Charging circuit and charging device
By combining an AD conversion circuit and an interface controller, intelligent power allocation in the charger is achieved, solving the problem of the charger's inability to effectively allocate power and improving charging efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN LANHE TECHNOLOGIES CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-07-03
AI Technical Summary
Existing chargers cannot effectively allocate charging power to different electronic devices, resulting in wasted charging power for some devices and insufficient charging for others, thus affecting charging efficiency.
By employing an AD conversion circuit and an interface controller, and through a combination of direct output branch and voltage regulation output branch, power is dynamically allocated based on the occupancy information of the charging output terminal, thereby achieving intelligent allocation of charging power.
It improves charging efficiency, avoids power waste, and ensures that each charging output provides the appropriate charging power according to actual needs.
Smart Images
Figure CN224459357U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of charging technology, and in particular to a charging circuit and charging device. Background Technology
[0002] Chargers are a common household device used in people's daily lives. Many electronic devices, such as mobile phones, computers, and wearable smart devices, use chargers.
[0003] Existing chargers vary in style and intended use. To provide higher efficiency, chargers typically include multiple charging ports that can simultaneously connect to multiple devices. The charger contains a charging circuit that provides output voltage to the corresponding charging ports after AC-DC conversion and DC-DC conversion. This allows multiple charging ports to be used individually or simultaneously to receive devices. When a single device is used, the charger outputs all its total power to that single device. When multiple devices are connected simultaneously, the charger distributes the total power equally among the charging ports.
[0004] However, there is a wide variety of devices to be charged, and different electronic devices require different fast charging power. This method of equally distributing power to each charging port can easily lead to power waste at the charging ports of some electronic devices, while the required functions at the charging ports of other electronic devices cannot be met, thus affecting charging efficiency. Summary of the Invention
[0005] To address the existing technical problems, this application provides a charging circuit and charging device that can achieve intelligent power allocation and improve charging efficiency.
[0006] In a first aspect, this application provides a charging circuit, including an analog-to-digital (AD) conversion circuit, multiple interface controllers, multiple charging output terminals, and output branches respectively connected between each charging output terminal and the AD conversion circuit; the output branches include a direct-through output branch and a voltage-regulating output branch, the direct-through output branch being used to output the output voltage of the AD conversion circuit, and the voltage-regulating output branch being used to step down the output voltage of the AD conversion circuit before outputting; the multiple interface controllers are communicatively connected, and each interface controller controls the charging output terminal connected to it to select either the direct-through output branch or the voltage-regulating output branch to output at a target output power according to the occupancy information of the multiple charging output terminals.
[0007] Optionally, if only one of the first charging output terminal and the second charging output terminal is connected to the device to be charged, the first interface controller and the second interface controller control the port currently connected to the device to be charged to select the output power of the direct output branch according to the power dynamic allocation strategy; if both the first charging output terminal and the second charging output terminal are connected to the device to be charged, the first interface controller and the second interface controller control one of the first charging output terminal and the other to select the output power of the direct output branch and the other to select the output power of the voltage regulation output branch according to the power dynamic allocation strategy.
[0008] Optionally, the dynamic power allocation strategy includes at least one of the following:
[0009] Of the first charging output terminal and the second charging output terminal, the one with the greater required output power is selected to output at the first target output power via the direct output branch, and the one with the smaller required output power is selected to output at the second target output power via the voltage regulating output branch.
[0010] If the required output power of the devices to be charged connected to the first charging output terminal and the second charging output terminal is the same, then the port connected to the device to be charged first selects the direct output branch to output at the first target output power, and the port connected to the device to be charged later selects the voltage regulating output branch to output at the second target output power.
[0011] If the required output power of the devices to be charged connected to the first charging output terminal and the second charging output terminal is the same, then the port with the relatively higher default priority will select the direct output branch to output at the first target output power, and the port with the relatively lower default priority will select the voltage regulating output branch to output at the second target output power.
