Headphone charging data cable with switching function

Abstract

The object of the present invention is to provide an earphone charging data cable with a switching function which can transmit data, transmit audio source signals, and charge, and comprises: a first connector having a first connector side data terminal corresponding to a mobile phone side data terminal in a mobile phone interface; a second connector having a second connector side data terminal corresponding to an interface side data terminal in the data interface; a conversion chip for converting an audio source signal of a mobile phone into a driving signal for driving a sound-emitting unit, having an audio source signal input terminal and a driving signal output terminal; a switching circuit having a switching switch, wherein the switching switch is respectively connected to the audio source signal input terminal, the first connector side data terminal, and the second connector side data terminal, and is used to allow a user to switch the switching switch so that the first connector side data terminal is connected to the second connector side data terminal, or the first connector side data terminal is connected to the audio source signal input terminal.

Description

Technical Field

[0001] The invention relates to an earphone charging data cable with a switching function. Background Art

[0002] As mobile devices such as mobile phones are becoming lighter and thinner, the 3.5mm headphone jacks are gradually being removed from the mobile phones on the market. At the same time, the audio signal output function is introduced into the mobile phone interface. As a result, one interface of the mobile phone simultaneously undertakes the three functions of audio output, data transmission and charging. In order to enable the headphones to be used in such mobile phones, some existing headphones have connectors designed to be compatible with the mobile phone interface, and some audio signal-related circuits are added therein. When the headphones are connected, these circuits cooperate with the circuits in the mobile phone, so that the mobile phone recognizes the headphones and automatically switches to the audio signal output mode; when the mobile phone interface is connected to a computer via a data cable, it automatically switches to the data transmission mode.

[0003] Since different functions share the same interface, usually, the earphones cannot be used while the phone is charging. To further facilitate use, some multi-function adapter cables have appeared on the market, one end of which is an interface that matches the mobile phone connector, and the other end has two interfaces for 3.5mm earphones and charging, which can output audio signals while charging. In this type of multi-function adapter cable, the charging interface usually only has a charging function and cannot be used for data transmission. When users need to transfer data, they need to find another USB data cable to connect to the computer, which brings inconvenience in use. Summary of the invention

[0004] In order to solve the above problems, a headphone charging data cable with a switching function is provided, which can transmit data, transmit audio source signals, and charge. The present invention adopts the following technical solutions:

[0005] The present invention provides an earphone charging data cable with a switching function, characterized in that it comprises: a first connector, used to be connected to a mobile phone interface of a mobile phone, and having a first connector side data terminal corresponding to a mobile phone side data terminal in the mobile phone interface; a second connector, used to be connected to a power interface of a charging power source when the mobile phone is charging, or to be connected to a data interface of a computer when the mobile phone is transmitting data, and having a second connector side data terminal corresponding to an interface side data terminal in the data interface; a conversion chip, used to convert a sound source signal of the mobile phone into a driving signal for driving a sound-emitting unit, and having a sound source signal input terminal and a driving signal output terminal; a switching circuit, having a first transmission circuit connecting the sound source signal input terminal with the first connector side data terminal, a second transmission circuit connecting the connector side data terminal with the first connector side data terminal, and a switching switch, wherein the switching switch is respectively connected to the sound source signal input terminal, the first connector side data terminal, and the second connector side data terminal, and is used to allow a user to switch the connection relationship of the switching switch so that the first connector side data terminal is connected to the second connector side data terminal, or the first connector side data terminal is connected to the sound source signal input terminal.

[0006] The earphone charging data cable with switching function provided by the present invention may further include: at least one sound-generating unit connected to the driving signal output terminal and used for receiving the driving signal.

[0007] The earphone charging data cable with switching function provided by the present invention may further include: a microphone, and the conversion chip further has a microphone signal receiving terminal, and the microphone is connected to the microphone signal receiving terminal.

[0008] The headphone charging data cable with switching function provided by the present invention may also include: a headphone interface connected to the drive signal output terminal, and used to transmit the drive signal to the external headphone. Further, the headphone charging data cable with switching function may also include: a microphone installed at the headphone interface, and the conversion chip also has a microphone signal receiving terminal, and the microphone is connected to the microphone signal receiving terminal.

