Charging circuit, charging control method and charger

Abstract

The invention provides a charging circuit, a charging control method and a charger. The charging circuit comprises a main controller. The plurality of charging output ends are respectively connected with the main controller and are respectively connected with to-be-charged equipment; the AD conversion circuit comprises a first output branch circuit corresponding to the charging output end, and the first output branch circuit is provided with a switching circuit for controlling the corresponding first output branch circuit to be connected or disconnected; the plurality of DD conversion circuits are electrically connected with the AD conversion circuit, each DD conversion circuit comprises second output branches in one-to-one correspondence with the charging output ends, and each second output branch is provided with a switching circuit for controlling the corresponding second output branch to be connected or disconnected; and the switching circuits are respectively connected with the main controller.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and in particular to a charging circuit, a charging control method and a charger. Background Art

[0002] Chargers are a common household device in people's daily lives. Many household appliances such as mobile phones, computers, and wearable electronic devices use chargers.

[0003] The styles and uses of existing chargers vary. In order to provide higher efficiency, the charger usually includes dual charging ports that are connected to two devices to be charged at the same time. The charger contains a charging circuit that provides output voltage to the corresponding charging ports after AC-DC conversion and DC-DC conversion, so that the dual charging ports can receive charging devices separately or simultaneously. However, the types of devices to be charged are rich and varied, and the required charging voltages are often different. When any type of device to be charged is connected, it is necessary to obtain the output voltage through AC-DC conversion (i.e. AD conversion) and DC-DC conversion (i.e. DD conversion). The need to use a DD conversion circuit will inevitably lead to efficiency loss, and the maximum output power of the charger product will also be limited. Summary of the invention

[0004] In order to solve the existing technical problems, the present application provides a charging circuit, a charging control method and a charger which have high versatility, low efficiency loss and can maintain the advantage of maximum power output.

[0005] In a first aspect, a charging circuit is provided, comprising:

[0006] Main controller;

[0007] A plurality of charging output terminals are respectively connected to the main controller and are used to respectively connect to devices to be charged;

[0008] The AD conversion circuit comprises a first output branch corresponding to the charging output terminal, wherein the first output branch is provided with a switch circuit for controlling the corresponding first output branch to be turned on or off;

[0009] A plurality of DD conversion circuits are electrically connected to the AD conversion circuit, each of the DD conversion circuits comprises a second output branch corresponding to the charging output terminal one by one, and each of the second output branches is provided with a switch circuit for controlling the corresponding second output branch to be turned on or off;

[0010] The switch circuits are connected to the main controllers respectively.

[0011] In a second aspect, a charging control method is also provided, comprising:

[0012] The main controller determines the working state and output mode corresponding to the charging output terminal according to the charging demand parameters of the charging devices currently connected to the multiple charging output terminals;

[0013] If the output mode of the target charging output terminal is the direct output mode, the main controller controls the switch circuit between the AD conversion circuit and the target charging output terminal to be turned on, and provides a charging output to the target charging output terminal through the AD conversion circuit;

[0014] If the output mode of the target charging output terminal is the buck mode, the main controller controls the switch circuit between the AD conversion circuit and the target charging output terminal to be disconnected, controls the switch circuit of the DD conversion circuit connected to the target charging output terminal to be turned on, and provides a charging output to the target charging output terminal through the DD conversion circuit.

[0015] In a third aspect, a charger is also provided, including:

[0016] a housing including a plurality of charging ports;

[0017] The charging circuit as described in any embodiment of the present application is arranged inside the shell, and the multiple charging output terminals in the charging circuit are respectively aligned with the charging port.

[0018] In the charging circuit provided in the above embodiment, the AD conversion circuit includes a first output branch corresponding to a plurality of charging output terminals, and a switch circuit for controlling the first output branch to be turned on or off is provided on the first output branch, and a switch circuit for controlling the second output branch corresponding to each DD conversion circuit and the charging output terminal is provided on the second output branch to control the second output branch to be turned on or off. In this way, the main controller can control the switch circuit according to the charging demand of the device to be charged connected to the charging output terminal. For low-power devices to be charged, the charging output can be provided to the charging output terminal through the AD conversion circuit and the DD conversion circuit, and for high-power devices to be charged, the charging output can be directly provided to the charging output terminal through the AD conversion circuit, thereby avoiding the efficiency loss caused by the DD conversion circuit, ensuring the maximum power output advantage, and also ensuring the versatility of multiple charging output terminals being connected to multiple devices to be charged either alone or simultaneously.

[0019] In the above embodiments, the charging control method, the charger and the corresponding charging circuit embodiments belong to the same concept, and thus have the same technical effects as the charging circuit embodiments, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. 4 is a schematic diagram of a charging circuit in an embodiment.

