Control methods for converters, interface converters, audio components, and audio devices

Abstract

This application discloses a converter, an interface converter, an audio component, and a control method for an audio device. The converter includes a first interface and a second interface. The first interface includes a power supply pin, and the second interface includes a CC pin group. The converter also includes a resistor element and a switching circuit. A first end of the resistor element is connected to the power supply pin of the first interface. The first interface also includes a signal ground pin. The switching circuit is connected to the signal ground pin of the first interface, the second end of the resistor element, and the CC pin group of the second interface. The switching circuit is configured to turn on or off based on the presence or absence of a signal ground pin on an external interface that mates with the first interface. This converter solves the problem in the prior art of not being able to identify the protocol system of the interface.

Description

Technical Field

[0001] This application relates to the field of interface conversion technology, and in particular to a converter, interface converter, audio component, and control method for an audio device. Background Technology

[0002] Currently, host computers and Type-C audio devices are connected via USB-A to Type-C converters. These converters have a first interface and a second interface. The first interface plugs into the host computer's USB-A female interface, and the second interface plugs into the audio device's Type-C male interface. Host computers are categorized into older and newer models. Older models typically have a USB-A 2.0 female interface with a 500mA output, while newer models generally have a USB-A 3.0 female interface with a 900mA output. Since audio devices cannot recognize the protocol of the host computer's USB-A female interface, and to ensure compatibility with older models and prevent overloading of the host computer's USB-A female interface due to excessive power output from the audio device's amplifier module, the default output power of the audio device's amplifier module is 2.5W. Summary of the Invention

[0003] Embodiments of this application provide a control method for a converter, an interface converter, an audio component, and an audio device to solve the problem of the inability to recognize the protocol system of the interface in the prior art.

[0004] In a first aspect, embodiments of this application provide a converter, the converter including: a first interface and a second interface, the first interface including: a power supply pin, the second interface including: a CC pin group, the converter further including: a resistor element and a switching circuit; a first end of the resistor element is connected to the power supply pin of the first interface, the first interface further including: a signal ground pin; the switching circuit is connected to the signal ground pin of the first interface, the switching circuit is connected to the second end of the resistor element, the switching circuit is connected to the CC pin group of the second interface, and the switching circuit is configured to be turned on or off depending on whether an external interface cooperating with the first interface has a signal ground pin.

[0005] Optionally, the first interface is a USB-A male interface, and the second interface is a Type-C female interface; the external interface that works with the first interface is a USB-A female interface.

[0006] Optionally, the resistive element includes: a first resistor and a second resistor; the CC pin group of the second interface includes: a CC1 pin and a CC2 pin; a first end of the first resistor is connected to the power supply pin of the first interface, and a second end of the first resistor is connected to the switching circuit; a first end of the second resistor is connected to the power supply pin of the first interface, and a second end of the second resistor is connected to the switching circuit.

[0007] Optionally, the switching circuit includes: a first power switch transistor, a third resistor, and a fourth resistor. A first end of the first power switch transistor is connected to a second end of the first resistor. The second end of the first power switch transistor is connected to the CC1 pin of the second interface. A first end of the third resistor is connected to a power supply pin of the first interface. A second end of the third resistor is connected to a control terminal of the first power switch transistor and to a first end of the fourth resistor. The second end of the fourth resistor is connected to a signal ground pin of the first interface.

[0008] Optionally, the switching circuit further includes: a second switching power transistor and a fifth resistor, wherein a first end of the second switching power transistor is connected to a second end of the second resistor, the second end of the second switching power transistor is connected to the CC2 pin of the second interface, a first end of the fifth resistor is connected to a power supply pin of the first interface, and a second end of the fifth resistor is connected to the control terminal of the second switching power transistor and to a first end of the fourth resistor.

[0009] Optionally, the first power switch is a MOSFET, with its first terminal being the drain of the MOSFET, its second terminal being the source of the MOSFET, and its control terminal being the gate of the MOSFET; the second power switch is a MOSFET, with its first terminal being the drain of the MOSFET, its second terminal being the source of the MOSFET, and its control terminal being the gate of the MOSFET.

[0010] Optionally, the converter also includes a metal casing, and the second interface further includes a first power ground pin, the metal casing being connected to the first power ground pin. The first interface also includes a second power ground pin, the metal casing being connected to the second power ground pin. The converter further includes: a first TVS diode, the first end of which is connected to the metal casing, and the second end of which is connected to the source of the first switching power transistor; a second TVS diode, the first end of which is connected to the metal casing, and the second end of which is connected to the source of the second switching power transistor; a third TVS diode, the first end of which is connected to the metal casing, and the second end of which is connected to the second end of the fourth resistor; and a fourth TVS diode, the first end of which is connected to the metal casing, and the second end of which is connected to both the first and second ends of the first and second resistors.

[0011] Secondly, embodiments of this application provide an interface converter, which includes a first interface and a second interface, and further includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first power switch, and a second power switch. A first end of the first resistor is connected to a power supply pin of the first interface; a second end of the first resistor is connected to a first end of the first power switch; a second end of the first power switch is connected to the CC1 pin of the second interface; a first end of the third resistor is connected to a power supply pin of the first interface; a second end of the third resistor is connected to a control terminal of the first power switch and to a first end of the fourth resistor; a second end of the fourth resistor is connected to a signal ground pin of the first interface; a first end of the second resistor is connected to a power supply pin of the first interface; a second end of the second resistor is connected to a first end of the second power switch; a second end of the second power switch is connected to the CC2 pin of the second interface; a first end of the fifth resistor is connected to a power supply pin of the first interface; a second end of the fifth resistor is connected to a control terminal of the second power switch and to a first end of the fourth resistor.

