Internet-of-things voltage conversion circuit based on PD protocol electricity taking

Abstract

The utility model relates to an internet-of-things voltage conversion circuit for PD protocol power taking, which belongs to the technical field of power supplies and comprises a voltage decoy module, a voltage conversion module and an internet-of-things function module. The voltage decoy module is connected with the voltage conversion module, and the voltage conversion module is connected with the internet-of-things function module. The utility model overcomes the problem that direct current power supply equipment depends on commercial power for power supply, and provides a miniature direct current power supply design for realizing multipath output under common voltage requirements of 3.3 V / 5V / 12V and the like. The device has the following advantages: (1) the device has a PD protocol power taking function, and the device can use a mobile power supply supporting a PD protocol to supply power to overcome the commercial power to work; (2) a plurality of different power supply conversion chips are used, so that multi-structure and multi-channel voltage output is realized; and (3) modular design is adopted, and the equipment is compact.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to an Internet of Things voltage conversion circuit for obtaining power through a PD protocol. Background Art

[0002] At present, DC power supply equipment is widely used in electromechanical equipment research and development, electronic information professional higher education, electronic device maintenance and testing and other industries to provide users with low voltage output. However, with the continuous iteration of user terminal equipment, the problem of DC power supply application adaptation has gradually become prominent.

[0003] First, most DC power supply equipment uses AC power supply. If the AC power fails, the related equipment will not be able to work normally, which will delay normal production operations. For example, when repairing the driver of electromechanical equipment, 24V DC power supply is required. Maintenance personnel often use switching power supply blocks and DC adjustable power supplies. If there is a "power outage for maintenance" or "cable damage", normal production operations will be delayed.

[0004] Secondly, most DC power supplies provide dual-channel wide voltage output, which cannot meet the needs of some users. For example, in the electronic information higher education industry, when students participate in electronic circuit design competitions such as the "National College Student Electronic Circuit Design Competition" and the "China College Student Computer Design Competition", they often need 3.3V / 5V / 12V multi-channel output voltage supply. If a DC power supply is used, there is a problem of "too few output channels". If the onboard power supply of the competition equipment is used, there is a problem of "insufficient output power". Students often use multiple DC power supply devices for power supply, which is a cumbersome process.

[0005] Finally, most DC power supply devices are large in size, occupying more maintenance and experimental space. In addition, the user interface is mainly based on buttons, which leads to poor human-computer interaction experience when the working space is small. Utility Model Content

[0006] In order to solve the above-mentioned problems in the prior art, the utility model provides an Internet of Things voltage conversion circuit for obtaining power according to the PD protocol.

[0007] A physical connection voltage conversion circuit for obtaining power using a PD protocol, comprising:

[0008] A voltage deception module, a voltage conversion module and an Internet of Things function module; the voltage deception module is connected to the voltage conversion module, and the voltage conversion module is connected to the Internet of Things function module.

[0009] Furthermore, the voltage deception module includes a USB-TypeC interface U2, a deception chip U1 and a voltage output interface CN1; the USB-TypeC interface U2 is connected to a power source and the deception chip U1; the voltage output interface CN1 is connected to the deception chip U1 and the voltage conversion module.

[0010] Furthermore, the voltage deception module also includes a CC1 channel pull-up resistor R1, a CC2 channel pull-up resistor R2, a working mode configuration resistor R3, a working mode configuration resistor R4, a voltage deception filter capacitor C1, a voltage deception filter capacitor C2 and a PMOS switch tube Q1; the deception chip U1 is connected to the working mode configuration resistor R3 and the working mode configuration resistor R4, and the working mode configuration resistor R3 is connected to the working mode configuration resistor R4; the deception chip U1 is respectively connected to the CC1 channel pull-up resistor R1 and the CC2 channel pull-up resistor R2; the USB-TypeC interface U2 is respectively connected to the CC1 channel pull-up resistor R1 and the CC2 channel pull-up resistor R2; the PMOS switch tube Q1 is connected to the deception chip U1; the voltage deception filter capacitor C1 is connected to the deception chip U1 and the PMOS switch tube Q1; the voltage deception filter capacitor C2 is connected to the deception chip U2 and the PMOS switch tube Q1.