[0012] Optionally, the charging output terminal further includes a third charging output terminal connected to the first interface controller; the first interface controller is further configured to send the occupancy information of the third charging output terminal to the second interface controller, and the first interface controller and the second interface controller are further configured to control the first charging output terminal, the second charging output terminal and the third charging output terminal to output together according to the power dynamic allocation strategy based on the occupancy information of the third charging output terminal.
[0013] Optionally, if only two of the first, second, and third charging output terminals are connected to the device to be charged, the first and second interface controllers, based on the occupancy information of each charging output terminal, control one of the two ports connected to the device to be charged to select the direct output branch to output at the first target output power and the other to select the regulated output branch to output at the second target output power; if all three of the first, second, and third charging output terminals are connected to the device to be charged, the first and second interface controllers, based on the three-port power allocation strategy, control one of the three ports to select the direct output branch to output at the first target output power, and the other two to select the regulated output branch to output at the second and third target output powers, respectively.
[0014] Optionally, the three-port power allocation strategy includes at least one of the following:
[0015] Based on the relative magnitudes of the output power required by the devices connected to the three ports, the device with the highest required output power is selected to output through the direct output branch at the first target output power, while the other two ports are selected to output through the voltage-regulated output branches at the second and third target output power, respectively.
[0016] If the required output power of the three devices connected to the charging ports is the same, then among the three ports, according to the order in which the devices are connected, the port that is connected to the charging devices first selects the direct output branch to output at the first target output power, and the two ports that are connected to the charging devices later select the voltage regulating output branch to output at the second target output power and the third target output power, respectively.
[0017] If the three devices connected to the charging ports have the same required output power, then among the three ports, according to the default priority, the port with the highest default priority will select the direct output branch to output at the first target output power, and the other ports will select the voltage-regulated output branch to output at the second target output power and the third target output power, respectively.
[0018] Optionally, the interface controller further includes a third interface controller, and the charging output terminal further includes a third charging output terminal connected to the AD conversion circuit through a step-down output branch formed by the third interface controller; the third interface controller can send the occupancy information of the third charging output terminal to the first interface controller and the second interface controller, the third interface controller controls the third charging output terminal to output according to a preset fixed power, and the first interface controller and the second interface controller control the first charging output terminal and the second charging output terminal to output according to a power dynamic allocation strategy.
[0019] Optionally, each of the direct output branches is provided with a switch module, which is connected to the interface controller connected to the corresponding charging output terminal. The switch module is used to connect or disconnect the AD conversion circuit from the corresponding charging output terminal. Each of the voltage-regulating output branches is provided with a DD conversion controller, which is connected to the interface controller connected to the corresponding charging output terminal. The DD conversion controller is used to step down the output voltage of the AD conversion circuit.
[0020] In another aspect, this application also provides a charging device, comprising:
[0021] The casing includes multiple charging ports;
[0022] The charging circuit described in any embodiment of this application is located inside the housing, the charging output terminal is a charging interface female, and the plurality of charging output terminals in the charging circuit are respectively aligned with the charging port.
[0023] The charging circuit provided in the above embodiment controls the output of each charging output terminal by having the interface controller directly determine the target output power corresponding to each charging output terminal based on the occupancy information of each connected charging output terminal. This enables intelligent allocation of charging power at different charging output terminals. The interface controller can make optimized charging output decisions more directly and efficiently based on the charging devices connected to multiple charging output terminals. Furthermore, the interface controller can control the corresponding charging output terminal to select either a direct output branch or a voltage-regulated output branch to output the target output power as needed. The direct output branch avoids the efficiency loss caused by voltage conversion in the voltage-regulated output branch, ensuring the advantage of maximum power output. It also ensures intelligent power allocation when multiple charging output terminals are connected individually or simultaneously to multiple devices to be charged.
[0024] In the above embodiments, the charging device and the corresponding charging circuit embodiment belong to the same concept and thus have the same technical effect as the charging circuit embodiment, which will not be repeated here. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of a charging circuit in one embodiment.
[0026] Figure 2 This is a circuit diagram of the interface controller and the through output branch corresponding to the multiple charging output terminals of the charging circuit in another embodiment.
