Charging control circuit for multi-port charging equipment

Abstract

A charging control circuit used for a multi-port charging device comprises a power supply module, and the power supply module comprises a power factor correction unit connected with alternating current; a first power supply branch and a second power supply branch, the first power supply branch comprises a first resonant power supply module, a first protocol communication module and a first interface module, and the second power supply branch comprises a second resonant power supply module, a second protocol communication module and a second interface module; the communication end of the main control module is connected with the first protocol communication module and the second protocol communication module. When the charging control circuit is in a preset standby state, the main control module sends a power-off control signal to the power supply end of the power factor correction unit and the power supply end of the second resonant power supply module; the first resonant power supply module is configured to supply power to the first protocol communication module, the second protocol communication module and the main control module in a preset standby state. According to the invention, the problem of high standby power consumption of the multi-port charging device in the standby state can be solved.

Description

Technical Field

[0001] This invention relates to the field of charging technology, and more specifically to a charging control circuit for a multi-port charging device. Background Technology

[0002] With the widespread use of electronic products such as smartphones, tablets, laptops, and wearable devices, users have placed higher demands on the number of interfaces, output power, and charging speed of charging devices. Multi-port charging devices are gradually becoming common accessories in home, office, and travel scenarios. Existing multi-port charging devices typically connect to AC power, converting AC power into suitable DC power through power conversion circuits, and using protocol control chips to manage the voltage and current output of different interfaces to meet the needs of charging multiple devices simultaneously.

[0003] Existing multi-port charging devices often remain in standby mode for extended periods during actual use, with AC power connected but no external load. Traditional solutions, to maintain interface detection and control functions, typically keep the power factor correction unit and multiple power conversion branches continuously operating or in a state where they can be powered on at any time, resulting in high standby power consumption. Furthermore, existing multi-port charging devices fail to implement hierarchical power supply management based on the operating status of different interfaces, making it difficult to promptly cut off power to unnecessary branches when all interfaces are idle, causing unnecessary losses in power modules such as secondary power supply branches. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a charging control circuit for a multi-port charging device, comprising: A power supply module, the power supply module including a power factor correction unit, the input terminal of the power factor correction unit being connected to AC power; A first power supply branch and a second power supply branch are respectively connected to the power supply module. The first power supply branch includes a first resonant power module, a first protocol communication module, and a first interface module. The second power supply branch includes a second resonant power module, a second protocol communication module, and a second interface module. The main control module has its first output terminal connected to the power supply terminal of the second resonant power supply module, and its second output terminal connected to the power supply terminal of the power factor correction unit. The communication terminal of the main control module is connected to both the first protocol communication module and the second protocol communication module. The first protocol communication module is configured to detect the working status of the first interface module, and the second protocol communication module is configured to detect the working status of the second interface module; when the working status of both the first interface module and the second interface module is a preset standby state, the main control module sends a power-off control signal to the power supply terminal of the power factor correction unit and the power supply terminal of the second resonant power supply module. The first resonant power supply module is configured to supply power to the first protocol communication module, the second protocol communication module, and the main control module in the preset standby state.

[0005] In one embodiment, the first power supply branch further includes an LDO unit, the input terminal of the first resonant power module is connected to the first output terminal of the power factor correction unit, the first output terminal of the first resonant power module is connected to the first protocol communication module, the input terminal of the LDO unit is connected to the second output terminal of the first resonant power module, the output terminal of the LDO unit is connected to the first protocol communication module, the second protocol communication module and the main control module, and the output terminal of the first protocol communication module is connected to the input terminal of the first interface module. The input terminal of the second resonant power supply module is connected to the second output terminal of the power factor correction unit, the output terminal of the second resonant power supply module is connected to the second protocol communication module, and the output terminal of the second protocol communication module is connected to the input terminal of the second interface module. The first resonant power supply module is configured to supply power to the first protocol communication module, the second protocol communication module and the main control module through the LDO unit in the preset standby state.

[0006] In one embodiment, a first step-down module is further provided between the first resonant power supply module and the first protocol communication module, and a second step-down module is further provided between the second resonant power supply module and the second protocol communication module. The first protocol communication module is configured to turn off the power supply of the first step-down module in the preset standby state, and the second protocol communication module is configured to turn off the power supply of the second step-down module in the preset standby state. In one embodiment, the main control module includes a main control unit, a first power supply control unit, and a second power supply control unit. The output terminal of the first power supply control unit is connected to the power supply terminal of the power factor correction unit, the input terminal of the first power supply control unit is connected to the first resonant power module, the output terminal of the second power supply control unit is connected to the power supply terminal of the second resonant power module, and the input terminal of the second power supply control unit is connected to the first resonant power module.

[0007] In one embodiment, the first power supply branch further includes a first filtering unit; the first step-down module includes multiple first step-down sub-units; the first protocol communication module includes multiple first protocol communication units; the first interface module includes multiple first interface units; the input terminal of the first filtering unit is connected to the output terminal of the first resonant power supply module; and the output terminal of the first filtering unit is connected to each of the first step-down sub-units and the LDO unit. At least one of the first step-down sub-units, at least one of the first protocol communication units, and at least one of the first interface units constitute the first power supply branch.

[0008] In one embodiment, a third power supply branch is further included, which includes a third resonant power supply module, a third protocol communication module, a third interface module, and a third buck module. The input terminal of the third resonant power supply module is connected to the third output terminal of the power factor correction unit, the output terminal of the third resonant power supply module is connected to the input terminal of the third buck module, the output terminal of the third buck module is connected to the third protocol communication module, the output terminal of the third protocol communication module is connected to the input terminal of the third interface module, the power supply terminal of the third protocol communication module is connected to the output terminal of the LDO unit, and the communication terminal of the main control module is connected to the third protocol communication module. The third protocol communication module is configured to detect the working status of the third interface module. When the working status of the first interface module, the second interface module and the third interface module are all in a preset standby state, the main control module sends a power-off control signal to the power supply terminal of the third resonant power module. The third protocol communication module is configured to shut off the power supply to the third step-down module in the preset standby state; The first resonant power module is configured to supply power to the third protocol communication module through the LDO unit in the preset standby state.

[0009] In one embodiment, a filtering module is further provided between the power factor correction unit and the first power supply branch, the second power supply branch, and the third power supply branch. The input terminal of the filtering module is connected to the output terminal of the power factor correction unit, the first output terminal of the filtering module is connected to the input terminal of the first resonant power supply module, the second output terminal of the filtering module is connected to the input terminal of the second resonant power supply module, and the third output terminal of the filtering module is connected to the input terminal of the third resonant power supply module.

[0010] In one embodiment, the power supply module further includes an AC power supply and an EMI unit. The output terminal of the AC power supply is connected to the input terminal of the EMI unit, and the output terminal of the EMI unit is connected to the input terminal of the power factor correction unit. The AC power supply is used to provide AC power to the charging control circuit, and the EMI unit is used to filter the AC power output by the AC power supply for electromagnetic interference.