[0021] Figure 2 is a schematic diagram of a charging circuit in another embodiment.

[0022] Figure 3 FIG. 4 is a circuit diagram of a switch circuit and a feedback circuit in a charging circuit in an embodiment.

[0023] Figure 4 FIG. 4 is a flow chart of a charging control method in an embodiment.

[0024] Figure 5 FIG. 4 is a schematic diagram of the structure of a charger in one embodiment. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0027] In the following description, the expression "some embodiments" is involved, which describes a subset of all possible embodiments. It should be noted that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

[0028] In the following description, the terms "first, second, and third" are merely used to distinguish similar objects and do not represent a specific order or quantity limitation for the objects. It can be understood that "first, second, and third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0029] See also Figure 1 , a charging circuit provided in an embodiment of the present application, includes: a main controller 20; a plurality of charging output terminals 10, respectively connected to the main controller 20, and used to be respectively connected to a device to be charged 60; an AD conversion circuit 30, including a first output branch corresponding to the charging output terminal 10, and a switch circuit 50 for controlling the corresponding first output branch to be turned on or off is provided on the first output branch; a plurality of DD conversion circuits 40, electrically connected to the AD conversion circuit 30, each DD conversion circuit 40 includes a second output branch corresponding to the charging output terminal 10 one by one, and a switch circuit 50 for controlling the corresponding second output branch to be turned on or off is provided on the second output branch; the switch circuits 50 are respectively connected to the main controller 20.

[0030] The AD conversion circuit 30 is used to receive an AC input power supply and convert the AC input power supply into a DC power supply through AC-DC conversion and voltage reduction processing. The DD conversion circuit 40 is connected to the AD conversion circuit 30 and is used to perform voltage step-up / voltage step-down processing on the DC power supply converted by the AD conversion circuit 30 and convert it into a DC output voltage of a target magnitude.

[0031] The charging output terminal 10 refers to the output terminal of the charging circuit. The multiple charging output terminals 10 usually correspond to the number of charging ports on the charger. Each charging port can be connected to a device to be charged 60. The charging circuit can choose to provide charging output directly to the corresponding charging output terminal 10 through the AD conversion circuit 30, or provide charging output to the corresponding charging output terminal 10 through the DD conversion circuit 40, according to the charging demand voltage required by the device to be charged 60 currently connected to each charging port. The charging output can refer to at least one of the output voltage, output current, and output power of the target size.

[0032] In the above embodiment, the AD conversion circuit 30 includes a first output branch corresponding to a plurality of charging output terminals 10, and a switch circuit 50 for controlling the first output branch to be turned on or off is provided. A second output branch corresponding to each DD conversion circuit 40 and the charging output terminal 10 is provided with a switch circuit 50 for controlling the first output branch to be turned on or off. In this way, the main controller 20 can control the switch circuit 50 according to the charging demand of the device to be charged 60 connected to the charging output terminal 10. For low-power devices to be charged 60, charging output can be provided to the charging output terminal 10 through the AD conversion circuit 30 and the DD conversion circuit 40, and for high-power devices to be charged 60, charging output can be provided directly to the charging output terminal 10 through the AD conversion circuit 30, thereby avoiding the efficiency loss caused by the DD conversion circuit 40, ensuring the maximum power output advantage, and also ensuring the versatility of multiple charging output terminals 10 being connected to multiple devices to be charged 60 either alone or simultaneously.

[0033] In some embodiments, please refer to Figure 2, the charging output terminal 10 includes a first charging output terminal 11 and a second charging output terminal 12, the DD conversion circuit 40 includes a first DD conversion circuit 41 corresponding to the first charging output terminal 11, and a second DD conversion circuit 42 corresponding to the second charging output terminal 12; the switch circuit 50 includes a first switch circuit 51 connected between the first DD conversion circuit 41 and the first charging output terminal 11, a second switch circuit 52 connected between the second DD conversion circuit 42 and the second charging output terminal 12, a third switch circuit 53 connected between the AD conversion circuit 30 and the first charging output terminal 11, and a fourth switch circuit 54 connected between the AD conversion circuit 30 and the second charging output terminal 12. In this embodiment, the number of the charging output terminals 10 is two, and the AD conversion circuit 30 includes two first output branches corresponding to the first charging output terminal 11 and the second charging output terminal 12, specifically, an output branch 1 formed between the AD conversion circuit 30 and the first charging output terminal 11, whose on-off is controlled by the first switch circuit 51, and an output branch 2 formed between the AD conversion circuit 30 and the second charging output terminal 12, whose on-off is controlled by the second switch circuit 52. The DD conversion circuit includes two second output branches corresponding to the first charging output terminal 11 and the second charging output terminal 12, specifically, an output branch 3 whose on / off is controlled by the third switch circuit 53 is formed between the first DD conversion circuit 41 and the first charging output terminal 11, and an output branch 4 whose on / off is controlled by the fourth switch circuit 54 is formed between the second DD conversion circuit 42 and the second charging output terminal 12. The main controller 20 can control the corresponding output branch to be turned on or off by independently controlling the on / off of the first switch circuit 51, the second switch circuit 52, the third switch circuit 53 and the fourth switch circuit 54 according to the situation that the first charging output terminal 11 and the second charging output terminal 12 are respectively connected to the device to be charged 60, so that for the low-power device to be charged 60, the charging output can be provided to the charging output terminal 10 through the AD conversion circuit 30 and the DD conversion circuit 40, and for the high-power device to be charged 60, the charging output can be directly provided to the charging output terminal 10 through the AD conversion circuit 30.

