Usb fast charging wall socket device with data transfer storage

Abstract

The utility model relates to a USB fast charging wall socket device of realization data transmission storage, including rectifier filter circuit, switching power supply circuit, synchronous rectifier circuit, isolation feedback circuit, MCU control circuit, USB interface circuit and first transformer TR1, rectifier filter circuit is connected with switching power supply circuit, rectifier filter circuit and switching power supply circuit all are connected with the primary of first transformer TR1, synchronous rectifier circuit is connected with the secondary of first transformer TR1, MCU control circuit is connected with synchronous rectifier circuit, isolation feedback circuit is connected with MCU control circuit, isolation feedback circuit is also connected with switching power supply circuit, USB interface circuit is connected with MCU control circuit.

Description

Technical Field

[0001] This utility model relates to the field of smart wall sockets, and more particularly to the field of USB fast charging technology in the base box, specifically referring to a USB fast charging wall socket device that can realize data transmission and storage. Background Technology

[0002] USB fast charging technology significantly shortens charging time while ensuring the safety of electrical devices and batteries through power enhancement and intelligent dynamic voltage and current management. It has become a standard feature of modern electronic devices and an indispensable infrastructure in modern life.

[0003] Currently, USB wall sockets on the market only support charging and cannot handle data transfer and storage. A smart wall socket integrating both USB charging and data transfer / storage functions fills a gap in the industry. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a USB fast charging wall socket device that is simple in structure, easy to operate, and has a wide range of applications, enabling data transmission and storage.

[0005] To achieve the above objectives, the USB fast charging wall socket device of this utility model that enables data transmission and storage is as follows: This USB fast-charging wall socket device, capable of data transmission and storage, is characterized by comprising a rectifier and filter circuit, a switching power supply circuit, a synchronous rectifier circuit, an isolation feedback circuit, an MCU control circuit, a USB interface circuit, and a first transformer TR1. The rectifier and filter circuit is connected to the switching power supply circuit, and both the rectifier and filter circuit and the switching power supply circuit are connected to the primary winding of the first transformer TR1. The synchronous rectifier circuit is connected to the secondary winding of the first transformer TR1. The MCU control circuit is connected to the synchronous rectifier circuit. The isolation feedback circuit is connected to the MCU control circuit and is also connected to the switching power supply circuit. The USB interface circuit is connected to the MCU control circuit.

[0006] Preferably, the rectifier and filter circuit receives the AC input voltage and obtains the input DC voltage; the switching power supply circuit controls the switching on and off and supplies power to the first transformer TR1; the first transformer TR1 receives the input DC voltage and outputs it to the synchronous rectifier circuit; the synchronous rectifier circuit performs synchronous rectification to obtain the output DC voltage; the MCU control circuit controls the interface of the USB interface circuit; and the MCU control circuit feeds back the output DC voltage to the switching power supply circuit in real time through an isolation feedback circuit.

[0007] Preferably, the device further includes a first polarized capacitor CE1, a second resistor R2, a first diode D1, a first MOSFET Q1, a third resistor R3, and a fourth resistor R4. The first polarized capacitor CE1 is connected to the rectifier filter circuit, the positive terminal of the first polarized capacitor CE1 is connected to the primary winding of the first transformer TR1, and the negative terminal of the first polarized capacitor CE1 is grounded. The second resistor R2 is connected to the switching power supply circuit. The positive terminal of the first diode D1 is connected to the second resistor R2, and the negative terminal of the first diode D1 is connected to the primary winding of the first transformer TR1. The gate of the first MOSFET Q1 is connected to the third resistor R3, and the other end of the third resistor R3 is connected to the switching power supply circuit. The source of the first MOSFET Q1 is connected to the fourth resistor R4, and the other end of the fourth resistor R4 is grounded. The drain of the first MOSFET Q1 is connected to the primary winding of the first transformer TR1.

[0008] Preferably, the synchronous rectification circuit includes a second MOSFET Q2, a second capacitor C2, a fifth resistor R5, and a second polarized capacitor CE2. The gate of the second MOSFET Q2 is connected to the MCU control circuit, the drain of the second MOSFET Q2 is connected to the secondary winding of the first transformer TR1, and the source of the second MOSFET Q2 is grounded. The second capacitor C2 is connected to the fifth resistor R5, the other end of the second capacitor C2 is connected to the MCU control circuit, the fifth resistor R5 is grounded, the positive terminal of the second polarized capacitor CE2 is connected to the secondary winding of the first transformer TR1, and the negative terminal of the second polarized capacitor CE2 is grounded.

