A multi-port charging control circuit, charging chip and power supply equipment

Abstract

The present application provides a multi-port charging control circuit, including a charging control circuit and multiple charging paths. When there are at least two conductive charging paths, the charging control circuit detects the output current of each conductive charging path, and disconnects the target charging path when the state of the target charging load connected to the target charging path meets the preset conditions; and when there is only one conductive charging path, the output voltage is adjusted to the target charging voltage requested by the charging load connected to the conductive charging path. The preset conditions include that the target charging load is unplugged, or the target charging load is not unplugged but the output current of the target charging path remains below the preset current threshold for a duration exceeding the preset time threshold. The solution of the present application is conducive to effectively monitoring the plug-in and unplugging status and the fully charged status of the charging loads of each charging path, and can dynamically and flexibly adjust the output voltage.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and in particular to a multi-port charging control circuit, a charging chip, and a power supply device having the multi-port charging control circuit or the charging chip. Background Art

[0002] In recent years, with the development of fast charging technology, various fast charging technologies have been used more and more widely, and there are more and more fast charging power supply devices such as fast charging adapters, fast charging car chargers, and fast charging mobile power supplies. In addition, with the widespread use of electronic products, users' demand for charging multiple devices at the same time has gradually increased, and multi-port fast charging technology has gradually occupied the mainstream of charging applications. However, since the output power of fast charging is relatively large, if multiple output interfaces output fast charging current at the same time, the total output power is too large, which will not only increase the design cost, but also increase the design difficulty.

[0003] In order to control costs, some existing power supply devices usually use a single power converter and only support fast charging output when only one output interface is connected to a charging load; when more than one output interface is connected to a charging load, the fast charging output is turned off, and when it is restored to only one output interface connected to a charging load, the fast charging output is restored. However, under this fast charging output mode, if some charging loads are fully charged but still connected to the output interface, even if only one charging load is not fully charged, the power supply device cannot output the fast charging voltage to the charging load that is not fully charged, resulting in a longer charging time for the charging load, affecting the user experience.

[0004] In order to shorten the charging time of the charging load, some existing power supply devices also determine whether the charging load is fully charged by monitoring whether the output current of the output interface is lower than a preset threshold, and actively shut down the corresponding charging output when the charging load is fully charged. In this way, when there is only one charging load that is not fully charged, the power supply device can actively output a fast charging voltage to the charging load that is not fully charged, thereby shortening the charging time of the charging load. However, during the charging process, the electronic device may have a high temperature due to certain special usage conditions. For the sake of safe charging, some electronic devices with a self-protection system will actively suspend charging when it is not fully charged, and continue charging after it returns to normal temperature. If the above-mentioned method of detecting the output current of the output interface is used to determine whether the electronic device is fully charged, a misjudgment may occur when the electronic device suspends charging, and the corresponding charging output may be shut down in advance, causing the electronic device to stop charging before it is fully charged, thereby affecting the user experience. Summary of the invention

[0005] The present application provides a multi-port charging control circuit and method, a charging chip and a power supply device, which can accurately and effectively detect the state of the charging load, and dynamically and flexibly control the on and off state of the charging path according to the detection results, so as to optimize the charging efficiency and improve the user experience.

[0006] The first aspect of the present application provides a multi-port charging control circuit, which includes multiple interface modules, a voltage conversion module, and a charging control module. Each of the interface modules is used to connect to a charging load. The voltage conversion module is electrically connected to the multiple interface modules to form multiple charging paths. The charging control module is electrically connected to the multiple charging paths and the voltage conversion module, respectively. The charging control module is used to detect the output current of each charging path in the on state when at least two charging paths are in the on state. The charging control module is also used to determine whether the output current of each charging path in the on state meets a first preset condition, wherein the first preset condition is that the output current of the charging path is lower than a preset current threshold. The charging control module is also used to set the one or more charging paths that meet the first preset condition as the target charging path when it is determined that the output current of one or more charging paths in the on state meets the first preset condition, and determine whether the state of the target charging load connected to the target charging path meets the second preset condition, wherein the second preset condition includes that the target charging load is unplugged, or the target charging load is not unplugged but the output current of the target charging path remains below the preset current threshold for a duration exceeding the first preset time threshold. The charging control module is also used to disconnect the target charging path when it is determined that the state of the target charging load meets the second preset condition.

[0007] A second aspect of the present application provides a charging chip, which includes the multi-port charging control circuit described in the first aspect.

[0008] The third aspect of the present application provides a fast charging power supply device, which includes a power input interface, multiple USB interfaces, and the multi-port charging control circuit described in the first aspect or the charging chip described in the second aspect. The power input interface is used to receive the input voltage provided by an external power supply. The multiple USB interfaces are used to be electrically connected to multiple charging loads one by one. The multi-port charging control circuit or the charging chip is electrically connected between the power input interface and the multiple USB interfaces, and is used to receive the input voltage and provide charging voltage for the multiple charging loads. Among them, the input end of the voltage conversion module of the multi-port charging control circuit or the charging chip is electrically connected to the power input interface, and the multiple interface modules of the multi-port charging control circuit or the charging chip are electrically connected to the multiple USB interfaces one by one.

[0009] The fourth aspect of the present application provides a multi-port charging control method, which is applied to the multi-port charging control circuit described in the first aspect or the charging chip described in the second aspect. The multi-port charging control method includes: when at least two charging paths are in a conducting state, detecting the output current of each charging path in a conducting state; judging whether the output current of each charging path in a conducting state meets a first preset condition, wherein the first preset condition is that the output current of the charging path is lower than a preset current threshold; when it is determined that the output current of one or more charging paths in a conducting state meets the first preset condition, setting the one or more charging paths that meet the first preset condition as a target charging path, and judging whether the state of the target charging load connected to the target charging path meets a second preset condition, wherein the second preset condition includes that the target charging load is unplugged, or the target charging load is not unplugged but the output current of the target charging path remains lower than the preset current threshold for a duration exceeding a first preset time threshold; and when it is determined that the state of the target charging load meets the second preset condition, disconnecting the target charging path.

