negative electrode of the TVS diode D1 are respectively connected with a ground wire and a first VCONN wire; the positive electrode and the negative electrode of the TVS diode D2 are connected with a ground wire and a second VCONN wire respectively. The SCL pin, the SDA pin and the GND pin of the electronic tag chip are connected with the ground wire. According to the utility model, the anti-surge absorption capability of the electronic tag chip is effectively improved, meanwhile, the anti-surge capability is further enhanced (the anti-surge capability needs to reach 30V), the voltage entering the electronic tag chip through the CC pin, the VCONN1 pin or the VCONN2 pin is ensured to be within the allowable rated range of the electronic tag chip, the electronic tag chip is protected, and the service life of the electronic tag chip is prolonged. And the service life of the Type-C charging male connector is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of Type-C charging circuits, and in particular to a Type-C surge protection charging circuit. Background Art

[0002] As mobile devices have increasingly stringent requirements on transmission speed, charging power, and interface size, a new generation of USB interface USB Type-C came into being.

[0003] USB Type-C, or Type-C for short, is a hardware interface specification for the Universal Serial Bus (USB). The highlights of the new version of the interface are a slimmer design, faster transmission speed (up to 80Gbps), and more powerful power transmission (up to 240W). Type-C supports double-sided insertion of the USB interface, officially solving the global problem of "USB can never be inserted correctly", and can be inserted from the front or back. At the same time, the USB data cable used with it must also be thinner and lighter.

[0004] The USB Type-C active data cable encapsulated with an electronically marked cable (E-Marker), the downstream facing port (DFP) and the upstream facing port (UFP) can read the properties of the cable using the PD charging protocol: power transmission capability, data transmission capability, ID and other information. Generally speaking, data cables with currents above 3A are required to have an E-mark chip.

[0005] The existing fast charging data cable with E-marker chip (ie electronic tag chip) needs to use a VCONN core to charge the E-mark chip alone, so generally six cores are needed. However, the existing fast charging data cable with E-marker chip has poor surge protection capability for the E-marker chip. Once a surge current occurs, the E-marker chip is easily burned, which in turn affects the normal use of the fast charging data cable.

[0006] Therefore, in the present utility model patent application, the applicant carefully studied a Type-C surge protection charging circuit to solve the above problems. Utility Model Content

[0007] The utility model aims to overcome the deficiencies of the above-mentioned prior art, and its main purpose is to provide a Type-C surge protection charging circuit, which effectively improves the surge protection absorption capability of the electronic tag chip, and at the same time, further strengthens the surge protection capability (needs to reach 30V), ensures that the voltage entering the electronic tag chip through the CC pin, VCONN1 pin or VCONN2 pin is within the rated range allowed by the electronic tag chip, protects the electronic tag chip, and is beneficial to the service life of the Type-C charging male plug.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0009] A Type-C surge protection charging circuit includes an electronic tag chip, a power line, a data transmission line, a detection line and a ground line; wherein,

[0010] The power cord is used to connect to the power terminal of the terminal block of the Type-C charging male plug;

[0011] The data transmission line is used to connect to the data terminal of the terminal block of the Type-C charging male plug;

[0012] The ground wire is used to connect to the ground terminal of the terminal block of the Type-C charging male plug;

[0013] The detection line is used to connect to the detection terminal of the terminal block of the Type-C charging male plug;

[0014] Also includes a first VCONN line, a second VCONN line, a TVS diode D1, a TVS diode D2, a TVS diode D3 and a resistor R1;

[0015] The detection line is also connected to the VCONN1 pin of the electronic tag chip through the resistor R1, and the positive and negative electrodes of the TVS diode D3 are connected to the ground line and the detection line respectively;

[0016] One end of the first VCONN line is used to connect to one of the VCONN power supply terminals of the terminal block of the Type-C charging male plug, the other end of the first VCONN line is connected to the VCONN2 pin of the electronic tag chip, and the positive and negative electrodes of the TVS diode D1 are respectively connected to the ground line and the first VCONN line;

[0017] One end of the second VCONN line is used to connect to another VCONN power supply terminal of the terminal block of the Type-C charging male connector, and the other end of the second VCONN line is connected to the CC pin of the electronic tag chip. The positive and negative poles of the TVS diode D2 are respectively connected to the ground wire and the second VCONN line, and the SCL pin, SDA pin and GND pin of the electronic tag chip are all connected to the ground wire.

[0018] As a preferred solution, a capacitor is further included, and the power line is connected to the ground line via the capacitor.

[0019] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it mainly improves the surge protection absorption capacity of the electronic tag chip through the cooperation of TVS diode D1, TVS diode D2 and TVS diode D3. At the same time, the detection line is also connected to the VCONN1 pin of the electronic tag chip through resistor R1, so as to further enhance the surge protection capability (need to reach 30V), ensure that the voltage entering the electronic tag chip through the CC pin, VCONN1 pin or VCONN2 pin is within the rated range allowed by the electronic tag chip, protect the electronic tag chip, and is beneficial to the service life of the Type-C charging male head.

