PD fast-filling digital display data line

Abstract

The utility model provides a data line, belongs to the technical field of PD fast charging equipment, and particularly relates to a PD fast charging digital display data line, which comprises a Hall effect current sensor, the Hall effect current sensor is connected in series with a TYPE-C interface through an IP + end and an IP-end, the TYPE-C interface is provided with a VBUS connected with the Hall effect current sensor, and the VBUS is connected with the Hall effect current sensor. One side of the Hall effect current sensor and one side of the VBUS are electrically connected with an MCU, one side of the MCU is provided with a self-driven LED display screen, and one side of the Hall effect current sensor, one side of the VBUS and one side of the MCU are electrically connected with a low dropout regulator LDO. And when the charging current is large, the temperature of the circuit board is too high, and the use is inconvenient.

Description

Technical Field

[0001] The utility model provides a data cable, belonging to the technical field of PD fast charging equipment, and particularly relates to a PD fast charging digital display data cable. Background Art

[0002] The charging detection of the controller of the PD fast charging digital display data cable on the market currently adopts dual-resistance detection technology, which can display the current charging power and charging direction under the premise of bidirectional charging. Most structures are bidirectional current acquisition circuits, control units and display modules. The bidirectional current acquisition circuit includes a first resistor and a second resistor connected in series on the charging circuit. The grounding point of the charging circuit is connected between the first resistor and the second resistor. The first resistor outputs a forward sampling current at one end away from the second resistor, and the second resistor outputs a reverse sampling current at one end away from the first resistor. The control unit is respectively connected to the forward sampling current and the reverse sampling current. When the forward sampling current is a positive voltage, the display module is controlled to display a forward charging indication. When the reverse sampling current is a positive voltage, the display module is controlled to display a reverse charging indication.

[0003] In the above structure, the accuracy of detecting the charging current is not enough and the displayed current is inaccurate. Different devices have different accuracy of displayed power due to different resistance errors. Moreover, it can only be used for low-voltage and low-current charging lines. When the charging current is large, the temperature of the circuit board will be high, which is inconvenient to use. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, the embodiments of the present application provide a PD fast charging digital display data cable, which solves the problem that different devices in the prior art have different display accuracy of power due to different resistance errors, and can only be used for low-voltage and low-current charging cables. When the charging current is large, the circuit board temperature will be high, making it inconvenient to use.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a PD fast charging digital display data cable, including a Hall effect current sensor, wherein the Hall effect current sensor is connected in series with a TYPE-C interface through an IP+ terminal and an IP- terminal, and the TYPE-C interface is provided with a VBUS connected to the Hall effect current sensor, and one side of the Hall effect current sensor and VBUS is electrically connected to an MCU, one side of the MCU is provided with an LED display driven by itself, and one side of the Hall effect current sensor, VBUS and the MCU is electrically connected to a low voltage difference linear regulator LDO.

[0006] Preferably: an E-Marker chip is provided inside the TYPE-C interface.

[0007] Preferably: the output reference voltage of the Hall effect current sensor is used as a system calibration reference voltage for detecting current, and the Hall effect current sensor is internally provided with a high-sensitivity Hall sensor component, a Hall signal pre-amplifier, a common-mode magnetic field suppression circuit, a temperature compensation unit, an oscillator, a dynamic offset elimination circuit and an amplifier output module.

[0008] Preferably, the display content on the LED display screen is generated by the MCU according to the current conditions of the voltage and current on the current VBUS.

[0009] Preferably: the E-Marker chip is used to read the characteristics of the data line, including power transmission capability, data transmission speed, video transmission capability and cable ID information.

[0010] Preferably, the MCU is connected to the output voltage signal of the Hall effect current sensor and the voltage signal on VBUS via a built-in analog-to-digital converter ADC, and converts these signals into digital signals for processing.

[0011] Preferably: the LED display screen can be replaced with an OLED display screen.