[0012] Optionally, the first interface is a USB-A male interface, and the second interface is a Type-C female interface.

[0013] Thirdly, embodiments of this application provide an audio component, including any of the converters described above, and an audio device; the second interface is a Type-C female interface; the audio device includes a Type-C male interface and a CC chip, the CC pin of the CC chip is grounded through a pull-down resistor; the CC pin of the CC chip is connected to the CC1 pin or CC2 pin of the Type-C male interface through a CC line.

[0014] Fourthly, embodiments of this application provide a control method for an audio device, the audio device comprising: a Type-C male interface, a CC chip, and a power amplifier module, wherein the CC pin of the CC chip is grounded through a pull-down resistor; the CC pin of the CC chip is connected to the CC1 pin or CC2 pin of the Type-C male interface through a CC line; when the audio device is connected to a USB-A female interface through any of the aforementioned converters, the method comprises: acquiring an electrical signal of the CC pin of the CC chip; when the electrical signal of the CC pin of the CC chip is a first electrical signal, controlling the power amplifier module to output a first power; and when the electrical signal of the CC pin of the CC chip is a second electrical signal, controlling the power amplifier module to output a second power, wherein the first power is greater than the second power.

[0015] Optionally, when the switching circuit is turned on, the electrical signal of the CC pin of the CC chip is the first electrical signal; when the switching circuit is turned off, the electrical signal of the CC pin of the CC chip is the second electrical signal.

[0016] In one embodiment of this application, a switching circuit is connected to the signal ground pin of the first interface. The switching circuit is also connected to the CC pin group of the second interface. Whether the external interface that cooperates with the first interface has a grounded signal ground pin will affect the switching state of the switching circuit. The voltage of the CC pin group of the second interface will be affected by the switching state of the switching circuit. Therefore, based on the voltage of the CC pin group of the second interface, it can be determined whether the external interface that cooperates with the first interface has a grounded signal ground pin. The presence of a grounded signal ground pin indicates the protocol system of one interface, while the absence of a grounded signal ground pin indicates the protocol system of another interface.

[0017] If the converter's first interface is a USB-A male connector and the second interface is a Type-C female connector, then the external interface that mates with the first interface is the USB-A female connector. USB 3.0A and USB 3.1A female connectors have a ground signal ground pin, while USB 2.0A female connectors do not. When the USB-A male connector is plugged into a newer host computer's USB 3.0A or USB 3.1A female connector, the signal ground pin of the USB-A male connector is connected to the ground signal ground pin of the USB-A female connector, and the signal ground pin of the USB-A male connector is grounded. When the USB-A male connector is plugged into an older host computer's USB-A female connector... When plugging in a USB-A female interface such as SB2.0A, the signal ground pin of the USB-A male interface is left floating because the USB-A female interface does not have a signal ground pin connected. Therefore, the signal ground pin of the USB-A male interface has two states: grounded and floating. The switching circuit turns the USB-A male interface on or off based on the two states of the signal ground pin. Based on the voltage of the CC pin group of the Type-C female interface, it can determine whether the USB-A female interface has a grounded signal ground pin. If a grounded signal ground pin is present, it is a USB 3.0A, USB 3.1A, or other female interface. If no grounded signal ground pin is present, it is a USB 2.0A, or other female interface. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0021] Figure 1 This is a schematic diagram of the structure of a converter provided in an embodiment of this application; Figure 2 This is a schematic diagram of another converter provided in an embodiment of this application; Figure 3(a) is a schematic diagram of the connection relationship between a converter and an audio device's Type-C public interface and a CC chip provided in an embodiment of this application; Figure 3(b) is a schematic diagram showing the connection relationship between another converter and the audio device's Type-C male interface and CC chip provided in an embodiment of this application; Figure 4 A flowchart illustrating a control method for an audio device provided in an embodiment of this application; Figure 5 A structural block diagram of an audio device provided in an embodiment of this application; The icon numbers in the instruction manual are explained as follows: 10. First interface; 20. Second interface; 30. Resistor; 40. Switching circuit; 50. Type-C male interface; 60. CC chip; 70. Main control module; 80. Power amplifier module. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0024] This application provides a control method for a converter, an interface converter, an audio component, and an audio device, which can effectively identify the protocol system of the interface.

[0025] Figure 1 A converter provided in the embodiments of this application, such as Figure 1 As shown, the converter includes: a first interface 10 and a second interface 20. The first interface 10 includes: a power supply pin. The second interface 20 includes: a CC pin group. The converter also includes: a resistor element 30 and a switching circuit 40. The first end of the aforementioned resistor element 30 is connected to the power supply pin of the aforementioned first interface 10, and the aforementioned first interface 10 further includes: a signal ground pin; The switching circuit 40 is connected to the signal ground pin of the first interface 10, the second end of the resistor element 30, and the CC pin group of the second interface 20. The switching circuit 40 is configured to be turned on or off depending on whether the signal ground pin of the external interface cooperating with the first interface 10 is on.