[0011] Furthermore, the voltage conversion module includes a 5V-LDO conversion structure, a 5V-DC-DC conversion structure, a 12V-DC-DC conversion structure, a capacitive feedback structure, a resistor feedback structure, a fuse F1 and a voltage input interface U11; the voltage input interface U11 is connected to the voltage spoofing module and the fuse F1; the fuse F1 is connected to the 5V-LDO conversion structure, the 5V-DC-DC conversion structure and the 12V-DC-DC conversion structure, the capacitive feedback structure is connected to the 5V-DC-DC conversion structure, and the resistor feedback structure is connected to the 12V-DC-DC conversion structure.

[0012] Further, the 5V-LDO conversion structure includes an LDO type conversion chip U3, a filter capacitor C13, a filter capacitor C14, a filter capacitor C15, a filter capacitor C16 and a voltage output interface U8 connected in sequence; the 5V-DC-DC conversion structure includes a filter capacitor C1, a filter capacitor C2, a filter capacitor C3, a DC-DC conversion chip U2, a current limiting resistor R5, a storage capacitor C9, a conversion inductor L1, a filter capacitor C6, a filter capacitor C7, a filter capacitor C8 and a voltage output interface U10 connected in sequence; The 12V-DC-DC conversion structure includes a DC-DC conversion chip U1, a current limiting resistor R6, a decoupling capacitor C11, an energy storage capacitor C10, a conversion inductor L2, a filter capacitor C18, a filter capacitor C17 and a voltage output interface U9. The DC-DC conversion chip U1 is respectively connected to the current limiting resistor R6, the decoupling capacitor C11, the energy storage capacitor C10, the conversion inductor L2, and the filter capacitor C18. The energy storage capacitor C10 is connected to the conversion inductor L2, and the filter capacitor C17 is connected to the filter capacitor C18 and the voltage output interface U9.

[0013] Furthermore, the capacitive feedback structure includes a voltage-dividing sampling resistor R3, a voltage-dividing sampling resistor R4 and an energy storage capacitor C5, the voltage-dividing sampling resistor R3 is connected in series with the voltage-dividing sampling resistor R4, and the voltage-dividing sampling resistor R3 is connected in parallel with the energy storage capacitor C5; the resistor feedback structure includes a connected voltage-dividing sampling resistor R7 and a voltage-dividing sampling resistor R8.

[0014] Furthermore, the IoT functional module includes an embedded core U1 and a voltage output interface U2, an embedded core control signal output interface U3, an embedded core control signal output interface U4, a display screen control signal output interface U5, a sensor device, a conversion chip U16, a voltage input interface U17, a voltage input interface U18, a voltage input interface U19, a key switch SW1, a key switch SW2 and a key switch SW3 connected thereto; the voltage input interface U17 is connected to the voltage output interface U10 of the voltage conversion module; the voltage input interface U18 is connected to the voltage output interface U9 of the voltage conversion module; the voltage input interface U19 is connected to the voltage output interface U8 of the voltage conversion module; the voltage input interface U19 is connected to the conversion chip U16; the voltage input interface U19 is connected to the sensor device to power the sensor device.

[0015] Furthermore, the sensor device includes a temperature and humidity sensor and a Hall current sensor.

[0016] Furthermore, the voltage deception module, voltage conversion module and Internet of Things function module are provided with 4 copper pillars.