[0009] Preferably, the MCU control circuit integrates a USB PD controller. The USB interface circuit includes a USB-C1 interface, a USB-C2 interface, a third MOSFET Q3, a fourth MOSFET Q4, a sixth resistor R6, and a seventh resistor R7. The gates of the third MOSFET Q3 and the fourth MOSFET Q4 are both connected to the MCU control circuit and the USB PD controller. The drains of the third MOSFET Q3 and the fourth MOSFET Q4 are both connected to the secondary winding of the first transformer TR1. The source of the third MOSFET Q3 is connected to the USB-C1 interface, and the source of the fourth MOSFET Q4 is connected to the USB-C2 interface. The sixth resistor R6 is connected between the USB-C1 interface and the MCU control circuit, and the seventh resistor R7 is connected between the USB-C2 interface and the MCU control circuit. Preferably, the isolation feedback circuit includes a first optocoupler U1, the light-emitting diode of the first optocoupler U1 is connected to the MCU control circuit, and the phototransistor of the first optocoupler U1 is connected to the switching power supply circuit.

[0010] This invention relates to a USB fast-charging wall socket device that integrates USB charging and data transfer / storage functions into a single device, allowing users to easily back up data while charging. This invention is a wall-mounted device based on an 86-type chassis or a similar chassis. Furthermore, while fast charging mobile phones, tablets, computers, and other devices, users can also access files. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the module of the USB fast charging wall socket device of this utility model that enables data transmission and storage.

[0012] Figure 2 This is a schematic diagram of the structure of the USB fast charging wall socket device of this utility model that enables data transmission and storage.

[0013] Figure 3 This is a typical block diagram illustrating an example application of the USB fast charging wall socket device of this utility model that enables data transmission and storage.

[0014] Figure 4 This is a schematic diagram of the external structure of the USB fast charging wall socket device of this utility model that enables data transmission and storage.

[0015] Figure 5 This is a schematic diagram of the internal structure of the USB fast charging wall socket device of this utility model that enables data transmission and storage. Detailed Implementation

[0016] To more clearly describe the technical content of this utility model, the following description is provided in conjunction with specific embodiments.

[0017] This utility model discloses a USB fast charging wall socket device capable of data transmission and storage, comprising a rectifier and filter circuit, a switching power supply circuit, a synchronous rectifier circuit, an isolation feedback circuit, an MCU control circuit, a USB interface circuit, and a first transformer TR1. The rectifier and filter circuit is connected to the switching power supply circuit, and both the rectifier and filter circuit and the switching power supply circuit are connected to the primary winding of the first transformer TR1. The synchronous rectifier circuit is connected to the secondary winding of the first transformer TR1. The MCU control circuit is connected to the synchronous rectifier circuit. The isolation feedback circuit is connected to the MCU control circuit and is also connected to the switching power supply circuit. The USB interface circuit is connected to the MCU control circuit.

[0018] In a preferred embodiment of this utility model, the rectifier and filter circuit receives the AC input voltage and obtains the input DC voltage; the switching power supply circuit controls the switching on and off and supplies power to the first transformer TR1; the first transformer TR1 receives the input DC voltage and outputs it to the synchronous rectifier circuit; the synchronous rectifier circuit performs synchronous rectification to obtain the output DC voltage; the MCU control circuit controls the interface of the USB interface circuit; and the MCU control circuit feeds back the output DC voltage to the switching power supply circuit in real time through an isolation feedback circuit.

[0019] In a preferred embodiment of this utility model, the device further includes a first polarized capacitor CE1, a second resistor R2, a first diode D1, a first MOSFET Q1, a third resistor R3, and a fourth resistor R4. The first polarized capacitor CE1 is connected to the rectifier filter circuit, the positive terminal of the first polarized capacitor CE1 is connected to the primary winding of the first transformer TR1, and the negative terminal of the first polarized capacitor CE1 is grounded. The second resistor R2 is connected to the switching power supply circuit. The positive terminal of the first diode D1 is connected to the second resistor R2, and the negative terminal of the first diode D1 is connected to the primary winding of the first transformer TR1. The gate of the first MOSFET Q1 is connected to the third resistor R3, the other end of the third resistor R3 is connected to the switching power supply circuit, the source of the first MOSFET Q1 is connected to the fourth resistor R4, the other end of the fourth resistor R4 is grounded, and the drain of the first MOSFET Q1 is connected to the primary winding of the first transformer TR1.