[0010] When the multi-port charging control circuit of this embodiment detects that the output current of the target charging path is lower than the preset current threshold, the multi-port charging control circuit continues to detect whether the target charging load is unplugged. This can effectively avoid the situation where the target charging load is suspended for its own reasons and is misjudged as being unplugged, so that the target charging load can resume charging after suspending charging for a period of time, thereby improving the user's charging experience.

[0011] In addition, the multi-port charging control circuit of this embodiment can automatically disconnect the target charging path when the output current of the target charging path remains below the preset current threshold for a period of time exceeding a first preset time threshold, so that when only one charging load is not fully charged, the charging load that is not fully charged can be charged using the fast charging mode to increase the charging speed of the charging load that is not fully charged and improve the user's charging experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1A schematic diagram of the functional modules of a multi-port charging control circuit provided in an embodiment of the present application.

[0014] Figure 2 for Figure 1 Schematic diagram of the functional modules of the detection module shown.

[0015] Figure 3 for Figure 2 A circuit structure schematic diagram of the plug-in detection submodule is shown.

[0016] Figure 4 A schematic diagram of the functional modules of a charging chip provided in an embodiment of the present application.

[0017] Figure 5 A schematic diagram of the functional modules of a power supply device provided in an embodiment of the present application.

[0018] Figure 6 A flowchart of a multi-port charging control method provided in an embodiment of the present application.

[0019] Figure 7 A flowchart of a method for detecting the state of a charging load provided in an embodiment of the present application.

[0020] Main component symbols

[0021] Multi-port charging control circuit 100, 41, 52

[0022] Voltage conversion module 11

[0023] Charging path 12

[0024] Interface module 121

[0025] Switch module 122

[0026] Charging control module 13

[0027] Detection module 14

[0028] Plug and unplug detection submodule 141

[0029] Fast charging protocol detection submodule 142

[0030] Current detection submodule 143

[0031] Charging load 200

[0032] Charging chip 400

[0033] Power supply equipment 500

[0034] Power input interface 51

[0035] USB interface 53

[0036] Switching tubes Q1, Q2

[0037] Resistor R1

[0038] Comparator C1

[0039] Steps 601-610, 701-714

[0040] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. The drawings are only used for exemplary illustrations and represent only schematic diagrams, which cannot be understood as limitations on the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by those skilled in the art. The terms used in this application in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0043] Figure 1 This is a functional module diagram of a multi-port charging control circuit provided in an embodiment of the present application. Figure 1 As shown, the multi-port charging control circuit 100 includes a voltage conversion module 11, multiple interface modules 121, and a charging control module 13. Among them, each of the interface modules 121 is used to access the charging load 200. The interface module 121 can use an interface of the type Type-A or TYPE-C, for example. It can be understood that the multiple interface modules 121 can be set to the same type of interface or different types of interfaces. Figure 1 The multiple charging loads 200 shown in the figure correspond to different electronic devices, and the types of the electronic devices can be the same or different. For example, the electronic devices can be mobile phones, tablet computers, etc. Figure 1 In the figure, the multiple interface modules 121 are labeled with the same element symbols, and the multiple charging loads 200 are also labeled with the same element symbols.

[0044] The voltage conversion module 11 is used to receive an input voltage provided by an external power source (not shown), and convert the input voltage into a suitable output voltage for output. For example, the input voltage provided by the external power source may be 220V AC mains electricity, and accordingly, the voltage conversion module 11 may be used to convert the AC input voltage provided by the external power source into a DC output voltage.

[0045] The output end of the voltage conversion module 11 is electrically connected to the multiple interface modules 121 respectively to form multiple charging paths 12. The multiple charging paths 12 are used to output charging voltages to multiple connected charging loads 200 through corresponding interface modules 121. For the convenience of description, the embodiment of the present application mainly takes two charging paths 12 as an example to introduce the structure of the multi-port charging control circuit 100 of the present application in detail.

[0046] In this embodiment, the charging control module 13 is electrically connected to the plurality of charging paths 12, and the charging control module 13 is used to control the on / off states of the plurality of charging paths 12. Figure 1 As shown, the multi-port charging control circuit 100 also includes a plurality of switch modules 122, and the plurality of switch modules 122 correspond to the plurality of charging paths 12 one by one, and each switch module 122 is arranged on the corresponding charging path 12. That is, the plurality of switch modules 122 are electrically connected one by one between the voltage conversion module 11 and the plurality of interface modules 121. Each switch module 122 is used to control the on-off state of the corresponding charging path 12. Among them, the switch module 122 can adopt an electronic switch device such as a MOS tube, a triode, a relay, etc., and the type of the switch module 122 is not limited in this embodiment.

[0047] The charging control module 13 is electrically connected to the multiple switch modules 122, and the charging control module 13 controls the on / off states of the multiple charging paths 12 by controlling the on / off states of the multiple switch modules 122. In this embodiment, when the charging load 200 is not connected to the interface module 121, the switch module 122 is in an off state.

[0048] In this embodiment, the charging control module 13 is also used to detect the electrical parameters of each charging path 12 and the state of the charging load 200 connected to each interface module 121. Figure 1 As shown, the multi-port charging control circuit 100 further includes a plurality of detection modules 14, and the plurality of detection modules 14 correspond one-to-one to the plurality of interface modules 121 and the plurality of charging paths 12. The charging control module 13 is used to detect the electrical parameters of the plurality of charging paths 12 and the states of the charging loads 200 corresponding to the plurality of interface modules 121 through the plurality of detection modules 14.