[0027] Figure 3 This is a circuit diagram of a voltage regulation output circuit corresponding to multiple charging output terminals of a charging circuit in one embodiment.
[0028] Figure 4This is a circuit diagram of the interface controller and the through output branch corresponding to the multiple charging output terminals of the charging circuit in another embodiment.
[0029] Figure 5 This is a schematic diagram of a charging device in one embodiment. Detailed Implementation
[0030] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0031] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0032] In the following description, the phrase "some embodiments" refers to a subset of all possible embodiments. It should be noted that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.
[0033] In the following description, the terms "first, second, and third" are used merely to distinguish similar objects and do not represent a specific order or number of objects. It is understood that "first, second, and third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.
[0034] Please see Figure 1 One embodiment of this application provides a charging circuit, including an AD conversion circuit 10, multiple interface controllers 20, multiple charging output terminals 30, and output branches 40 respectively connected between each charging output terminal 30 and the AD conversion circuit 10. The output branches 40 include a direct output branch 41 and a regulated output branch 42. The direct output branch 41 outputs the output voltage of the AD conversion circuit 10, and the regulated output branch 42 steps down the output voltage of the AD conversion circuit 10 before outputting it. The multiple interface controllers 20 are communicatively connected, and each interface controller 20 controls the charging output terminal 30 connected to it to select either the direct output branch 41 or the regulated output branch 42 to output according to a target output power based on the occupancy information of the multiple charging output terminals 30.
[0035] The AD conversion circuit 10 receives AC input power and converts it to DC power via AC-DC conversion. Please refer to the relevant documentation. Figure 2The voltage-regulated output branch 42 typically includes a DC-DC converter circuit. It connects to the AD converter circuit 10 and the charging output terminal 30, and is used to step down the DC power supply converted by the AD converter circuit 10 to a target DC output voltage. The direct-through output branch 41 is the branch that directly outputs the output voltage of the AD converter circuit 10 to the corresponding charging output terminal 30.
[0036] The charging output terminal 30 refers to the output terminal of the charging circuit. There are at least two charging output terminals 30, and multiple charging output terminals 30 are connected to interface controllers 20, with each interface controller 20 connected to one or more charging output terminals 30. It should be noted that in charging circuits used in chargers and other charging devices, the multiple charging output terminals 30 are typically configured to correspond one-to-one with the charging ports on the charger, with each charging port capable of accommodating one device to be charged.
[0037] In the above embodiments, the output control of the charging circuit for each charging output terminal 30 is determined by the interface controller 20 based on the occupancy information of each charging output terminal 30. This determines the target output power corresponding to each charging output terminal 30, thereby realizing the intelligent allocation of charging power at different charging output terminals 30. The interface controller 20 can make optimized charging output decisions more directly and efficiently based on the situation of multiple charging output terminals 30 connected to the devices to be charged. Furthermore, the interface controller 20 can control the corresponding charging output terminal 30 to select either the direct output branch 41 or the voltage-regulated output branch 42 to output according to the target output power required. The setting of the direct output branch 41 can avoid the efficiency loss caused by voltage conversion in the voltage-regulated output branch 42, ensuring the maximum power output advantage, and also ensuring intelligent power allocation when multiple charging output terminals 30 are connected to a single device or multiple devices to be charged simultaneously.
[0038] Optional, please refer to the following: Figure 2 and Figure 3Each direct output branch 41 is equipped with a switch module 412, which is connected to the interface controller 20 connected to the corresponding charging output terminal 30. The switch module 412 is used to connect or disconnect the AD conversion circuit 10 and the corresponding charging output terminal 30. Each voltage-regulating output branch 42 is equipped with a DD conversion controller, which is connected to the interface controller 20 connected to the corresponding charging output terminal 30. The DD conversion controller is used to step down the output voltage of the AD conversion circuit 10. It should be noted that in this embodiment, the charging circuit uses the interface controller 20 to directly determine the target output power corresponding to each charging output terminal 30 based on the occupancy information of each connected charging output terminal 30, and directly controls the state of the output branch 40 of each charging output terminal 30 based on the final determined target output power. When the direct output branch 41 is selected for output, the interface controller 20 directly controls the switch module 412 on the direct output branch 41 to turn on, so that the output voltage of the AD conversion circuit 10 is directly output by the direct output branch 41.
