A TYPE C interface composite function application circuit
By using an analog switch and an MCU-controlled TYPE C interface composite function circuit, the problem of the single function of the TYPE C interface in Bluetooth speakers is solved, realizing multi-functional integration, reducing costs and improving ease of use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FIRST AUDIO MFG CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-05-26
AI Technical Summary
The TYPE C interface in existing Bluetooth speakers has a single function and cannot simultaneously meet the needs of charging, USB flash drive reading, sound card playback and tuning. Furthermore, disassembling the device for tuning carries risks, and space is limited, making it impossible to integrate both USB and TYPE interfaces at the same time.
This circuit employs an analog transfer switch and an MCU-controlled TYPE C interface for composite functions. Data conversion is achieved via buttons, eliminating the need for a USB A interface and integrating multiple functions into one unit, thus reducing space requirements.
It enables multi-functional applications of the TYPE C interface, reduces costs, avoids the risks of disassembling and tuning, and improves ease of use.
Smart Images
Figure CN224287516U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic technology, and in particular to a composite function circuit for the TYPE C interface in a Bluetooth speaker. Background Technology
[0002] In current Bluetooth speakers, the Type-C interface is becoming increasingly common, serving not only for charging lithium batteries but also for USB flash drive reading, sound card playback, system upgrades and tuning, and charging external devices. Most manufacturers add a USB-A port to the Type-C connector for charging and USB flash drive playback. Tuning is often done by adding a power strip to the PCBA board, which is inconvenient when the speaker is not installed. If the sound is unsatisfactory, disassembly is required, risking further damage. Small Bluetooth speakers simply don't have enough space to accommodate both Type-C and USB ports simultaneously. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to provide a TYPE C interface composite function application circuit.
[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a TYPE-C interface composite function application circuit, including a first conversion analog switch U1 and a second conversion analog switch U2. The D+ pin of the TYPE-C interface is connected to pin 6 of the first conversion analog switch U1, the D- pin of the TYPE-C interface is connected to pin 4 of the first conversion analog switch U1, pin 8 of the first conversion analog switch U1 is connected to pin 6 of the second conversion analog switch U2, and pin 2 of the first conversion analog switch U1 is connected to pin 4 of the second conversion analog switch U2. Pins 1 of both the first conversion analog switch U1 and pin 1 of the second conversion analog switch U2 are controlled by an MCU. The principle of this utility model is: using analog conversion switches and MCU control, it is convenient and intelligent, can eliminate the USB-A interface, reduce costs and space; the serial port can be placed externally, and data conversion can be achieved through buttons, meeting various functional applications.
[0005] As an improvement, the first analog switch U1 and the second analog switch U2 are of the same model and are both FSUSB30.
[0006] The beneficial effects of this utility model compared with the prior art are:
[0007] It adopts analog conversion switches and MCU control, which is convenient and intelligent. The USB A interface can be eliminated, reducing costs and space. The serial port can be placed on the outside of the machine, and the required data conversion can be achieved by buttons, meeting various functional applications. Attached Figure Description
[0008] Figure 1 This is the circuit diagram of this utility model. Detailed Implementation
[0009] The present invention will be further described below with reference to the accompanying drawings.
[0010] like Figure 1 As shown, a TYPE-C interface composite function application circuit includes a first conversion analog switch U1 and a second conversion analog switch U2. The first conversion analog switch U1 and the second conversion analog switch U2 are of the same model and are both FSUSB30. The FSUSB30 has the following pins: pin 6 (D-), pin 4 (D+), pin 10 (Vcc), pin 9 (nOE), pin 5 (Gnd), pin 8 (D1-), pin 2 (D1+), pin 7 (D2-), pin 3 (D2+), and pin 1 (sel). The TYPE-C interface pin D+ is connected to pin 6 of the first conversion analog switch U1 via a transformer L, and the TYPE-C interface pin D- is connected to pin 4 of the first conversion analog switch U1 via a transformer L. Pin 8 of the first conversion analog switch U1 is connected to pin 6 of the second conversion analog switch U2, and pin 2 of the first conversion analog switch U1 is connected to pin 4 of the second conversion analog switch U2. Pins 1 of both the first conversion analog switch U1 and pin 1 of the second conversion analog switch U2 are controlled by an MCU. Data outputs D+ / D- or serial port outputs RX / TX are selected from two outputs via an internal analog conversion switch. When low, D- and D1- are connected, and D+ and D1+ are connected; when high, D- and D2- are connected, and D+ and D2+ are connected. When the IC FSUSB30 is not powered, D+ / D- are not connected to D1+, D1-, D2+, or D2-. The MCU can control USB_SEL_PD / USB_SEL_DSP to enable communication between the TYPE C port and different ICs, thereby achieving various functions such as charging, audio tuning, and software upgrades.
[0011] The principle of this invention is as follows: It adopts an analog conversion switch and MCU control, which is convenient and intelligent. It can eliminate the USB A interface, reduce costs and space. The serial port can be placed outside the machine, and the required data conversion can be realized by buttons to meet various functional applications.
Claims
1. A TYPE C interface composite function application circuit, characterized by: It includes a first analog switch U1 and a second analog switch U2. The D+ pin of the TYPE C interface is connected to pin 6 of the first analog switch U1, the D- pin of the TYPE C interface is connected to pin 4 of the first analog switch U1, the 8th pin of the first analog switch U1 is connected to pin 6 of the second analog switch U2, the 2nd pin of the first analog switch U1 is connected to pin 4 of the second analog switch U2, and pin 1 of both the first analog switch U1 and the second analog switch U2 are controlled by the MCU. 2.The TYPE C interface composite function application circuit according to claim 1, characterized in that: The first analog switch U1 and the second analog switch U2 are of the same model and are both FSUSB30.