[0020] In order to more clearly illustrate the structural features and effects of the present invention, it is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic circuit diagram of an embodiment of the utility model.

[0022] Description of Figure Numbers:

[0023] 10. Power cord

[0024] 20. Data transmission line

[0025] 30. Testing line

[0026] 40. Ground wire

[0027] 51. First VCONN line

[0028] 52. Second VCONN line. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0030] like Figure 1 As shown, a Type-C surge protection charging circuit includes an electronic tag chip U1, a power line 10, a data transmission line 20, a detection line 30, a ground line 40, a first VCONN line 51, a second VCONN line 52, a TVS diode D1, a TVS diode D2, a TVS diode D3, a capacitor C1 and a resistor R1; wherein,

[0031] The power line 10 is used to connect to the power terminal of the terminal block of the Type-C charging male plug; the power line 10 is connected to the ground line 40 through the capacitor C1. The ground line 40 is used to connect to the ground terminal of the terminal block of the Type-C charging male plug;

[0032] The data transmission line 20 is used to connect to the data terminal of the terminal block of the Type-C charging male plug;

[0033] The detection line 30 is used to connect to the detection terminal of the terminal block of the Type-C charging male plug. The detection line 30 is also connected to the VCONN1 pin of the electronic tag chip U1 through the resistor R1, and the positive and negative electrodes of the TVS diode D3 are respectively connected to the ground line 40 and the detection line 30;

[0034] One end of the first VCONN line 51 is used to connect to one of the VCONN power supply terminals of the terminal block of the Type-C charging male plug, and the other end of the first VCONN line 51 is connected to the VCONN2 pin of the electronic tag chip U1. The positive and negative electrodes of the TVS diode D1 are connected to the ground line 40 and the first VCONN line 51 respectively.

[0035] One end of the second VCONN line 52 is used to connect to another VCONN power supply terminal of the terminal block of the Type-C charging male connector, and the other end of the second VCONN line 52 is connected to the CC pin of the electronic tag chip U1. The positive and negative electrodes of the TVS diode D2 are respectively connected to the ground line 40 and the second VCONN line 52. The SCL pin, SDA pin and GND pin of the electronic tag chip U1 are all connected to the ground line 40.

[0036] When a surge current or electrostatic current is input, both ends of TVS diode D1, TVS diode D2 and TVS diode D3 will experience an instantaneous high-energy impact. TVS diode D1, TVS diode D2 and TVS diode D3 can change the impedance value between their two ends from high impedance to low impedance at a very high speed to absorb an instantaneous large current and clamp the voltage between its two ends to a predetermined value, thereby protecting the VCONN1 pin, VCONN2 pin and CC pin of the electronic tag chip U1 from the impact of transient high-voltage spike pulses, thereby avoiding abnormal current from rushing into the electronic tag chip U1, and effectively protecting the electronic tag chip U1.

[0037] The key point of the design of the utility model is that it mainly improves the surge absorption capacity of the electronic tag chip through the cooperation of TVS diode D1, TVS diode D2 and TVS diode D3. At the same time, the detection line is also connected to the VCONN1 pin of the electronic tag chip through resistor R1 to further enhance the surge protection capability (need to reach 30V), ensuring that the voltage entering the electronic tag chip through the CC pin, VCONN1 pin or VCONN2 pin is within the rated range allowed by the electronic tag chip, thereby protecting the electronic tag chip and facilitating the service life of the Type-C charging male connector.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A Type-C surge protection charging circuit, comprising an electronic tag chip, a power line, a data transmission line, a detection line and a ground line; wherein, The power cord is used to connect to the power terminal of the terminal block of the Type-C charging male plug; The data transmission line is used to connect to the data terminal of the terminal block of the Type-C charging male plug; The ground wire is used to connect to the ground terminal of the terminal block of the Type-C charging male plug; The detection line is used to connect to the detection terminal of the terminal block of the Type-C charging male plug; It is characterized by: further comprising a first VCONN line, a second VCONN line, a TVS diode D1, a TVS diode D2, a TVS diode D3 and a resistor R1; The detection line is also connected to the VCONN1 pin of the electronic tag chip through the resistor R1, and the positive and negative electrodes of the TVS diode D3 are connected to the ground line and the detection line respectively; One end of the first VCONN line is used to connect to one of the VCONN power supply terminals of the terminal block of the Type-C charging male plug, the other end of the first VCONN line is connected to the VCONN2 pin of the electronic tag chip, and the positive and negative electrodes of the TVS diode D1 are respectively connected to the ground line and the first VCONN line; One end of the second VCONN line is used to connect to another VCONN power supply terminal of the terminal block of the Type-C charging male connector, and the other end of the second VCONN line is connected to the CC pin of the electronic tag chip. The positive and negative poles of the TVS diode D2 are respectively connected to the ground wire and the second VCONN line, and the SCL pin, SDA pin and GND pin of the electronic tag chip are all connected to the ground wire.

2. The Type-C surge protection charging circuit according to claim 1, characterized in that: A capacitor is also included, and the power line is connected to the ground line via the capacitor.

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