[0009] The headphone charging data cable with switching function provided by the present invention may also have such technical features, wherein the switching switch at least has a static contact connected to the first connector side data terminal and a pair of moving contacts matched with the static contact, one of the pair of moving contacts is connected to the audio source signal input terminal, and the other is connected to the second connector side data terminal. Further, the headphone charging data cable with switching function may also have such technical features, wherein the conversion chip also has a headphone detection terminal, the switching switch also has a static contact connected to the headphone detection terminal and a pair of moving contacts matched with the static contact, one of the pair of moving contacts is connected to the headphone detection terminal, and the other is connected to the ground wire.

[0010] The earphone charging data cable with switching function provided by the present invention may also include: a power supply circuit, wherein the first connector also has a first connector side power terminal that matches the power terminal in the mobile phone interface, the second connector also has a second connector side power terminal that matches the power terminal in the power interface or the data interface, the conversion chip also has a chip side power terminal for receiving power supply, the power supply circuit has a plurality of power supply nodes respectively connected to the first connector side power terminal, the second connector side power terminal and the chip side power terminal, the power supply nodes are connected in parallel through MOSFET elements, so that when the first connector is connected to the mobile phone interface and the second connector side power terminal is not connected, the current flows from the first connector side power terminal to the chip side power terminal, and when the second connector side power terminal is connected to the power supply, the current flows from the second connector side power terminal to the chip side power terminal.

[0011] Function and Effect of the Invention

[0012] According to the headphone charging data cable with a switching function provided by the present invention, since the switching circuit includes a switching switch, the switching switch can switch the connection state under the operation of the user, so that the user can connect the first connector side data terminal with the second connector side data terminal, or connect the first connector side data terminal with the audio source signal input terminal. Therefore, the headphone charging data cable with a switching function of the present invention can allow the user to manually switch the data connection state of the mobile phone, so that the mobile phone can be connected to the computer while the conversion chip can be used to output a driving signal to the sound unit according to the user's needs. That is to say, the headphone charging data cable with a switching function of the present invention can realize the charging of the mobile phone while transmitting data according to the user's choice or allowing the user to use headphones. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a diagram showing the structure of an earphone charging data cable with a switching function according to an embodiment of the present invention;

[0014] Figure 2 is a structural diagram of a first joint according to an embodiment of the present invention;

[0015] Figure 3 is a structural diagram of a second joint according to an embodiment of the present invention;

[0016] Figure 4 is a circuit structure diagram of a switching circuit according to an embodiment of the present invention;

[0017] Figure 5 FIG. 4 is a circuit structure diagram of a power supply circuit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] Hereinafter, specific implementations of the present invention will be described in detail with reference to the accompanying drawings and embodiments.

[0019] <Example>

[0020] Figure 1 1 is a structural diagram of an earphone charging data cable with a switching function according to an embodiment of the present invention.

[0021] like Figure 1 As shown, the earphone charging data cable 100 with a switching function according to an embodiment of the present invention is suitable for a Type C interface mobile phone, and includes a first connector 10, a second connector 20, a conversion chip 30, a sound unit 40, a switching circuit 50 and a power circuit 60.

[0022] Figure 2 It is a structural diagram of the first joint of an embodiment of the present invention.

[0023] like Figure 1 and Figure 2 As shown, the first connector 10 is a Type C connector, which is used to connect to the Type C interface of a mobile phone. The Type C mobile phone interface is usually provided with a mobile phone side data terminal for transmitting data signals, including data signals when connecting to a computer and audio source signals when playing music.

[0024] In this embodiment, a first connector side data terminal 11 is provided in the first connector 10, and the connector side signal terminal 11 is used to cooperate with the mobile phone side data terminal to achieve the transmission of data signals or audio source signals. Figure 2 As shown, the first connector side data terminal 11 includes two types, namely, a first connector side data terminal 11A (D-terminal) and a first connector side data terminal 11B (D+terminal).

[0025] A first connector side power terminal 12 (ie, VBUS terminal) is also provided in the first connector 10 for connecting with a power terminal in the Type C interface on the mobile phone side to achieve power transmission.

[0026] The first connector 10 is a Type C connector, which does not distinguish the insertion direction when in use. Therefore, the first connector side data terminal 11A and the first connector side data terminal 11B are each provided with a pair, and the first connector side power terminal 12 is provided with two pairs. These paired terminals are symmetrically distributed on both sides of the connector, so as to ensure that when the first connector 10 is connected to the mobile phone, it can be accurately connected no matter which direction it is inserted from. For the convenience of explanation, the wires led out of the first connector side data terminal 11A are denoted as Type C-DM, the wires led out of the first connector side data terminal 11B are denoted as Type C-DP, and the wires led out of the first connector side power terminal 12 are denoted as C-Vbus-A.

