Charging end, electronic equipment, charging system and charging power compensation method

Abstract

The invention discloses a charging end, electronic equipment, a charging system and a charging power compensation method. The charging end comprises a switch, a voltage detection circuit, a controller and a power management chip, the voltage detection circuit is connected with a configuration channel of the Type-C interface of the charging end; a voltage pin of the power management chip is connected with a first end of the switch, and a second end of the switch is connected with a power pin of the Type-C interface; the power supply pin charges the charged end; the voltage detection circuit detects the common-mode voltage of the configuration channel when the charging end charges the charged end; the controller obtains a voltage regulation signal according to the voltage reference value and the common-mode voltage, and sends the voltage regulation signal to the power management chip through the serial communication interface; the voltage reference value is a common-mode voltage of a configuration channel when charging is not carried out after the charging end and the charged end are connected; the power management chip adjusts the output voltage of the voltage pin according to the voltage adjusting signal, power loss in the charging process can be compensated, and the charging efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of device charging, and in particular to a charging terminal, an electronic device, a charging system and a charging power compensation method. Background Art

[0002] Many electronic devices' communication and charging interfaces use Type-C interfaces. The Type-C interface adopts a symmetrical upper and lower side design, and the socket is a flat rectangular shape.

[0003] With the application of Type-C interface, power delivery (PD) communication in fast charging technology is becoming more and more important. However, with the increase of charging power and charging current, the online loss of Type-c cable is getting bigger and bigger, and the loss of Type-c physical port at the charging end and the charged end cannot be ignored. As a result, when the charging end charges the charged end, the online power loss may be too serious, thus affecting the charging effect and charging stability. Summary of the invention

[0004] In view of this, the present application provides a charging terminal, an electronic device, a charging system and a charging power compensation method, which can compensate for the power loss during the charging process and improve the charging efficiency.

[0005] The present application provides a charging end, comprising: a switch, a voltage detection circuit, a controller and a power management chip; the voltage detection circuit is used to connect the configuration channel of the Type-C interface of the charging end; the voltage pin of the power management chip is connected to the first end of the switch, and the second end of the switch is connected to the power pin of the Type-C interface; the power pin is used to charge the charged end; the output pin of the controller is connected to the control end of the switch; the serial communication interface of the controller is connected to the serial communication interface of the power management chip; the voltage detection circuit is used to detect the common mode voltage of the configuration channel when the charging end charges the charged end; the controller is used to obtain a voltage adjustment signal according to a voltage reference value and the common mode voltage, and send the voltage adjustment signal to the power management chip through the serial communication interface; the voltage reference value is the common mode voltage of the configuration channel when the charging end is connected to the charged end but not charged; the power management chip is used to adjust the output voltage of the voltage pin according to the voltage adjustment signal.

[0006] In a possible implementation, the controller is used to control the charging end to supply power to the charged end after the voltage detection circuit detects the voltage reference value.

[0007] In a possible implementation, after controlling the charging end to supply power to the charged end, the controller is further used to send a charging list to the charged end through the configuration channel, wherein the charging list includes multiple charging parameter combinations of charging voltage and charging current, and receives a target charging parameter combination selected by the charged end, and sends the target charging parameter combination to the power management chip; the power management chip is used to control the output voltage and output current according to the target charging parameter combination.

[0008] In a possible implementation, the charging end also includes: a current detection circuit; the current detection circuit is connected to the ground pin of the Type-C interface, and is used to detect the current of the ground pin; the controller is also used to generate a control signal when the current drop amplitude of the ground pin exceeds the current threshold, and send the control signal to the power management chip through the serial communication interface; the power management chip is used to adjust the output voltage according to the control signal.

[0009] In a possible implementation, the voltage detection circuit is an analog-to-digital converter; the power management chip is also used to shield the voltage regulation signal sent by the controller when the output voltage reaches an upper limit value.

[0010] The present application also provides an electronic device, comprising the charging terminal described above.

[0011] In a possible implementation manner, the electronic device is a charger or a display.

[0012] The present application also provides a charging system, including the electronic device introduced above, and also including a charged end; the charging end is connected to the charged end through the Type-C interface; the charging end is used to charge the charged end through the Type-C interface.

[0013] In a possible implementation, the charged end is a notebook computer or a display.