[0049] In this embodiment, if Figure 2 As shown, each of the detection modules 14 includes a plug-in detection submodule 141, a fast charge protocol detection submodule 142, and a current detection submodule 143. The plug-in detection submodule 141 is electrically connected to the corresponding interface module 121, and the plug-in detection submodule 141 is used to detect the plug-in status of the charging load 200 corresponding to the corresponding interface module 121, and feed back the detection result to the charging control module 13.

[0050] Combine the following Figure 3 The circuit structure and working principle of the plug-in detection submodule 141 are briefly introduced. Figure 3 FIG. 1 is a schematic diagram of a circuit structure of the plug-in detection submodule 141. It is understandable that the structure of the plug-in detection submodule 141 is not limited to Figure 3 The structure shown.

[0051] like Figure 3 As shown, the plug-in detection submodule 141 includes a comparator C1, a resistor R1, and switch tubes Q1 and Q2. The positive input terminal + of the comparator C1 is electrically connected to the DP pin or DM pin of the corresponding interface module ( Figure 3 Taking the DP pin as an example), the positive input terminal + of the comparator C1 is also electrically connected to the output terminal of a voltage source (not shown) through the resistor R1 and the switch tubes Q1 and Q2 to receive an input voltage of 2.7V. The negative input terminal - of the comparator C1 is electrically connected to the output terminal of a reference voltage generating circuit (not shown) to receive a reference voltage of 2V. The on and off states of the switch tubes Q1 and Q2 can be controlled by a control signal det_en applied to the control terminals of the switch tubes Q1 and Q2. Among them, the control signal det_en can be generated by the charging control module 13, for example.

[0052] When no charging load is inserted into the interface module, the DP pin or DM pin is suspended, and its voltage is pulled up to 2.7V through the resistor R1. At this time, the positive input terminal + of the comparator C1 receives a voltage of 2.7V, which is higher than the reference voltage of 2V received by the negative input terminal -. According to the working principle of the comparator, the comparator C1 outputs a high-level signal "1". That is, when the charging load is not inserted into the interface module, the detection signal det_flag output by the comparator C1 is a high-level signal "1".

[0053] When a charging load (not shown) is inserted into the interface module, the impedance to ground of the charging load (not shown) and the resistor R1 form a voltage divider circuit. According to the voltage divider principle, the voltage of the DP pin or DM pin is pulled down to below 2V by the impedance to ground of the charging load. At this time, the positive input terminal of the comparator C1 receives a voltage lower than 2V, and the comparator C1 outputs a low-level signal "0". That is, when a charging load is inserted into the interface module, the detection signal det_flag output by the comparator C1 is a low-level signal "0".

[0054] In this way, the charging control module 13 can detect the plug-in status of the charging load corresponding to the corresponding interface module 121 through the detection signal det_flag fed back by the plug-in detection submodule 141 .

[0055] It can be understood that when the plug-in detection submodule 141 detects that a charging load 200 is inserted into the corresponding interface module 121 and feeds back the detection signal det_flag to the charging control module 13, the charging control module 13 can turn on the corresponding charging path 12 according to the detection signal det_flag fed back by the plug-in detection submodule 141, so as to output a charging voltage to the connected charging load 200.

[0056] The fast charge protocol detection submodule 142 is electrically connected to the corresponding interface module 121, and is used to detect the fast charge protocol signal of the charging load connected to the corresponding interface module 121, and feed back the detection result to the charging control module 13. It can be understood that for different types of interface modules, the circuit structure of the fast charge protocol detection submodule 142 can also be changed accordingly.

[0057] Among them, when the fast charging protocol detection submodule 142 detects a fast charging protocol signal, the charging control module 13 can determine that the corresponding charging load 200 supports the fast charging protocol, and can identify the fast charging voltage required or requested by the corresponding charging load 200 according to the fast charging protocol signal fed back by the fast charging protocol detection submodule 142. On the contrary, when the fast charging protocol detection submodule 142 does not detect a fast charging protocol signal, the charging control module 13 can determine that the corresponding charging load 200 does not support the fast charging protocol, and can determine that the corresponding charging load 200 requests a normal charging voltage.

[0058] The current detection submodule 143 is electrically connected to the corresponding charging path 12, and is used to detect the output current of the corresponding charging path 12, and feed back the detection result to the charging control module 13. In this way, after the charging path 12 is turned on, the charging control module 13 can detect the output current of the charging path 12 in the turned-on state in real time or at a preset frequency through the corresponding current detection submodule 143.

[0059] When in use, the charging control module 13 is used to detect in real time or at a preset frequency whether a charging load is connected to the interface module 121 corresponding to the charging path 12 in the disconnected state, and when a charging load is detected to be connected to the charging path 12 in the disconnected state, the charging path in the disconnected state and connected to the charging load is turned on. In this embodiment, as described above, the charging control module 13 can detect whether a charging load is connected to the interface module 121 corresponding to the charging path 12 in the disconnected state through the plug-in detection submodule 141 corresponding to the charging path 12 in the disconnected state.

[0060] In this embodiment, the charging control module 13 is further used to monitor the number of charging paths 12 in a conducting state in real time or at a preset frequency during use.

[0061] like Figure 1 As shown, the charging control module 13 is also electrically connected to the voltage conversion module 11, and the charging control module 13 is also used to control the voltage conversion module 11 to output a preset common charging voltage when at least two charging paths 12 are in a conducting state. The common charging voltage can be set to 5V.

[0062] Since the fast charging output power is relatively large, for multi-port fast charging power supply equipment, if multiple output interfaces simultaneously output fast charging current, the total output power is too large, which will not only increase the design cost, but also increase the design difficulty. The multi-port charging control circuit 100 of this embodiment outputs a preset normal charging voltage to charge each connected charging load when at least two of the charging paths 12 are in a conducting state, thereby effectively avoiding the problem of excessive total output power caused by multiple interface modules 121 outputting fast charging current at the same time through a simple circuit structure, and does not increase the design and manufacturing costs.