[0039] In some embodiments, the interface controller 20 includes a first interface controller U7 and a second interface controller U5, and the charging output terminal 30 includes a two-port charging circuit comprising a first charging output terminal USB-C1 connected to the first interface controller U7 and a second charging output terminal USB-C3 connected to the second interface controller U5. The first interface controller U7 and the second interface controller U5 are respectively used to send the occupancy information of their respective connected charging output terminals 30 to each other. Based on the occupancy information of the first charging output terminal USB-C1 and the second charging output terminal USB-C3, the first interface controller U7 controls the first charging output terminal USB-C1, and the second interface controller U5 controls the second charging output terminal USB-C3 to output power according to a dynamic power allocation strategy. Specifically, the first interface controller U7 and the second interface controller U5 output power according to the status of the devices to be charged connected to their respective connected charging output terminals 30, based on the actual requested output power required by the connected devices, according to the dynamic power allocation strategy.
[0040] Optionally, the dynamic power allocation strategy includes a single-port power allocation strategy and a dual-port power allocation strategy. The corresponding power allocation strategy is adopted based on the actual situation where multiple charging output terminals 30 are connected to the devices to be charged, to determine the target output power of each charging output terminal 30 and then output it. For example, if only one of the first charging output terminal USB-C1 and the second charging output terminal USB-C3 is connected to the device to be charged, the first interface controller U7 and the second interface controller U5, according to the dynamic power allocation strategy, control the port currently connected to the device to select the direct output branch 41 to output power; if both the first charging output terminal USB-C1 and the second charging output terminal USB-C3 are connected to the devices to be charged, the first interface controller U7 and the second interface controller U5, according to the dynamic power allocation strategy, control one of the first charging output terminal USB-C1 and the second charging output terminal USB-C3 to select the direct output branch 41 to output power and the other to select the regulated output branch 42 to output power. In this embodiment, the first interface controller U7 and the second interface controller U5, based on the number of devices connected in real time and the actual output power requested by each device, use a power dynamic allocation strategy to ensure that at least one charging output terminal 30 can retain the direct output branch 41 for output and control the output power, making full use of the direct output branch 41 to improve power output efficiency and ensure the maximum power output advantage.
[0041] The dual-port power allocation strategy determines which charging output terminal 30 to use for output via the direct output branch 41 based on the requested output power required by the actually connected device to be charged. This strategy can be one or more. In an optional example, the first interface controller U7 and the second interface controller U5 determine which charging output terminal 30 selects the dual-port power allocation strategy using the direct output branch 41, which can include one or more of strategies A1, B1, and C1. Strategy A1: Among the first charging output port USB-C1 and the second charging output port USB-C3, the port with the greater required output power selects the direct output branch 41 to output at the first target output power, and the port with the smaller required output power selects the regulated output branch 42 to output at the second target output power. Strategy B1: If the required output power of the devices connected to the first charging output port USB-C1 and the second charging output port USB-C3 is the same, then among the first charging output port USB-C1 and the second charging output port USB-C3, the port connected to the device first selects the direct output branch 41 to output at the first target output power, and the port connected to the device later selects the regulated output branch 42 to output at the second target output power. Strategy C1: If the required output power of the devices connected to the first charging output port USB-C1 and the second charging output port USB-C3 is the same, then among the first charging output port USB-C1 and the second charging output port USB-C3, the port with the relatively higher default priority selects the direct output branch 41 to output at the first target output power, and the port with the relatively lower default priority selects the regulated output branch 42 to output at the second target output power.
