CN210721446U

CN210721446U - Interface detection control device and interface converter

Info

Publication number: CN210721446U
Application number: CN201922012651.3U
Authority: CN
Inventors: 刘裕; 杨国利; 李潮鑫
Original assignee: Shenzhen Tengteng Hi Tech Electronic Technology Co ltd
Current assignee: Shenzhen Tengteng Hi Tech Electronic Technology Co ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-06-09
Anticipated expiration: 2029-11-20

Abstract

The utility model provides an interface detects controlling means and interface converter, include: the USB Type-C public connector, the USB Type-C female socket, the audio decoding chip, the signal switching chip and the first interface detection circuit are arranged on the USB Type-C public connector; the signal switching chip is respectively connected with the USB Type-C male connector, the USB Type-C female socket and the audio decoding chip and is used for switching between analog signals and digital signals; first interface detection circuitry is connected with USB Type-C female seat, audio frequency decoding chip, signal switching chip respectively for detect USB Type-C female seat and to signal switching chip and audio frequency decoding chip output control signal. The device provided by the utility model only uses a signal switching chip just to realize the compatibility to analog earphone and digital earphone, has simplified circuit structure, has reduced the volume of product, has reduced the cost of product.

Description

Interface detection control device and interface converter

Technical Field

The embodiment of the utility model provides a relate to adapter technical field, concretely relates to interface detection control device and interface converter.

Background

With the rapid development and popularization of intelligent terminals, various interface standards for the intelligent terminals appear. Because various interface standards cannot be compatible, not only is the waste of resources caused, but also inconvenience and trouble are brought to the user of the intelligent terminal. In order to solve the problem that the physical interface specification is not uniform for a long time, the USB Type-C interface is opened along with the latest Universal Serial Bus (USB) 3.1 standard, functions of charging, displaying, data transmission and the like are integrated, the USB Type-C interface also supports positive and negative symmetric plugging, and the problem of inaccurate plugging in practical application is effectively solved.

Because many advantages that USB Type-C interface has received the favor of intelligent terminal manufacturer, more and more intelligent terminal has adopted USB Type-C interface. Meanwhile, the USB Type-C interface is integrated with an audio signal transmission function, so that the 3.5mm audio interface is gradually cancelled by terminal equipment such as a smart phone and a tablet personal computer, and the USB Type-C interface is used as the only physical interface for connecting the equipment with the outside. When a user uses a terminal device with only one USB Type-C interface, such a problem occurs: when the USB Type-C interface is used for charging the equipment, the peripheral equipment cannot be connected, such as connecting an earphone to listen to music, talk or watch videos; when USB Type-C interface is used to connect the peripheral device, it will not be possible to charge the device. Namely, the above functions cannot be realized simultaneously due to only one USB Type-C interface.

In order to meet the use requirements of users, products which convert one USB Type-C interface into one charging interface and at least one USB Type-C audio interface are gradually appeared. However, the earphones with the USB Type-C interface include an analog Type earphone and a digital Type earphone, and in order to be compatible with the two types of earphones, the existing product uses two signal switching chips to realize signal switching, which results in a large product size and high cost.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an interface detects controlling means and interface converter for solve current product bulky, problem with high costs.

In a first aspect, an embodiment of the present invention provides an interface detection control device, including: the USB Type-C male connector is used for connecting terminal equipment, the USB Type-C female seat is used for connecting peripheral equipment, the audio decoding chip is used for converting digital audio signals into analog audio signals, the signal switching chip is used for switching between the analog signals and the digital signals, and the first interface detection circuit is used for detecting the USB Type-C female seat;

the audio decoding chip is connected with the USB Type-C male connector, and the signal switching chip is respectively connected with the USB Type-C male connector, the USBType-C female socket and the audio decoding chip;

the first interface detection circuit comprises a first resistor, a second resistor, a third resistor, a first NMOS (N-channel metal oxide semiconductor) tube, a second NMOS tube and a first diode; one end of each of the first resistor, the second resistor and the third resistor is connected with a VCC power supply end respectively, the grid electrode of the first NMOS tube is connected with the CC1 pin of the USB Type-C female seat and the other end of the first resistor respectively, the grid electrode of the second NMOS tube is connected with the CC2 pin of the USB Type-C female seat and the other end of the third resistor respectively, the source electrodes of the first NMOS tube and the second NMOS tube are grounded, and the drain electrodes of the first NMOS tube and the second NMOS tube, the anode of the first diode and the other end of the second resistor are connected;

the cathode of the first diode is connected with the control end of the signal switching chip and used for outputting a control signal to the signal switching chip;

and the cathode of the first diode is connected with the audio decoding chip and used for outputting a control signal to the audio decoding chip.