[0020] In a preferred embodiment of this utility model, the synchronous rectification circuit includes a second MOSFET Q2, a second capacitor C2, a fifth resistor R5, and a second polarized capacitor CE2. The gate of the second MOSFET Q2 is connected to the MCU control circuit, the drain of the second MOSFET Q2 is connected to the secondary winding of the first transformer TR1, and the source of the second MOSFET Q2 is grounded. The second capacitor C2 is connected to the fifth resistor R5, the other end of the second capacitor C2 is connected to the MCU control circuit, the fifth resistor R5 is grounded, the positive terminal of the second polarized capacitor CE2 is connected to the secondary winding of the first transformer TR1, and the negative terminal of the second polarized capacitor CE2 is grounded.

[0021] In a preferred embodiment of this utility model, the MCU control circuit incorporates a USB PD controller. The USB interface circuit includes a USB-C1 interface, a USB-C2 interface, a third MOSFET Q3, a fourth MOSFET Q4, a sixth resistor R6, and a seventh resistor R7. The gates of the third MOSFET Q3 and the fourth MOSFET Q4 are both connected to the MCU control circuit and the USB PD controller. The drains of the third MOSFET Q3 and the fourth MOSFET Q4 are both connected to the secondary winding of the first transformer TR1. The source of the third MOSFET Q3 is connected to the USB-C1 interface, and the source of the fourth MOSFET Q4 is connected to the USB-C2 interface. The sixth resistor R6 is connected between the USB-C1 interface and the MCU control circuit, and the seventh resistor R7 is connected between the USB-C2 interface and the MCU control circuit. In a preferred embodiment of the present invention, the isolation feedback circuit includes a first optocoupler U1, wherein the light-emitting diode of the first optocoupler U1 is connected to the MCU control circuit, and the photosensitive tube of the first optocoupler U1 is connected to the switching power supply circuit.

[0022] This experimental novel USB fast charging power supply is based on an 86-type chassis or similar chassis and has several USB ports. The USB switching power supply converts the AC power into low-voltage DC power, which powers the fast charging ports. The MCU control circuit manages charging and data transmission and storage. The MCU control circuit controls the CC pin to perform fast charging protocol handshake and configuration, and simultaneously uses the DP / DM / TX± / RX± pins to realize high-speed USB data transmission, storing the data in the storage unit, thereby realizing the device's fast charging and data transmission and storage functions.

[0023] like Figure 1 As shown, the input AC mains power is rectified and filtered to obtain the input DC voltage. This DC voltage is then converted by the switching power supply circuit and the high-frequency rectifier and filter circuit to obtain the output DC voltage. An isolation feedback circuit feeds the output DC voltage back to the switching power supply circuit. The MCU control circuit manages charging and data transmission / storage, thus enabling the power socket to perform fast charging and data transmission / storage functions.

[0024] Figure 2 This is a front view of the device, where USB-C1 and USB-C2 are the fast charging interfaces.

[0025] Figure 3 This is a reverse view of the device, where the L and N interfaces are connected to AC mains power.

[0026] In this specific embodiment of the present invention, a 65W wall-mounted charging socket is used, employing an AC-DC switching power supply as the main power architecture. The power output consists of two USB-C ports, and an MCU control circuit manages charging and data transmission (e.g., ...). Figure 4 (As shown). The specific power allocation is as follows: USB-C1 port: Based on PD and other fast charging protocols, it can output a maximum of 65W (20V / 3.25A) fast charging.

[0027] USB-C2 port: Based on PD and other fast charging protocols, it can output a maximum of 65W (20V / 3.25A) fast charging.

[0028] After the AC input is rectified and filtered, a DC voltage is obtained across the first polarity capacitor CE1. The switching power supply circuit is powered through the second resistor R2 and the first diode D1. The DC voltage on the primary side is used to power the secondary side after the switching power supply circuit controls the switching of the first MOSFET Q1 and the first transformer TR1. The secondary side uses synchronous rectification, and the MCU control circuit synchronously controls the second MOSFET Q2 to improve efficiency and reduce temperature rise.