[0063] Furthermore, the charging control module 13 is also used to detect the output current of each charging path 12 in the conductive state in real time or at a preset frequency when at least two charging paths 12 are in the conductive state. In this embodiment, as described above, the charging control module 13 can detect the output current of the conductive charging path 12 through the current detection submodule 143.

[0064] Furthermore, the charging control module 13 is also used to determine whether the output current of each of the charging paths 12 in the on state meets a first preset condition. The first preset condition is that the output current of the charging path changes from being higher than a preset current threshold to being lower than the preset current threshold. The preset current threshold can be set to 10mA or 100mA, for example. In this embodiment, the specific value of the preset current threshold is not limited.

[0065] The charging control module 13 is also used to set the one or more charging paths 12 that meet the first preset condition as target charging paths when it is determined that the output current of one or more charging paths 12 in the on state meets the first preset condition, and to determine whether the state of the target charging load connected to the target charging path meets the second preset condition, and to disconnect the target charging path when it is determined that the state of the target charging load meets the second preset condition.

[0066] In this embodiment, the second preset condition may include that the target charging load is unplugged. In this embodiment, as described above, the charging control module 13 may detect whether the charging load connected to the charging path 12 in the conductive state is unplugged or removed through the plug-in detection submodule 141 corresponding to the charging path 12 in the conductive state.

[0067] It can be understood that the multi-port charging control circuit 100 of this embodiment disconnects the target charging path when it detects that the target charging load is unplugged, so that when there is only one conductive charging circuit left, the charging load connected to the conductive charging path can be charged using the fast charging mode to speed up the charging speed of the charging load.

[0068] In this embodiment, the second preset condition may also include that the target charging load is not unplugged but the output current of the target charging path remains below the preset current threshold for a duration exceeding a first preset time threshold t1. The first preset time threshold may be set to 10 minutes, 20 minutes, or 30 minutes, for example. In this embodiment, the specific value of the first preset time threshold is not limited.

[0069] It is understandable that the multi-port charging control circuit 100 may further include a timer module (not shown), which is used to record the duration. It is understandable that the timer module may also be set in the charging control module 13, and the setting of the timer module is not limited in the embodiment of the present application.

[0070] Since some electronic devices may have a high temperature during the charging process due to certain special usage conditions, for example, the electronic device is charged in a place with a high ambient temperature, or the user uses the electronic device to charge while playing games, when the electronic device detects that its temperature is too high, for the sake of safe charging, these electronic devices may actively suspend charging when they are not fully charged, and continue charging after they return to normal temperature. If the output current of the charging path is used to determine whether the electronic device is fully charged, it is likely that a misjudgment will occur when the electronic device suspends charging, and the corresponding charging path will be disconnected in advance, causing the electronic device to stop charging before it is fully charged, thereby affecting the user experience.

[0071] When the multi-port charging control circuit 100 of this embodiment detects that the output current of the target charging path is lower than the preset current threshold, it continues to detect whether the target charging load is unplugged, which can effectively avoid the situation where the target charging load is suspended for its own reasons and is misjudged as being unplugged, so that the target charging load can resume charging after suspending charging for a period of time, thereby improving the user's charging experience.

[0072] In addition, if the output current of the target charging path remains below the preset current threshold for a duration exceeding a first preset time threshold, it indicates that the target charging load may have been fully charged. If the target charging path continues to be in the on state for a long time, even if only one charging load is not fully charged, the charging load that is not fully charged still cannot be charged using the fast charging mode.

[0073] By adopting the multi-port charging control circuit 100 of the present embodiment, the target charging path can be automatically disconnected when the output current of the target charging path remains below the preset current threshold for a period exceeding a first preset time threshold. Therefore, when only one charging load is not fully charged, the charging load that is not fully charged can be charged using the fast charging mode, thereby increasing the charging speed of the charging load that is not fully charged and improving the user's charging experience.

[0074] In summary, the multi-port charging control circuit 100 provided in this embodiment can accurately and effectively detect the plug-in status and full-charge status of the charging load corresponding to each charging path, and can dynamically and flexibly adjust the output voltage of the voltage conversion module according to the detection results, thereby optimizing the charging efficiency and improving the user's charging experience.

[0075] In another embodiment, the first preset condition may be set as the output current of the target charging path changes from being higher than a preset current threshold to being lower than the preset current threshold, and the output current of the target charging path remains lower than the preset current threshold for a duration exceeding a second preset time threshold t0. In this way, for short-term abnormal charging conditions, such as a situation where a user touches the target charging load and affects the circuit connection, frequent triggering of the detection of the full charge state and the unplugged state of the target charging load can be avoided, and the target charging path can also be avoided from being disconnected prematurely.

[0076] The second preset time threshold t0 is smaller than the first preset time threshold t1. The second preset time threshold t0 can be set to 8 seconds, 16 seconds, 32 seconds, etc., and the specific value of the second preset time threshold is not limited in this embodiment.

[0077] The following is a detailed description of the operation of the charging control module 13 in determining whether the state of the target charging load connected to the target charging path satisfies the second preset condition.

[0078] In this embodiment, the charging control module 13 first determines whether the target charging load is in a fast charging request state. It is understandable that the charging control module 13 can detect the fast charging protocol signal of the target charging load through the fast charging protocol detection submodule 142 corresponding to the target charging path to determine whether the target charging load is in a fast charging request state. Among them, if the fast charging protocol signal of the target charging load is detected, it can be determined that the target charging load is in a fast charging request state; conversely, if the fast charging protocol signal of the target charging load is not detected, it can be determined that the target charging load is not in a fast charging request state.