[0011] The present invention has the following beneficial effects: 1. In this embodiment of the invention, by setting up a first power supply branch and a second power supply branch connected to the power supply module, and by having the first protocol communication module detect the working status of the first interface module and the second protocol communication module detect the working status of the second interface module, the main control module can send a power-off control signal to the power supply terminal of the power factor correction unit and the power supply terminal of the second resonant power supply module when both the working status of the first interface module and the second interface module are in a preset standby state. This shuts down the power factor correction unit and stops the second power supply branch from working, thus avoiding the problem of high standby power consumption caused by existing multi-port charging devices keeping the power factor correction unit and multiple power conversion branches working continuously or in a powered-on state in the standby state without external load access.

[0012] 2. In this embodiment of the invention, the first resonant power module supplies power to the first protocol communication module, the second protocol communication module, and the main control module in a preset standby state. This enables the charging control circuit to maintain the detection and control logic of the interface working status even when the power factor correction unit and the second resonant power module are cut off. This achieves hierarchical power supply management based on the interface working status, promptly cutting off unnecessary branch power supply when all interfaces are unloaded, reducing the ineffective loss of the second power supply branch, improving the overall standby energy efficiency, and reducing energy waste.

[0013] 3. In this embodiment of the invention, an LDO unit is added to the first power supply branch, and the second output terminal of the first resonant power supply module supplies power to the first protocol communication module, the second protocol communication module and the main control module through the LDO unit. This enables the protocol detection and control logic to be provided with stable low-voltage power supply in the preset standby state, ensuring that the first protocol communication module and the second protocol communication module continuously detect the working status of the interface.

[0014] 4. In this embodiment of the invention, a first step-down module is provided between the first resonant power supply module and the first protocol communication module, and a second step-down module is provided between the second resonant power supply module and the second protocol communication module. The first protocol communication module shuts off the power supply to the first step-down module in a preset standby state, and the second protocol communication module shuts off the power supply to the second step-down module in a preset standby state. This reduces the no-load loss and conversion loss generated by the step-down module in the preset standby state, further reduces standby power consumption, and avoids energy waste caused by the continuous operation of unnecessary power conversion units during standby. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is one of the circuit structure block diagrams of an embodiment of the present invention; Figure 2 This is a second circuit structure block diagram of an embodiment of the present invention; Figure 3 This is the third circuit structure block diagram of an embodiment of the present invention; Figure 4 This is the fourth circuit structure block diagram of an embodiment of the present invention; Figure 5 This is the fifth circuit structure block diagram of an embodiment of the present invention; Figure 6 This is the sixth circuit structure block diagram of an embodiment of the present invention; Figure 7 This is the seventh circuit structure block diagram of an embodiment of the present invention; Figure 8 This is a schematic diagram of the circuit principle of the power supply module of the present invention; Figure 9 This is a schematic diagram of the circuit principle of the first resonant power supply module of the present invention; Figure 10 This is a schematic diagram of the circuit principle of the second resonant power supply module of the present invention; Figure 11 This is a schematic diagram of the circuit principle of the third resonant power supply module of the present invention; Figure 12 This is a schematic diagram of the circuit principle of the first resonant power supply module, the second resonant power supply module, and the remaining parts of the third resonant power supply module of the present invention. Figure 13 This is a schematic diagram of the circuit principle of the first interface module and the first step-down module of the present invention; Figure 14 This is a schematic diagram of the circuit principle of the first protocol communication module of the present invention; Figure 15 This is a schematic diagram of the circuit principle of an indicator light based on port output voltage in one embodiment of the present invention; Figure 16 This is a schematic diagram of the circuit principle of the main control unit of the present invention; Figure 17 This is a schematic diagram of the circuit principle of the first power supply control unit, the second power supply control unit, and the third power supply control unit of the present invention; Figure 18 This is a schematic diagram of the power supply circuit principle of the second and third resonant power supply modules of the present invention.

[0017] Figure label: 100. Power supply module; 110. AC power supply; 120. EMI unit; 130. Power factor correction unit; 200. Main control module; 210. Main control unit; 220. First power supply control unit; 230. Second power supply control unit; 240. Third power supply control unit; 300, First power supply branch; 310, First resonant power supply module; 320, First protocol communication module; 321, First protocol communication unit; 330, First interface module; 331, First interface unit; 340, LDO unit; 350, First step-down module; 351, First step-down subunit; 360, First filter unit; 400, Second power supply branch; 410, Second resonant power supply module; 420, Second protocol communication module; 421, Second protocol communication unit; 430, Second interface module; 431, Second interface unit; 440, Second step-down module; 441, Second step-down subunit; 450, Second filter unit; 500. Third power supply branch; 510. Third resonant power supply module; 520. Third protocol communication module; 530. Third interface module; 540. Third step-down module; 600. Filtering module. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention. Reference Figure 1 The present invention provides a charging control circuit for a multi-port charging device, comprising: The power supply module 100 includes a power factor correction unit 130, the input terminal of which is connected to AC power. A first power supply branch 300 and a second power supply branch 400 are respectively connected to the power supply module 100. The first power supply branch 300 includes a first resonant power module 310, a first protocol communication module 320, and a first interface module 330. The second power supply branch 400 includes a second resonant power module 410, a second protocol communication module 420, and a second interface module 430. The main control module 200 has its first output terminal connected to the power supply terminal of the second resonant power supply module 410, and its second output terminal connected to the power supply terminal of the power factor correction unit 130. The communication terminals of the main control module 200 are connected to both the first protocol communication module 320 and the second protocol communication module 420. The first protocol communication module 320 is configured to detect the working status of the first interface module 330, and the second protocol communication module 420 is configured to detect the working status of the second interface module 430; when the working status of the first interface module 330 and the second interface module 430 are both in a preset standby state, the main control module 200 sends a power-off control signal to the power supply terminal of the power factor correction unit 130 and the power supply terminal of the second resonant power supply module 410; The first resonant power module 310 is configured to supply power to the first protocol communication module 320, the second protocol communication module 420, and the main control module 200 in the preset standby state.

[0021] In this embodiment, the first protocol communication module 320 and the second protocol communication module 420 respectively detect the working status of the corresponding interface modules and use the detection results as the standby determination basis of the charging control circuit. The first protocol communication module 320 detects the working status of the first interface module 330, and the second protocol communication module 420 detects the working status of the second interface module 430. When the working status of both the first interface module 330 and the second interface module 430 is a preset standby state, it indicates that the multi-port charging device is not in the working state of external power supply or does not need to maintain the continuous operation of the second power supply branch 400, thereby triggering the low-power standby control process.

[0022] It should be noted that in this embodiment, the first protocol communication module 320 detects the working status of the first interface module 330, and the second protocol communication module 420 detects the working status of the second interface module 430. The specific detection method can be implemented using conventional means well-known to those skilled in the art, such as determining the status based on interface status signals, power supply status signals, or protocol interaction status information. This embodiment is not limited to a specific detection method; any method that can determine the working status of the interface module and trigger standby control accordingly is acceptable.