In one embodiment, the cathode of the first diode is connected to the audio decoding chip, and the method includes:

the cathode of the first diode is connected with the audio decoding chip through a first audio decoding chip control circuit, and the first audio decoding chip control circuit is used for controlling power supply of the audio decoding chip and comprises a fourth resistor, a fifth resistor, a sixth resistor, a third NMOS tube and a PMOS tube;

the drain electrode of the PMOS tube is connected with the audio decoding chip, the source electrode of the PMOS tube is connected with a VCC power supply end, one end of the fourth resistor is connected with the VCC power supply end, the other end of the fourth resistor is connected with the grid electrode of the PMOS tube and the drain electrode of the third NMOS tube, one end of the fifth resistor is connected with the cathode of the first diode, the other end of the fifth resistor is connected with the grid electrode of the third NMOS tube and one end of the sixth resistor, and the source electrode of the third NMOS tube and the other end of the sixth resistor are grounded.

the cathode of the first diode is connected with the audio decoding chip through a second audio decoding chip control circuit, and the second audio decoding chip control circuit is used for controlling the power supply of the audio decoding chip to comprise a seventh resistor and a fifth NMOS tube;

the drain electrode of the fifth NMOS tube is connected with the audio decoding chip, the source electrode of the fifth NMOS tube is grounded, the grid electrode of the fifth NMOS tube and one end of the seventh resistor are connected with the cathode of the first diode, and the other end of the seventh resistor is grounded.

the cathode of the first diode is connected with an enabling pin of the audio decoding chip.

the cathode of the first diode is connected with a reset pin of the audio decoding chip.

the negative electrode of the first diode is connected with the insertion detection pin of the analog earphone of the audio decoding chip.

In one embodiment, the method further comprises: the audio interface detection circuit comprises a 3.5mm audio interface and a second interface detection circuit, wherein the second interface detection circuit is used for detecting the 3.5mm audio interface and comprises an eighth resistor, a ninth resistor and a second diode;

one end of the ninth resistor is connected with a VCC power supply end, and the other end of the ninth resistor is connected with a 3.5mm audio interface;

one end of the eighth resistor is grounded, and the other end of the eighth resistor is connected with the anode of the second diode and the 3.5mm audio interface;

the cathode of the second diode is connected with the control end of the signal switching chip and used for outputting a control signal to the signal switching chip;

and the cathode of the second diode is connected with the audio decoding chip and is used for outputting a control signal to the audio decoding chip.

In one embodiment, the method further comprises: and the auxiliary power supply module is used for supplying power to the audio decoding chip and the signal switching chip.

In one embodiment, the method further comprises: the charging interface is connected with the USB Type-C male connector through the charging control module.

In a second aspect, an embodiment of the present invention provides an interface converter, including: a housing and an interface detection control apparatus according to any one of the first aspect; the interface detection control device is arranged inside the shell.

The embodiment of the utility model provides an interface detection control device and interface converter, including USB Type-C public head, USB Type-C female seat, audio frequency decoding chip, signal switching chip and first interface detection circuit; the signal switching chip is respectively connected with the USB Type-C male connector, the USB Type-C female socket and the audio decoding chip and is used for switching between analog signals and digital signals; the first interface detection circuit is respectively connected with the USB Type-C female socket, the audio decoding chip and the signal switching chip. Peripheral equipment connected with the USB Type-C female seat is detected through the first interface detection circuit, and the audio decoding chip and the signal switching chip are controlled to work according to the Type of the connected peripheral equipment. When the analog earphone is connected, the Audio decoding chip is controlled to convert the digital Audio signal into an analog Audio signal, and the signal switching chip is controlled to switch to an Audio mode to transmit the analog signal; when the digital earphone is connected, the audio decoding chip is controlled to stop working, and the signal switching chip is controlled to be switched to a USB mode to transmit digital signals. The earphone not only realizes the compatibility of the analog earphone and the digital earphone, but also adopts only one signal switching chip, simplifies the circuit structure, reduces the volume of the product and reduces the cost of the product.