[0017] Beneficial effects of the utility model: The utility model overcomes the problem that DC power supply equipment relies on mains power supply, and proposes a small DC power supply design that realizes multi-channel output under common voltage requirements such as 3.3V / 5V / 12V. It has the following advantages: (1) It has the PD protocol power supply function, and the device can use a mobile power supply that supports the PD protocol to overcome the mains power supply; (2) It uses multiple different power conversion chips to have multi-structure and multi-channel voltage output; (3) It adopts a modular design, and the device is pocket-sized. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 This is the circuit schematic diagram of the voltage deception module;

[0020] Figure 3 It is a flow chart of voltage deception;

[0021] Figure 4 This is the circuit schematic diagram of the voltage conversion module;

[0022] Figure 5This is the circuit schematic diagram of the IoT functional module. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In this embodiment, refer to Figure 1 , an IoT voltage conversion circuit for PD protocol power supply, including: a voltage deception module, a voltage conversion module and an IoT function module; the voltage deception module is connected to the voltage conversion module, and the voltage conversion module is connected to the IoT function module.

[0025] like Figure 2 and Figure 3 As shown, in the voltage deception module, DFP devices such as mobile power supplies are connected to the voltage deception module through the USB-TypeC interface U2, and the IP2721 deception chip U1 determines the chip's highest deception voltage setting by identifying whether the working mode configuration resistor R3 and the working mode configuration resistor R4 exist. After that, the IP2721 deception chip U1 realizes the pairing communication between the DFP device and the voltage deception module by controlling the input current of the CC1 channel pull-up resistor R1 and the CC2 channel pull-up resistor R2. After the communication is successful, the IP2721 deception chip U1 will control the PMOS switch tube Q1 to turn on, and input the high input voltage obtained by deception into the voltage conversion module through the XH2.54 voltage output interface CN1. M3 copper pillars U3, M3 copper pillars U4, M3 copper pillars U5, and M3 copper pillars U6 are used to fix the plate. The voltage deception module is connected to the voltage conversion module through the XH2.54 voltage output interface CN1.

[0026] like Figure 4As shown, in the voltage conversion module, the original input voltage is obtained from the voltage deception module through the XH2.54 voltage input interface U11, and connected to the back-end components through the fuse F1. After the original input voltage flows into the LM7805 LDO type conversion chip U3 after passing through the filter capacitor C13 and the filter capacitor C14, the chip will output a 5V voltage signal and connect it to the XH2.54-5V voltage output interface U8 through the filter capacitor C15 and the filter capacitor C16. After the original input voltage passes through the filter capacitor C1, the filter capacitor C2, and the filter capacitor C3, it flows into the MP2236 Buck type DC-DC conversion chip U2. The voltage-dividing sampling resistor R1, the voltage-dividing sampling resistor R2, and the decoupling capacitor C4 are connected to the conversion chip U2 to ensure the normal operation of the chip. The voltage-dividing sampling resistor R3, the voltage-dividing sampling resistor R4, and the energy storage capacitor C5 constitute a capacitive feedback structure, which feeds back the converted output voltage to the MP2236 Buck type DC-DC conversion chip U2 in real time. Energy storage capacitor C9, current limiting resistor R5, and conversion inductor L1 are used to form the main conversion structure for the MP2236 Buck DC-DC conversion chip U2 to achieve 5V output. After conversion, the voltage flows through filter capacitor C6, filter capacitor C7, filter capacitor C8 and is connected to the XH2.54-5V voltage output interface U10. When the original input voltage passes through filter capacitor C12, it flows into the MP3438 Boost DC-DC conversion chip U1. Current limiting resistor R6 and decoupling capacitor C11 are connected to the conversion chip U2 to ensure the normal operation of the chip. Voltage dividing sampling resistor R7 and voltage dividing sampling resistor R8 form a resistor feedback structure to feed back the converted output voltage to the MP3438 Boost DC-DC conversion chip U1 in real time. The energy storage capacitor C10 and the conversion inductor L2 are used to form the main conversion structure for the MP3438 Boost type DC-DC conversion chip U1 to achieve 12V output. After conversion, the voltage flows through the filter capacitor C17 and the filter capacitor C18 and is connected to the XH2.54-5V voltage output interface U9. M3 copper pillars U4, M3 copper pillars U5, M3 copper pillars U6, and M3 copper pillars U7 are used to fix the plate. The voltage conversion module is connected to the IoT function module through the XH2.54-5V voltage output interface U8, XH2.54-12V voltage output interface U9, and XH2.54-5V voltage output interface U10.