[0014] The present application also provides a charging power compensation method, including: when the charging end charges the charged end, detecting the common-mode voltage of the configuration channel of the Type-C interface of the charging end; the charging end and the charged end are used to be connected through the Type-C interface; obtaining a voltage adjustment signal according to a voltage reference value and the common-mode voltage, the voltage reference value being the common-mode voltage of the configuration channel when the charging end is connected to the charged end but not charged; and adjusting the output voltage of the voltage pin according to the voltage adjustment signal.

[0015] It can be seen that this application has the following beneficial effects:

[0016] The charging terminal provided in the embodiment of the present application detects the common-mode voltage of the configuration channel during the charging process, compares the common-mode voltage with the voltage reference value to obtain a voltage adjustment signal, and adjusts the output voltage according to the voltage adjustment signal, thereby meeting the charging voltage and charging power requirements of the charged terminal. The charging terminal can dynamically adjust the output voltage according to the common-mode voltage detected in real time, thereby compensating for the reduction in charging power caused by power consumption loss. The charging terminal can ensure that the charging power provided to the charged terminal is the power actually required by the charged terminal, rather than the power after the loss is reduced, thereby ensuring the charging efficiency and quality of the charged terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a charging terminal provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of another charging terminal provided in an embodiment of the present application;

[0019] Figure 3 A schematic diagram of an electronic device provided in an embodiment of the present application;

[0020] Figure 4 A schematic diagram of a charging system provided in an embodiment of the present application;

[0021] Figure 5 A flowchart is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] See also Figure 1 , which is a schematic diagram of a charging terminal provided in an embodiment of the present application.

[0024] The charging terminal 100 provided in the embodiment of the present application includes: a switch Q, a voltage detection circuit 10 , a controller 30 and a power management chip 20 .

[0025] The voltage detection circuit 10 is used to connect to the configuration channel CC of the Type-C interface.

[0026] The voltage pin of the power management chip 20 is connected to the first end of the switch, and the second end of the switch is connected to the power pin VBUS of the Type-C interface; the power pin VBUS is used to charge the charged end. Figure 1 Only the CC, VBUS and ground GND pins of the Type-C interface are shown, and other pins may also be included but are not shown.

[0027] The output pin of the controller 30 is connected to the control end of the switch Q. For example, the output pin of the controller 30 is a general-purpose input output (GPIO) pin.

[0028] The serial communication interface of the controller 30 is connected to the serial communication interface of the power management chip 20. The embodiment of the present application does not specifically limit the specific type of the serial communication interface. For example, a possible implementation is an I2C serial communication interface, where SCL is a serial clock pin; SDA is a serial data pin; and INT is an interrupt pin.

[0029] The voltage detection circuit 10 is used to detect the common mode voltage of the configuration channel CC when the charging terminal 100 charges the charged terminal. That is, the charging terminal 100 provides a charging current to the charged terminal, and the charged terminal serves as a load of the charging terminal 100.

[0030] It should be understood that when the charging end charges the charged end, a large charging current will flow through the Type-C cable. Because the cable has internal resistance, and the internal resistance is related to the material and length of the Type-C cable, there is a difference in voltage between the charging end and the charged end, which in turn affects the difference in common-mode voltage between the charging end and the charged end. It should be understood that in addition to the power loss caused by the internal resistance of the cable, there is also the power loss of the Type-C physical interface and the loss on the printed circuit board PCB of the charged end, because the PCB routing, some protective devices in series, etc. have internal resistance, which will generate power loss. This application collectively refers to the above as power loss, and the following common-mode voltage difference can represent the power loss collectively referred to above.

[0031] The common mode voltage of the configuration channel CC can reflect the voltage loss on the charging path during the charging process. The current flows from the power management chip 20 to the charged end. Since power is equal to voltage multiplied by current, the common mode voltage can be used to characterize the power loss during the charging process.

[0032] The controller 30 is used to obtain a voltage regulation signal according to the voltage reference value and the common mode voltage, and send the voltage regulation signal to the power management chip through the serial communication interface, that is, to the power management chip 20 through SDA; the voltage reference value is the common mode voltage of the configuration channel CC when the charging terminal 100 is connected to the charged terminal but not charged. That is, the voltage reference value is the common mode voltage of the configuration channel CC detected by the voltage detection circuit 10 when there is no charging current between the charging terminal 100 and the charged terminal. That is, the voltage reference value is detected when the charging terminal 100 is unloaded and does not charge the charged terminal.