Drawings

FIG. 1 is a schematic structural diagram of an interface detection control apparatus according to an embodiment;

FIG. 2 is a schematic structural diagram of an interface detection control apparatus according to yet another embodiment;

FIG. 3 is a schematic structural diagram of an interface detection control apparatus according to another embodiment;

FIG. 4 is a schematic structural diagram of an interface detection control apparatus according to yet another embodiment;

FIG. 5 is a schematic structural diagram of an interface detection control apparatus according to another embodiment;

FIG. 6 is a schematic structural diagram of an interface converter according to an embodiment;

fig. 7 is a schematic structural diagram of an interface converter according to yet another embodiment.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

Fig. 1 is a schematic structural diagram of an interface detection control apparatus according to an embodiment. As shown in fig. 1, the apparatus may include: public head 10 of USB Type-C, female seat 20 of USB Type-C, audio decoding chip 30, signal switching chip 40 and first interface detection circuit 50. The USB Type-C male connector 10 is used for connecting terminal equipment, the terminal equipment adopts a USB Type-C interface, and the terminal equipment can be a smart phone, a tablet personal computer, intelligent wearable equipment and the like; the USB Type-C female socket 20 is used for connecting a peripheral device, and the peripheral device adopts a USB Type-C interface, and may include an earphone, a USB disk, a mouse, a keyboard, and the like; the audio decoding chip 30 is used to convert a digital audio signal into an analog audio signal, and for example, a USB digital audio decoding chip may be used; the signal switching chip 40 is used for switching between analog signals and digital signals; the first interface detection circuit 50 is configured to detect the USB Type-C female socket 20, and send a control signal to the audio decoding chip 30 and the signal switching chip 40 according to the Type of the peripheral device connected to the USB Type-C female socket 20, so that the signal switching chip 40 determines whether to transmit a digital signal or an analog signal according to the control signal, and the audio decoding chip 30 determines whether signal conversion is required according to the control signal.

As shown in FIG. 1, the audio decoding chip 30 is connected to the USB Type-C male connector 10, and the signal switching chip 40 is connected to the USB Type-C male connector 10, the USB Type-C female connector 20 and the audio decoding chip 30 respectively. Specifically, the signal input part of the audio decoding chip 30 is connected with the USB Type-C male plug 10, and when the USB Type-C female socket 20 is connected with an analog earphone, the signal input part is used for receiving a digital signal output by a terminal device, converting the digital signal into an analog signal, and then outputting the analog signal to the earphone connected with the USB Type-C female socket 20 through the signal switching chip 40.

The first interface detection circuit 50 includes a first resistor R1, a second resistor R2, a third resistor R3, a first NMOS transistor Q1, a second NMOS transistor Q2, and a first diode D1. One end of each of the first resistor R1, the second resistor R2 and the third resistor R3 is connected with a VCC power supply end respectively, the grid of the first NMOS transistor Q1 is connected with the CC1 pin of the USB Type-C female seat 20 and the other end of the first resistor R1 respectively, the grid of the second NMOS transistor Q2 is connected with the CC2 pin of the USB Type-C female seat 20 and the other end of the third resistor R3 respectively, the sources of the first NMOS transistor Q1 and the second NMOS transistor Q2 are grounded, the drains of the first NMOS transistor Q1 and the second NMOS transistor Q2, the positive electrode of the first diode D1 and the other end of the second resistor R2 are connected; the cathode of the first diode D1 is connected to the control terminal of the signal switching chip 40, and is configured to output a control signal to the signal switching chip 40; the cathode of the first diode D1 is connected to the audio decoding chip 30 for outputting a control signal to the audio decoding chip 30.