[0026] Specifically, the first interface is a USB-A male interface, and the second interface is a Type-C female interface; the external interface that mates with the first interface is a USB-A female interface. The switching circuit 40 is configured such that when the USB-A male interface and the USB-A female interface are connected, and the Type-C female interface is connected to a device with a Type-C male interface, if the USB-A female interface has a grounded signal ground pin, it is equivalent to the USB-A male interface having a grounded signal ground pin. The switching circuit 40 is then turned on, and the second end of the resistor element 30 is connected to the CC pin group of the Type-C female interface. If the USB-A female interface does not have a grounded signal ground pin, the USB-A male interface's signal ground pin is left floating, the switching circuit 40 is turned off, and the second end of the resistor element 30 is disconnected from the CC pin group of the Type-C female interface. The conduction or deactivation of the switching circuit 40 will affect the electrical signal of the CC pin group of the Type-C female interface. Based on the electrical signal of the CC pin group of the Type-C female interface, it can be determined whether the USB-A female interface has a signal ground pin, thereby determining the protocol system of the USB-A female interface. For example, USB 3.0A, USB 3.1A and other USB 3.x series have a grounded signal ground pin and belong to one protocol system, while USB 2.0A and others do not have a signal ground pin and belong to another protocol system.

[0027] Specifically, the power supply pin is... Figure 1 as well as Figure 2 The VBUS pin in the signal ground pin is... Figure 1 as well as Figure 2 The Drain pin in the middle.

[0028] Specifically, such as Figure 2 As shown, in the first interface 10 of the converter, the VBUS pin numbered 01 is a power supply pin. There is also a power supply pin in the second interface 20 of the converter. The VBUS pins numbered A4, A9, B4, and B9 are power supply pins. The power supply pins in the first interface 10 of the converter are connected to the power supply pins in the second interface 20 of the converter.

[0029] Specifically, such as Figure 2As shown, the first interface 10 further includes: a D- pin numbered 02, a D+ pin numbered 03, an RX- pin numbered 05, an RX+ pin numbered 06, a TX- pin numbered 08, and a TX+ pin numbered 09. The second interface 20 further includes: D- pins numbered A7 and B7, D+ pins numbered A6 and B6, an RX- pin numbered B10, an RX+ pin numbered B11, a TX- pin numbered A3, and a TX+ pin numbered A2. The pins in the first interface 10 are connected to the corresponding pins in the second interface 20.

[0030] Through the above embodiments, such as Figure 1 As shown, when the converter's first interface 10 is connected to a USB-A female interface and the converter's second interface 20 is connected to a device with a Type-C male interface, taking advantage of the fact that USB 3.0A and USB 3.1A female interfaces have grounded signal ground pins, while USB 2.0A and USB 2.1A female interfaces do not, when the first interface 10 is plugged into a new host computer's USB 3.0A or USB 3.1A female interface, the signal ground pin of the first interface 10 is connected to the grounded signal ground pin of the USB 3.0A or USB 3.1A female interface, and the signal ground pin of the first interface 10 is grounded. At this time, the switching circuit 40 is turned on and connects the second end of the resistor element 30 to the CC pin group of the second interface 20. The first end of component 30 is connected to the power pin of the first interface 10. The voltage value of the power pin of the first interface 10 is raised by the resistor component 30 to increase the voltage value of the CC pin group of the second interface 20, so that the voltage value of the CC pin group of the second interface 20 is the first voltage value. When the first interface 10 is plugged into the USB 2.0A, USB 2.1A or other female interfaces of the old host computer, the signal ground pin of the first interface 10 is left floating, the switch circuit 40 is turned off and the second end of the resistor component 30 is disconnected from the CC pin group of the second interface 20. The voltage value of the CC pin group of the second interface 20 is reduced, so that the voltage value of the CC pin group of the second interface 20 is the second voltage value. The protocol system of the USB-A female interface can be identified by the voltage value of the CC pin group of the second interface 20.

[0031] In this embodiment, the protocol system of the USB-A female interface, such as USB 3.0A female interface, USB 3.1A female interface, USB 2.0A female interface, and USB 2.1A female interface, is used to identify the output current of the USB-A female interface. Older host computers are generally equipped with USB-A 2.0 and USB-A 2.1 female interfaces, which output 500mA current. Newer host computers are generally equipped with USB-A 3.0 and USB-A 3.1 female interfaces, which output 900mA current. Therefore, the protocol system of the USB-A female interface in this case is distinguished by the output current. USB-A 2.0 and USB-A 2.1 female interfaces belong to the same category and output 500mA current, while USB-A 3.0 and USB-A 3.1 female interfaces belong to the same category and output 900mA current.

[0032] In this embodiment, the USB-A female interface that outputs 900mA current has a ground signal pin, while the USB-A female interface that outputs 500mA current does not have a ground signal ground pin. Therefore, this embodiment uses this difference to distinguish the USB-A female interfaces. This embodiment uses USB-A3.0 and USB-A2.0 for description, but in other embodiments it can also be USB-A3.1, USB-A2.1, etc., and the specific model is not limited.

[0033] In an optional embodiment, as shown in Figures 3(a) and 3(b), the device with the Type-C male interface 50 can be an audio device, which includes a CC chip 60, the CC chip 60 including a pull-down resistor Rd and a CC pin, the first end of the pull-down resistor Rd being connected to the CC pin of the CC chip 60, and the second end of the pull-down resistor Rd being grounded, characterized in that the CC pin group of the second interface 20 is used to connect to the CC pin of the CC chip 60.