[0034] Optional, please refer to Figure 3The first switch circuit 51 includes a first field effect transistor Q1, the gate of the first field effect transistor Q1 is connected to the first control terminal VOUT1 of the main controller 20, the source and drain of the first field effect transistor Q1 are respectively connected to the output terminal VOUTA of the first DD conversion circuit 41 and the first charging output terminal 11 (VBUSA), and the second switch circuit 52 includes a second field effect transistor Q5, the gate of the second field effect transistor Q5 is connected to the second control terminal VOUT2 of the main controller 20, the source and drain of the second field effect transistor Q5 are respectively connected to the output terminal VOUTB of the second DD conversion circuit 42 and the second charging output terminal 12 (VBUSA). B) connection; the third switch circuit 53 includes a third field effect transistor Q7, the gate of the third field effect transistor Q7 is connected to the third control terminal VOUT3 of the main controller 20, and the source and drain of the third field effect transistor Q7 are respectively connected to the output terminal VIN of the AD conversion circuit 30 and the first charging output terminal 11 (VBUSA); the fourth switch circuit 54 includes a fourth field effect transistor Q8, the gate of the fourth field effect transistor Q8 is connected to the fourth control terminal VOUT4 of the main controller 20, and the source and drain of the fourth field effect transistor Q8 are respectively connected to the output terminal VIN of the AD conversion circuit 30 and the second charging output terminal 12 (VBUSB). Among them, the first switch circuit 51, the second switch circuit 52, the third switch circuit 53 and the fourth switch circuit 54 all use field effect transistors, and utilize the advantages of low driving power, fast switching speed, high reliability and low cost of the field effect transistors to form a charging circuit with a simpler overall structure, higher reliability and lower cost. The charging circuit can switch the AD conversion circuit 30 and the DD conversion circuit 40 to provide charging output according to the charging requirements of the electronic devices to be charged connected to the charging output terminal 10.

[0035] Optionally, the AD conversion circuit 30 includes a feedback circuit 31 connected to the output terminal VIN of the AD conversion circuit 30; the feedback circuit 31 includes a first voltage-dividing resistor R19 and a second voltage-dividing resistor R18 connected in series between the output terminal VIN and the electrode ground GND, a third voltage-dividing resistor R38 connected in parallel with the second voltage-dividing resistor R18, and a switch tube Q4, the gate of the switch tube Q4 is connected to the feedback control terminal FB_G of the main controller 20 as the feedback signal terminal FB of the feedback circuit 31, and the source and drain of the switch tube Q4 are respectively connected to the third voltage-dividing resistor R38 and the electrode ground GND. The main controller 20 adjusts and controls the output of the AD conversion circuit 30 according to the feedback voltage of the feedback signal terminal FB. The feedback circuit 31 is connected in parallel with the second voltage-dividing resistor R18. The conduction and cutoff of the switch tube Q4 can adjust the total resistance of the feedback circuit 31, adjust the circuit performance of the feedback circuit 31, prevent the circuit elements from being damaged due to overcurrent, and thus protect the circuit elements.

[0036] See also Figure 4On the other hand, the present application provides a charging control method, comprising:

[0037] S101, a main controller determines a working state and an output mode corresponding to a charging output terminal according to charging demand parameters of a charging device currently connected to a plurality of charging output terminals.

[0038] The charging requirement parameter of the device to be charged 60 generally refers to at least one of the charging voltage, charging current and charging power. The charging requirement parameter can generally be determined according to the charging protocol supported by the device to be charged 60. For example, after the charger is connected to the device to be charged 60, the main controller 20 can communicate and exchange with the device to be charged 60 through a specific charging protocol to negotiate the charging parameters, thereby determining the charging requirement parameter of the device to be charged 60.