[0012] Preferably, the other ends of the LED display screen and the MCU are both GND.

[0013] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0014] The utility model detects the current passing through the PD fast charging line through a Hall effect current sensor and generates a corresponding voltage signal; uses an MCU to receive and convert the above voltage signal into current data, and collects voltage data to determine the charging status; displays the current current, voltage, power and other related charging information through an LED display screen, which can effectively display the current size, power, and current direction on the PD fast charging digital display data line controller; uses an E-Marker chip to read and process the identity information of the data line to adapt to the optimal charging efficiency between different devices and determine the current charging capacity and whether it complies with the PD protocol.

[0015] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a flow chart of a PD fast charging digital display data cable of the utility model.

[0017] As shown in the figure:

[0018] 1. Hall effect current sensor;

[0019] 11. IP+ terminal; 12. IP- terminal; 13. TYPE-C interface; 14. VBUS; 15. E-Marker chip;

[0020] 2. MCU;

[0021] 21. LED display; 22. ADC; 23. OLED display; 24. GND;

[0022] 3. LDO. 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] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention are only for the purpose of describing specific implementation methods and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0026] Prerequisites required:

[0027] MCU: Microcontroller or microcontroller

[0028] PD fast charging: PD fast charging is a fast charging standard launched by the USB standardization organization. Its full name is USB Power Delivery Specification. It uses bidirectional high-voltage charging technology, which can greatly improve charging efficiency and can reach up to 240 watts.

[0029] Type-C: Type-C is a USB interface standard. Its biggest feature is that it can be inserted on either side, which is convenient and fast. The size of the Type-C interface is about 8.3mm×2.5mm, which is smaller than the traditional USB interface and suitable for thin and light electronic devices. The Type-C interface supports USB standard charging, data transmission, display output and other functions, and the bandwidth and speed have been significantly improved.

[0030] E-Marker: The full name of E-Marker is "Electronically Marked Cable". We can understand it as the electronic identity tag of the USB Type-C cable. Through this chip, various properties of the cable can be read, including power transmission capacity, data transmission capacity, video transmission capacity and ID information. Based on this, the output end (such as a charging head, a notebook) can adjust the matching voltage / current or audio and video signal according to the device connected to the output end (such as a mobile phone or a monitor).

[0031] VBUS: The VBUS pin is used in the Type-C interface and is a power supply pin. It can provide 5V, 9V, 15V, 20V, 28V, 36V or 48V voltage to the outside, and can provide a maximum power of 240W. This pin needs to be connected to the GND pin to work properly. When data communication or charging is in progress, these two pins need to be connected at the same time.

[0032] IP+: positive terminal of sampling current

[0033] IP-: negative terminal of sampling current

[0034] VOUT: output voltage

[0035] VREF: Output reference voltage terminal

[0036] VCC: power supply voltage 5V or 3V

[0037] GND: It is the abbreviation of the ground terminal of the wire. It represents the ground wire or zero wire. This ground is not the real ground, but a ground assumed for application. For the power supply, it is the negative pole of the power supply.

[0038] BiCMOS: BiCMOS means a logic circuit that combines the advantages of both BJT and MOS tubes.

[0039] LDO: Low Dropout Linear Regulator

[0040] ADC: Analog-to-Digital Converter is the abbreviation of analog-to-digital converter, which can convert continuously changing analog signals into discrete digital signals for further processing by microprocessors.

[0041] like Figure 1 As shown, the utility model provides a PD fast charging digital display data cable, including a Hall effect current sensor 1, characterized in that: the Hall effect current sensor 1 is connected in series with a TYPE-C interface 13 with an E-Marker 15 chip inside through an IP+ terminal 11 and an IP- terminal 12, and a VBUS 14 connected to the Hall effect current sensor 1 is provided on the TYPE-C interface 13, and a MCU2 is electrically connected to one side of the Hall effect current sensor 1 and VBUS 14, and a LED display 21 driven by itself is provided on one side of the MCU2, and a low voltage difference linear regulator LDO3 is electrically connected to one side of the Hall effect current sensor 1, VBUS 14 and MCU2, and the output reference voltage of the Hall effect current sensor 1 is used as a system calibration reference voltage for detecting current, and a high-sensitivity Hall sensor component, a Hall signal pre-amplifier, a common-mode magnetic field suppression circuit, a temperature compensation unit, an oscillator, a dynamic offset elimination circuit and an amplifier output module are provided inside the Hall effect current sensor 1.