[0023] This embodiment of the invention sets up a first power supply branch 300 and a second power supply branch 400 connected to the power supply module 100. The first protocol communication module 320 detects the working status of the first interface module 330, and the second protocol communication module 420 detects the working status of the second interface module 430. This enables the main control module 200 to send a power-off control signal to the power supply terminal of the power factor correction unit 130 and the power supply terminal of the second resonant power supply module 410 when both the first interface module 330 and the second interface module 430 are in a preset standby state. This shuts down the power factor correction unit 130 and stops the second power supply branch 400 from working, thus avoiding the problem of high standby power consumption caused by existing multi-port charging devices keeping the power factor correction unit 130 and multiple power conversion branches continuously working or in a powered-on state in the standby state without external load access.

[0024] In this embodiment of the invention, the first resonant power module 310 supplies power to the first protocol communication module 320, the second protocol communication module 420, and the main control module 200 in a preset standby state. This enables the charging control circuit to maintain the detection and control logic of the interface working state even when the power factor correction unit 130 and the second resonant power module 410 are cut off. This achieves hierarchical power supply management based on the interface working state, promptly cutting off unnecessary branch power supply when all interfaces are unloaded, reducing the ineffective loss of the second power supply branch 400, improving the overall standby energy efficiency, and reducing energy waste.

[0025] It should also be noted that, Figures 1-7 This is merely an illustrative structural example used to illustrate the main connection relationships between the functional modules of the present invention, and it is not required that all electrical connection lines and auxiliary circuits be drawn one by one. Therefore, in this embodiment, in addition to including the power factor correction unit 130, the power supply module 100 can also be connected via a circuit not included in the power factor correction unit 130. Figures 1-7 It is clearly stated in the document, but Figures 8-18 The auxiliary power supply branch, as clearly shown, is connected to the EMI unit 120. This auxiliary power supply branch is configured to still draw power from the AC side nodes after the EMI unit 120 and / or the output nodes of the filter unit when the power factor correction unit 130 is turned off by the power-off control signal, and to provide the first resonant power module 310 with the input power required to maintain operation, thereby enabling the first resonant power module 310 to maintain output even when the PFC is off.

[0026] Reference Figure 2 In one embodiment, the first power supply branch 300 further includes an LDO unit 340. The input terminal of the first resonant power module 310 is connected to the first output terminal of the power factor correction unit 130. The first output terminal of the first resonant power module 310 is connected to the first protocol communication module 320. The input terminal of the LDO unit 340 is connected to the second output terminal of the first resonant power module 310. The output terminal of the LDO unit 340 is connected to the first protocol communication module 320, the second protocol communication module 420, and the main control module 200. The output terminal of the first protocol communication module 320 is connected to the input terminal of the first interface module 330. The input terminal of the second resonant power module 410 is connected to the second output terminal of the power factor correction unit 130, the output terminal of the second resonant power module 410 is connected to the second protocol communication module 420, and the output terminal of the second protocol communication module 420 is connected to the input terminal of the second interface module 430. The first resonant power module 310 is configured to supply power to the first protocol communication module 320, the second protocol communication module 420 and the main control module 200 through the LDO unit 340 in the preset standby state.

[0027] Furthermore, referring to Figure 2A first step-down module 350 is provided between the first resonant power module 310 and the first protocol communication module 320, and a second step-down module 440 is provided between the second resonant power module 410 and the second protocol communication module 420. The first protocol communication module 320 is configured to turn off the power supply of the first step-down module 350 in the preset standby state, and the second protocol communication module 420 is configured to turn off the power supply of the second step-down module 440 in the preset standby state. In this embodiment, the input terminal of the first resonant power supply module 310 is connected to the first output terminal of the power factor correction unit 130. When the power factor correction unit 130 is working, the first resonant power supply module 310 acquires input power and generates two outputs. The first output terminal directly powers the first protocol communication module 320, and the second output terminal is output after voltage regulation by the LDO unit 340. The output terminal of the LDO unit 340 is simultaneously connected to the first protocol communication module 320, the second protocol communication module 420, and the main control module 200, so that the above modules can still be powered on and running in the preset standby state, thereby maintaining the detection and control logic of the working state of the first interface module 330 and the second interface module 430. At the same time, the input terminal of the second resonant power supply module 410 is connected to the second output terminal of the power factor correction unit 130, and its output terminal powers the second protocol communication module 420. The output terminal of the second protocol communication module 420 is connected to the second interface module 430 to realize the protocol communication and power supply control corresponding to the second interface module 430. In the preset standby state, the first protocol communication module 320 shuts off the power supply to the first step-down module 350, and the second protocol communication module 420 shuts off the power supply to the second step-down module 440, so that the step-down path between the first resonant power supply module 310 and the second resonant power supply module 410 and the corresponding protocol communication module stops working, reducing unnecessary energy loss caused by the step-down module in the standby state. In conjunction with the LDO unit 340 to maintain the power supply to the protocol communication module and the main control module 200, low-power standby operation is achieved.

[0028] In this embodiment of the invention, an LDO unit 340 is added to the first power supply branch 300, and the second output terminal of the first resonant power supply module 310 supplies power to the first protocol communication module 320, the second protocol communication module 420 and the main control module 200 through the LDO unit 340. This enables a stable low-voltage power supply to the protocol detection and control logic in a preset standby state, ensuring that the first protocol communication module 320 and the second protocol communication module 420 continuously detect the working status of the interface.

[0029] In this embodiment of the invention, a first step-down module 350 is provided between the first resonant power module 310 and the first protocol communication module 320, and a second step-down module 440 is provided between the second resonant power module 410 and the second protocol communication module 420. The first protocol communication module 320 shuts off the power supply to the first step-down module 350 in a preset standby state, and the second protocol communication module 420 shuts off the power supply to the second step-down module 440 in a preset standby state. This reduces the no-load loss and conversion loss generated by the step-down module in the preset standby state, further reduces standby power consumption, and avoids energy waste caused by the continuous operation of unnecessary power conversion units during standby.

[0030] It should be noted that the preset standby state can be a state in which both the first interface module 330 and the second interface module 430 are in a state where no external power supply is required. In this state, the corresponding interface does not establish a valid power output or enter a valid charging process. The preset standby state may include, but is not limited to: neither the first interface module 330 nor the second interface module 430 is plugged into an external device; or although there is a physical connection to an external device, charging negotiation is not triggered and no valid output is established; or the interface is in an unloaded output state and the output current is lower than a preset current threshold for a preset time; or the interface is in a low-power maintenance state and there is no change in power request. The specific determination conditions can be set and adjusted by the first protocol communication module 320 and the second protocol communication module 420 according to the interface status information, and the embodiments of the present invention are not limited thereto.

[0031] In one embodiment, the main control module 200 includes a main control unit 210, a first power supply control unit 220, and a second power supply control unit 230. The output terminal of the first power supply control unit 220 is connected to the power supply terminal of the power factor correction unit 130, and the input terminal of the first power supply control unit 220 is connected to the first resonant power supply module 310. The output terminal of the second power supply control unit 230 is connected to the power supply terminal of the second resonant power supply module 410, and the input terminal of the second power supply control unit 230 is connected to the first resonant power supply module 310.