[0042] In the above embodiments, the interface controller 20 determines which port to use for output via the pass-through output branch 41 according to different strategies based on the different situations of the devices to be charged connected to the first charging output port USB-C1 and the second charging output port USB-C3, so as to make full use of the pass-through output branch 41 to improve power output efficiency and ensure the advantage of maximum power output. In a specific example, both the first charging output port USB-C1 and the second charging output port USB-C3 are Type-C interfaces.
[0043] In some embodiments, the charging output terminal 30 further includes a third charging output terminal USB-C2 connected to the first interface controller U7. The first interface controller U7 is also used to send the occupancy information of the third charging output terminal USB-C2 to the second interface controller U5. The first interface controller U7 and the second interface controller U5 are also used to control the first charging output terminal USB-C1, the second charging output terminal USB-C3, and the third charging output terminal USB-C2 to output power together according to a dynamic power allocation strategy based on the occupancy information of the third charging output terminal USB-C2. In this embodiment, the same interface controller 20 can be configured with multiple charging output terminals 30. Without increasing the interface controller 20 and reducing the circuit hardware cost, the number of charging output terminals 30 can be increased, thereby expanding the application scenarios of the charging circuit.
[0044] Optionally, the dynamic power allocation strategy also includes a three-port power allocation strategy. For example, if only two of the first charging output port USB-C1, the second charging output port USB-C3, and the third charging output port USB-C2 are connected to the device to be charged, the occupancy information of each charging output port 30 of the first interface controller U7 and the second interface controller U5 controls one of the two ports connected to the device to be charged to select the direct output branch 41 to output at the first target output power, and the other to select the regulated output branch 42 to output at the second target output power; if all three ports are connected to the device to be charged, the first interface controller U7 and the second interface controller U5 control one of the three ports to select the direct output branch 41 to output at the first target output power, and the other two to select the regulated output branches 42 to output at the second target output power and the third target output power, respectively, according to the three-port power allocation strategy. In this embodiment, the first interface controller U7 is connected to two charging output terminals 30, and the second interface controller U5 is connected to one charging output terminal 30. If only one of them is connected to a device to be charged, the first interface controller U7 and the second interface controller U5 communicate with each other to know the current occupancy information of all charging output terminals 30, and decide to select the direct output branch 41 for output according to the single-port power allocation strategy. If only two of them are connected to a device to be charged, the first interface controller U7 and the second interface controller U5 communicate with each other to know the current occupancy information of all charging output terminals 30. Based on the occupancy information, the first interface controller U7 and the second interface controller U5 use a dual-port power allocation strategy to determine which of the corresponding charging output terminals 30 of the currently connected devices to be charged will choose to output through the direct output branch 41 and which will choose to output through the voltage-regulated output branch 42. If three devices are connected to the devices to be charged at the same time, the first interface controller U7 and the second interface controller U5 will communicate with each other to know the occupancy information of all the charging output terminals 30. Based on the three-port power allocation strategy, the first interface controller U7 and the second interface controller U5 will choose to output through the direct output branch 41 and which two will choose to output through the voltage-regulated output branch 42 after voltage regulation.
[0045] In one optional example, the three-port power allocation strategy determines which charging output terminal 30 to use for output via the direct output branch 41 based on the requested output power required by the actually connected devices. In another optional example, the first interface controller U7 and the second interface controller U5 determine that the three-port power allocation strategy for selecting the charging output terminal 30 to use the direct output branch 41 includes one or more of strategies A2, B2, and C2. Strategy A2: Based on the relative magnitude of the required output power of the devices connected to the three ports, the port with the highest required output power selects the direct output branch 41 to output at the first target output power, while the other two ports select the regulated output branch 42 to output at the second and third target output power, respectively. Strategy B2: If the required output power of the devices connected to the three ports is the same, then, according to the order in which the devices are connected, the port that connects to the devices first selects the direct output branch 41 to output at the first target output power, while the two ports that connect to the devices later select the regulated output branch 42 to output at the second and third target output power, respectively. Strategy C2: If the required output power of the devices connected to the three ports is the same, then among the three ports, according to the default priority, the port with the highest default priority selects the direct output branch 41 to output according to the first target output power, and the other ports select the voltage-regulated output branch 42 to output according to the second target output power and the third target output power respectively.