[0079] In the present embodiment, when the target charging load is in the fast charging request state, the charging control module 13 can determine that the target charging load has not been unplugged. It can be understood that the target charging load is in the fast charging request state, which means that the target charging load has not been unplugged or removed, and the target charging load may be fully charged, or charging may be suspended due to an abnormal situation. It should be noted that in the present embodiment, since at least two of the charging paths are in the on state, the voltage conversion module 11 outputs a normal charging voltage, and therefore, all connected charging loads are charged with a normal charging voltage. In this way, the target charging load being in the fast charging request state only means that the target charging load supports fast charging or has a demand for fast charging, but the target charging load is not necessarily in the fast charging mode, and the target charging load may also be in the normal charging mode, that is, the non-fast charging mode.

[0080] Further, when the target charging load is not in the fast charging request state, the charging control module 13 continues to detect whether the target charging load has been unplugged.

[0081] It is understandable that the charging load may or may not support fast charging. For a charging load that does not support fast charging, the fact that the target charging load is not in a fast charging request state does not mean that the target charging load is unplugged. Therefore, further plug-in detection is required to accurately determine whether the target charging load has actually been unplugged.

[0082] As described above, the charging control module 13 can detect whether the target charging load is unplugged or removed through the plug-in detection submodule 141 corresponding to the target charging path 12 .

[0083] Please also see Figure 3 When the charging load is just inserted into the interface module, since the corresponding charging path has not yet output the fast charging voltage to the charging load, the voltage of the DP pin or DM pin of the corresponding interface module will be lower than 2V, and the comparator C1 will output a low level signal "0". Therefore, the insertion of the charging load can be accurately detected by the plug-in detection submodule 141.

[0084] During the charging process, if there is only one charging load left and the charging load is in fast charging mode, even if the charging load is fully charged or charging is suspended, the voltage of the DP pin or DM pin of the corresponding interface module may be higher than 2V, so the comparator C1 may output a high level signal "1". At this time, the charging control module 13 cannot accurately determine whether the charging load is unplugged only through the detection signal det_flag fed back by the plug-in detection submodule 141, and may misjudge that the charging load is unplugged.

[0085] Before performing plug-in and unplug detection on the target load, the multi-port charging control circuit 100 of this embodiment first detects the fast charging protocol signal of the target load to determine whether the target charging load is in a fast charging request state, which can exclude the situation where the charging load is in a fast charging mode of full charging or charging pause but is mistakenly judged to be unplugged, thereby achieving effective and accurate detection of the plug-in and unplugging status of the charging load, avoiding false detection of whether the charging load is unplugged, and further avoiding premature disconnection of the target charging path due to false judgment.

[0086] Further, when it is determined that the target charging load is not unplugged, the charging control module 13 continues to determine whether the duration for which the output current of the target charging path remains below the preset current threshold exceeds the first preset time threshold.

[0087] It is understandable that by judging whether the duration exceeds the first preset time threshold, it is possible to effectively avoid the situation where the target charging path is disconnected in advance due to the suspension of charging of the target charging load, and it is also possible to avoid the target charging path being in the on state for a long time when the target charging load is fully charged. In this way, after the charging load is suspended for a period of time, the charging load that is not fully charged can resume charging.

[0088] Further, when the duration exceeds the first preset time threshold, or when it is determined that the target charging load has been unplugged, the charging control module 13 determines that the state of the target charging load satisfies the second preset condition, and disconnects the target charging path to stop the voltage output to the target charging path.

[0089] In this way, when the state of the charging load connected to one or more of the conductive charging paths meets the second preset condition, the charging control module 13 can automatically disconnect one or more of the conductive charging paths, so that the remaining conductive charging paths have the opportunity to obtain fast charging voltage to shorten the charging time.

[0090] It can be understood that in this embodiment, only when the target charging load has not been unplugged is it necessary to wait for the first preset time threshold before disconnecting the target charging path, and when it is determined that the target charging load has been unplugged, the target charging path can be disconnected immediately without waiting for the first preset time threshold.

[0091] In this embodiment, the charging control module 13 is also used to obtain the target charging voltage requested by the charging load connected to the charging path in the on state when only one charging path is in the on state, and control the voltage conversion module 11 to adjust the output voltage to the target charging voltage, so that the charging load connected to the charging path in the on state can be charged at the target charging voltage.

[0092] Among them, the charging control module 13 can detect the fast charging protocol signal of the charging load connected to the charging path in the on state through the corresponding fast charging protocol detection submodule 142, and determine the corresponding target charging voltage according to the fast charging protocol signal.

[0093] It is understandable that when only one of the charging paths is in the on state, the charging load connected to the on-state charging path may not necessarily request a fast charging voltage. If the charging load requests a normal charging voltage, it means that the charging load does not support the fast charging protocol, and the voltage conversion module 11 can continue to output a normal charging voltage to charge the corresponding charging load. If the charging load requests a fast charging voltage, it means that the charging load supports the fast charging protocol, and the charging control module 13 can control the voltage conversion module 11 to output a corresponding fast charging voltage to charge the corresponding charging load, thereby shortening the charging time of the corresponding charging load.

[0094] It can be understood that when only one of the charging paths is in the on state and the voltage conversion module 11 outputs a fast charging voltage, if a charging load is connected to other charging paths, the charging control module 13 can control the voltage conversion module 11 to adjust the output voltage to the normal charging voltage.

[0095] To summarize, the multi-port charging control circuit 100 provided in this embodiment can automatically and flexibly adjust the output voltage by detecting the state of the connected charging load, thereby suspending the fast charging function when at least two charging paths 12 are in the on state, so as to effectively avoid the problem of excessive total output power caused by multiple interface modules outputting fast charging current at the same time; the fast charging function is restored when only one charging path 12 is in the on state, so as to speed up the charging speed of the charging load in the most efficient charging method, thereby optimizing the charging efficiency, and also better taking into account the user experience.

[0096] Furthermore, the multi-port charging control circuit 100 provided in this embodiment can effectively identify and distinguish between the two states of the charging load being fully charged and being unplugged / removed for the charging path with a charging current less than the preset current threshold, and adopt different disconnection strategies for the corresponding charging path for the two different states of being fully charged and being unplugged / removed, thereby improving the user's charging experience.