[0027] In addition, the first connector 10 of the embodiment also has a plurality of other terminals, such as a ground terminal GND, etc. The structures and functions of these terminals are the same as those of the Type C connector in the prior art, and are not described in detail here.

[0028] Figure 3 4 is a structural diagram of a second joint according to an embodiment of the present invention.

[0029] like Figure 1 and Figure 3 As shown, the second connector 20 is used to connect to a power source interface (such as a power bank) in a charging power source when the mobile phone is charged, or to connect to a data interface of a computer when data is transmitted.

[0030] In this embodiment, the second connector is a USB type connector, and accordingly, the power interface and data interface that can be connected to it are also USB type interfaces.

[0031] The second connector 20 includes a second connector-side data terminal 21 and a second connector-side power terminal 22 .

[0032] The second connector side data terminal 21 cooperates with the interface side data terminal in the computer USB interface, thereby realizing data transmission when the second connector 20 is connected to the computer. Figure 3 As shown, the second connector side data terminal 21 includes two types, namely a second connector side data terminal 21A (ie, DATA- terminal) and a second connector side data terminal 21B (ie, DATA+ terminal).

[0033] The second connector 20 is also provided with a second connector side power terminal 22 (i.e., VBUS terminal), which is used to connect with the power terminal in the power interface or the data interface to achieve power transmission. The connector side power terminal 22 can cooperate with the interface side power terminal in the power USB interface to achieve power supply. In addition, when the second connector 20 is connected to the computer USB interface, usually, the computer USB interface also has a certain power supply capacity, in which the interface side power terminal is also provided; the second connector side power terminal 22 can be connected with the interface side power terminal in the computer USB interface, so that power is supplied through the computer.

[0034] For ease of explanation, the wire led out from the second connector side data terminal 21A is denoted as USB-DM, the wire led out from the second connector side data terminal 21B is denoted as USB-DP, and the wire led out from the second connector side power terminal 22 is denoted as USB-Vbus-A.

[0035] The conversion chip 30 of this embodiment is an AU103 chip. The AU103 chip has a signal conversion function, that is, it can convert the sound source signal from the mobile phone side to form a driving signal for driving the earphone and other sound-generating components to emit corresponding sounds, and it can also convert the sound signal picked up by the external microphone to obtain the corresponding sound pickup digital signal and transmit it to the mobile phone. In addition, the AU103 chip needs to be powered when working.

[0036] like Figure 1 As shown, corresponding to the functions of the AU103 chip described above, the conversion chip 30 of this embodiment has a chip side data terminal 31 for data connection with the mobile phone side, a drive signal output terminal 32 for outputting a drive signal of a sound-generating component, a microphone signal receiving terminal 33 for receiving a microphone signal, and a chip power supply terminal 34 for receiving power supply. In this embodiment, data exchange between the conversion chip 30 and the mobile phone is carried out through the chip side data terminal 31, that is, the sound source signal (usually a digital signal) from the mobile phone side and the microphone digital signal transmitted to the mobile phone are both carried out through the chip side data terminal 31, that is, the chip side data terminal 31 is used in this embodiment as both a sound source signal input terminal for inputting the sound source signal from the mobile phone side into the chip, and as an output terminal for outputting the microphone digital signal of the chip to the sound pickup digital signal of the mobile phone.

[0037] In this embodiment, the chip-side data terminal 31 in the conversion chip 30 corresponds to the first connector-side data terminal 11 in the first connector 10, that is, there are two chip-side data terminals 31. For the convenience of description, the wires connected to the two chip-side data terminals 31 are respectively recorded as AU-DP and AU-DM. In addition, the conversion chip 30 also has an earphone detection terminal for detecting whether the earphone is connected. The wire connected to the earphone detection terminal is recorded as AU-PhoneSense. In addition, the conversion chip 30 is also connected to a clock circuit for providing a clock signal when the chip is working. The clock circuit can adopt an existing structure in the prior art, which will not be repeated here.

[0038] The sound-generating unit 40 is a pair of earphone units, which are connected to the driving signal output terminal 32, so as to emit corresponding sounds (such as playing music or playing call voice during a mobile phone call) under the driving signal output by the driving signal output terminal 32. In this embodiment, a microphone unit 41 is also integrated on the sound-generating unit 40, and the microphone unit 41 is connected to the microphone signal receiving terminal 33, so as to transmit the collected sound pickup signal to the conversion chip 30 for processing.