[0027] like Figure 5As shown, in the IoT functional module, the input voltage of each channel is obtained from the voltage conversion module through the XH2.54 voltage input interface U17, XH2.54 voltage input interface U18, and XH2.54 voltage input interface U19. The output voltage of the front-stage LDO structure is connected to the ASM1117 conversion chip U16 through the XH2.54 voltage input interface U19 to realize 3.3V voltage output, which powers the ESP32 embedded core U1 device. Filter capacitors C1, C2, C3, and C4 are used to absorb noise voltage. XH2.54 voltage input interface U19 is directly connected to DHT11 temperature and humidity sensor U6, DHT11 temperature and humidity sensor U7, and ACS712 Hall current sensor U8, ACS712 Hall current sensor U9, ACS712 Hall current sensor U10, and ACS712 Hall current sensor U11 to realize the power supply of sensor equipment. Filter capacitors C5, C6, C7 and C8 are connected to ACS712 Hall current sensor U8, ACS712 Hall current sensor U9, ACS712 Hall current sensor U10 and ACS712 Hall current sensor U11 to form LC filter circuits to reduce noise interference on sensor devices. Buttons SW1, SW2, SW3 and XH2.54-OLED display control signal output interface U5 are used to implement onboard human-computer interaction functions. In general, users can use buttons SW1 and SW2 to send "output channel control" and "output channel status overview" function requests to ESP32 embedded core U1. ESP32 embedded core U1 will send control signals to XH2.54 voltage output interface U2 and XH2.54 control signal output interface U3 to change channel status, and send display signals to XH2.54-OLED display control signal output interface U5 to update display information. If the user uses the button SW3, the "output channel emergency shutdown" function is triggered, and the "output channel emergency shutdown" command is sent to the ESP32 embedded core U1, and the XH2.54 voltage output interface U2 and the XH2.54 control signal output interface U3 achieve low-level output. M3 copper pillars U12, M3 copper pillars U13, M3 copper pillars U14, and M3 copper pillars U15 are used to fix the plate.

[0028] In the description of the embodiments of the present utility model, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top", "bottom", "inside", "outside", "inner side", "outer side" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. Among them, "inside" refers to an internal or enclosed area or space. "Periphery" refers to the area surrounding a specific component or a specific area.

[0029] In the description of the embodiments of the present utility model, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0030] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "assemble" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the description of the embodiments of the present invention, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0032] In the description of the embodiments of the present utility model, it should be understood that "-" and "~" represent the range between two values, and the range includes the endpoints. For example: "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0033] In the description of the embodiments of the present utility model, the term "and / or" herein is only a kind of association relationship of describing the associated objects, indicating that there may be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An IoT voltage conversion circuit for PD protocol power supply, characterized in that: include: Voltage deception module, voltage conversion module and Internet of Things functional module; the voltage deception module is connected to the voltage conversion module, and the voltage conversion module is connected to the Internet of Things functional module; the voltage deception module includes a USB-TypeC interface U2, a deception chip U1 and a voltage output interface CN1; the USB-TypeC interface U2 is connected to a power source and a deception chip U1; the voltage output interface CN1 connects the deception chip U1 and the voltage conversion module.

2. The IoT voltage conversion circuit for PD protocol power supply according to claim 1, characterized in that: The voltage deception module also includes a CC1 channel pull-up resistor R1, a CC2 channel pull-up resistor R2, a working mode configuration resistor R3, a working mode configuration resistor R4, a voltage deception filter capacitor C1, a voltage deception filter capacitor C2 and a PMOS switch tube Q1; the deception chip U1 is connected to the working mode configuration resistor R3 and the working mode configuration resistor R4, and the working mode configuration resistor R3 is connected to the working mode configuration resistor R4; the deception chip U1 is respectively connected to the CC1 channel pull-up resistor R1 and the CC2 channel pull-up resistor R2; the USB-TypeC interface U2 is respectively connected to the CC1 channel pull-up resistor R1 and the CC2 channel pull-up resistor R2; the PMOS switch tube Q1 is connected to the deception chip U1; the voltage deception filter capacitor C1 is connected to the deception chip U1 and the PMOS switch tube Q1; the voltage deception filter capacitor C2 is connected to the deception chip U2 and the PMOS switch tube Q1.