[0033] Specifically, the controller 30 can obtain a voltage adjustment signal according to the difference between the voltage reference value and the common mode voltage. For example, when the common mode voltage is greater than the reference voltage value, the output voltage is increased. The common mode voltage will not be less than the reference voltage. The specific adjustment ratio can be implemented in a variety of ways, which are not specifically limited in the embodiments of the present application. For example, the output voltage can be adjusted according to a preset ratio according to the difference.

[0034] The power management chip 20 is used for adjusting the output voltage of the voltage pin VBUS according to the voltage regulation signal.

[0035] The embodiments of the present application do not specifically limit the manner in which the power management chip 20 adjusts the output voltage according to the voltage regulation signal. For example, in one possible implementation, the power management chip 20 may adjust the voltage bias according to the voltage regulation signal, thereby changing the output voltage.

[0036] The embodiment of the present application does not specifically limit the period of the voltage detection circuit detecting the common-mode voltage. It can detect in real time during the charging process, and then adjust the output voltage in real time to compensate for the lost power, so that the charging power provided by the charging end to the charged end is the charging power actually required. That is, the power compensation provided by the charging end to the charged end in the embodiment of the present application is dynamic real-time compensation, and the common-mode voltage detected each time will be compared with the voltage reference value, and the output voltage will be adjusted according to the voltage difference.

[0037] The charging terminal provided in the embodiment of the present application detects the common mode voltage of the configuration channel during the charging process, compares the common mode voltage with the voltage reference value to obtain a voltage adjustment signal, and adjusts the output voltage according to the voltage adjustment signal, thereby meeting the charging voltage and charging power requirements of the charged terminal. The charging terminal can dynamically adjust the output voltage according to the common mode voltage detected in real time, thereby compensating for the reduction in charging power caused by power loss.

[0038] See also Figure 2 , which is a schematic diagram of another charging terminal provided in an embodiment of the present application.

[0039] The charging terminal and controller provided in the embodiment of the present application are used to control the charging terminal 100 to supply power to the charged terminal after the voltage detection circuit 10 detects the voltage reference value. It should be understood that the charging terminal 100 provided in the embodiment of the present application, when the charging terminal 100 and the charged terminal are connected through the Type-C interface, the charging terminal 100 will not immediately supply power or charge the charged terminal, but the charging terminal 100 first detects the common mode voltage of the configuration channel CC as the voltage reference value. Since different charged terminals are connected to the charging terminal 100, the voltage reference values ​​may be different. Therefore, each time the charging terminal 100 is connected to the charged terminal, the voltage reference value can be detected once, and then power can be supplied, and then charging can be started after obtaining the charging voltage corresponding to the charged terminal.

[0040] The following describes the process by which the charging end obtains the charging voltage corresponding to the charged end.

[0041] The controller 30, after controlling the charging terminal 100 to supply power to the charged terminal, is also used to send a charging list to the charged terminal through the configuration channel CC, the charging list includes a plurality of charging parameter combinations of charging voltage and charging current, and receives the charging parameter combination selected by the charged terminal, and sends the charging parameter combination to the power management chip 20; the charging parameter combination includes the corresponding relationship between the charging voltage and the charging current, which can be in the form of a list, for example, the charging voltage is 5V, and the corresponding charging current is 3A. The charging voltage is 15V, and the charging current is 3A. The charging voltage is 20V, and the charging current is 5A.

[0042] The power management chip 20 is used to control the output voltage and output current according to the charging parameter combination.

[0043] For example, when the charging parameter combination fed back by the charging end is a charging voltage of 20V and a charging current of 5A, the output voltage of VBUS of the charging end is 20V.

[0044] The charging end provided in the embodiment of the present application also includes a transmitter TX and a receiver RX. It should be understood that the charging parameter combination introduced above is sent to the transmitter TX by the controller 30, and the transmitter TX is sent to the charged end through the configuration channel CC. The receiver RX receives the charging parameter combination selected by the charged end through the configuration channel CC and sends it to the controller 30.

[0045] In order to protect the safety of the charging terminal, the charging terminal provided in the embodiment of the present application further includes: a current detection circuit 40;

[0046] The input end of the current detection circuit 40 is connected to the ground GND pin of the Type-C interface for detecting the current of the ground GND pin. The current detection circuit 40 includes a detection resistor and a differential amplifier A. The differential amplifier has two input ends, namely, a positive input end Isen+ and a negative input end Isen-. The output of the differential amplifier A is an analog signal, which needs to be converted into a digital signal and sent to the controller 30.