[0032] In one embodiment, reference is made to... Figure 17The first power supply control unit 220 includes an optocoupler U18, diodes ZD6, ZD7, and D16, a switching transistor Q22, resistors R134 and R159. The cathode of diode D16 is connected to the power supply terminal of the power factor correction unit 130, and the anode of diode D16 is connected to the output terminal of the switching transistor Q22. The input terminal of the switching transistor Q22 is connected to the first resonant power supply module 310, one end of resistor R134, and the cathode of diode ZD6. The other end of resistor R134 is connected to the cathode of diode ZD7, the control terminal of the switching transistor Q22, one end of resistor R159, and the positive terminal of the receiving end of optocoupler U18. The other end of resistor R159 is connected to the anode of diode ZD6. The negative terminal of the receiving end of optocoupler U18 is connected to the anode of diode ZD7 and the ground terminal. The positive terminal of the transmitting end of optocoupler U18 is connected to the GPIO output terminal of the main control unit 210, and the negative terminal of the transmitting end of optocoupler U18 is grounded. The second power supply control unit 230 includes an optocoupler U19, diodes ZD8, ZD13, and D11, a switching transistor Q23, and a resistor R135. The cathode of diode D11 is connected to the power supply terminal of the second resonant power module 410, and the anode of diode D11 is connected to the output terminal of the switching transistor Q23. The input terminal of the switching transistor Q23 is connected to the first resonant power module 310 and one end of the resistor R135. The other end of the resistor R135 is connected to the cathode of diode ZD8, the control terminal of the switching transistor Q23, and the cathode of diode ZD13. The anode of diode ZD13 is connected to the positive terminal of the receiving terminal of optocoupler U19, and the negative terminal of the receiving terminal of optocoupler U19 is connected to the anode of diode ZD8 and the ground terminal. The positive terminal of the transmitting terminal of optocoupler U19 is connected to the GPIO output terminal of the main control unit 210, and the negative terminal of the transmitting terminal of optocoupler U19 is grounded.

[0033] In this embodiment, the main control unit 210 is connected to the transmitters of optocouplers U18 and U19 via GPIO output terminals, enabling the main control unit 210 to control the on / off states of the first power supply control unit 220 and the second power supply control unit 230, thereby controlling the power supply states of the power factor correction unit 130 and the second resonant power module 410. When the main control unit 210 needs to make the power factor correction unit 130 work, the main control unit 210 outputs an effective control level to the positive terminal of the transmitter of optocoupler U18 via GPIO output terminals, making optocoupler U18 conduct, thereby changing the potential of the control terminal of switch Q22, making switch Q22 conduct, so that the power of the first resonant power module 310 is transmitted to the power supply terminal of the power factor correction unit 130 through switch Q22 and diode D16. After the power factor correction unit 130 receives power, it enters the working state. Correspondingly, when the main control unit 210 needs to shut down the power factor correction unit 130, the main control unit 210 controls the optocoupler U18 to turn off through the GPIO output terminal, thereby turning off the switching transistor Q22, thus cutting off the power supply path of the power factor correction unit 130 and realizing the power-off control of the power factor correction unit 130; when the main control unit 210 needs to make the second resonant power module 410 work, the main control unit 210 outputs an effective control level to the positive terminal of the transmitter of the optocoupler U19 through the GPIO output terminal, making the optocoupler U19 conduct, thereby changing the potential of the control terminal of the switching transistor Q23, making the switching transistor Q23 conduct, so that the power of the first resonant power module 310 is transmitted to the power supply terminal of the second resonant power module 410 through the switching transistor Q23 and the diode D11, and the second resonant power module 410 enters the working state after receiving power. Correspondingly, when the main control unit 210 needs to shut down the second resonant power module 410, the main control unit 210 controls the optocoupler U19 to turn off through the GPIO output terminal, thereby turning off the switching transistor Q23, thus cutting off the power supply path of the second resonant power module 410 and realizing the power-off control of the second resonant power module 410; when both the first interface module 330 and the second interface module 430 are in the preset standby state, the main control unit 210 outputs the corresponding power-off control signal to the optocoupler U18 and optocoupler U19, so that the power factor correction unit 130 and the second resonant power module 410 stop working, and only the first resonant power module 310 continues to work to supply power to the first protocol communication module 320, the second protocol communication module 420 and the main control module 200, thereby reducing energy loss in the standby state.

[0034] In one embodiment, reference is made to... Figure 16 , Figure 16A schematic diagram of the circuit principle of the main control unit 210 of the present invention is shown. The main control unit 210 is used to establish communication connections with the first protocol communication module 320, the second protocol communication module 420, and the third protocol communication module 520 to obtain the working status information of each interface module, and generate a power-off control signal according to the working status of each interface module. The main control unit 210 is also used to drive the corresponding power supply control unit through the GPIO output terminal to realize the power factor correction unit 130 and each resonant power supply module power supply start and stop control, thereby realizing hierarchical power supply management in standby mode and reducing standby power consumption.

[0035] In one embodiment, reference is made to... Figure 17 , Figure 17 A schematic diagram of the circuit principle of the first power supply control unit 220, the second power supply control unit 230, and the third power supply control unit 240 of the present invention is shown. The first power supply control unit 220 is used to control the power supply start and stop of the power factor correction unit 130, the second power supply control unit 230 is used to control the power supply start and stop of the second resonant power module 410, and the third power supply control unit 240 is used to control the power supply start and stop of the third resonant power module 510. Each power supply control unit is driven by the control signal of the main control unit 210 to cut off the power supply to the corresponding power supply terminal in a preset standby state, thereby stopping the corresponding power supply branch from working; and when an external device is detected to be connected and needs power, the power supply to the corresponding power supply terminal is restored, so that the corresponding power supply branch enters the working state.

[0036] Specifically, the first power supply control unit 220 includes an optocoupler U18, diodes ZD6, ZD7, and D16, a switching transistor Q22, resistors R134 and R159. The cathode of diode D16 is connected to the power supply terminal of the power factor correction unit 130, and the anode of diode D16 is connected to the output terminal of the switching transistor Q22. The input terminal of the switching transistor Q22 is connected to the first resonant power supply module 310, one end of resistor R134, and the cathode of diode ZD6. The other end of resistor R134 is connected to the cathode of diode ZD7, the control terminal of the switching transistor Q22, one end of resistor R159, and the positive terminal of the receiving end of optocoupler U18. The other end of resistor R159 is connected to the anode of diode ZD6. The negative terminal of the receiving end of optocoupler U18 is connected to the anode of diode ZD7 and the ground terminal. The positive terminal of the transmitting end of optocoupler U18 is connected to the GPIO output terminal of the main control unit 210, and the negative terminal of the transmitting end of optocoupler U18 is grounded.