3. The IoT voltage conversion circuit for PD protocol power supply according to claim 1, characterized in that: The voltage conversion module includes a 5V-LDO conversion structure, a 5V-DC-DC conversion structure, a 12V-DC-DC conversion structure, a capacitive feedback structure, a resistor feedback structure, a fuse F1 and a voltage input interface U11; the voltage input interface U11 is connected to the voltage deception module and the fuse F1; the fuse F1 is connected to the 5V-LDO conversion structure, the 5V-DC-DC conversion structure and the 12V-DC-DC conversion structure, the capacitive feedback structure is connected to the 5V-DC-DC conversion structure, and the resistor feedback structure is connected to the 12V-DC-DC conversion structure.

4. The IoT voltage conversion circuit for PD protocol power supply according to claim 3, characterized in that: The 5V-LDO conversion structure includes an LDO type conversion chip U3, a filter capacitor C13, a filter capacitor C14, a filter capacitor C15, a filter capacitor C16 and a voltage output interface U8 connected in sequence; the 5V-DC-DC conversion structure includes a filter capacitor C1, a filter capacitor C2, a filter capacitor C3, a DC-DC conversion chip U2, a current limiting resistor R5, a storage capacitor C9, a conversion inductor L1, a filter capacitor C6, a filter capacitor C7, a filter capacitor C8 and a voltage output interface U10 connected in sequence; the 12 The V-DC-DC conversion structure includes a DC-DC conversion chip U1, a current limiting resistor R6, a decoupling capacitor C11, an energy storage capacitor C10, a conversion inductor L2, a filter capacitor C18, a filter capacitor C17 and a voltage output interface U9. The DC-DC conversion chip U1 is respectively connected to the current limiting resistor R6, the decoupling capacitor C11, the energy storage capacitor C10, the conversion inductor L2, and the filter capacitor C18. The energy storage capacitor C10 is connected to the conversion inductor L2, and the filter capacitor C17 is connected to the filter capacitor C18 and the voltage output interface U9.

5. The IoT voltage conversion circuit for PD protocol power supply according to claim 3, characterized in that: The capacitive feedback structure includes a voltage-dividing sampling resistor R3, a voltage-dividing sampling resistor R4 and an energy storage capacitor C5, the voltage-dividing sampling resistor R3 and the voltage-dividing sampling resistor R4 are connected in series, and the voltage-dividing sampling resistor R3 and the energy storage capacitor C5 are connected in parallel; the resistance feedback structure includes a connected voltage-dividing sampling resistor R7 and a voltage-dividing sampling resistor R8.

6. The IoT voltage conversion circuit for PD protocol power supply according to claim 1, characterized in that: The Internet of Things functional module includes an embedded core U1 and a voltage output interface U2, an embedded core control signal output interface U3, an embedded core control signal output interface U4, a display screen control signal output interface U5, a sensor device, a conversion chip U16, a voltage input interface U17, a voltage input interface U18, a voltage input interface U19, a key switch SW1, a key switch SW2 and a key switch SW3 connected thereto; the voltage input interface U17 is connected to the voltage output interface U10 of the voltage conversion module; the voltage input interface U18 is connected to the voltage output interface U9 of the voltage conversion module; the voltage input interface U19 is connected to the voltage output interface U8 of the voltage conversion module; the voltage input interface U19 is connected to the conversion chip U16; the voltage input interface U19 is connected to the sensor device to power the sensor device.

7. The IoT voltage conversion circuit for PD protocol power supply according to claim 6, characterized in that: The sensor device includes a temperature and humidity sensor and a Hall current sensor.

8. The IoT voltage conversion circuit for PD protocol power supply according to claim 1, characterized in that: The voltage deception module, voltage conversion module and Internet of Things function module are provided with 4 copper pillars.

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