[0034] Specifically, such as Figure 1As shown in Figures 3(a) and 3(b), when the first interface 10 is plugged into the USB 3.0A, USB 3.1A, or other female interfaces of the new host computer, the signal ground pin of the first interface 10 is connected to the grounded signal ground pin of the USB 3.0A, USB 3.1A, or other female interfaces, and the signal ground pin of the first interface 10 is grounded. At this time, the switching circuit 40 is turned on and the second end of the resistor element 30 is connected to the CC pin group of the second interface 20. Since the first end of the resistor element 30 is connected to the power supply pin of the first interface 10, the CC pin group of the second interface 20 is connected to the CC pin of the CC chip 60, and the first end of the pull-down resistor Rd is connected to the CC pin of the CC chip 60, the pull-down resistor Rd... The second end is grounded, and the resistor element 30 and the pull-down resistor Rd form a voltage divider, so that the voltage of the CC pin of the second interface 20 is the first voltage value, or in other words, the voltage of the CC pin of the CC chip 60 is the first voltage value (greater than 0). When the first interface 10 is plugged into the USB2.0A, USB2.1A and other female interfaces of the old host computer, the signal ground pin of the first interface 10 is left floating, the switch circuit 40 is disconnected and the second end of the resistor element 30 is disconnected from the CC pin group of the second interface 20, the voltage value of the CC pin group of the second interface 20 decreases, so that the voltage of the CC pin group of the second interface 20 is the second voltage value (0), or in other words, the voltage of the CC pin of the CC chip 60 is the second voltage value.

[0035] Specifically, as shown in Figures 3(a) and 3(b), the CC pin of the CC chip 60 is actually the CC1 pin or the CC2 pin of the CC chip 60.

[0036] In this embodiment, as Figure 1 As shown in Figures 3(a) and 3(b), the CC pin of the CC chip 60 of the device is connected to the CC pin group of the second interface 20. The voltage value of the CC pin of the CC chip 60 of the device is consistent with the voltage value of the CC pin of the second interface 20. The device determines the protocol system of the USB-A female interface of the host computer that is plugged into the first interface 10 of the converter through the voltage value of the CC pin of the CC chip 60.

[0037] In one alternative embodiment, such as Figure 2 As shown, the resistor element 30 includes a first resistor R1 and a second resistor R2, and the CC pin group of the second interface 20 includes a CC1 pin and a CC2 pin. The first end of the first resistor R1 is connected to the power supply pin of the first interface 10, and the second end of the first resistor R1 is connected to the switching circuit 40. The first end of the second resistor R2 is connected to the power supply pin of the first interface 10, and the second end of the second resistor R2 is connected to the switching circuit 40.

[0038] Specifically, the CC chip has two pins: a CC1 pin and a CC2 pin. One of the CC1 pin and the CC2 pin in the CC chip is connected to a pull-down resistor. The CC1 pin of the CC chip is connected to the pull-down resistor. The Type-C male interface has two pins: a CC1 pin and a CC2 pin. One of the CC1 pin and the CC2 pin in the Type-C male interface is connected to the CC1 pin of the CC chip.

[0039] Specifically, the CC1 pin of the CC chip is connected to the pull-down resistor, and the CC1 pin of the Type-C male interface is connected to the CC1 pin of the CC chip, as shown in Figure 3(a). The converter's second interface 20 is inserted into the device's Type-C male interface 50 in the correct orientation. At this time, the CC1 pin of the second interface 20 is connected to the CC1 pin of the Type-C male interface 50, and the CC2 pin of the second interface 20 is connected to the CC2 pin of the Type-C male interface 50. Since only the CC1 pin of the Type-C male interface 50 is connected to the CC1 pin of the device's CC chip 60 (i.e., connected to the first end of the pull-down resistor Rd of the CC chip 60), therefore, when the converter's second interface 20 is inserted into the device's Type-C male interface 50 in the correct orientation, the CC1 pin of the converter's second interface 20 is connected to the CC1 pin of the CC chip 60. With pin C1 connected, pin CC2 of the converter's second interface 20 is left floating, as shown in Figure 3(b). The converter's second interface 20 is reverse-inserted with the device's Type-C male interface 50. At this time, pin CC1 of the second interface 20 is connected to pin CC2 of the Type-C male interface 50, and pin CC2 of the second interface 20 is connected to pin CC1 of the Type-C male interface 50. Since only pin CC1 of the Type-C male interface 50 is connected to pin CC1 of the CC chip 60 (i.e., connected to the first end of the pull-down resistor Rd of the device's CC chip 60), when the converter's second interface 20 is reverse-inserted with the device's Type-C male interface 50, pin CC2 of the converter's second interface 20 is connected to pin CC1 of the CC chip 60, and pin CC1 of the converter's second interface 20 is left floating.

[0040] Specifically, such as Figure 2As shown in Figure 3(a), when the second interface 20 of the converter is correctly inserted into the Type-C male interface 50 of the device, the CC1 pin of the second interface 20 is connected to the CC pin of the CC chip 60 of the device, and the CC2 pin of the second interface 20 is left floating. At this time, the voltage value of the CC2 pin is the second voltage value. When the first interface 10 is inserted into the USB 3.0A, USB 3.1A, or other female interfaces of the new host computer, the signal ground pin of the first interface 10 is connected to the ground signal ground pin of the USB 3.0A, USB 3.1A, or other female interfaces, and the signal ground pin of the first interface 10 is grounded. At this time, the switching circuit 40 is turned on and the second end of the first resistor R1 is connected to the CC1 pin of the second interface 20. Since the first end of the first resistor R1 is connected to the power supply pin of the first interface 10, the CC1 pin of the second interface 20 is connected to the power supply pin of the first interface 10. The CC pin of CC chip 60 is connected, the first end of pull-down resistor Rd is connected to the CC pin of CC chip 60, and the second end of pull-down resistor Rd is grounded. The first resistor R1 and the pull-down resistor Rd form a voltage divider, so that the voltage of the CC1 pin of the second interface 20 is the first voltage value, or in other words, the voltage of the CC pin of CC chip 60 is the first voltage value. When the first interface 10 is plugged into the USB2.0A, USB2.1A or other female interfaces of the old host computer, the signal ground pin of the first interface 10 is left floating, the switch circuit 40 is turned off and the second end of the first resistor R1 is disconnected from the CC1 pin of the second interface 20, the voltage of the CC1 pin of the second interface 20 is reduced, so that the voltage of the CC1 pin of the second interface 20 is the second voltage value, or in other words, the voltage of the CC pin of CC chip 60 is the second voltage value.