[0039] Figure 4 4 is a circuit structure diagram of a switching circuit according to an embodiment of the present invention.

[0040] like Figure 1 and 4 As shown, the switching circuit 50 includes a switching switch 51 (i.e., SW), which is a three-pole double-throw switch having three static contacts and moving contacts corresponding to the six static contacts respectively, wherein static contact 1 corresponds to moving contact 4 and moving contact 5, static contact 2 corresponds to moving contact 6 and moving contact 7, and static contact 3 corresponds to moving contact 8 and moving contact 9.

[0041] In this embodiment, the connection relationship of the contacts of the switch 51 is as follows:

[0042] The static contact 1 is connected to the Type C-DP via a filter circuit 52A, that is, connected to the first connector side data terminal 11B in the first connector 10, wherein the filter circuit 52A is composed of a resistor and an inductor in parallel;

[0043] The moving contact 4 is connected to the AU-DP, that is, connected to one of the chip-side data terminals 31 in the conversion chip 30;

[0044] The movable contact 5 is connected to the USB-DP, that is, connected to the second connector-side data terminal 21B in the second connector 20 .

[0045] The static contact 2 is connected to the Type C-DM via a filter circuit 52B, that is, connected to the first connector side data terminal 11A in the first connector 10, wherein the structure of the filter circuit 52B is the same as that of the filter circuit 52A, and is composed of another resistor and another inductor in parallel;

[0046] The movable contact 6 is connected to the AU-DM, that is, connected to the other one of the chip-side data terminals 31 in the conversion chip 30;

[0047] The movable contact 7 is connected to the USB-DM, that is, to the second connector side data terminal 21A in the second connector 20 .

[0048] The static contact 3 is connected to AU-PhoneSense, that is, connected to the earphone detection terminal in the conversion chip 30;

[0049] The moving contact 8 is connected to PhoneSense, which is a detection signal line derived from the sound unit 40 and provides an earphone detection signal;

[0050] The moving contact 9 is connected to PhoneSense-GND, which is a grounding wire connected to ground through a resistor.

[0051] The switch 51 has an exposed lever portion. When the user pushes the lever portion, the connection relationship between the static contact and the moving contact is switched accordingly.

[0052] For example, Figure 4 The state in which the static contact 1 is connected to the moving contact 4, the static contact 2 is connected to the moving contact 6, and the static contact 3 is connected to the static contact 8 is shown. In this state, Type C-DP is connected to AU-DP, Type C-DM is connected to AU-DM, and AU-PhoneSense is connected to PhoneSense. Correspondingly, the first connector side data terminal 11B and the first connector side data terminal 11A are respectively connected to the two chip side data terminals 31, so that the first connector 10 can transmit the data signal on the mobile phone side to the conversion chip 30. At the same time, the headphone detection terminal of the conversion chip 30 obtains the detection signal through AU-PhoneSense and PhoneSense to detect the presence of the headphone. Then, the conversion chip 30 performs a signal conversion action according to the detection signal, converts the sound source signal from the mobile phone into a driving signal to make the sound unit 40 emit a sound, or converts the sound pickup signal of the microphone 41 into a digital signal and transmits it to the mobile phone through the first connector 10; thus, the user can use the sound unit 40 to listen to the music played by the mobile phone, or use the sound unit 40 and the microphone 41 as the voice components of the mobile phone to make a voice call.

[0053] When the user pushes the lever, Figure 4 When the connection relationship in the switching switch 51 in the shown state is switched, the connection relationship of the moving contact 1 is switched from being connected to the static contact 4 to being connected to the moving contact 5, the connection relationship of the moving contact 2 is switched from being connected to the static contact 6 to being connected to the moving contact 7, and the connection relationship of the moving contact 3 is switched from being connected to the static contact 8 to being connected to the moving contact 9. Accordingly, Type C-DP is switched to being connected to USB-DP, Type C-DM is switched to being connected to USB-DM, and AU-PhoneSense is switched to being connected to PhoneSense-GND. In this state, the first connector side data terminal 11B is connected to the second connector side data terminal 21B, the first connector side data terminal 11A is connected to the second connector side data terminal 21A, and the headphone detection terminal of the conversion chip 30 is grounded. At this time, the second connector 20 can be connected to the computer, so that data is transmitted between the computer and the mobile phone through the second connector 20 and the first connector 10; at the same time, the headphone detection terminal of the conversion chip 30 no longer obtains the headphone detection signal, and the conversion chip 30 stops the signal conversion action. In this state, when the user pushes the lever again, the connection relationship of the switch 51 can be switched back to Figure 4 The state shown allows the conversion chip 30 to perform signal conversion again.