[0046] In the above embodiments, the interface controller 20 decides which port to use the direct output branch 41 for output according to different strategies based on the different situations of the devices to be charged connected to the first charging output terminal USB-C1, the second charging output terminal USB-C3, and the third charging output terminal USB-C2. This is to make full use of the direct output branch 41 to improve power output efficiency, ensure the maximum power output advantage, and expand the application scenarios of the charging circuit.
[0047] In a specific example, the first charging output port USB-C1, the second charging output port USB-C3, and the third charging output port USB-C2 are all Type-C interfaces.
[0048] In other embodiments, please refer to Figure 4The interface controller 20 also includes a third interface controller U6, and the charging output terminal 30 also includes a third charging output terminal USB-A1 connected to the AD conversion circuit 10 via a step-down output branch 40 formed by the third interface controller U6. The third interface controller U6 can send the occupancy information of the third charging output terminal USB-A1 to the first interface controller U7 and the second interface controller U5. The third interface controller U6 controls the third charging output terminal USB-A1 to output according to a preset fixed power. The first interface controller U7 and the second interface controller U5 control the first charging output terminal USB-C1 and the second charging output terminal USB-C3 to output according to a dynamic power allocation strategy. In this embodiment, a third interface controller U6 is added that can directly regulate the output of the AD conversion circuit 10 to a preset output voltage. The third interface controller U6 forms a single output branch 40 for the third charging output terminal USB-A1, outputting a fixed preset output voltage to meet the charging application requirements of certain specific types of devices to be charged. In a specific example, the first charging output terminal USB-C1 and the second charging output terminal USB-C3 are both Type-C interfaces, and the third charging output terminal USB-A1 is a Type-A interface.
[0049] Please see Figure 5 In another aspect, this application provides a charging device 70, including a housing 71 and a charging circuit according to any of the foregoing embodiments of this application. The housing 71 includes a plurality of charging ports 72. The charging circuit is disposed inside the housing 71, and the charging output terminal 30 is a female charging interface socket. The plurality of charging output terminals 30 in the charging circuit are respectively aligned with the charging ports 72. In an optional specific example, the charging device is a multi-port charger, and the charging port 72 refers to a through hole provided on the housing 71 for the corresponding insertion of the male charging interface of the device to be charged.
[0050] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A charging circuit, characterized by, It includes an AD conversion circuit, multiple interface controllers, multiple charging output terminals, and output branches respectively connected between each of the charging output terminals and the AD conversion circuit; The output branch includes a direct output branch and a voltage-regulated output branch. The direct output branch is used to output the output voltage of the AD conversion circuit, and the voltage-regulated output branch is used to step down the output voltage of the AD conversion circuit before outputting it. The multiple interface controllers are interconnected, and each interface controller controls the connected charging output terminal to select the direct output branch or the voltage-regulated output branch to output according to the target output power based on the occupancy information of the multiple charging output terminals.
2. The charging circuit of claim 1, wherein, The plurality of interface controllers includes a first interface controller and a second interface controller; The plurality of charging output terminals include a first charging output terminal connected to the first interface controller and a second charging output terminal connected to the second interface controller; The first interface controller and the second interface controller are respectively used to send the occupancy information of the charging output terminal connected to them to each other. According to the occupancy information of the first charging output terminal and the second charging output terminal, the first interface controller controls the first charging output terminal and the second interface controller controls the second charging output terminal to output power according to the power dynamic allocation strategy.
3. The charging circuit of claim 2, wherein, If only one of the first charging output terminal and the second charging output terminal is connected to the device to be charged, the first interface controller and the second interface controller respectively control the port currently connected to the device to be charged to select the output power of the direct output branch according to the power dynamic allocation strategy; If both the first charging output terminal and the second charging output terminal are connected to the device to be charged, the first interface controller and the second interface controller control one of the first charging output terminal and the other to select the output power of the direct output branch and the output power of the voltage-regulated output branch, respectively, according to the power dynamic allocation strategy.