[0042] In this embodiment, the Hall effect current sensor 1 uses a high-precision Hall effect current detection sensor to achieve accurate detection of the large current conducted by the data line. It generates a magnetic field through the current flowing through an internal wire, and induces corresponding electrical signals on the Hall circuit. These signals are converted into voltage signals for output after the processing circuit. The key to this component is that it can provide high-precision current detection, and its advantages include high linearity, high temperature stability, and a wide measurement range; MCU (microcontroller) 2 is the core processing unit of the PD fast charging digital display data line controller, which is responsible for receiving the output signal of the Hall effect sensor 1 and converting these voltage signals into current values. At the same time, the MCU also collects the voltage value on VBUS to calculate the current charging parameters, such as current, voltage, power, etc., and controls the display to display this information. The MCU implements key tasks such as signal sampling, calculation and display control; the display (LED or OLED screen) displays the current charging information according to the data generated by the MCU processing, including various parameters such as current, voltage, power, and PD protocol. This component provides users with a friendly interface, intuitively displays complex electrical parameters, and allows users to easily understand the charging status; LDO (low voltage difference linear regulator) 3 provides a stable operating voltage VCC for the controller. It is connected to VBUS and reduces the VBUS voltage to the voltage level required for the MCU and display. The role of LDO is to ensure that the entire controller system can operate at a safe and stable voltage to prevent damage that may be caused by voltage fluctuations; the E-Marker chip 15 is located at a specific interface of the data line and can read information such as the power transmission capacity, data transmission speed, video transmission capacity and ID of the data line. The chip allows the output end to adjust the matching voltage / current or audio and video signal according to the specific needs of the connected device, ensuring the optimal charging and data transmission efficiency between the connected devices.

[0043] like Figure 1 As shown, the LED display screen 21 is driven by MCU2 using a specific time-sharing multiplexing scanning drive algorithm software. The display content on the LED display screen 21 is generated by MCU2 according to the current status of the voltage and current on VBUS14. The E-Marker chip 15 is used to read the characteristics of the data line, including power transmission capability, data transmission speed, video transmission capability and cable ID information. MCU2 is connected to the output voltage signal of the Hall effect current sensor 1 and the voltage signal on VBUS14 through the built-in analog-to-digital converter ADC22, and converts these signals into digital signals for processing. The LED display screen 21 can be replaced with an OLED display screen 23, and the other ends of the LED display screen 21 and MCU2 are both GND24.

[0044] In this embodiment, the purpose of the present invention is to provide a PD fast charging digital display data cable, so that the PD fast charging digital display data cable data truly has the advantages of conducting large current, high precision current and voltage detection, high linearity and temperature stability, and wide measurement range. And then provide users with a digital display data cable with high-speed and large current visual performance that fully complies with the PD3.0 and PD3.1 protocol standards. At the same time, it is also compatible with QC and AFC full-protocol charging detection indications. The highly sensitive Hall effect current detection sensor technology is used to achieve accurate detection of large currents conducted by the data line; the reference voltage source of the Hall effect current detection sensor is used as the reference voltage for system voltage calibration; when a dedicated LED display screen 21 is used as the display screen of the PD fast charging digital display data cable, it is used to indicate the charging current, power, PD protocol and other parameters of the data line; when a dedicated OLED display screen 23 is used as the display screen of the PD fast charging digital display data cable, it is used to indicate the charging current, power, PD protocol and other parameters of the data line.