[0039] The working state of the charging output terminal 10 mainly includes a charging state where the charging output terminal 10 is currently connected to the device to be charged 60 , and an idle state where the charging output terminal 10 is currently not connected to the device to be charged 60 .

[0040] The output mode of the charging output terminal 10 mainly refers to a direct output mode in which the charging output is directly performed through the output branch of the AD conversion circuit 30 when the charging output terminal 10 is connected to a high-power device to be charged 60, and a buck mode in which the charging output is performed through the output branch of the AD conversion circuit 30 and the DD conversion circuit 40 when the charging output terminal 10 is connected to a low-power device to be charged 60.

[0041] S103, if the output mode of the target charging output terminal is the direct output mode, the main controller controls the switch circuit between the AD conversion circuit and the target charging output terminal to be turned on, and provides a charging output to the target charging output terminal through the AD conversion circuit.

[0042] The working states and output modes of the multiple charging output terminals 10 can be independent of each other. For the convenience of distinction and description, any charging output terminal 10 currently connected to the device to be charged 60 is used as the target charging output terminal 10. When the main controller 20 determines that the output mode is the direct output mode according to the charging demand parameters of the device to be charged 60 currently connected to the target charging output terminal 10, the main controller 20 controls the switch circuit 50 on the output branch between the AD conversion circuit 30 and the target charging output terminal 10 to be turned on. At this time, the efficiency loss caused by the DD conversion circuit 40 can be avoided, and the AD conversion circuit 30 directly performs charging output to ensure the maximum power output advantage.

[0043] S105, if the output mode of the target charging output terminal is the buck mode, the main controller controls the switch circuit between the AD conversion circuit and the target charging output terminal to be disconnected, controls the switch circuit of the DD conversion circuit connected to the target charging output terminal to be turned on, and provides charging output to the target charging output terminal through the DD conversion circuit.

[0044] When the main controller 20 determines that the output mode is the buck mode based on the charging demand parameters of the charging device 60 currently connected to the target charging output terminal 10, the main controller 20 controls the switch circuit 50 on the output branch directly connected between the AD conversion circuit 30 and the target charging output terminal 10 to be disconnected, while the switch circuit 50 on the output branch between the DD conversion circuits 40 correspondingly connected to the target charging output terminal 10 is turned on, so that the AD conversion circuit 30 first converts the AC input power into a DC power through AC-DC conversion, and then the corresponding DD conversion circuit 40 converts the DC output voltage of the target size through boost / buck processing as the charging output of the target charging output terminal 10.

[0045] In the above embodiment, the working states and output modes of the multiple charging output terminals 10 can be independent of each other. The main controller 20 can control the switch circuit 50 according to the charging demand of the device to be charged 60 connected to the charging output terminal 10. For the target charging output terminal 10 currently connected to the low-power device to be charged 60, it can provide charging output to it through the AD conversion circuit 30 and the DD conversion circuit 40, and for the target charging output terminal 10 currently connected to the high-power device to be charged 60, it can directly provide charging output to it through the AD conversion circuit 30, thereby avoiding the efficiency loss caused by the DD conversion circuit 40, ensuring the maximum power output advantage, and also ensuring the versatility of multiple charging output terminals 10 being connected to a single or simultaneous connection to multiple devices to be charged 60.

[0046] In some embodiments, the charging requirement parameter includes a charging requirement voltage, and the charging control method further includes:

[0047] If multiple charging output terminals are currently connected to the charging device, the charging requirement voltages all meet the first interval voltage, and the charging requirement voltages are not equal, then the output mode of the charging output terminal corresponding to the maximum charging requirement voltage is determined to be the direct output mode, and the output mode of the charging output terminals corresponding to the other charging requirement voltages is the buck mode.

[0048] The AD conversion circuit 30 and the plurality of charging output terminals 10 form directly connected output branches. The first interval voltage refers to an output voltage range set according to a preset charging protocol and suitable for the AD conversion circuit 30 to directly convert the AC input power into a charging output.

[0049] In this embodiment, the first interval voltage refers to a voltage range set for the charging requirement parameters of a high-power electronic device to be charged. In an optional specific example, the first interval voltage mainly refers to a specific voltage value corresponding to the fast charging protocol, such as 15V, 20V (specifically 20V5A, 15V3A) corresponding to the PD (Power Delivery) protocol.