[0041] Specifically, such as Figure 2As shown in Figure 3(b), when the converter's second interface 20 is reverse-connected to the device's Type-C male interface 50, the CC2 pin of the second interface 20 is connected to the CC pin of the device's CC chip, and the CC1 pin of the second interface 20 is left floating. At this time, the voltage value of the CC1 pin is always the second voltage value. When the first interface 10 is connected to the USB 3.0A, USB 3.1A, or other female interfaces of the new host computer, the signal ground pin of the first interface 10 is connected to the ground signal ground pin of the USB 3.0A, USB 3.1A, or other female interfaces, and the signal ground pin of the first interface 10 is grounded. At this time, the switching circuit 40 is turned on and the second end of the second resistor R2 is connected to the CC2 pin of the second interface 20. Since the first end of the second resistor R2 is connected to the power supply pin of the first interface 10, the CC1 pin of the second interface 20 is left floating. Pin 2 is connected to the CC pin of the CC chip. The first end of the pull-down resistor Rd is connected to the CC pin of the CC chip, and the second end of the pull-down resistor Rd is grounded. The second resistor R2 and the pull-down resistor Rd form a voltage divider, so that the voltage of the CC2 pin of the second interface 20 is the first voltage value, or in other words, the voltage of the CC pin of the CC chip is the first voltage value. When the first interface 10 is plugged into the USB2.0A, USB2.1A or other female interfaces of the old host computer, the signal ground pin of the first interface 10 is left floating, the switch circuit 40 is turned off and the second end of the second resistor R2 is disconnected from the CC1 pin of the second interface 20. The voltage of the CC2 pin of the second interface 20 decreases, so that the voltage of the CC2 pin of the second interface 20 is the second voltage value, or in other words, the voltage of the CC pin of the CC chip is the second voltage value.

[0042] Specifically, such as Figure 2 As shown in Figures 3(a) and 3(b), regardless of whether the second interface 20 of the converter is plugged into the Type-C male interface 50 of the device in the correct orientation or in reverse orientation, the switching circuit 40 connects the second end of the first resistor R1 to the CC1 pin of the second interface 20 and the second end of the second resistor R2 to the CC2 pin of the second interface 20 when the signal ground pin of the first interface 10 is connected to the ground signal ground pin of the female interface such as USB3.0A or USB3.1A. When the signal ground pin of the first interface 10 is floating, the connection between the second end of the first resistor R1 and the CC1 pin of the second interface 20 is disconnected, and the connection between the second end of the second resistor R2 and the CC2 pin of the second interface 20 is disconnected.

[0043] Specifically, such as Figure 2As shown in Figures 3(a) and 3(b), the first resistor R1 has a resistance of 56KΩ and the pull-down resistor Rd has a resistance of 5.1KΩ. The first resistor R1 and the pull-down resistor Rd form a voltage divider with ground, so that the voltage value of the CC1 pin of the second interface 20 is between 0.25V and 0.65V. The second resistor R2 has a resistance of 56KΩ and the pull-down resistor Rd has a resistance of 5.1KΩ. The second resistor R2 and the pull-down resistor Rd form a voltage divider with ground, so that the voltage value of the CC2 pin of the second interface 20 is between 0.25V and 0.65V.

[0044] Specifically, such as Figure 2 As shown, in the second interface 20 of the converter, pin A5 is the CC1 pin, and pin B5 is the CC2 pin.

[0045] In this embodiment, as Figure 2 As shown in Figures 3(a) and 3(b), regardless of whether the second interface 20 of the converter is plugged into the Type-C male interface 50 of the device in the correct orientation or in the reverse orientation, the device can determine the protocol system of the host computer's USB-A female interface that is plugged into the first interface 10 of the converter by the type of voltage value of the CC pin of the CC chip 60. That is, if the voltage value of the CC1 pin of the second interface 20 is the first voltage value, it can be determined that the host computer's USB-A female interface is a USB 3.0A, USB 3.1A, or other female interface. If the voltage value of the CC1 pin of the second interface 20 is the second voltage value, it can be determined that the host computer's USB-A female interface is a USB 2.0A, USB 2.1A, or other female interface.

[0046] In one alternative embodiment, such as Figure 2 As shown, the switching circuit 40 includes: The system comprises a first power switch Q1, a third resistor R3, and a fourth resistor R4. The first end of the first power switch Q1 is connected to the second end of the first resistor R1, and the second end of the first power switch Q1 is connected to the CC1 pin of the second interface 20. The first end of the third resistor R3 is connected to the power supply pin of the first interface 10, the second end of the third resistor R3 is connected to the control terminal of the first power switch Q1, and is also connected to the first end of the fourth resistor R4. The second end of the fourth resistor R4 is connected to the signal ground pin of the first interface 10.