[0045] When in use, current detection and signal conversion: When the data line is connected to the device for charging, the Hall effect current sensor 1 senses the current flowing through the TYPE-C interface 13 through its IP+ terminal 11 and IP- terminal 12. This TYPE-C interface with an E-Marker15 chip inside helps to transmit current. The high-sensitivity sensor component inside the Hall effect current sensor 1 detects the magnetic field generated by the current passing through the wire and converts it into an electrical signal. These signals are processed by pre-amplification, common-mode magnetic field suppression, temperature compensation, oscillation, dynamic offset elimination and amplification, and finally output as a reference voltage signal;

[0046] Signal processing and display calculation: MCU2 receives the output voltage signal of the Hall effect current sensor 1 and the voltage signal on VBUS14 collected by the built-in ADC22. MCU calculates the current charging parameters such as current, voltage, power, etc. based on these signals, and drives the LED display 21 or OLED display 23 through a dedicated time-division multiplexing scanning drive algorithm software to display these charging parameters;

[0047] Voltage stabilization and data characteristic reading: LDO3 obtains voltage from VBUS14 and reduces it to a voltage level suitable for the MCU and display to ensure stable operation of the system. At the same time, the E-Marker chip 15 reads the power transmission capacity, data transmission speed, video transmission capacity and cable ID information of the data line to adjust the output to meet the device requirements.

[0048] Through the above steps, the PD fast charging digital display data cable controller can achieve accurate current and voltage detection, efficient data processing and display, stable power supply, and intelligent device identification, providing users with high-precision and high-efficiency charging experience while maintaining compatibility with protocol standards such as PD3.0 and PD3.1.

[0049] Although the present invention has been disclosed as above in terms of preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the technology may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A PD fast charging digital display data cable, comprising a Hall effect current sensor (1), characterized in that: The Hall effect current sensor (1) is connected in series with a TYPE-C interface (13) via an IP+ terminal (11) and an IP- terminal (12); a VBUS (14) connected to the Hall effect current sensor (1) is provided on the TYPE-C interface (13); one side of the Hall effect current sensor (1) and the VBUS (14) is electrically connected to an MCU (2); one side of the MCU (2) is provided with an LED display screen (21) driven by the MCU; and one side of the Hall effect current sensor (1), the VBUS (14) and the MCU (2) is electrically connected to a low voltage difference linear regulator LDO (3).

2. A PD fast charging digital display data cable according to claim 1, characterized in that: An E-Marker chip (15) is provided inside the TYPE-C interface (13).

3. A PD fast charging digital display data cable according to claim 1, characterized in that: The output reference voltage of the Hall effect current sensor (1) is used as a system calibration reference voltage for detecting current. The Hall effect current sensor (1) is internally provided with a high-sensitivity Hall sensor component, a Hall signal pre-amplifier, a common-mode magnetic field suppression circuit, a temperature compensation unit, an oscillator, a dynamic offset elimination circuit and an amplifier output module.

4. A PD fast charging digital display data cable according to claim 1, characterized in that: The display content on the LED display screen (21) is generated by the MCU (2) according to the current conditions of the voltage and current on the VBUS (14).

5. A PD fast charging digital display data cable according to claim 2, characterized in that: The E-Marker chip (15) is used to read the characteristics of the data line, including power transmission capability, data transmission speed, video transmission capability and cable ID information.

6. A PD fast charging digital display data cable according to claim 1, characterized in that: The MCU (2) is connected to the output voltage signal of the Hall effect current sensor (1) and the voltage signal on VBUS (14) via a built-in analog-to-digital converter ADC (22), and converts these signals into digital signals for processing.

7. A PD fast charging digital display data cable according to claim 1, characterized in that: The LED display screen (21) can be replaced with an OLED display screen (23).

8. A PD fast charging digital display data cable according to claim 1, characterized in that: The other ends of the LED display screen (21) and the MCU (2) are both GND (24).

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