[0047] The controller 30 is also used to generate a control signal when the current drop amplitude of the ground GND pin exceeds the current threshold, and send the control signal to the power management chip through the serial communication interface. In order to make the power management chip 20 respond in time, when the current drop amplitude exceeds the current threshold, the controller can send an interrupt signal to the interrupt pin INT of the power management chip 20, and send a control signal through the SDA pin at the same time or subsequently, so that the power management chip 20 responds to the control signal first. Under normal charging conditions, the current of the ground GND pin will change from small to large, but when it changes from large to small, and the change trend is large, it means that there is an abnormality. The embodiment of the present application does not specifically limit the current drop amplitude, and it can be set according to the actual scenario. For example, the current threshold can be set to 2A, and the charging current drops from 5A to 3A, or from 3A to 1A, etc.

[0048] The power management chip 20 is used to adjust the output voltage according to the control signal.

[0049] In the charging end provided in the embodiment of the present application, the voltage detection circuit 10 is an analog-to-digital converter ADC, and the ADC is used to convert the detected analog voltage into a digital voltage and then send it to the controller 30.

[0050] The charging terminal provided in the embodiment of the present application performs a charging voltage limiting protection in order to ensure the safety of charging. Specifically, the power management chip 20 is also used to shield the voltage adjustment signal sent by the controller when the output voltage reaches the upper limit value. The embodiment of the present application does not specifically limit the value of the upper limit value, for example, it can be set to 21V, and can be set according to the actual application scenario.

[0051] The charging terminal provided in the embodiment of the present application can not only compensate for power loss, but also protect both the charging current and the charging voltage. For example, it can implement limiting protection of the charging voltage and protection against a significant drop in the charging current.

[0052] The embodiment of the present application does not specifically limit the application scenario of the charging terminal, and the charging terminal can be placed as a circuit board in any required product.

[0053] Based on a charging terminal provided in the above embodiment, an embodiment of the present application further provides an electronic device, which is described in detail below in conjunction with the accompanying drawings.

[0054] See also Figure 3 , which is a schematic diagram of an electronic device provided in an embodiment of the present application.

[0055] The electronic device 1000 provided in the embodiment of the present application includes the charging terminal 100 introduced in the above embodiment.

[0056] The embodiments of the present application do not specifically limit the specific product form of the electronic device. For example, in one possible implementation, the electronic device is a charger or a display. For example, the electronic device can be a large-screen display used in a conference room, the charged end can be a laptop, the large-screen display can charge the laptop, and the interface is a Typc-C interface.

[0057] The electronic device provided in the embodiment of the present application can charge the charged end and dynamically adjust the output voltage during the charging process to compensate for power consumption loss, thereby ensuring that the charging power provided to the charged end is the power actually required by the charged end, rather than the power after the loss is reduced, thereby ensuring the charging efficiency and quality of the charged end.

[0058] Based on a charging terminal and an electronic device provided in the above embodiments, an embodiment of the present application further provides a charging system, which is described in detail below in conjunction with the accompanying drawings.

[0059] See also Figure 4 , which is a schematic diagram of a charging system provided in an embodiment of the present application.

[0060] The charging system 2000 provided in the embodiment of the present application includes the electronic device 1000 introduced in the above embodiment, and also includes a charged end 200 .

[0061] The charging terminal 100 is connected to the charged terminal 200 via a Type-C interface; the charging terminal 100 is used to charge the charged terminal 200 via the Type-C interface.

[0062] The embodiment of the present application does not specifically limit the type of the charged terminal, for example, the charged terminal is a laptop or a display. When the charging terminal is a charger or a large display, the charged terminal can be a small display or a laptop, etc.

[0063] Based on a charging terminal, an electronic device and a charging system provided in the above embodiments, the embodiments of the present application further provide a charging power compensation method, which is described in detail below in conjunction with the accompanying drawings.

[0064] See also Figure 5 , which is a flow chart of a charging power compensation method provided in an embodiment of the present application.

[0065] The charging power compensation method provided in the embodiment of the present application includes:

[0066] S501: When the charging end charges the charged end, detect the common mode voltage of the configuration channel of the Type-C interface of the charging end; the charging end and the charged end are used to be connected through the Type-C interface.