Optionally, the first diode D1 may be a schottky diode, and the fast response of the earphone during plugging and unplugging may be achieved by using the fast switching speed of the schottky diode.

In this embodiment, the signal switching chip 40 may include, for example, a USB mode and an Audio mode. In the USB mode, the signal switching chip 40 switches to the digital signal operating mode; in the Audio mode, the signal switching chip 40 switches to the analog signal operating mode.

The earphones with the USB Type-C interface comprise a digital Type earphone and an analog Type earphone, and if the interface converter cannot be compatible with the two types of earphones at the same time, the user experience is affected. Since the two types of headphones are often indistinguishable in appearance, a user may not know whether the headphones in their hand are digital or analog. When the connection converter can not be used, a user can misunderstand that the product quality problem is caused, the user experience is seriously reduced, and even the goods return phenomenon is caused. The device provided by the embodiment can be compatible with two types of earphones at the same time, specifically:

when the USB Type-C female receptacle 20 is connected to a digital headset, the pin CC1 or the pin CC2 is low, i.e. only one of the two pins is low. Taking CC1 as a low level, Q1 is turned off, Q2 is turned on, the positive electrode of D1 is at a low level, D1 is turned off, and a low level control signal is output to the audio decoding chip 30 and the signal switching chip 40. The case of CC2 being low is similar and will not be described here. The signal switching chip 40 switches to the USB mode after receiving the control signal of the low level, and transmits the digital signal between the USB Type-C male connector 10 and the USB Type-C female connector 20. The audio decoding chip 30 stops its operation after receiving the low level control signal. When the USB Type-C female socket 20 is connected to an analog earphone, the pin CC1 and the pin CC2 are both at a low level, at this time, Q1 and Q2 are both turned off, the positive electrode of D1 is at a high level, D1 is turned on, and a high-level control signal is output to the audio decoding chip 30 and the signal switching chip 40. The signal switching chip 40 switches to the Audio mode after receiving the high-level control signal, and transmits the analog signal between the Audio decoding chip 30 and the USB Type-C female socket 20. The audio decoding chip 30 converts the digital audio signal output by the USB Type-C male 10 into an analog audio signal after receiving the high-level control signal.

Optionally, the method may further include: and an auxiliary power module (not shown) for supplying power to the audio decoding chip 30 and the signal switching chip 40.

The interface detection control device provided by this embodiment detects the peripheral device connected to the USB Type-C female socket through the first interface detection circuit, and controls the audio decoding chip and the signal switching chip to operate according to the Type of the connected peripheral device. When the analog earphone is connected, the Audio decoding chip is controlled to convert the digital Audio signal into an analog Audio signal, and the signal switching chip is controlled to switch to an Audio mode to transmit the analog signal; when the digital earphone is connected, the audio decoding chip is controlled to stop working, and the signal switching chip is controlled to be switched to a USB mode to transmit digital signals. The earphone not only realizes the compatibility of the analog earphone and the digital earphone, but also adopts only one signal switching chip, simplifies the circuit structure, reduces the volume of the product and reduces the cost of the product.

On the basis of the above embodiments, the connection relationship between the first interface detection circuit and the audio decoding chip and the control of the audio decoding chip by the control signal output by the first interface detection circuit will be described in detail below by several specific embodiments. In the following embodiments, the pins 0 to 9 of the audio decoding chip 30 are respectively: VSS, VCMO1, VCMO0, MIC0, MIC1, VCOM, AVSS, DACL, DACR, VDDIO, LDOIN, pins 15 and 16 are USBDM and USBDP, respectively; the signal switching chip 40 may include, for example, pins 1 to 10, which are in turn: d-, R, L, GND, VCC, D-/L, D +/R, ALP Sel, USB Sel, and D +. In the following embodiments, some pins are not shown in the drawings, and the specific connection relationship may refer to an industry specification, which is not described herein again.