[0029] After synchronous rectification, an output DC voltage is obtained at the second polarity capacitor CE2. This voltage is connected to the subsequent stage. The MCU integrates fast charging protocol function and has a built-in USB PD controller to control three VBUS switching transistors Q3 and Q4 to control two USB-C and one USB-A interfaces. The MCU reads the DP / DM / CC signals sent by the device, identifies the protocol type and negotiates the maximum supported power. The output voltage is controlled by the feedback control circuit. The voltage across the second polarity capacitor CE2 is fed back to the switching power supply circuit in real time through the first optocoupler U1 to achieve cyclic control.

[0030] The MCU can detect whether a device is inserted into the USB-C1 and USB-C2 interfaces by detecting the voltage and current changes of the sixth resistor R6 and the seventh resistor R7. Once a device is confirmed to be inserted into the USB port, the MCU controls the corresponding VBUS switch transistors (first MOSFET Q1 and second MOSFET Q2) to turn on and supply power to the device.

[0031] The MCU detects whether the connected device supports fast charging protocols such as USB PD via the CC pin. If supported, the host and device will perform a protocol handshake via the CC pin. The MCU sends a query to the device to inquire about the supported voltage and current combinations. Upon receiving the message, the device sends a response message on the CC pin. Based on the device's response message, the MCU selects the appropriate voltage and current combination and sends a message to inform the device. The device adjusts its output voltage and current according to the MCU's request to negotiate the charging power. During the charging process, the MCU and the device communicate in real time via the CC pin to dynamically adjust the charging power and ensure safe and efficient charging.

[0032] The MCU determines the type of connected device (host / device) by detecting the CC pin level and resistor configuration. If the CC pin is pulled down by the bias resistor, and a low CC level is detected, the device is identified (e.g., phone / tablet). A high CC level is detected, and the host is identified (e.g., USB flash drive / power bank). Whether data transfer is possible depends on the device type and user operation.

[0033] When a mobile phone / tablet or other device is plugged into a USB-C port, the MCU detects the signal change on the USB bus, identifies the device insertion and type, and establishes a connection between the MCU and the device. The MCU first sends a control request data packet to the device, containing information such as the request type and request parameters. If the device responds, confirming that it supports data transmission, it receives the data packet, processes it according to the request type, and returns the response data to the MCU via the DP / DM or RX / TX signal lines. If the device does not respond, it does not support data transmission to the USB connector.

[0034] The USB-C interface uses DP / DM pins to support USB 2.0 full-speed / high-speed data transfer; the USB-C interface uses four pairs of differential signal lines, namely TX1+ / -, TX2+ / -, RX1+ / -, and RX2+ / -, to support USB 3.0 and above high-speed data transfer.

[0035] like Figure 2 As shown, the device also includes a SNUBBER circuit to absorb voltage spikes from the transformer leakage inductance, reducing voltage / current stress on the Q1 switching transistor. The rapid switching of the power supply circuit causes EMI interference; the SNUBBER circuit can absorb leakage inductance voltage spikes, resolving voltage / current stress and high-frequency oscillation issues during the Q1 switching process.

[0036] The device also includes a data storage circuit, which is connected to the MCU control circuit. The data storage circuit is used to store and retrieve data information at the device end, and does not involve data from computer programs.

[0037] Users can manage the data stored in the USB smart socket's storage unit through the device, and can also store data from the device to the USB smart socket. The data stored in the USB can be used as other peripherals, and can back up important data (such as contacts / photos / videos / documents) from devices such as mobile phones, tablets, and laptops to the USB smart socket's storage unit while keeping the device fully charged.

[0038] Users can also connect the USB socket or USB-C port for data storage to the router via an adapter cable to enable the router's file sharing function (Samba / FTP), configure remote access, and access it through an FTP / Samba client or browser to provide remote access functionality.

[0039] For the specific implementation scheme of this embodiment, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0040] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0041] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means at least two.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] This invention relates to a USB fast-charging wall socket device that integrates USB charging and data transfer / storage functions into a single device, allowing users to easily back up data while charging. This invention is a wall-mounted device based on an 86-type chassis or a similar chassis. Furthermore, while fast charging mobile phones, tablets, computers, and other devices, users can also access files.

[0044] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.