[0037] Specifically, the second power supply control unit 230 includes an optocoupler U19, diodes ZD8, ZD13, and D11, a switching transistor Q23, and a resistor R135. The cathode of diode D11 is connected to the power supply terminal of the second resonant power module 410, and the anode of diode D11 is connected to the output terminal of the switching transistor Q23. The input terminal of the switching transistor Q23 is connected to the first resonant power module 310 and one end of the resistor R135. The other end of the resistor R135 is connected to the cathode of diode ZD8, the control terminal of the switching transistor Q23, and the cathode of diode ZD13. The anode of diode ZD13 is connected to the positive terminal of the receiving terminal of optocoupler U19, and the negative terminal of the receiving terminal of optocoupler U19 is connected to the anode of diode ZD8 and the ground terminal. The positive terminal of the transmitting terminal of optocoupler U19 is connected to the GPIO output terminal of the main control unit 210, and the negative terminal of the transmitting terminal of optocoupler U19 is grounded.

[0038] It should be noted that the circuit structure of the third power supply control unit 240 is the same as or similar to that of the second power supply control unit 230. Both include optocouplers, diodes, switching transistors, and resistors, and both are driven by the GPIO output of the main control unit 210 to control the start and stop of the power supply to the corresponding resonant power module. The difference is that the controlled object of the third power supply control unit 240 is the third resonant power module 510, and the connection nodes between its input and output terminals are different from those of the second resonant power module 410 in the second power supply control unit 230. The third power supply control unit 240 mainly realizes independent power-off control and on-demand power restoration control of the third power supply branch 500.

[0039] In one embodiment, reference is made to... Figure 14 , Figure 14A schematic diagram of the circuit principle of the first protocol communication module 320 of the present invention is shown. The first protocol communication module 320 is used to communicate with external devices via charging protocols and to detect the working status of the first interface module 330 to provide interface status information to the main control module 200. The first protocol communication module 320 is also communicatively connected to the main control module 200 to receive control commands from the main control module 200 and execute corresponding protocol management and output control. When the first interface module 330 is detected to be in a preset standby state, the first protocol communication module 320 sends the corresponding standby status information to the main control module 200, so that the main control module 200 decides whether to power down the power factor correction unit 130 and the second resonant power supply module 410 based on the working status of multiple interface modules; and, in the preset standby state, the first resonant power supply module 310 can continuously supply power to the first protocol communication module 320, enabling it to maintain its status detection capability of the first interface module 330, thereby achieving low-power operation and fast wake-up in the standby state.

[0040] It should be noted that the circuit structure and working principle of the second protocol communication module 420 and the third protocol communication module 520 are the same as or similar to those of the first protocol communication module 320. They are all used to communicate with external devices on the charging protocol, detect the working status of the corresponding interface module and provide status information to the main control module 200, so as to cooperate with the main control module 200 to realize the on-demand start and stop control of the corresponding power supply branch. This embodiment of the invention does not limit the scope of the invention.

[0041] In one embodiment, reference is made to... Figures 3-4 The first power supply branch 300 further includes a first filter unit 360, the first step-down module 350 includes multiple first step-down sub-units 351, the first protocol communication module 320 includes multiple first protocol communication units 321, the first interface module 330 includes multiple first interface units 331, the input terminal of the first filter unit 360 is connected to the output terminal of the first resonant power supply module 310, and the output terminal of the first filter unit 360 is connected to each of the first step-down sub-units 351 and the LDO unit 340; at least one first step-down sub-unit 351, at least one first protocol communication unit 321, and at least one first interface unit 331 constitute the first power supply branch. In this embodiment, by dividing the first power supply branch 300 into multiple first power supply branches, independent power supply and management of the interfaces are realized, which facilitates on-demand start-up and shutdown and reduces no-load loss, thereby improving the energy efficiency and standby performance of multi-port charging.

[0042] In one implementation, reference is made to Figure 3The first power supply branch can be composed of at least one first step-down subunit 351, at least one first protocol communication unit 321, and at least one first interface unit 331. The first step-down subunit 351 provides power support to the corresponding first protocol communication unit 321 and first interface unit 331. The first protocol communication unit 321 performs protocol communication and status management with the corresponding first interface unit 331, thereby realizing independent power supply and independent control of the interface. This embodiment of the invention does not limit the above units to a one-to-one correspondence; in practical applications, they can be combined and configured according to the number of interfaces, output specifications, or structural layout.

[0043] In one implementation, reference is made to Figure 4 A first protocol communication unit 321 can be connected to at least two first interface units 331 and cooperate with at least two first step-down subunits 351 to form a first power supply branch, thereby realizing unified protocol communication and control management of multiple interface units by the same protocol communication unit. Through the above configuration, the number of protocol communication units can be reduced and control complexity lowered, while still maintaining the power output capability of multiple interface units. This embodiment of the invention does not... Figure 2 The connection relationships shown are limited, and the corresponding quantity relationships between the first protocol communication unit 321, the first interface unit 331, and the first step-down subunit 351 can be flexibly adjusted according to actual needs.

[0044] Reference Figure 6 In one embodiment, the overall structure of the second power supply branch 400 is the same as or similar to that of the first power supply branch 300. The second power supply branch 400 also includes a resonant power module for power output, a protocol communication module for status detection and protocol management, and an interface module for external connection, and can form multiple power supply branches to achieve multi-port output. The difference is that the second power supply branch 400 does not have an LDO unit 340, and the power supply for the second resonant power module 410 comes from the first resonant power module 310, allowing the second power supply branch 400 to start or stop working as needed while the first power supply branch 300 remains operational. In a preset standby state, the main control module 200 controls the second power supply branch 400 to shut down, thereby reducing ineffective energy loss in standby mode and cooperating with the first power supply branch 300 to achieve low-power standby operation.

[0045] Similarly, the second protocol communication module 420 may also include multiple second protocol communication units 421. Each second protocol communication unit 421 is used to detect the working status of the corresponding second interface unit 431 and perform protocol negotiation, while reporting the interface status information to the main control module 200 to cooperate with the main control module 200 to realize the on-demand start and stop control of the second power supply branch 400; the second step-down module 440 may also include multiple second step-down sub-units 441. Each second step-down sub-unit 441 is used to step down the output of the second resonant power supply module 410. The power supply is converted and the required power output is provided to the corresponding second protocol communication unit 421 and / or second interface unit 431 to realize multi-port independent power supply management of the second power supply branch 400; the second power supply branch 400 may also include a second filter unit 450, the input terminal of the second filter unit 450 is connected to the output terminal of the second resonant power module 410, and the output terminal of the second filter unit 450 is connected to each second step-down subunit 441, which is used to filter and smooth the output of the second resonant power module 410 to improve the stability of the subsequent power supply and reduce ripple interference.