[0097] In this embodiment, different disconnection strategies refer to taking different time to maintain the conduction state of the corresponding target charging path according to the different states of the target charging load. For example, when the target charging load has been removed, the corresponding target charging path can be disconnected after a few seconds, more than ten seconds, or tens of seconds, thereby reducing the waiting time for other charging loads to charge using the fast charging mode; when the target charging load is still on the corresponding interface module, the corresponding target charging path can be disconnected after a few minutes, more than ten minutes, or tens of minutes, thereby effectively avoiding the false detection of whether the charging load has been unplugged.

[0098] Furthermore, the multi-port charging control circuit 100 provided in this embodiment can not only quickly identify whether the charging load has been removed for the charging path whose charging current is less than the preset current threshold, but also quickly disconnect the corresponding charging channel when the charging load is actually removed, and continue to charge the charging load for a period of time when the charging load is not removed. This method of extending the charging time is particularly effective for detection schemes with low current detection accuracy, because if the detection accuracy is not high, it is necessary to set the preset current threshold to a larger value, such as 100mA. At this time, the charging load is in a state of being almost fully charged, but it may not be fully charged yet. By extending the charging time, the charging load can be truly fully charged. As for the situation in which the charging load temporarily stops charging due to factors such as abnormal temperature as mentioned above, extending the charging time can enable the charging load to resume charging within this time.

[0099] The present application also provides a charging chip. Figure 4 As shown, the charging chip 400 includes a multi-port charging control circuit 41. The multi-port charging control circuit 41 may correspond to Figure 1 For the multi-port charging control circuit 100 shown in FIG. 1 , please refer to the previous description of the multi-port charging control circuit 41 for specific technical details. Figure 1 The detailed description of the multi-port charging control circuit 100 is not repeated here for the sake of saving space and avoiding repetition. It can be understood that the multiple interface modules of the multi-port charging control circuit 41 can correspond to the I / O interfaces on the charging chip.

[0100] This application also provides a fast charging power supply device. Figure 5 As shown, the power supply device 500 includes a power input interface 51, a multi-port charging control circuit 52, and multiple USB interfaces 53. The power input interface 51 is electrically connected to the multi-port charging control circuit 52, and the power input interface 51 is used to receive an external power source, such as an input voltage provided by a 220V AC mains, to provide an input voltage to the multi-port charging control circuit 52.

[0101] The multiple USB interfaces 53 are used to electrically connect to multiple charging loads, such as mobile phones, tablet computers, etc. In this embodiment, the USB interfaces 53 include USB TYPE-A interfaces and USB TYPE-C interfaces. The USB interfaces 53 are used to electrically connect to charging loads via USB charging cables.

[0102] The multi-port charging control circuit 52 is used to charge the connected charging load. In this embodiment, the multi-port charging control circuit 52 may correspond to Figure 1For the specific technical details of the multi-port charging control circuit 52, please refer to the previous Figure 1 The detailed description of the multi-port charging control circuit 100 is not repeated here for the sake of saving space and avoiding repetition. It is understandable that the multi-port charging control circuit 52 can be set in a charging chip.

[0103] The multi-port charging control circuit 52 is electrically connected between the power input interface 51 and the multiple USB interfaces 53, and is used to receive the input voltage and provide charging voltage for the multiple charging loads. Specifically, the input end of the voltage conversion module of the multi-port charging control circuit 52 is electrically connected to the power input interface 51, and the multiple interface modules of the multi-port charging control circuit 52 are electrically connected to the multiple USB interfaces 53 one by one.

[0104] The power supply device 500 may be a fast-charging mobile power supply, a fast-charging adapter, or other device.

[0105] Figure 6 A flowchart of a multi-port charging control method provided in an embodiment of the present application. The multi-port charging control method can be applied to Figure 1 The multi-port charging control circuit 100 or Figure 4 It should be noted that the multi-port charging control method of this embodiment is not limited to Figure 6 The steps and order in the flowchart shown. According to different requirements, the steps in the flowchart shown can be added, removed, or the order can be changed.

[0106] In this embodiment, if Figure 6 As shown, the multi-port charging control method includes the following steps.

[0107] Step 601, detect whether a charging load is connected to the interface module corresponding to the charging path in the disconnected state. When it is detected that a charging load is connected to the charging path in the disconnected state, step 603 is executed; when it is not detected that a charging load is connected to the charging path in the disconnected state, step 602 is executed.

[0108] Step 602, determine whether there is a charging path in the on state. If there is a charging path in the on state, execute step 604; if there is no charging path in the on state, return to step 601 and continue to detect whether the interface module corresponding to the charging path in the off state has a charging load connected.

[0109] Step 603, turning on the charging path that is in an off state and has a charging load connected.

[0110] Step 604, monitor the number of charging paths in the on state and determine whether only one charging path is in the on state. When at least two charging paths are in the on state, execute step 605; when only one charging path is in the on state, execute step 610.

[0111] Step 605: Control the voltage conversion module to output a preset normal charging voltage.

[0112] Step 606, detecting the output current of each charging path in the on state.

[0113] Step 607, determining whether the output current of each charging path in the on state meets a first preset condition, wherein the first preset condition is that the output current of the charging path is lower than a preset current threshold.

[0114] Optionally, in another embodiment, the first preset condition may be set as that the output current of the charging path is lower than a preset current threshold, and the duration for which the output current of the charging path remains lower than the preset current threshold exceeds a second preset time threshold.

[0115] If the output current of one or more charging paths in the on state meets the first preset condition, the one or more charging paths meeting the first preset condition are set as target charging paths, and step 608 is executed; if the output current of each charging path in the on state does not meet the first preset condition, return to step 606 and continue to detect the output current of each charging path in the on state.

[0116] Step 608 , determining whether the state of the target charging load connected to the target charging path satisfies a second preset condition.