[0047] Specifically, such as Figure 2As shown, when the signal ground pin of the first interface is connected to the ground signal ground pin of the USB3.0A, USB3.1A and other female interfaces, the first power switch Q1 is turned on, connecting the second end of the first resistor R1 to the CC1 pin. When the signal ground pin of the first interface is left floating, the first power switch Q1 is turned off, disconnecting the second end of the first resistor R1 from the CC1 pin.

[0048] Specifically, such as Figure 2 As shown, the first power switch Q1 is a MOS transistor, the first terminal of the first power switch Q1 is the drain of the MOS transistor, the second terminal of the first power switch Q1 is the source of the MOS transistor, and the control terminal of the first power switch Q1 is the gate of the MOS transistor.

[0049] Specifically, such as Figure 2 As shown, the first power switch Q1 is a PMOS transistor, the third resistor has a resistance of 56KΩ, and the fourth resistor has a resistance of 1KΩ. The third and fourth resistors form a voltage divider on the ground, so that the gate voltage of the first power switch Q1 reaches the turn-on voltage.

[0050] In this embodiment, as Figure 2 As shown, when the signal ground pin of the first interface 10 is connected to the ground signal ground pin of the female interface such as USB3.0A and USB3.1A, the power supply pin, the third resistor R3 and the fourth resistor R4 form a voltage divider on the ground, so that the voltage at the control terminal of the first power switch Q1 reaches the turn-on voltage, the first power switch Q1 is turned on, and the second end of the first resistor R1 is connected to the CC1 pin. When the signal ground pin of the first interface 10 is left floating, the first power switch Q1 is turned off, and the connection between the second end of the first resistor R1 and the CC1 pin is disconnected.

[0051] In one alternative embodiment, such as Figure 2 As shown, the switching circuit 40 also includes: The second power switch Q2 and the fifth resistor R5 are connected as follows: the first end of the second power switch Q2 is connected to the second end of the second resistor R2, the second end of the second power switch Q2 is connected to the CC2 pin of the second interface 20, the first end of the fifth resistor R5 is connected to the power supply pin of the first interface 10, the second end of the fifth resistor R5 is connected to the control terminal of the second power switch Q2, and is also connected to the first end of the fourth resistor R4.

[0052] Specifically, such as Figure 2As shown, when the signal ground pin of the first interface is connected to the ground signal ground pin of the female interface such as USB3.0A or USB3.1A, the second power switch Q2 is turned on, connecting the second end of the second resistor R2 to the CC2 pin. When the signal ground pin of the first interface is left floating, the second power switch Q2 is turned off, disconnecting the second end of the second resistor R2 from the CC2 pin.

[0053] Specifically, such as Figure 2 As shown, the second power switch Q2 is a MOSFET, the first terminal of the second power switch Q2 is the drain of the MOSFET, the second terminal of the second power switch Q2 is the source of the MOSFET, and the control terminal of the second power switch Q2 is the gate of the MOSFET.

[0054] Specifically, the second power switch Q2 is a PMOS transistor. The turn-on voltage of the second power switch Q2 only requires a very small positive voltage. The fifth resistor R5 has a resistance of 56KΩ, and the fourth resistor R4 has a resistance of 1KΩ. The fifth resistor R5 and the fourth resistor R4 form a voltage divider on the ground, so that the gate voltage of the second power switch Q2 reaches the turn-on voltage.

[0055] In this embodiment, as Figure 2 As shown, when the signal ground pin of the first interface 10 is connected to the ground signal ground pin of the female interface such as USB3.0A and USB3.1A, the power supply pin, the fifth resistor R5 and the fourth resistor R4 form a voltage divider on the ground, so that the voltage at the control terminal of the second power switch Q2 reaches the turn-on voltage, the second power switch Q2 is turned on, and the second end of the second resistor R2 is connected to the CC2 pin. When the signal ground pin of the first interface 10 is left floating, the second power switch Q2 is turned off, and the connection between the second end of the second resistor R2 and the CC2 pin is disconnected.

[0056] In one alternative embodiment, such as Figure 2 As shown, the converter also includes a metal housing, the second interface 20 further includes a first power ground pin, the metal housing is connected to the first power ground pin, the first interface 10 further includes a second power ground pin, the metal housing is connected to the second power ground pin, and the converter also includes: The first TVS diode E1 has its first end connected to the metal casing and its second end connected to the source of the first MOSFET Q1. The second TVS diode E2 has its first end connected to the metal casing and its second end connected to the source of the second MOSFET Q2. The third TVS diode E3, the first end of the third TVS diode E3 is connected to the metal casing, and the second end of the third TVS diode E3 is connected to the second end of the fourth resistor R4. The fourth TVS diode E4 has its first end connected to the metal casing, its second end connected to the first end of the first resistor R1, and its first end connected to the second resistor R2.

[0057] Specifically, such as Figure 2 As shown, the converter also includes a metal housing, and the second interface 20 also includes a first power ground pin. The metal housing is connected to the first power ground pin. The first interface 10 also includes a second power ground pin. The metal housing is connected to the second power ground pin. The metal housing is represented by Shell. In the second interface 20, pins numbered A1, A12, B1, and B12 are all first power ground pins. In the first interface 10, pin numbered O4 is a second power ground pin. The first power ground pin and the second power ground pin are connected. Both the first power ground pin and the second power ground pin are represented by GND.

[0058] In this embodiment, as Figure 2 As shown, a first TVS diode E1, a second TVS diode E2, a third TVS diode E3, and a fourth TVS diode E4 are configured. When an electrostatic current occurs, the first TVS diode E1, the second TVS diode E2, the third TVS diode E3, and the fourth TVS diode E4 quickly conduct, discharging the electrostatic current to the first power ground pin and the second power ground pin, preventing the electrostatic current from damaging the first MOSFET Q1 and the second MOSFET Q2.