[0046] In one embodiment, reference is made to... Figure 5It also includes a third power supply branch 500, which includes a third resonant power module 510, a third protocol communication module 520, a third interface module 530, and a third step-down module 540. The input terminal of the third resonant power module 510 is connected to the third output terminal of the power factor correction unit 130, the output terminal of the third resonant power module 510 is connected to the input terminal of the third step-down module 540, the output terminal of the third step-down module 540 is connected to the third protocol communication module 520, the output terminal of the third protocol communication module 520 is connected to the input terminal of the third interface module 530, the power supply terminal of the third protocol communication module 520 is connected to the output terminal of the LDO unit 340, and the communication terminal of the main control module 200 is connected to the third protocol communication module 520; the third protocol communication module 520... The system is configured to detect the operating status of the third interface module 530. When the operating status of the first interface module 330, the second interface module 430, and the third interface module 530 are all in a preset standby state, the main control module 200 sends a power-off control signal to the power supply terminal of the third resonant power module 510. The third protocol communication module 520 is configured to shut down the power supply to the third step-down module 540 in the preset standby state. The first resonant power module 310 is configured to supply power to the third protocol communication module 520 through the LDO unit 340 in the preset standby state. By adding a third power supply branch 500, the multi-port charging device can support more interface outputs while still achieving hierarchical power supply management based on the detection results of the operating status of the third interface module 530 by the third protocol communication module 520. When the first interface module 330, the second interface module 430, and the third interface module 530 are all in a preset standby state, the main control module 200 controls the third resonant power supply module 510 to power off, and the third protocol communication module 520 shuts off the power supply to the third step-down module 540, thereby reducing the ineffective losses of the third power supply branch 500 in the standby state; at the same time, the first resonant power supply module 310 supplies power to the third protocol communication module 520 through the LDO unit 340 in the preset standby state, so that the third interface module 530 can still maintain the status detection and wake-up capability, realizing low-power standby.

[0047] It should be noted that the third power supply branch 500 is an example configuration. In other embodiments, the charging control circuit may further include a fourth power supply branch, a fifth power supply branch, and other power supply branches. The structure, connection method, and control logic of each power supply branch may be the same as or similar to the second power supply branch 400 or the third power supply branch 500. The corresponding protocol communication module can detect the working status of the corresponding interface module, so that the main control module 200 can perform on-demand power supply control on the corresponding resonant power supply module and step-down module. The embodiments of the present invention do not limit the number of power supply branches and the number of interfaces, and can be expanded according to actual power requirements and interface configurations.

[0048] In a preferred embodiment, the charging control circuit for a multi-port charging device of the present invention can be applied to a 240W, 12-port Type-C charging device.

[0049] Reference Figures 9-12 The first resonant power module 310, the second resonant power module 410, and the third resonant power module 510 are respectively used to convert the input DC power into output power that meets the power supply requirements of the subsequent stage, so as to provide power support for the protocol communication module and interface module in the corresponding power supply branch. Each resonant power module can be started and stopped according to the working status of the corresponding power supply branch, so that the corresponding power supply branch enters the working state and outputs power when it needs to supply power to the outside, and stops supplying power to the corresponding power supply branch when the preset standby state is met, thereby reducing the ineffective energy loss in the standby state. The first resonant power module 310 continues to work in the preset standby state to provide power support to the main control module 200 and the protocol communication module, so that the charging control circuit can still maintain the interface status detection and control logic operation in the low power standby state.

[0050] It should be noted that, Figures 9-12 The circuit shown is an example implementation. The specific circuit form, component selection and parameter settings of the resonant power supply module can be adjusted according to the actual product power requirements and interface configuration. This embodiment of the invention is not limited.

[0051] In one embodiment, reference is made to... Figure 13 , Figure 13A circuit diagram of the first interface module 330 and the first step-down module 350 of the present invention is shown. The first step-down module 350 is used to convert the electrical energy output from the first resonant power supply module 310 into electrical energy adapted to the output requirements of the first interface module 330, and to provide corresponding power output to the first interface module 330 to realize charging power supply for external devices. The first interface module 330 is used to establish an electrical connection with external devices and output electrical energy, and can manage the output voltage and output status under the control of the first protocol communication module 320; the first protocol communication module 320 can detect the working status of the first interface module 330 and shut down the power supply of the first step-down module 350 in a preset standby state, thereby stopping the first step-down module 350 from working to reduce standby power loss; when the first interface module 330 detects that an external device is connected and needs power, the first protocol communication module 320 controls the first step-down module 350 to resume working, so that the first interface module 330 enters the normal output state. It should be noted that... Figure 13 The circuit shown is an example implementation. The specific circuit structure and parameter settings of the first interface module 330 and the first step-down module 350 can be adjusted according to the actual number of interfaces and output specifications. This embodiment of the invention does not limit the specific implementation.

[0052] It should be noted that, Figure 13 Only an example circuit implementation of the first interface module 330 and the first step-down module 350 is shown. In other embodiments, the second interface module 430 and the second step-down module 440, the third interface module 530 and the third step-down module 540, etc., can also adopt the same... Figure 13 The embodiments of the present invention are not limited to implementing the same or similar circuit structure and control logic to achieve on-demand power supply and standby shutdown control under the management of the corresponding protocol communication module.

[0053] In one embodiment, reference is made to... Figure 7 A filter module 600 is also provided between the power factor correction unit 130 and the first power supply branch 300, the second power supply branch 400, and the third power supply branch 500. The input terminal of the filter module 600 is connected to the output terminal of the power factor correction unit 130, the first output terminal of the filter module 600 is connected to the input terminal of the first resonant power supply module 310, the second output terminal of the filter module 600 is connected to the input terminal of the second resonant power supply module 410, and the third output terminal of the filter module 600 is connected to the input terminal of the third resonant power supply module 510. This achieves filtering and stable distribution of the output power, reduces ripple interference, and improves the power supply reliability of each resonant power supply module and the overall operating stability of the machine. In one embodiment, reference is made to... Figure 7The power supply module 100 further includes an AC power supply 110 and an EMI unit 120. The output terminal of the AC power supply 110 is connected to the input terminal of the EMI unit 120, and the output terminal of the EMI unit 120 is connected to the input terminal of the power factor correction unit 130. The AC power supply 110 is used to provide AC power to the charging control circuit, and the EMI unit 120 is used to perform electromagnetic interference filtering on the AC power output by the AC power supply 110. Performing electromagnetic interference filtering on the AC power reduces conducted interference and improves electromagnetic compatibility performance, thereby improving the stability of the power factor correction unit 130 and the overall power supply.

[0054] Furthermore, referring to Figure 8 , Figure 8 A schematic diagram of the power supply module 100 of the present invention is shown. The power supply module 100 includes an AC power supply 110, an EMI unit 120, and a power factor correction unit 130 connected in sequence. The EMI unit 120 is used to perform electromagnetic interference filtering on the input power of the AC power supply 110 to suppress conducted interference, improve electromagnetic compatibility performance, and smooth the signal to form a DC bus voltage. The power factor correction unit 130 is used to perform power factor correction control on the DC bus voltage and output stable DC power to provide input power for the subsequent first power supply branch 300, second power supply branch 400, and third power supply branch 500, thereby meeting the power supply requirements of multiple power supply branches.