Fig. 2 is a schematic structural diagram of an interface detection control apparatus according to yet another embodiment. As shown in fig. 2, the interface detection control apparatus provided in this embodiment further includes, on the basis of the embodiment shown in fig. 1: the first audio decoding chip control circuit 60 is used for controlling the power supply of the audio decoding chip 30. The negative CTR control terminal of the first diode D1 in the first interface detection circuit 50 is connected to the audio decoding chip 30 through the first audio decoding chip control circuit 60. The first audio decoding chip control circuit 60 may include: a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a third NMOS transistor Q3 and a PMOS transistor Q4.

Specifically, the drain of the PMOS transistor Q4 is connected to a pin VDDIO 9 of the audio decoding chip 30, the source of the PMOS transistor Q4 is connected to a VCC power supply terminal, one end of the fourth resistor R4 is connected to the VCC power supply terminal, the other end of the fourth resistor R4 is connected to the gate of the PMOS transistor Q4 and the drain of the third NMOS transistor Q3, one end of the fifth resistor R5 is connected to the negative CTR control terminal of the first diode D1, the other end of the fifth resistor R5 is connected to the gate of the third NMOS transistor Q3 and one end of the sixth resistor R6, and the source of the third NMOS transistor Q3 and the other end of the sixth resistor R6 are grounded.

As shown in fig. 2, the USBDP pin and the USBDM pin of the audio decoding chip 30 are respectively connected to the D + pin and the D-pin of the USB Type-C male 10, and the DACR pin and the DACL pin of the audio decoding chip 30 are respectively connected to the R pin and the L pin of the signal switching chip 40; the D + pin and the D-pin of the signal switching chip 40 are respectively connected with the D + pin and the D-pin of the USB Type-C male head 10, the D +/R pin and the D-/L pin of the signal switching chip 40 are respectively connected with the D +/R pin and the D-/L pin of the USB Type-C female seat 20, and the ALP Sel pin of the signal switching chip 40 is connected with the negative pole CTR control end of the first diode D1 in the first interface detection circuit 50.

When the USB Type-C female seat 20 is connected with an analog earphone, and the CTR control end outputs a high level, Q3 is conducted, Q4 is conducted, the VCC power end supplies power to the audio decoding chip 30, the audio decoding chip 30 completes the conversion from a digital audio signal to an analog audio signal, and the signal switching chip 40 acquires the analog audio signal from the audio decoding chip 30 through an R pin and an L pin and outputs the analog audio signal to the analog earphone connected with the USB Type-C female seat 20; when female seat 20 of USB Type-C connects the digital earphone, when the CTR control end output low level, Q3 shuts off, Q4 shuts off, and the VCC power end is disconnected to the power supply route of audio decoding chip 30, and audio decoding chip 30 does not have the power supply and does not work, and signal switching chip 40 obtains digital audio signal from public head 10 of USB Type-C through D + pin and D-pin to the digital earphone that female seat 20 of USB Type-C is connected is directly exported.

The interface detection control device provided by the embodiment receives the control signal output by the first interface detection circuit through the first audio decoding chip control circuit, controls the power supply of the audio decoding chip according to the control signal, is compatible with an analog earphone and a digital earphone, has high compatibility, can improve the user experience, and only adopts one signal switching chip, thereby simplifying the circuit structure, reducing the volume of the product and reducing the cost of the product.

Fig. 3 is a schematic structural diagram of an interface detection control apparatus according to another embodiment. As shown in fig. 3, the interface detection control apparatus provided in this embodiment further includes, based on the embodiment shown in fig. 1: and a second audio decoding chip control circuit 70 for controlling power supply of the audio decoding chip 30. The negative CTR control terminal of the first diode D1 in the first interface detection circuit 50 is connected to the audio decoding chip 30 through the second audio decoding chip control circuit 70. The second audio decoding chip control circuit 70 may include: a seventh resistor R7 and a fifth NMOS transistor Q5.

Specifically, the drain of the fifth NMOS transistor Q5 is connected to the VSS pin 0 of the audio decoding chip 30, the source of the fifth NMOS transistor Q5 is grounded, the gate of the fifth NMOS transistor Q5 and one end of the seventh resistor R7 are connected to the negative CTR control terminal of the first diode D1, and the other end of the seventh resistor R7 is grounded. The No. 9 pin VDDIO of the audio decoding chip 30 is connected with the VCC power supply terminal. The connection relationship of other pins in the circuit can refer to the above embodiments, and is not described herein again.