[0067] S502: Obtain a voltage adjustment signal according to a difference between a voltage reference value and a common mode voltage, wherein the voltage reference value is a common mode voltage of a configuration channel when the charging end is connected to the charged end but is not charged.

[0068] S503: Adjust the output voltage of the voltage pin according to the voltage adjustment signal.

[0069] The embodiment of the present application does not specifically limit the period of the voltage detection circuit detecting the common-mode voltage. It can detect in real time during the charging process, and then adjust the output voltage in real time to compensate for the lost power, so that the charging power provided by the charging end to the charged end is the charging power actually required. That is, the power compensation provided by the charging end to the charged end in the embodiment of the present application is dynamic real-time compensation, and the common-mode voltage detected each time will be compared with the voltage reference value, and the output voltage will be adjusted according to the voltage difference.

[0070] The charging power compensation method provided in the embodiment of the present application detects the common mode voltage of the configuration channel during the charging process, compares the common mode voltage with the voltage reference value to obtain a voltage adjustment signal, and adjusts the output voltage according to the voltage adjustment signal, thereby meeting the charging voltage and charging power requirements of the charged end. The charging end can dynamically adjust the output voltage according to the common mode voltage detected in real time, thereby compensating for the reduction in charging power caused by power loss.

[0071] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0072] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A charging terminal, characterized in that: include: Switches, voltage detection circuits, controllers, and power management chips; The voltage detection circuit is used to connect to the configuration channel of the Type-C interface of the charging end; The voltage pin of the power management chip is connected to the first end of the switch, and the second end of the switch is connected to the power pin of the Type-C interface; the power pin is used to charge the charged end; The output pin of the controller is connected to the control end of the switch; The serial communication interface of the controller is connected to the serial communication interface of the power management chip; The voltage detection circuit is used to detect the common mode voltage of the configuration channel when the charging end charges the charged end; The controller is used to obtain a voltage regulation signal according to the voltage reference value and the common mode voltage, and send the voltage regulation signal to the power management chip through the serial communication interface; The voltage reference value is the common mode voltage of the configuration channel when the charging end is connected to the charged end but not charged; The power management chip is used to adjust the output voltage of the voltage pin according to the voltage regulation signal.

2. The charging terminal according to claim 1, characterized in that: The controller is used to control the charging end to supply power to the charged end after the voltage detection circuit detects the voltage reference value.

3. The charging terminal according to claim 2, characterized in that: The controller, after controlling the charging end to supply power to the charged end, is further used to send a charging list to the charged end through the configuration channel, the charging list including a plurality of charging parameter combinations of charging voltage and charging current, and receive a target charging parameter combination selected by the charged end, and send the target charging parameter combination to the power management chip; The power management chip is used to control the output voltage and output current according to the target charging parameter combination.

4. The charging terminal according to any one of claims 1 to 3, characterized in that: The charging end also includes: a current detection circuit; The current detection circuit is connected to the ground pin of the Type-C interface and is used to detect the current of the ground pin; The controller is further configured to generate a control signal when the current drop amplitude of the ground pin exceeds a current threshold, and send the control signal to the power management chip through the serial communication interface; The power management chip is used to adjust the output voltage according to the control signal.

5. The charging terminal according to any one of claims 1 to 3, characterized in that: The voltage detection circuit is an analog-to-digital converter; The power management chip is also used to shield the voltage regulation signal sent by the controller when the output voltage reaches an upper limit value.

6. An electronic device, characterized in that: Comprising the charging terminal described in any one of claims 1-5.

7. The electronic device according to claim 6, characterized in that: The electronic device is a charger or a display.

8. A charging system, characterized in that: The electronic device according to claim 6 or 7, further comprising a charged terminal; The charging end is connected to the charged end via the Type-C interface; the charging end is used to charge the charged end via the Type-C interface.

9. The charging system according to claim 8, characterized in that: The charged end is a notebook computer or a display.

10. A charging power compensation method, characterized in that: include: When the charging end charges the charged end, detecting the common mode voltage of the configuration channel of the Type-C interface of the charging end; The charging end and the charged end are used to be connected via the Type-C interface; Obtaining a voltage regulation signal according to a voltage reference value and the common mode voltage, wherein the voltage reference value is the common mode voltage of the configuration channel when the charging end is connected to the charged end but is not charged; The output voltage of the voltage pin is adjusted according to the voltage adjustment signal.

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