[0059] An audio component provided in this application includes any of the above-described converters and an audio device; As shown in Figures 3(a) and 3(b), the audio device includes a Type-C male interface 50 and a CC chip 60. The CC pin of the CC chip 60 is grounded through a pull-down resistor Rd. The CC pin of the CC chip 60 is connected to the CC1 pin or CC2 pin of the Type-C male interface 50 through a CC line.

[0060] Specifically, as shown in Figures 3(a) and 3(b), the CC pin of the CC chip 60 includes a CC1 pin and a CC2 pin. One of the CC1 pin and the CC2 pin of the CC chip 60 is connected to the pull-down resistor Rd. The CC1 pin of the CC chip 60 is set to be connected to the pull-down resistor Rd. The Type-C male interface 50 includes a CC1 pin and a CC2 pin. One of the CC1 pin and the CC2 pin of the Type-C male interface 50 is connected to the CC1 pin of the CC chip 60.

[0061] Figure 4 The control method of the audio device provided in the embodiments of this application is shown in Figures 3(a) and 3(b). The audio device includes: a Type-C male interface 50, a CC chip 60 and a power amplifier module. The CC pin of the CC chip 60 is grounded through a pull-down resistor Rd. The CC pin of the CC chip 60 is connected to the CC1 pin or CC2 pin of the Type-C male interface 50 through a CC line. When the aforementioned audio device is connected to a USB-A female interface via any of the aforementioned converters: For example... Figure 4 As shown, the above method includes: Step S101: Obtain the electrical signal of the CC pin of the CC chip mentioned above; Step S102: When the electrical signal of the CC pin of the CC chip is the first electrical signal, control the power amplifier module to output the first power; when the electrical signal of the CC pin of the CC chip is the second electrical signal, control the power amplifier module to output the second power, wherein the first power is greater than the second power.

[0062] Specifically, such as Figure 5 As shown, the audio device includes a CC chip 60, a main control module 70, and a power amplifier module 80. The CC chip 60 transmits the electrical signal of the CC pin of the CC chip to the main control module 70 through the I2C pin. The main control module 70 controls the output power of the power amplifier module 80 according to the electrical signal of the CC pin of the CC chip.

[0063] Specifically, the first power is 4.5W, and the second power is 2.5W. The aforementioned power amplifier module can specifically be an audio power amplifier.

[0064] Specifically, such as Figure 1 As shown in Figures 3(a) and 3(b), when the switch circuit 40 is turned on, the electrical signal of the CC pin of the CC chip 60 is a first electrical signal; when the switch circuit 40 is turned off, the electrical signal of the CC pin of the CC chip 60 is a second electrical signal. That is, the first electrical signal is the first voltage value, and the second electrical signal is the second voltage value.

[0065] like Figure 5 As shown, existing audio devices are designed to be compatible with older host computer USB-A female interfaces to prevent excessive output power from the audio device's amplifier module 80 from overloading the host computer's USB-A female interface. Therefore, regardless of whether the host computer's USB-A female interface is USB-A 2.0 or USB-A 3.0, the output power of the audio device's amplifier module 80 is 2.5W. The newer host computer's USB-A female interface can output 900mA of current, but due to compatibility with the older host computer's USB-A female interface which outputs only 500mA of current, the performance of the audio device's amplifier module 80 is limited. In some embodiments of this application, the protocol architecture of the host computer's USB-A interface is identified through the circuit structure. When the electrical signal of the CC pin of the CC chip 60 is the first electrical signal, it is determined that the USB-A female interface that is plugged into the first interface of the converter is the USB 3.0A, USB 3.1A, or other female interface of the new host computer. At this time, the power amplifier module 80 of the audio device can be controlled to output the first power. When the electrical signal of the CC pin of the CC chip 60 is the second electrical signal, it is determined that the USB-A female interface that is plugged into the first interface of the converter is the USB 2.0A, USB 2.1A, or other female interface of the old host computer. At this time, the power amplifier module 80 of the audio device can be controlled to output the second power, thereby making full use of the current provided by the USB-A female interface of the new host computer and increasing the power of the power amplifier module 80 in the audio device.

[0066] This application also provides an interface converter, such as... Figure 2As shown, the interface converter includes a first interface 10 and a second interface 20. The first interface 10 is a USB-A male interface, and the second interface 20 is a Type-C female interface. The interface converter also includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first power switch Q1, and a second power switch Q2. The first end of the first resistor R1 is connected to the power supply pin of the first interface 10, the second end of the first resistor R1 is connected to the first end of the first power switch Q1, the second end of the first power switch Q1 is connected to the CC1 pin of the second interface 20, and the first end of the third resistor R3 is connected to the power supply pin of the first interface 10. The second end of the third resistor R3 is connected to the control terminal of the first power switch Q1 and to the first end of the fourth resistor R4. The second end of the fourth resistor R4 is connected to the signal ground pin of the first interface 10. The first end of the second resistor R2 is connected to the power supply pin of the first interface 10. The second end of the second resistor R2 is connected to the first end of the second power switch Q2. The second end of the second power switch Q2 is connected to the CC2 pin of the second interface 20. The first end of the fifth resistor R5 is connected to the power supply pin of the first interface 10. The second end of the fifth resistor R5 is connected to the control terminal of the second power switch Q2 and to the first end of the fourth resistor R4.