[0050] If multiple charging output terminals 10 are connected to the device to be charged 60 at the same time, since the output branches between the multiple charging output terminals 10 and the AD conversion circuit 30 all share the same AD conversion circuit 30, when the charging requirement voltages of the multiple charging devices 60 all belong to the first interval voltage, if the charging requirement voltages of the multiple charging devices 60 are different, only the output mode of the charging output terminal 10 corresponding to the maximum charging requirement voltage is set to the direct output mode, and the output modes of the charging output terminals 10 corresponding to the other charging requirement voltages are set to the buck mode. In this way, the AD conversion circuit 30 only keeps the output branches between the charging output terminals 10 connected to the device to be charged 60 with the maximum charging requirement voltage turned on, while the other charging output terminals 10 provide charging outputs to them through the AD conversion circuit 30 and the DD conversion circuit 40, so as to take into account the maximum power output advantage of directly charging the device to be charged 60 through the AD conversion circuit 30, avoid the efficiency loss caused by the charging output of the charging output terminal 10 having to be converted by the DD conversion circuit 40, and maintain the commonality of the multiple charging output terminals 10.

[0051] In some embodiments, the charging control method further includes:

[0052] If the multiple charging output terminals are currently connected to the charging devices, the charging requirement voltages all meet the first interval voltage, and the charging requirement voltages are equal, it is determined that the output modes of the multiple charging output terminals are all direct output modes.

[0053] If multiple charging output terminals 10 are connected to a device to be charged 60 at the same time, and the charging requirement voltages of the multiple devices to be charged 60 all belong to the first interval voltage, if the charging requirement voltages of the multiple devices to be charged 60 are the same, then the output modes of the multiple charging output terminals 10 are all direct output modes. In this way, the output branches between the AD conversion circuit 30 and the multiple charging output terminals 10 are all turned on to fully utilize the maximum power output advantage of the AD conversion circuit 30 for directly charging the device to be charged 60, thereby avoiding the efficiency loss caused by the charging output of the charging output terminal 10 having to be converted by the DD conversion circuit 40.

[0054] In some embodiments, the charging control method further includes:

[0055] If the plurality of charging output terminals are currently connected to the devices to be charged and the charging demand voltages all meet the second interval voltage, it is determined that the output modes of the plurality of charging output terminals are all the buck mode.

[0056] The second interval voltage refers to the output voltage range that triggers the DD conversion circuit 40 to provide charging output to the charging output terminal 10. In this embodiment, the second interval voltage refers to the voltage range set for the charging requirement parameters of the low-power electronic device to be charged, such as 3.3V-15V (specifically, it can be 5V3A, 9V3A, 12V3A). If multiple charging output terminals 10 are connected to the charging device 60 at the same time, and the charging requirement voltages of the multiple charging devices 60 belong to the second interval voltage, the main controller 20 controls the switch circuits 50 on the output branches between the AD conversion circuit 30 and the multiple charging output terminals 10 to be disconnected, while maintaining the charging output provided to each charging output terminal 10 through each DD conversion circuit 40.

[0057] It should be noted that the DD conversion circuit 40 corresponds one-to-one to the multiple charging output terminals 10 and is relatively independent. When the multiple charging output terminals 10 are all connected to the devices to be charged 60, and the charging requirement voltage of each device to be charged 60 is less than the minimum value of the output voltage directly output by the AD conversion circuit 30, the main controller 20 can control each DD conversion circuit 40 to output the corresponding charging voltage of the target size required by the device to be charged 60 to which the multiple charging output terminals 10 are respectively connected, according to the charging requirement voltage required by each device to be charged 60.

[0058] In some embodiments, the charging control method further includes:

[0059] If multiple charging output terminals are currently connected to the charging devices and the charging demand voltages meet the first voltage interval and the second voltage interval respectively, it is determined that the output mode of the charging output terminal that meets the first voltage interval is the direct output mode, and the output mode of the charging output terminal that meets the second voltage interval is the buck mode.

[0060] Independent output branches for directly providing charging outputs by the AD conversion circuit 30 are formed between the AD conversion circuit 30 and the multiple charging output terminals 10; and independent output branches for independently providing charging outputs to the corresponding charging output terminals 10 are formed between the DD conversion circuits 40 corresponding to the multiple charging output terminals 10 one by one and the multiple charging output terminals 10, respectively. Each DD conversion circuit 40 independently provides an output branch for charging output to the corresponding charging output terminal 10. In this way, if the devices to be charged 60 currently connected to multiple charging output terminals 10 belong to the first voltage interval and the second voltage interval respectively, when the main controller 20 recognizes that the charging requirement voltage requested by the device to be charged 60 connected to the charging output terminal 10 belongs to the first voltage interval, it sends a voltage direct output instruction to the AD conversion circuit 30, keeps the switch circuit 50 on the output branch between the AD conversion circuit 30 and the corresponding charging output terminal 10 closed, and the AD conversion circuit 30 directly provides the charging output to the corresponding charging output terminal 10; when the main controller 20 recognizes that the charging requirement voltage requested by the device to be charged 60 connected to the charging output terminal 10 belongs to the second voltage interval, it sends a voltage adjustment instruction to the corresponding DD conversion circuit 40, controls the switch circuit 50 on the output branch on the corresponding DD conversion circuit 40 to close, and adjusts the voltage to the charging requirement voltage required by the corresponding charging output terminal 10 through the DD conversion circuit 40, and provides charging output to it.