Claims

1. A USB fast charging wall socket device capable of data transmission and storage, characterized in that, The device includes a rectifier and filter circuit, a switching power supply circuit, a synchronous rectifier circuit, an isolation feedback circuit, an MCU control circuit, a USB interface circuit, and a first transformer TR1. The rectifier and filter circuit is connected to the switching power supply circuit, and both the rectifier and filter circuit and the switching power supply circuit are connected to the primary winding of the first transformer TR1. The synchronous rectifier circuit is connected to the secondary winding of the first transformer TR1. The MCU control circuit is connected to the synchronous rectifier circuit. The isolation feedback circuit is connected to the MCU control circuit and is also connected to the switching power supply circuit. The USB interface circuit is connected to the MCU control circuit.

2. The USB fast charging wall socket device capable of data transmission and storage according to claim 1, characterized in that, The rectifier and filter circuit receives AC input voltage and obtains input DC voltage. The switching power supply circuit controls the switch to turn on and off and supplies power to the first transformer TR1. The first transformer TR1 receives the input DC voltage and outputs it to the synchronous rectifier circuit. The synchronous rectifier circuit performs synchronous rectification to obtain the output DC voltage. The MCU control circuit controls the interface of the USB interface circuit. The MCU control circuit feeds back the output DC voltage to the switching power supply circuit in real time through the isolation feedback circuit.

3. The USB fast charging wall socket device capable of data transmission and storage according to claim 1, characterized in that, The device further includes a first polarized capacitor CE1, a second resistor R2, a first diode D1, a first MOSFET Q1, a third resistor R3, and a fourth resistor R4. The first polarized capacitor CE1 is connected to the rectifier filter circuit, the positive terminal of the first polarized capacitor CE1 is connected to the primary of the first transformer TR1, and the negative terminal of the first polarized capacitor CE1 is grounded. The second resistor R2 is connected to the switching power supply circuit. The positive terminal of the first diode D1 is connected to the second resistor R2, and the negative terminal of the first diode D1 is connected to the primary of the first transformer TR1. The gate of the first MOSFET Q1 is connected to the third resistor R3, and the other end of the third resistor R3 is connected to the switching power supply circuit. The source of the first MOSFET Q1 is connected to the fourth resistor R4, and the other end of the fourth resistor R4 is grounded. The drain of the first MOSFET Q1 is connected to the primary of the first transformer TR1.

4. The USB fast charging wall socket device capable of data transmission and storage according to claim 1, characterized in that, The synchronous rectification circuit includes a second MOSFET Q2, a second capacitor C2, a fifth resistor R5, and a second polarized capacitor CE2. The gate of the second MOSFET Q2 is connected to the MCU control circuit, the drain of the second MOSFET Q2 is connected to the secondary winding of the first transformer TR1, and the source of the second MOSFET Q2 is grounded. The second capacitor C2 is connected to the fifth resistor R5, and the other end of the second capacitor C2 is connected to the MCU control circuit. The fifth resistor R5 is grounded. The positive terminal of the second polarized capacitor CE2 is connected to the secondary winding of the first transformer TR1, and the negative terminal of the second polarized capacitor CE2 is grounded.

5. The USB fast charging wall socket device capable of data transmission and storage according to claim 1, characterized in that, The MCU control circuit incorporates a USB PD controller. The USB interface circuit includes a USB-C1 interface, a USB-C2 interface, a third MOSFET Q3, a fourth MOSFET Q4, a sixth resistor R6, and a seventh resistor R7. The gates of the third MOSFET Q3 and the fourth MOSFET Q4 are connected to the MCU control circuit and the USB PD controller. The drains of the third MOSFET Q3 and the fourth MOSFET Q4 are connected to the secondary winding of the first transformer TR1. The source of the third MOSFET Q3 is connected to the USB-C1 interface, and the source of the fourth MOSFET Q4 is connected to the USB-C2 interface. The sixth resistor R6 is connected between the USB-C1 interface and the MCU control circuit, and the seventh resistor R7 is connected between the USB-C2 interface and the MCU control circuit.

6. The USB fast charging wall socket device capable of data transmission and storage according to claim 1, characterized in that, The isolation feedback circuit includes a first optocoupler U1, the light-emitting diode of the first optocoupler U1 is connected to the MCU control circuit, and the phototransistor of the first optocoupler U1 is connected to the switching power supply circuit.

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