[0054] Figure 5 FIG. 4 is a circuit structure diagram of a power supply circuit according to an embodiment of the present invention.

[0055] like Figure 5As shown, the power supply circuit 60 includes a first power supply node 61 connected to USB-VBUS-A, a second power supply node 62 connected to C-VBUS-A, and a third power supply node 63 for supplying power to the conversion chip 30. The first power supply node 61 and the second power supply node 62 are respectively connected in parallel to the third power supply node 63 through the MOSFET element Q1 and the MOSFET element Q2, so that USB-VBUS-A and C-VBUS-A are respectively connected in parallel to AU-VBUS through the MOSFET elements, thereby allowing the first connector 10, the second connector 20 to be electrically connected to the conversion chip 30 respectively. Therefore, when the first connector 10 is connected to the mobile phone and the second connector 20 is not connected to the power supply, the voltage at the second power supply node 62 is higher than that at the first power supply node 61, so that the current flows from C-VBUS-A to AU-VBUS. In this state, the conversion chip 30 is powered by the mobile phone through the first connector 10; when the first connector 10 is connected to the mobile phone and the second connector 20 is connected to the power supply, since the power supply voltage is usually higher than the voltage on the mobile phone side, the voltage at the second power supply node 62 is lower than that at the first power supply node 61, so that the current flows from USB-VBUS-A to AU-VBUS. In this state, the conversion chip 30 is powered by the power supply through the second connector 20. At the same time, since the power supply voltage is higher than the voltage on the mobile phone side, the current will also flow from USB-VBUS-A to C-VBUS-A, so that the power supply also powers the mobile phone at the same time, that is, charging the mobile phone.

[0056] In addition, when the second connector 20 is connected to a computer, if the voltage at the computer USB interface is low, the conversion chip 30 is still powered by the mobile phone; if the voltage at the computer USB interface is high, the conversion chip 30 can be powered by the computer.

[0057] In this embodiment, AU-VBUS is connected to the chip power terminal 34 through a chip power supply circuit that cooperates with the AU103 chip. The chip power supply circuit can be designed and manufactured according to chip requirements or in reference to the chip supplier's suggestions. When the conversion chip 30 is replaced with other types of chips in other embodiments, the power supply circuit structure also needs to be changed and adjusted according to actual conditions. Its detailed structure will not be repeated here.

[0058] Example Function and Effect

[0059] According to the headphone charging data cable with a switching function provided in this embodiment, since the switching circuit includes a switching switch, the switching switch can switch the connection state under the user's operation, so that the user can connect the first connector side data terminal with the second connector side data terminal, or connect the first connector side data terminal with the audio source signal input terminal. Therefore, the headphone charging data cable with a switching function in this embodiment can allow the user to manually switch the data connection state of the mobile phone, so that the mobile phone can be connected to the computer while the conversion chip can be used to output a driving signal to the sound unit according to the user's needs. That is to say, the headphone charging data cable with a switching function in this embodiment can realize data transmission or use of the headphones according to the user's choice while realizing charging of the mobile phone.

[0060] The headset charging data cable with switching function in the embodiment also has a sound unit and a microphone, so it can be used directly as a mobile phone headset cable without external headsets or microphones. While being used as a mobile phone headset cable, it can also charge the mobile phone according to the needs of the user, or suspend the function of the mobile phone headset cable to allow data transmission between the mobile phone and the computer. Therefore, the mobile phone connection cable in the embodiment not only has the three functions of charging, headset and data transmission, but the headset and data transmission can also be switched arbitrarily according to the needs of the user.

[0061] In an embodiment, the power supply circuit is in the form of two MOSFET elements, which can control the direction of current flow according to the voltage at different nodes, so that the power supply circuit can automatically power the conversion chip according to the connection status at the first connector or the second connector (corresponding to the voltage), and realize mobile phone charging when the second connector is connected to a power supply or a computer data interface with a higher supply voltage.

[0062] The above embodiments are only used to illustrate different implementation forms of the present invention, and the protection scope of the present invention is not limited to the description scope of the above embodiments.