[0055] In one embodiment, reference is made to Figure 18 , Figure 18 A schematic diagram of the power supply circuit principle of the second resonant power module 410 and the third resonant power module 510 of the present invention is shown. The power supply circuit is used to control the input power supply path of the second resonant power module 410 and the third resonant power module 510, so that they can selectively obtain power and enter the working state under the control of the main control module 200. When an external device is detected to be connected to the corresponding interface module and needs power, the main control module 200 controls the corresponding power supply control unit to restore the power supply to the second resonant power module 410 and / or the third resonant power module 510, so that the second power supply branch 400 and / or the third power supply branch 500 enter the working state; when the working state of the first interface module 330, the second interface module 430 and the third interface module 530 are all in the preset standby state, the main control module 200 controls to cut off the power supply to the second resonant power module 410 and the third resonant power module 510, thereby reducing the ineffective loss in the standby state and improving the standby energy efficiency of the whole machine.

[0056] In one embodiment, reference is made to... Figure 15 , Figure 15The diagram illustrates the circuit principle of an indicator light based on port output voltage according to an embodiment of the present invention. The indicator light circuit drives the indicator light to light up or turn off based on the output voltage status of the interface module, providing a visual indication of the port's power supply status. When the corresponding port has output voltage, the indicator light circuit controls the indicator light to be on; when the corresponding port has no output voltage or is in a preset standby state, the indicator light circuit controls the indicator light to be off, thereby facilitating users to intuitively judge the working status of each port and improving the ease of use of multi-port charging devices.

[0057] It should be noted that, Figure 15 The indicator light circuit shown is an example implementation. Its specific circuit structure can be adjusted according to actual product requirements. This embodiment of the invention is not limited to this.

[0058] The working principle of this invention is as follows: Reference Figures 8-18 When in normal standby mode and no external device is detected, the bus output of the first resonant power module 310 can be maintained at a preset voltage (e.g., 8V) to provide basic power to the protocol communication unit U8 and the main control unit 210, thereby ensuring that the device has continuous port detection capability and fast wake-up capability. In this standby mode, the main control unit 210 outputs a power-off control signal through optocoupler U19 and / or optocoupler U20 to turn off MOSFETs Q23 and Q24, thereby cutting off the power supply path of the second resonant power module 410 and the third resonant power module 510, and stopping QR2 and QR3 from working, so as to reduce standby power consumption. At the same time, the main control unit 210 outputs a power-off control signal through optocoupler U18 to turn off MOSFET Q22, thereby cutting off the power supply terminal of the power factor correction unit 130, stopping the PFC from working, and further reducing standby power consumption. In addition, in the lowest standby state, the control pins (e.g., PIN20, PIN21) of each protocol communication unit U8 output a low-level signal to turn off the corresponding buck units Buck U7 and Buck U6, thereby avoiding the no-load loss caused by the buck units working continuously under no-load conditions.

[0059] Therefore, in the lowest standby state, only the first resonant power module 310, the protocol communication unit U8, and the main control unit 210 remain operational, while the remaining power supply branches and the power factor correction unit 130 are shut down, allowing the entire device to enter a low-power standby mode. Through this hierarchical power supply control mechanism, the standby power consumption of the entire device can be reduced to a preset threshold (e.g., 0.18W), thereby meeting the ERP6 standby energy efficiency requirements.

[0060] When the interface port corresponding to the first resonant power module 310 detects the insertion of an external device, the protocol communication unit U8 corresponding to the port switches its PIN20 and PIN21 from low level to high level to start the corresponding buck unit BuckU7 and / or BuckU6, so that the port enters the normal output working state and supplies power to the external device, realizing on-demand wake-up and load-bearing operation.

[0061] When the interface port corresponding to the second resonant power module 410 or the third resonant power module 510 detects the insertion of an external device, the corresponding protocol communication unit U8 will also output high-level signals through PIN20 and PIN21 to start the corresponding buck unit Buck U7 and / or Buck U6. At the same time, the corresponding protocol communication unit U8 also sends a wake-up command or status information to the main control unit 210. Based on this, the main control unit 210 controls the MOS transistors Q23 and Q24 to conduct through optocoupler U19 and / or optocoupler U20, restoring the power supply to the second resonant power module 410 and / or the third resonant power module 510, so that the corresponding resonant power module starts working, thereby enabling the corresponding power supply branch to enter the normal working state and supply power to the external load.

[0062] During interface operation, when the port normally outputs 5V and the resonant bus output is at a preset voltage (e.g., 8V), if an external device requests an output voltage higher than the bus voltage (e.g., a request for 9V output), the protocol communication unit U8 can send a voltage adjustment request to the main control unit 210 via SDA and SCL. After receiving the request, the main control unit 210 can adjust the voltage regulation control unit (e.g., the QR431 feedback circuit, corresponding to devices U3, U15, U11, etc.) through a feedback control circuit (e.g., a control path composed of devices such as Q6, Q7; Q13, Q14; Q19, Q20, etc.), thereby making the port output voltage close to the resonant bus input voltage, thus improving the power supply efficiency and load-carrying performance in high-voltage output scenarios.

[0063] During interface power supply, the protocol communication unit U8 continuously monitors the port output power and feeds back the current total output power status to the main control unit 210. When the total output power of the device exceeds a preset threshold (e.g., 65W), the main control unit 210 controls the MOSFET Q22 to conduct via the optocoupler U18, enabling the power factor correction unit 130 to start working, in order to meet the harmonic and power factor requirements under high power operation. When the total output power of the device is lower than the preset threshold, the main control unit 210 can again control the MOSFET Q22 to turn off via the optocoupler U18, causing the PFC to stop working, thereby reducing energy loss under low power or light load conditions, thus balancing harmonic compliance and overall energy efficiency.

[0064] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A charging control circuit for a multi-port charging device, characterized in that, include: A power supply module (100) includes a power factor correction unit (130), the input of which is connected to AC power. A first power supply branch (300) and a second power supply branch (400) are respectively connected to the power supply module (100). The first power supply branch (300) includes a first resonant power supply module (310), a first protocol communication module (320) and a first interface module (330). The second power supply branch (400) includes a second resonant power supply module (410), a second protocol communication module (420) and a second interface module (430). The main control module (200) has its first output terminal connected to the power supply terminal of the second resonant power supply module (410), and its second output terminal connected to the power supply terminal of the power factor correction unit (130). The communication terminal of the main control module (200) is connected to the first protocol communication module (320) and the second protocol communication module (420) respectively. The first protocol communication module (320) is configured to detect the working status of the first interface module (330), and the second protocol communication module (420) is configured to detect the working status of the second interface module (430); when the working status of the first interface module (330) and the second interface module (430) are both in a preset standby state, the main control module (200) sends a power-off control signal to the power supply terminal of the power factor correction unit (130) and the power supply terminal of the second resonant power supply module (410); The first resonant power supply module (310) is configured to supply power to the first protocol communication module (320), the second protocol communication module (420) and the main control module (200) in the preset standby state.