[0117] The second preset condition includes that the target charging load is unplugged, or the target charging load is not unplugged but the output current of the target charging path remains below the preset current threshold for a duration exceeding a first preset time threshold. The first preset time threshold is greater than the first preset time threshold.

[0118] If the state of the target charging load satisfies the second preset condition, step 609 is executed; if the state of the target charging load does not satisfy the second preset condition, the process returns to step 606 to continue detecting the output current of each charging path in the on state.

[0119] Step 610, obtaining a target charging voltage requested by a charging load connected to a charging path in an on state, and controlling a voltage conversion module to adjust an output voltage to the target charging voltage.

[0120] The specific technical details of steps 601-610 of this embodiment can be referred to in Figure 1 The description of the relevant technical details of the illustrated embodiment will not be repeated here.

[0121] The multi-port charging control method of this embodiment continues to detect whether the target charging load is unplugged when it detects that the output current of the target charging path is lower than the preset current threshold. This can effectively avoid the situation where the target charging load is suspended for its own reasons and is misjudged as being unplugged, so that the target charging load can resume charging after suspending charging for a period of time, thereby improving the user's charging experience.

[0122] In addition, the multi-port charging control method of this embodiment can automatically disconnect the target charging path when the output current of the target charging path remains below the preset current threshold for a period of time exceeding a first preset time threshold, so that when only one charging load is not fully charged, the charging load that is not fully charged can be charged using the fast charging mode to increase the charging speed of the charging load that is not fully charged and improve the user's charging experience.

[0123] In addition, the multi-port charging control method provided in this embodiment can automatically and flexibly adjust the output voltage by detecting the state of the connected charging load, thereby suspending the fast charging function when at least two charging paths are in the on state, so as to effectively avoid the problem of excessive total output power caused by multiple interface modules outputting fast charging current at the same time; the fast charging function is restored when only one charging path is in the on state, so that the charging speed of the charging load can be accelerated in the most efficient charging method, thereby achieving the effect of optimizing the charging efficiency, and at the same time, it can also better take into account the user experience.

[0124] Figure 7 A flow chart of a method for detecting the state of a charging load provided in an embodiment of the present application. The method for detecting the state of a charging load can be applied to Figure 1 The multi-port charging control circuit 100 or Figure 4 In the charging chip shown.

[0125] In this embodiment, if Figure 7 As shown, the charging load state detection method includes the following steps.

[0126] Step 701, detecting the output current of each charging path in the on state.

[0127] Step 702, determine whether the output current of each charging path in the on state is lower than the preset current threshold. If the output current of one or more charging paths in the on state is lower than the preset current threshold, set the one or more charging paths with output current lower than the preset current threshold as the target charging path, and execute step 703; if the output current of each charging path in the on state is not lower than the preset current threshold, return to step 701 and continue to detect the output current of each charging path in the on state.

[0128] Step 703 , starting a timer to start timing, that is, timing the duration t during which the output current of the target charging path remains below the preset current threshold.

[0129] Step 704, determine whether the duration t exceeds a second preset time threshold t0. If the duration t exceeds the second preset time threshold t0, execute step 708; if the duration t does not exceed the second preset time threshold t0, execute step 705.

[0130] Step 705 , continue to detect the output current of the target charging path.

[0131] Step 706, determine whether the output current of the target charging path is lower than the preset current threshold. If the output current of the target charging path is lower than the preset current threshold, return to step 704 to continue to determine whether the duration t exceeds the second preset time threshold t0; if the output current of the target charging path is not lower than the preset current threshold, it means that the target charging load resumes charging, and at this time, execute step 707.

[0132] Step 707, the timer is reset, and the process returns to step 701 to continue detecting the output current of each charging path in the on state.

[0133] Step 708, determine whether the target charging load is in a fast charge request state. If the target charging load is in a fast charge request state, determine that the target charging load is still in a connected state and has not been unplugged. At this time, execute step 712; if the target charging load is not in a fast charge request state, execute step 709.

[0134] Step 709: Perform plug-in and unplug detection on the target charging load.

[0135] Step 710, determining whether the target charging load has been unplugged. If the target charging load has not been unplugged, executing step 712; if the target charging load has been unplugged, executing step 711.

[0136] Step 711, disconnecting the target charging path.

[0137] Step 712, determine whether the duration t exceeds the first preset time threshold t1. If the duration t exceeds the first preset time threshold t1, the process jumps to the step 711; if the duration t does not exceed the first preset time threshold t1, execute step 713.

[0138] Step 713, continue to detect the output current of the target charging path.

[0139] Step 714, determine whether the output current of the target charging path is lower than the preset current threshold. If the output current of the target charging path is lower than the preset current threshold, return to step 708 to continue to determine whether the target charging load is in a fast charging request state; if the output current of the target charging path is not lower than the preset current threshold, it means that the target charging load has resumed charging, and at this time, the process jumps to step 707.

[0140] Among them, steps 701-714 of this embodiment are Figure 6 For specific steps of steps 606-609 of the embodiment shown in the figure, the specific technical details can be referred to in Figure 1 The description of the relevant technical details of the illustrated embodiment will not be repeated here.

[0141] It should be noted that the state detection method of the charging load in this embodiment is not limited to Figure 7 Steps and order in the flowchart shown. According to different requirements, the steps in the flowchart shown can be added, removed, or changed in order. For example, according to different requirements, steps 704-706 can be removed.

[0142] The charging load status detection method of the present embodiment first detects the fast charging protocol signal of the target load before performing plug-in detection on the target load to determine whether the target charging load is in a fast charging request state, which can exclude the situation where the charging load is in a fast charging mode of full charging or charging pause but is mistakenly judged to be unplugged, thereby achieving effective and accurate detection of the plug-in status of the charging load, avoiding false detection of whether the charging load is unplugged, and further avoiding premature disconnection of the target charging path due to false judgment.