[0061] In some embodiments, the charging control method further includes:

[0062] If only one charging output terminal is currently connected to the device to be charged, when the corresponding charging requirement voltage meets the first interval voltage, the output mode of the charging output terminal is determined to be the direct output mode; when the corresponding charging requirement voltage meets the second interval voltage, the output mode of the charging output terminal is determined to be the buck mode.

[0063] Multiple charging output terminals 10 can be connected to the charging device 60 for charging at the same time, or only one charging output terminal 10 can be connected to the charging device 60 for charging. When only one charging output terminal 10 is connected to the charging device 60, the main controller 20 determines that the output mode of the charging output terminal 10 is the direct output mode according to the charging requirement voltage requested by the currently connected charging device 60, which belongs to the first interval voltage. The main controller 20 sends a voltage direct output instruction to the AD conversion circuit 30, keeps the switch circuit 50 on the output branch between the AD conversion circuit 30 and the corresponding charging output terminal 10 closed, and the AD conversion circuit 30 directly provides the charging output to the corresponding charging output terminal 10. When the charging requirement voltage requested by the currently connected charging device 60 belongs to the second interval voltage, the main controller 20 determines that the output mode of the charging output terminal 10 is the buck mode, sends a voltage adjustment instruction to the corresponding DD conversion circuit 40, controls the switch circuit 50 on the output branch on the corresponding DD conversion circuit 40 to close, and adjusts the voltage to the charging requirement voltage required by the corresponding charging output terminal 10 through the DD conversion circuit 40, and provides the charging output to it.

[0064] In an optional example, the charging output terminal of the charging circuit includes a first charging output terminal and a second charging output terminal. The main controller determines the working state and output mode corresponding to the charging output terminal according to the charging demand parameters of the charging device currently connected to the multiple charging output terminals, including:

[0065] If the first charging output terminal and the second charging output terminal are both connected to the device to be charged, determining the output modes of the first charging output terminal and the second charging output terminal includes at least one of the following:

[0066] When the charging demand voltages corresponding to the first charging output terminal and the second charging output terminal both meet the first interval voltage, and the charging demand voltages are not equal, it is determined that the output mode of the charging output terminal with a relatively larger charging demand voltage is the direct output mode, and the output mode of the other charging output terminal is the buck mode;

[0067] If the charging requirement voltages corresponding to the first charging output terminal and the second charging output terminal both meet the first interval voltage and the charging requirement voltages are equal, determining that the output mode of the first charging output terminal and the second charging output terminal is a direct output mode;

[0068] If the charging requirement voltages corresponding to the first charging output terminal and the second charging output terminal both meet the second interval voltage, it is determined that the output modes of the first charging output terminal and the second charging output terminal are both buck modes.

[0069] In this embodiment, taking the example that the charging output terminals 10 include two, the main controller 20 determines the output modes corresponding to the first charging output terminal 11 and the second charging output terminal 12 respectively according to whether the first charging output terminal 11 and the second charging output terminal 12 are simultaneously connected to the device to be charged 60, and the charging demand voltages requested by the respectively connected devices to be charged 60 belong to the first interval voltage and the second interval voltage respectively. If it is determined that the output mode of the first charging output terminal 11 is the direct output mode, the main controller 20 controls the switch circuit 50 on the output branch between the AD conversion circuit 30 and the first charging output terminal 11 to be turned on, and the switch circuit 50 on the output branch between the DD conversion circuit 40 and the first charging output terminal 11 to be turned on. 50 is cut off, and the AD conversion circuit 30 directly provides a charging output to the first charging output terminal 11; if it is determined that the output mode of the first charging output terminal 11 is the buck mode, the main controller 20 controls the switch circuit 50 on the output branch between the AD conversion circuit 30 and the first charging output terminal 11 to be cut off, and the switch circuit 50 on the output branch between the DD conversion circuit 40 and the first charging output terminal 11 is turned on, and the DD conversion circuit 40 further regulates the output of the AD conversion circuit 30 and provides a charging output to the first charging output terminal 11; for the second charging output terminal 12, the main controller 20 controls the direct output mode or the buck mode according to its corresponding output mode, and the control method is the same, which will not be repeated here.