When the USB Type-C female seat 20 is connected with an analog earphone, and the CTR control end outputs a high level, the Q5 is conducted, the power supply path of the audio decoding chip 30 is conducted, the VCC power end supplies power to the audio decoding chip 30, the audio decoding chip 30 finishes the work of converting digital audio signals into analog audio signals, and the signal switching chip 40 acquires the analog audio signals from the audio decoding chip 30 through the R pin and the L pin and outputs the analog audio signals to the analog earphone connected with the USB Type-C female seat 20; when female seat 20 of USB Type-C connects the digital earphone, when the CTR control end output low level, Q5 turns off, and the supply path of audio frequency decoding chip 30 is disconnected, and the VCC power end stops to the audio frequency decoding chip 30 power supply, and audio frequency decoding chip 30 does not have the power supply and does not work, and signal switching chip 40 obtains digital audio signal from the public head 10 of USB Type-C through D + pin and D-pin to the digital earphone that female seat 20 of USB Type-C is connected is directly exported.

The interface detection control device provided by the embodiment receives the control signal output by the first interface detection circuit through the second audio decoding chip control circuit, controls the power supply of the audio decoding chip according to the control signal, is compatible with an analog earphone and a digital earphone, has high compatibility, can improve the user experience, and only adopts one signal switching chip, thereby simplifying the circuit structure, reducing the volume of the product and reducing the cost of the product.

In one possible implementation, the connection of the cathode of the first diode with the audio decoding chip 30 may include: the negative CTR control terminal of the first diode D1 in the first interface detection circuit 50 is connected to the enable pin of the audio decoding chip 30. When the USB Type-C female socket 20 is connected to an analog earphone and the CTR control terminal outputs a high level, the audio decoding chip is controlled by the enable pin of the audio decoding chip 30 to complete signal conversion; when the USB Type-C female socket 20 is connected with a digital earphone, and the CTR control end outputs a low level, the audio decoding chip is controlled to be out of work through the enabling pin of the audio decoding chip 30.

In one possible implementation, the connection of the cathode of the first diode with the audio decoding chip 30 may include: the negative CTR control terminal of the first diode D1 in the first interface detection circuit 50 is connected to the reset pin of the audio decoding chip 30. When the USB Type-C female socket 20 is connected to an analog earphone and the CTR control terminal outputs a high level, the audio decoding chip is controlled by the reset pin of the audio decoding chip 30 to complete signal conversion; when the USB Type-C female socket 20 is connected with a digital earphone and the CTR control end outputs a low level, the audio decoding chip is controlled to be out of work through the reset pin of the audio decoding chip 30.

In one possible implementation, the connection of the cathode of the first diode with the audio decoding chip 30 may include: the negative CTR control terminal of the first diode D1 in the first interface detection circuit 50 is connected to the analog earphone insertion detection pin of the audio decoding chip 30. When the USB Type-C female socket 20 is connected with an analog earphone and the CTR control end outputs a high level, the analog earphone of the audio decoding chip 30 is inserted into a detection pin to control the audio decoding chip to complete signal conversion; when the USB Type-C female seat 20 is connected with a digital earphone, and the CTR control end outputs a low level, the analog earphone of the audio decoding chip 30 is inserted into the detection pin to control the audio decoding chip not to work.

On the basis of any of the above embodiments, in order to further be compatible with a 3.5mm headset, the interface detection control device may further include: 3.5mm audio interface and second interface detection circuitry. The 3.5mm audio interface is used for connecting a 3.5mm earphone, and the second interface detection circuit is used for detecting the 3.5mm audio interface and sending a control signal to the audio decoding chip 30 and the signal switching chip 40. The following describes in detail an interface detection control device compatible with a 3.5mm audio interface, according to a specific embodiment.