4. The charging circuit of claim 3, wherein, The power dynamic allocation strategy includes at least one of the following: Of the first charging output terminal and the second charging output terminal, the one with the greater required output power is selected to output at the first target output power via the direct output branch, and the one with the smaller required output power is selected to output at the second target output power via the voltage regulating output branch. If the required output power of the devices to be charged connected to the first charging output terminal and the second charging output terminal is the same, then the port connected to the device to be charged first selects the direct output branch to output at the first target output power, and the port connected to the device to be charged later selects the voltage regulating output branch to output at the second target output power. If the required output power of the devices to be charged connected to the first charging output terminal and the second charging output terminal is the same, then the port with the relatively higher default priority will select the direct output branch to output at the first target output power, and the port with the relatively lower default priority will select the voltage regulating output branch to output at the second target output power.
5. The charging circuit of claim 2, wherein, The charging output terminal also includes a third charging output terminal connected to the first interface controller; The first interface controller is further configured to send the occupancy information of the third charging output terminal to the second interface controller. The first interface controller and the second interface controller are further configured to control the first charging output terminal, the second charging output terminal and the third charging output terminal to output together according to the power dynamic allocation strategy based on the occupancy information of the third charging output terminal.
6. The charging circuit of claim 5, wherein, If only two of the first charging output terminal, the second charging output terminal, and the third charging output terminal are connected to the device to be charged, the first interface controller and the second interface controller, based on the occupancy information of each charging output terminal, control one of the two ports connected to the device to be charged to select the direct output branch to output at the first target output power and the other to select the voltage-regulated output branch to output at the second target output power. If the first charging output terminal, the second charging output terminal, and the third charging output terminal are all connected to the device to be charged, the first interface controller and the second interface controller control one of the three ports to select the direct output branch to output at the first target output power according to the three-port power allocation strategy, and the other two select the voltage-regulated output branch to output at the second target output power and the third target output power respectively.
7. The charging circuit of claim 6, wherein, The three-port power allocation strategy includes at least one of the following: Based on the relative magnitudes of the output power required by the devices connected to the three ports, the device with the highest required output power is selected to output through the direct output branch at the first target output power, while the other two ports are selected to output through the voltage-regulated output branches at the second and third target output power, respectively. If the required output power of the three devices connected to the charging ports is the same, then among the three ports, according to the order in which the devices are connected, the port that is connected to the charging devices first selects the direct output branch to output at the first target output power, and the two ports that are connected to the charging devices later select the voltage regulating output branch to output at the second target output power and the third target output power, respectively. If the three devices connected to the charging ports have the same required output power, then among the three ports, according to the default priority, the port with the highest default priority will select the direct output branch to output at the first target output power, and the other ports will select the voltage-regulated output branch to output at the second target output power and the third target output power, respectively.
8. The charging circuit according to claim 2, characterized in that, The interface controller further includes a third interface controller, and the charging output terminal further includes a third charging output terminal connected to the AD conversion circuit through a step-down output branch formed by the third interface controller. The third interface controller can send the occupancy information of the third charging output terminal to the first interface controller and the second interface controller. The third interface controller controls the third charging output terminal to output according to a preset fixed power. The first interface controller and the second interface controller control the first charging output terminal and the second charging output terminal to output according to a power dynamic allocation strategy.
9. The charging circuit according to any one of claims 1 to 8, characterized by, Each of the direct output branches is provided with a switch module, which is connected to the interface controller connected to the corresponding charging output terminal. The switch module is used to connect or disconnect the AD conversion circuit from the corresponding charging output terminal. Each of the voltage-regulating output branches is equipped with a DD conversion controller, which is connected to the interface controller connected to the corresponding charging output terminal. The DD conversion controller is used to step down the output voltage of the AD conversion circuit.
10. A charging device, characterized by include: The casing includes multiple charging ports; The charging circuit as described in any one of claims 1 to 9 is located inside the housing, the charging output terminal is a charging interface female, and the plurality of charging output terminals in the charging circuit are respectively aligned with the charging port.