[0070] In some embodiments, the charging control method further includes:

[0071] If only one of the first charging output terminal and the second charging output terminal is connected to the device to be charged, determining the output mode of the first charging output terminal or the second charging output terminal corresponding to the device to be charged includes at least one of the following:

[0072] If the charging requirement voltage corresponding to the first charging output terminal or the second charging output terminal corresponding to the device to be charged meets the first interval voltage, the output mode of the corresponding first charging output terminal or the second charging output terminal is determined to be the direct output mode;

[0073] If the charging requirement voltage corresponding to the first charging output terminal or the second charging output terminal corresponding to the device to be charged meets the second interval voltage, the output mode of the corresponding first charging output terminal or the second charging output terminal is determined to be the buck mode.

[0074] Still taking the example of two charging output terminals 10, the main controller 20 determines whether the output mode corresponding to the first charging output terminal 11 or the second charging output terminal 12 is the direct output mode or the buck mode according to whether the first charging output terminal 11 and the second charging output terminal 12 are simultaneously connected to the device 60 to be charged, and whether the charging demand voltage requested by the respectively connected devices 60 to be charged belongs to the first interval voltage and the second interval voltage respectively. When only the first charging output terminal 11 or the second charging output terminal 12 is connected to the device 60 to be charged, the main controller 20 directly determines whether the output mode corresponding to the first charging output terminal 11 or the second charging output terminal 12 is the direct output mode or the buck mode according to whether the charging demand voltage requested by the connected device 60 to be charged belongs to the first interval voltage and the second interval voltage.

[0075] See also Figure 5 On the other hand, the present application provides a charger, which includes a housing 71 and a plurality of charging ports 71; the charging circuit of any of the foregoing embodiments of the present application is disposed inside the housing 71, and a plurality of charging output terminals in the charging circuit are respectively aligned with the charging ports 71. In the present embodiment, the charging port 71 is, for example, a Type-C or Lightning interface (or connector), and in other embodiments, the charging port 71 may also be a wireless charging transmitter.

[0076] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A charging circuit, characterized in that: include: Main controller; A plurality of charging output terminals are respectively connected to the main controller and are used to respectively connect to devices to be charged; The AD conversion circuit comprises a first output branch corresponding to the charging output terminal, wherein the first output branch is provided with a switch circuit for controlling the corresponding first output branch to be turned on or off; A plurality of DD conversion circuits are electrically connected to the AD conversion circuit, each of the DD conversion circuits comprises a second output branch corresponding to the charging output terminal one by one, and each of the second output branches is provided with a switch circuit for controlling the corresponding second output branch to be turned on or off; The switch circuits are connected to the main controllers respectively.

2. The charging circuit according to claim 1, characterized in that: The charging output terminal includes a first charging output terminal and a second charging output terminal, and the DD conversion circuit includes a first DD conversion circuit corresponding to the first charging output terminal and a second DD conversion circuit corresponding to the second charging output terminal; The switch circuit includes a first switch circuit connected between the first DD conversion circuit and the first charging output terminal, a second switch circuit connected between the second DD conversion circuit and the second charging output terminal, a third switch circuit connected between the AD conversion circuit and the first charging output terminal, and a fourth switch circuit connected between the AD conversion circuit and the second charging output terminal.

3. The charging circuit according to claim 2, characterized in that: The first switch circuit includes a first field effect transistor, a gate of the first field effect transistor is connected to the first control terminal of the main controller, and a source and a drain of the first field effect transistor are respectively connected to the output terminal of the first DD conversion circuit and the first charging output terminal; The second switch circuit includes a second field effect transistor, a gate of the second field effect transistor is connected to the second control terminal of the main controller, and a source and a drain of the second field effect transistor are respectively connected to the output terminal of the second DD conversion circuit and the second charging output terminal; The third switch circuit comprises a third field effect transistor, a gate of the third field effect transistor is connected to the third control terminal of the main controller, and a source and a drain of the third field effect transistor are respectively connected to the output terminal of the AD conversion circuit and the first charging output terminal; The fourth switch circuit includes a fourth field effect transistor, a gate of the fourth field effect transistor is connected to the fourth control terminal of the main controller, and a source and a drain of the fourth field effect transistor are respectively connected to the output terminal of the AD conversion circuit and the second charging output terminal.

4. The charging circuit according to claim 2, characterized in that: The AD conversion circuit includes a feedback circuit connected to the output end; The feedback circuit includes a first voltage-dividing resistor and a second voltage-dividing resistor connected in series between the output end and the electrode ground, a third voltage-dividing resistor connected in parallel with the second voltage-dividing resistor, and a switch tube. The gate of the switch tube is connected to the feedback control end of the main controller as the feedback signal end of the feedback circuit, and the source and drain of the switch tube are respectively connected to the third voltage-dividing resistor and the electrode ground.