Fig. 4 is a schematic structural diagram of an interface detection control apparatus according to yet another embodiment. As shown in fig. 4, on the basis of the embodiment shown in fig. 2, the apparatus further includes: a 3.5mm audio interface 80 and a second interface detection circuit 90. The second interface detecting circuit 90 may include an eighth resistor R8, a ninth resistor R9, and a second diode D2. One end of the ninth resistor R9 is connected with a VCC power supply end, and the other end is connected with the 3.5mm audio interface 80; one end of the eighth resistor R8 is grounded, and the other end is connected with the anode of the second diode D2 and the 3.5mm audio interface 80; a negative pole CTR control end of the second diode D2 is connected with a control end of the signal switching chip 40, and is used for outputting a control signal to the signal switching chip 40; the cathode CTR control terminal of the second diode D2 is connected to the audio decoding chip 30, and is configured to output a control signal to the audio decoding chip 30.

Optionally, the second diode D1 may be a schottky diode, and the fast response of the earphone during plugging and unplugging may be achieved by using the fast switching speed of the schottky diode.

The specific implementation manner of the connection between the cathode CTR control terminal of the second diode D2 and the audio decoding chip 30 can refer to the implementation manner of the connection between the cathode of the first diode and the audio decoding chip in the above embodiment, for example, the cathode of the first diode can be connected to the audio decoding chip through the first audio decoding chip control circuit, or connected to the audio decoding chip through the second audio decoding chip control circuit, or connected to the enable pin of the audio decoding chip, or connected to the reset pin of the audio decoding chip, or connected to the analog earphone insertion detection pin of the audio decoding chip.

When the 3.5mm audio interface 80 is connected with an earphone, the anode of D2 is at a high level, D2 is conducted, and the CTR control end outputs a high level; when the 3.5mm audio interface 80 is not connected to the earphone, the positive pole of D2 is at low level, D2 is cut off, and the CTR control end outputs low level.

It should be noted that, besides the embodiment shown in fig. 4, there may be various implementations of the apparatus compatible with the 3.5mm audio interface, for example, the 3.5mm audio interface 80 and the second interface detection circuit 90 may be added to the embodiment shown in fig. 3.

On the basis of any of the above embodiments, in order to meet the use requirement of the user for listening to songs and charging at the same time, the interface detection control device may further include: the charging interface and the charging control module. The charging interface is used for connecting a charger, different types of charging interfaces can be set for chargers with different interface types, and the charging interface can be a USB Type-C interface or a micro-USB interface, so that a user can select a proper product according to the Type of the charger, and the resource utilization rate of the product in the transition stage of updating can be improved; the charging control module is used for performing charging negotiation between the terminal device and the charger, the charging control module may determine a charging related parameter, for example, determine a charging power, according to actual performance of the charger and the terminal device, after the negotiation is completed, the charger may charge the terminal device according to the negotiated mode, the charging control module 103 may only include a PD control chip, or only include a QC control chip, or may include both the PD control chip and the QC control chip, specifically, for example, a PD control chip with a fast charging function may be mounted, and may support a charging power of 9V-2A, that is, 18W. The following is a detailed description of a specific embodiment.

Fig. 5 is a schematic structural diagram of an interface detection control device according to another embodiment. As shown in fig. 5, on the basis of the embodiment shown in fig. 2, the apparatus may further include: a charging interface 101 and a charging control module 102. The charging interface 101 is connected with the USB Type-C male connector 10 through the charging control module 102.

It should be noted that, besides the embodiment shown in fig. 5, there may be multiple implementations of the device compatible with the charging function, for example, a charging interface 101 and a charging control module 102 are added on the basis of the embodiment shown in fig. 3 or fig. 4.

The embodiment of the utility model provides a still provide an interface converter, include: a housing and an interface detection control device as described in any of the above embodiments; the interface detection control device is arranged inside the shell. The interface converter provided by the present invention will be described in detail by two specific embodiments.