2. The charging control circuit for a multi-port charging device according to claim 1, characterized in that, The first power supply branch (300) also includes an LDO unit (340). The input terminal of the first resonant power module (310) is connected to the first output terminal of the power factor correction unit (130). The first output terminal of the first resonant power module (310) is connected to the first protocol communication module (320). The input terminal of the LDO unit (340) is connected to the second output terminal of the first resonant power module (310). The output terminal of the LDO unit (340) is connected to the first protocol communication module (320), the second protocol communication module (420), and the main control module (200). The output terminal of the first protocol communication module (320) is connected to the input terminal of the first interface module (330). The input terminal of the second resonant power module (410) is connected to the second output terminal of the power factor correction unit (130), the output terminal of the second resonant power module (410) is connected to the second protocol communication module (420), and the output terminal of the second protocol communication module (420) is connected to the input terminal of the second interface module (430). The first resonant power module (310) is configured to supply power to the first protocol communication module (320), the second protocol communication module (420) and the main control module (200) through the LDO unit (340) in the preset standby state.

3. The charging control circuit for a multi-port charging device according to claim 2, characterized in that, A first step-down module (350) is provided between the first resonant power supply module (310) and the first protocol communication module (320), and a second step-down module (440) is provided between the second resonant power supply module (410) and the second protocol communication module (420). The first protocol communication module (320) is configured to turn off the power supply of the first step-down module (350) in the preset standby state, and the second protocol communication module (420) is configured to turn off the power supply of the second step-down module (440) in the preset standby state.

4. The charging control circuit for a multi-port charging device according to claim 3, characterized in that, The main control module (200) includes a main control unit (210), a first power supply control unit (220) and a second power supply control unit (230). The output terminal of the first power supply control unit (220) is connected to the power supply terminal of the power factor correction unit (130). The input terminal of the first power supply control unit (220) is connected to the first resonant power module (310). The output terminal of the second power supply control unit (230) is connected to the power supply terminal of the second resonant power module (410). The input terminal of the second power supply control unit (230) is connected to the first resonant power module (310).

5. The charging control circuit for a multi-port charging device according to claim 4, characterized in that, The first power supply control unit (220) includes an optocoupler U18, diodes ZD6 and ZD7, diode D16, a switching transistor Q22, resistors R134 and R159. The cathode of diode D16 is connected to the power supply terminal of the power factor correction unit (130), and the anode of diode D16 is connected to the output terminal of the switching transistor Q22. The input terminal of the switching transistor Q22 is connected to the first resonant power supply module (310), one end of resistor R134, and the input terminal of diode ZD6. The cathode is connected to the cathode of the diode ZD7, the control terminal of the switch Q22, one end of the resistor R159, and the positive terminal of the receiver of the optocoupler U18. The other end of the resistor R159 is connected to the anode of the diode ZD6. The negative terminal of the receiver of the optocoupler U18 is connected to the anode of the diode ZD7 and the ground terminal. The positive terminal of the transmitter of the optocoupler U18 is connected to the GPIO output terminal of the main control unit (210), and the negative terminal of the transmitter of the optocoupler U18 is grounded.

6. The charging control circuit for a multi-port charging device according to claim 5, characterized in that, The second power supply control unit (230) includes an optocoupler U19, diodes ZD8, ZD13, D11, a switching transistor Q23, and a resistor R135. The cathode of diode D11 is connected to the power supply terminal of the second resonant power module (410), the anode of diode D11 is connected to the output terminal of the switching transistor Q23, the input terminal of the switching transistor Q23 is connected to the first resonant power module (310) and one end of the resistor R135, the other end of the resistor R135 is connected to the cathode of diode ZD8, the control terminal of the switching transistor Q23, and the cathode of diode ZD13, the anode of diode ZD13 is connected to the positive terminal of the receiving terminal of optocoupler U19, the negative terminal of the receiving terminal of optocoupler U19 is connected to the anode of diode ZD8 and the ground terminal, the positive terminal of the transmitting terminal of optocoupler U19 is connected to the GPIO output terminal of the main control unit (210), and the negative terminal of the transmitting terminal of optocoupler U19 is grounded.

7. The charging control circuit for a multi-port charging device according to claim 3, characterized in that, The first power supply branch (300) further includes a first filter unit (360), the first step-down module (350) includes multiple first step-down sub-units (351), the first protocol communication module (320) includes multiple first protocol communication units (321), the first interface module (330) includes multiple first interface units (331), the input terminal of the first filter unit (360) is connected to the output terminal of the first resonant power supply module (310), and the output terminal of the first filter unit (360) is connected to each of the first step-down sub-units (351) and the LDO unit (340); wherein, At least one of the first step-down subunits (351), at least one of the first protocol communication units (321), and at least one of the first interface units (331) constitute the first power supply branch.

8. The charging control circuit for a multi-port charging device according to claim 3, characterized in that, It also includes a third power supply branch (500), which includes a third resonant power module (510), a third protocol communication module (520), a third interface module (530), and a third step-down module (540). The input terminal of the third resonant power module (510) is connected to the third output terminal of the power factor correction unit (130), the output terminal of the third resonant power module (510) is connected to the input terminal of the third step-down module (540), the output terminal of the third step-down module (540) is connected to the third protocol communication module (520), the output terminal of the third protocol communication module (520) is connected to the input terminal of the third interface module (530), the power supply terminal of the third protocol communication module (520) is connected to the output terminal of the LDO unit (340), and the communication terminal of the main control module (200) is connected to the third protocol communication module (520). The third protocol communication module (520) is configured to detect the working status of the third interface module (530). When the working status of the first interface module (330), the second interface module (430) and the third interface module (530) are all in a preset standby state, the main control module (200) sends a power-off control signal to the power supply terminal of the third resonant power module (510). The third protocol communication module (520) is configured to turn off the power supply to the third step-down module (540) in the preset standby state; The first resonant power module (310) is configured to supply power to the third protocol communication module (520) through the LDO unit (340) in the preset standby state.

9. The charging control circuit for a multi-port charging device according to claim 8, characterized in that, A filter module (600) is also provided between the power factor correction unit (130) and the first power supply branch (300), the second power supply branch (400) and the third power supply branch (500). The input terminal of the filter module (600) is connected to the output terminal of the power factor correction unit (130), the first output terminal of the filter module (600) is connected to the input terminal of the first resonant power supply module (310), the second output terminal of the filter module (600) is connected to the input terminal of the second resonant power supply module (410), and the third output terminal of the filter module (600) is connected to the input terminal of the third resonant power supply module (510).

10. The charging control circuit for a multi-port charging device according to claim 1, characterized in that, The power supply module (100) further includes an AC power supply (110) and an EMI unit (120). The output terminal of the AC power supply (110) is connected to the input terminal of the EMI unit (120), and the output terminal of the EMI unit (120) is connected to the input terminal of the power factor correction unit (130). The AC power supply (110) is used to provide AC power to the charging control circuit, and the EMI unit (120) is used to perform electromagnetic interference filtering on the AC power output by the AC power supply (110).

Images