5. A charging control method, characterized in that: include: The main controller determines the working state and output mode corresponding to the charging output terminal according to the charging demand parameters of the charging devices currently connected to the multiple charging output terminals; If the output mode of the target charging output terminal is the direct output mode, the main controller controls the switch circuit between the AD conversion circuit and the target charging output terminal to be turned on, and provides a charging output to the target charging output terminal through the AD conversion circuit; If the output mode of the target charging output terminal is the buck mode, the main controller controls the switch circuit between the AD conversion circuit and the target charging output terminal to be disconnected, controls the switch circuit of the DD conversion circuit connected to the target charging output terminal to be turned on, and provides a charging output to the target charging output terminal through the DD conversion circuit.

6. The charging control method according to claim 5, characterized in that: The charging requirement parameter includes a charging requirement voltage, and the charging control method further includes: If multiple charging output terminals are currently connected to the charging device, the charging requirement voltages all meet the first interval voltage, and the charging requirement voltages are not equal, then the output mode of the charging output terminal corresponding to the maximum charging requirement voltage is determined to be the direct output mode, and the output mode of the charging output terminals corresponding to the other charging requirement voltages is the buck mode.

7. The charging control method according to claim 6, characterized in that: Also includes: If the plurality of charging output terminals are currently connected to the devices to be charged, the charging requirement voltages all meet the first interval voltage, and the charging requirement voltages are equal, it is determined that the output modes of the plurality of charging output terminals are all direct output modes.

8. The charging control method according to claim 6, characterized in that: Also includes: If the plurality of charging output terminals are currently connected to the devices to be charged and the charging demand voltages all meet the second interval voltage, it is determined that the output modes of the plurality of charging output terminals are all buck modes.

9. The charging control method according to claim 6, characterized in that: Also includes: If multiple charging output terminals are currently connected to the charging devices and the charging demand voltages meet the first voltage interval and the second voltage interval respectively, it is determined that the output mode of the charging output terminal that meets the first voltage interval is the direct output mode, and the output mode of the charging output terminal that meets the second voltage interval is the buck mode.

10. The charging control method according to claim 6, characterized in that: Also includes: If only one charging output terminal is currently connected to the device to be charged, when the corresponding charging requirement voltage meets the first interval voltage, the output mode of the charging output terminal is determined to be the direct output mode; when the corresponding charging requirement voltage meets the second interval voltage, the output mode of the charging output terminal is determined to be the buck mode.

11. The charging control method according to claim 5, characterized in that: The charging output terminal includes a first charging output terminal and a second charging output terminal; the main controller determines the working state and output mode corresponding to the charging output terminal according to the charging demand parameters of the charging device currently connected to the multiple charging output terminals, including: If the first charging output terminal and the second charging output terminal are both connected to the device to be charged, determining the output mode of the first charging output terminal and the second charging output terminal includes at least one of the following: When the charging demand voltages corresponding to the first charging output terminal and the second charging output terminal both meet the first interval voltage, and the charging demand voltages are not equal, it is determined that the output mode of the charging output terminal with a relatively larger charging demand voltage is the direct output mode, and the output mode of the other charging output terminal is the buck mode; If the charging requirement voltages corresponding to the first charging output terminal and the second charging output terminal both meet the first interval voltage, and the charging requirement voltages are equal, then determining that the output mode of the first charging output terminal and the second charging output terminal is a direct output mode; If the charging requirement voltages corresponding to the first charging output terminal and the second charging output terminal both meet the second interval voltage, it is determined that the output modes of the first charging output terminal and the second charging output terminal are both buck modes.

12. The charging control method according to claim 11, characterized in that: Also includes: If only one of the first charging output terminal and the second charging output terminal is connected to the device to be charged, determining the output mode of the first charging output terminal or the second charging output terminal corresponding to the device to be charged includes at least one of the following: If the charging requirement voltage corresponding to the first charging output terminal or the second charging output terminal corresponding to the device to be charged meets the first interval voltage, the output mode of the corresponding first charging output terminal or the second charging output terminal is determined to be the direct output mode; If the charging requirement voltage corresponding to the first charging output terminal or the second charging output terminal corresponding to the device to be charged meets the second interval voltage, the output mode of the corresponding first charging output terminal or the second charging output terminal is determined to be the buck mode.

13. A charger, characterized in that: include: a housing including a plurality of charging ports; The charging circuit according to any one of claims 1 to 4 is arranged inside the housing, and the plurality of charging output terminals in the charging circuit are respectively aligned with the charging port.

Images