[0063] For example, in the embodiment, the headphone charging data cable with a switching function is in the form of a sound unit, so it can be used directly as a headphone cable. However, in the present invention, the sound unit and the microphone can also be removed, and the drive signal output terminal can be connected to the headphone interface (for example, a 3.5mm headphone interface), so that the headphone charging data cable with a switching function of the present invention can be connected to other headphones for use. In addition, it is also possible to only remove the sound unit, connect the drive signal output terminal to the headphone interface and install the microphone in the embodiment at the headphone interface, so that the headphone charging data cable with a switching function of the present invention can be connected to a headphone without a microphone function while realizing the microphone pickup function, and voice calls can also be made when using a headphone without a microphone function.

[0064] In the embodiment, the power supply circuit is in the form of two MOSFET elements, so the power supply circuit can automatically power the conversion chip according to the connection status at the first connector or the second connector, but in the present invention, the power supply circuit can also be designed to contain a switching switch, allowing the user to switch the connection relationship of the chip power terminals according to needs, thereby realizing manual switching of chip power supply.

[0065] The conversion chip in the embodiment is an AU103 chip, which can simultaneously convert and transmit the sound source signal and the microphone signal. In the present invention, the conversion chip can also be replaced with other types of chips with conversion functions, which can be a chip with the same function as AU103, or a chip with only the sound source signal conversion function; when a chip with only the sound source signal conversion function is selected, the microphone can be removed accordingly.

[0066] In addition, the first connector in the embodiment is in Type C form, and the second connector is in USB form, but in the present invention, the first connector may also be in other connector forms that can be connected to a mobile phone, and the second connector may also be in other connector forms that can be connected to a power source and a computer, as long as the first connector and the second connector are provided with terminals with the same functions as in the embodiment.

Claims

1. A headphone charging data cable with a switching function, characterized in that: include: A first connector, used to connect to a mobile phone interface of a mobile phone, having a first connector-side data terminal corresponding to a mobile phone-side data terminal in the mobile phone interface; A second connector, used to connect to a power interface of a charging power source when the mobile phone is charging, or to connect to a data interface of a computer when the mobile phone is transmitting data, and having a second connector-side data terminal corresponding to an interface-side data terminal in the data interface; A conversion chip, used for converting the sound source signal of the mobile phone into a driving signal for driving the sound unit, having a sound source signal input terminal and a driving signal output terminal; A switching circuit having a switching switch, The switching switch is respectively connected to the audio source signal input terminal, the first connector side data terminal and the second connector side data terminal, so that the user can switch the connection relationship of the switching switch so that the first connector side data terminal is connected to the second connector side data terminal, or the first connector side data terminal is connected to the audio source signal input terminal. The switch has at least a static contact connected to the first connector side data terminal and a pair of moving contacts matched with the static contact, one of the pair of moving contacts is connected to the audio source signal input terminal, and the other is connected to the second connector side data terminal. The conversion chip also has an earphone detection terminal. The switch also has a static contact connected to the headphone detection terminal and a pair of moving contacts matched with the static contact, one of the pair of moving contacts is connected to the headphone detection terminal, and the other is grounded. The earphone charging data cable also includes a power supply circuit. The first connector also has a first connector-side power terminal that matches the power terminal in the mobile phone interface. The second connector also has a second connector-side power terminal that matches the power terminal in the power interface or the data interface. The conversion chip also has a chip-side power supply terminal for receiving power supply. The power supply circuit has a plurality of power supply nodes respectively connected to the first connector side power supply terminal, the second connector side power supply terminal and the chip side power supply terminal. The power supply nodes are connected in parallel through MOSFET elements, so that when the first connector is connected to the mobile phone interface and the second connector side power supply terminal is not connected, current flows from the first connector side power supply terminal to the chip side power supply terminal, and when the second connector side power supply terminal is connected to the power supply, current flows from the second connector side power supply terminal to the chip side power supply terminal.

2. The headphone charging data cable with switching function according to claim 1, characterized in that: Also includes: At least one sound-generating unit is connected to the driving signal output terminal and is used to receive the driving signal.

3. The headphone charging data cable with switching function according to claim 1, characterized in that: Also includes: microphone, The conversion chip further has a microphone signal receiving terminal, and the microphone is connected to the microphone signal receiving terminal.

4. The headphone charging data cable with switching function according to claim 1, characterized in that: Also includes: The headphone interface is connected to the driving signal output terminal and is used to transmit the driving signal to an external headphone.

5. The headphone charging data cable with switching function according to claim 4, characterized in that: Also includes: A microphone is installed at the headphone jack. The conversion chip further has a microphone signal receiving terminal, and the microphone is connected to the microphone signal receiving terminal.

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