[0143] Furthermore, the charging load status detection method provided in this embodiment can effectively identify and distinguish between the two states of the charging load being fully charged and being unplugged / removed for the charging path with a charging current less than the preset current threshold, and adopt different disconnection strategies for the corresponding charging path for the two different states of being fully charged and being unplugged / removed, thereby improving the user's charging experience.

[0144] Furthermore, the charging load status detection method provided in this embodiment is for a charging path with a charging current less than the preset current threshold, which can not only quickly identify whether the charging load has been removed, but also quickly disconnect the corresponding charging channel when the charging load is actually removed, and continue to charge the charging load for a period of time when the charging load is not removed. This method of extending the charging time is particularly effective for detection schemes with low current detection accuracy, because if the detection accuracy is not high, it is necessary to set the preset current threshold to a larger value, such as 100mA. At this time, the charging load is in a state of being almost fully charged, but it may not be fully charged yet. By extending the charging time, the charging load can be truly fully charged. As for the situation in which the charging load temporarily stops charging due to factors such as abnormal temperature as mentioned above, extending the charging time can enable the charging load to resume charging within this time.

[0145] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the above preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A multi-port charging control circuit, characterized in that: include: Multiple interface circuits, multiple detection circuits, voltage conversion circuits and charging control circuits; wherein each of the interface circuits is used to connect to a charging load; wherein the voltage conversion circuit is electrically connected to the plurality of interface circuits to form a plurality of charging paths; wherein the plurality of detection circuits correspond to the plurality of interface circuits and the plurality of charging paths one by one; Wherein, the detection circuit is used to detect the electrical parameters of the multiple charging paths and the states of the charging loads corresponding to the multiple interface circuits; The charging control circuit is electrically connected to the multiple charging paths and the voltage conversion circuit respectively, and the charging control circuit is used for: When at least two charging paths are in an on state, the detection circuit is used to detect the output current of each charging path in an on state; whether the output current of one or more charging paths in an on state satisfies a first preset condition, wherein the first preset condition is that the output current of the charging path is lower than a preset current threshold; when it is determined that the output current of one or more charging paths in an on state satisfies the first preset condition, the one or more charging paths that satisfy the first preset condition are set as target charging paths, and whether the state of the target charging load connected to the target charging path satisfies a second preset condition; and When it is determined that the state of the target charging load satisfies the second preset condition, disconnecting the target charging path; in, The second preset condition includes that the target charging load is unplugged, or the target charging load is not unplugged but the output current of the target charging path remains below the preset current threshold for a duration exceeding a first preset time threshold; Wherein, when determining whether the state of the target charging load connected to the target charging path satisfies the second preset condition, the charging control circuit is used to: determine whether the target charging load is in a fast charging request state; When the target charging load is in a fast charging request state, determine that the target charging load has not been unplugged; when the target charging load is not in a fast charging request state, detect whether the target charging load has been unplugged; when it is determined that the target charging load has not been unplugged, judge whether the duration for which the output current of the target charging path remains below the preset current threshold exceeds the first preset time threshold; when the duration exceeds the first preset time threshold, or when it is determined that the target charging load has been unplugged, determine that the state of the target charging load satisfies the second preset condition.

2. The multi-port charging control circuit according to claim 1, characterized in that: When determining whether the target charging load is in a fast charging request state, the charging control circuit is used to: Detecting a fast charging protocol signal of the target charging load; When a fast charging protocol signal of the target charging load is detected, determining that the target charging load is in a fast charging request state; as well as When the fast charging protocol signal of the target charging load is not detected, it is determined that the target charging load is not in a fast charging request state.

3. The multi-port charging control circuit according to any one of claims 1 to 2, characterized in that: The first preset condition is that the output current of the charging path is lower than the preset current threshold, and the output current of the charging path remains lower than the preset current threshold for a duration exceeding a second preset time threshold; wherein the second preset time threshold is less than the first preset time threshold.

4. The multi-port charging control circuit according to any one of claims 1 to 2, characterized in that: The charging control circuit is also used to detect whether a charging load is connected to the interface circuit corresponding to the charging path in the disconnected state, and when it is detected that a charging load is connected to the charging path in the disconnected state, the charging path in the disconnected state and connected to the charging load is turned on.

5. The multi-port charging control circuit as claimed in claim 4, characterized in that: The charging control circuit is also used for: monitoring the number of charging paths in a conducting state; When it is monitored that at least two charging paths are in a conducting state, controlling the voltage conversion circuit to output a preset common charging voltage; as well as When it is monitored that only one charging path is in the on state, the target charging voltage requested by the charging load connected to the on-state charging path is obtained, and the voltage conversion circuit is controlled to adjust the output voltage to the target charging voltage.

6. The multi-port charging control circuit according to claim 4, characterized in that: The multi-port charging control circuit also includes multiple switch circuits, which correspond one-to-one to the multiple charging paths. Each switch circuit is arranged on a corresponding charging path. The charging control circuit is also electrically connected to the multiple switch circuits respectively. The charging control circuit controls the on-off state of the multiple charging paths by controlling the on-off state of the multiple switch circuits.

7. A charging chip, characterized in that: It comprises a multi-port charging control circuit as described in any one of claims 1-6.

8. A power supply device, comprising: A power input interface, used to receive an input voltage provided by an external power source; Multiple USB interfaces, used for electrically connecting to multiple charging loads one by one; as well as The multi-port charging control circuit according to any one of claims 1 to 6 or the charging chip according to claim 7, wherein the multi-port charging control circuit or the charging chip is electrically connected between the power input interface and the multiple USB interfaces, and is used to receive the input voltage and provide a charging voltage for the multiple charging loads; Among them, the input end of the multi-port charging control circuit or the voltage conversion circuit of the charging chip is electrically connected to the power input interface, and the multiple interface circuits of the multi-port charging control circuit or the charging chip are electrically connected one by one to the multiple USB interfaces.

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