[0067] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0068] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A converter, the converter comprising: A first interface and a second interface, wherein the first interface includes a power supply pin and the second interface includes a CC pin group, wherein the converter further includes a resistive element and a switching circuit; The first end of the resistor element is connected to the power supply pin of the first interface, and the first interface further includes a signal ground pin; A switching circuit is provided, which is connected to the signal ground pin of the first interface, the second end of the resistor element, and the CC pin group of the second interface. The switching circuit is configured to be turned on or off depending on whether an external interface cooperating with the first interface has a signal ground pin.

2. The converter according to claim 1, characterized in that, The first interface is a USB-A male interface, and the second interface is a Type-C female interface; the external interface that works with the first interface is a USB-A female interface.

3. The converter according to claim 1, characterized in that, The resistive element includes: a first resistor and a second resistor, and the CC pin group of the second interface includes: CC1 pin and CC2 pin; The first end of the first resistor is connected to the power supply pin of the first interface, and the second end of the first resistor is connected to the switching circuit. The first end of the second resistor is connected to the power pin of the first interface, and the second end of the second resistor is connected to the switching circuit.

4. The converter according to claim 3, characterized in that, The switching circuit includes: The system comprises a first power switch, a third resistor, and a fourth resistor. The first end of the first power switch is connected to the second end of the first resistor. The second end of the first power switch is connected to the CC1 pin of the second interface. The first end of the third resistor is connected to the power supply pin of the first interface. The second end of the third resistor is connected to the control terminal of the first power switch and to the first end of the fourth resistor. The second end of the fourth resistor is connected to the signal ground pin of the first interface.

5. The converter according to claim 4, characterized in that, The switching circuit also includes: The second power switch and the fifth resistor are connected as follows: the first end of the second power switch is connected to the second end of the second resistor, the second end of the second power switch is connected to the CC2 pin of the second interface, the first end of the fifth resistor is connected to the power supply pin of the first interface, the second end of the fifth resistor is connected to the control terminal of the second power switch and is also connected to the first end of the fourth resistor.

6. The converter according to claim 5, characterized in that, The first power switch is a MOSFET, the first terminal of the first power switch is the drain of the MOSFET, the second terminal of the first power switch is the source of the MOSFET, and the control terminal of the first power switch is the gate of the MOSFET. The second power switch is a MOSFET, the first terminal of the second power switch is the drain of the MOSFET, the second terminal of the second power switch is the source of the MOSFET, and the control terminal of the second power switch is the gate of the MOSFET.

7. The converter according to claim 5, characterized in that, It also includes a metal housing, and the second interface further includes a first power ground pin, the metal housing being connected to the first power ground pin, and the first interface further includes a second power ground pin, the metal housing being connected to the second power ground pin; The converter also includes: A first TVS diode, wherein a first terminal of the first TVS diode is connected to the metal casing, and a second terminal of the first TVS diode is connected to the source of the first switching power transistor; The second TVS diode has its first end connected to the metal casing and its second end connected to the source of the second switching power transistor. The third TVS diode, the first end of which is connected to the metal casing, and the second end of which is connected to the second end of the fourth resistor; The fourth TVS diode has its first end connected to the metal casing, and its second end connected to the first end of the first resistor and the first end of the second resistor.

8. An interface converter, the interface converter comprising a first interface and a second interface, characterized in that, Also includes: First resistor, second resistor, third resistor, fourth resistor, fifth resistor, first power switch and second power switch; The first end of the first resistor is connected to the power supply pin of the first interface, the second end of the first resistor is connected to the first end of the first power switch, the second end of the first power switch is connected to the CC1 pin of the second interface, the first end of the third resistor is connected to the power supply pin of the first interface, the second end of the third resistor is connected to the control terminal of the first power switch and is also connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the signal ground pin of the first interface, and the first end of the second resistor is connected to the power supply pin of the first interface. The second end of the second resistor is connected to the first end of the second power switch, the second end of the second power switch is connected to the CC2 pin of the second interface, the first end of the fifth resistor is connected to the power supply pin of the first interface, the second end of the fifth resistor is connected to the control terminal of the second power switch, and is also connected to the first end of the fourth resistor.

9. An interface converter according to claim 8, characterized in that, The first interface is a USB-A male interface, and the second interface is a Type-C female interface.

10. An audio component, characterized in that, Includes the converter as described in any one of claims 1-7, and an audio device; the second interface is a Type-C female interface; The audio device includes a Type-C male interface and a CC chip. The CC pin of the CC chip is grounded through a pull-down resistor. The CC pin of the CC chip is connected to the CC1 pin or CC2 pin of the Type-C male interface through a CC line.

11. A method for controlling an audio device, characterized in that, The audio device includes: a Type-C male interface, a CC chip, and a power amplifier module. The CC pin of the CC chip is grounded through a pull-down resistor. The CC pin of the CC chip is connected to the CC1 pin or CC2 pin of the Type-C male interface through a CC line. When the audio device is connected to a USB-A female interface via the converter as described in claim 2 The method includes: Obtain the electrical signal of the CC pin of the CC chip; When the electrical signal at the CC pin of the CC chip is a first electrical signal, the power amplifier module is controlled to output a first power; when the electrical signal at the CC pin of the CC chip is a second electrical signal, the power amplifier module is controlled to output a second power, wherein the first power is greater than the second power.

12. The control method for the audio device according to claim 11, characterized in that, When the switching circuit is turned on, the electrical signal of the CC pin of the CC chip is the first electrical signal; When the switching circuit is turned off, the electrical signal of the CC pin of the CC chip is the second electrical signal.

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