Fig. 6 is a schematic structural diagram of an interface converter according to an embodiment. As shown in fig. 6, the interface converter includes a housing 100 and an interface detection control device provided in the embodiment shown in fig. 5. The interface detection control device may be fixed inside the housing 100 by welding, bonding, or the like. In order to make the interface converter small in size, the shell can be slightly larger than the interface detection control device, and the shell can be made of metal, plastic and the like. Interface converter passes through the public head 10 of USBType-C, charges interface 101 and the female seat 20 of USBType-C and is connected with the external world. It should be noted that the relative positional relationship between the USB Type-C male connector 10, the charging interface 101, and the USB Type-C female socket 20 may be a chevron structure as shown in fig. 6, or may be a T-Type or F-Type structure.

The interface converter provided by the embodiment can meet the requirements of charging and connecting the earphones at the same time, can be compatible with the analog earphones and the digital earphones, and is small in size and low in cost.

Fig. 7 is a schematic structural diagram of an interface converter according to yet another embodiment. As shown in fig. 7, the interface converter includes a housing 100 and an interface detection control device. The interface detection control device may be fixed inside the housing 100 by welding, bonding, or the like. In order to make the interface converter small in size, the shell can be slightly larger than the interface detection control device, and the shell can be made of metal, plastic and the like. Interface converter passes through the public head 10 of USBType-C, the interface 101 that charges, 20 and 3.5mm audio interface 80 of the female seat of USBType-C and is connected with the external world. It should be noted that the relative position relationship between the USB Type-C male connector 10, the charging interface 101, the USB Type-C female socket 20, and the 3.5mm audio interface 80 may adopt a pi-Type structure as shown in fig. 7, or may adopt other structures.

The interface converter that this embodiment provided not only can satisfy the demand of charging simultaneously and connecting the earphone, supports the earphone of two kinds of interface types of USB Type-C interface and 3.5mm audio interface moreover, and further earphone to USB Type-C interface can compatible analog Type and digit Type, and compatible high and small, with low costs.

It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.

Claims

1. An interface detection control apparatus, comprising:

the USB Type-C public head is used for connecting terminal equipment, the USB Type-C female seat is used for connecting peripheral equipment, the audio decoding chip is used for converting digital audio signals into analog audio signals, the signal switching chip is used for switching between the analog signals and the digital signals, and the first interface detection circuit is used for detecting the USB Type-C female seat;

the audio decoding chip is connected with the USB Type-C male connector, and the signal switching chip is respectively connected with the USB Type-C male connector, the USB Type-C female connector and the audio decoding chip;

2. The apparatus of claim 1, wherein the cathode of the first diode is coupled to an audio decoding chip, comprising:

3. The apparatus of claim 1, wherein the cathode of the first diode is coupled to an audio decoding chip, comprising:

the cathode of the first diode is connected with the audio decoding chip through a second audio decoding chip control circuit, and the second audio decoding chip control circuit is used for controlling power supply of the audio decoding chip and comprises a seventh resistor and a fifth NMOS tube;

4. The apparatus of claim 1, wherein the cathode of the first diode is coupled to an audio decoding chip, comprising:

and the cathode of the first diode is connected with an enabling pin of the audio decoding chip.

5. The apparatus of claim 1, wherein the cathode of the first diode is coupled to an audio decoding chip, comprising:

and the cathode of the first diode is connected with a reset pin of the audio decoding chip.

6. The apparatus of claim 1, wherein the cathode of the first diode is coupled to an audio decoding chip, comprising:

and the cathode of the first diode is connected with an analog earphone insertion detection pin of the audio decoding chip.

7. The apparatus of any of claims 1-6, further comprising: the audio interface detection circuit comprises a 3.5mm audio interface and a second interface detection circuit, wherein the second interface detection circuit is used for detecting the 3.5mm audio interface and comprises an eighth resistor, a ninth resistor and a second diode;

and the cathode of the second diode is connected with the audio decoding chip and used for outputting a control signal to the audio decoding chip.

8. The apparatus of any of claims 1-6, further comprising: and the auxiliary power supply module is used for supplying power to the audio decoding chip and the signal switching chip.

9. The apparatus of any of claims 1-6, further comprising: the charging interface is connected with the USB Type-C male connector through the charging control module.

10. An interface converter, comprising: a housing and an interface detection control apparatus as claimed in any one of claims 1 to 9;

the interface detection control device is arranged inside the shell.