Multi-port output control circuit, power supply circuit and charging apparatus

Abstract

The present application provides a multi-port output control circuit, a power supply circuit and a charging apparatus. The multi-port output control circuit comprises N output control modules, M transformer modules and a controller, each output control module comprises an output port configured to be connected to an external device, and N≥2; each transformer module is connected to at least two output control modules, wherein 1≤M<N; the controller is connected to each output control module and is configured to control the on-off of the output control module; and when at most M external devices are connected to one output port at the same time, the charging apparatus can supply power to each external device.

Description

Multi-port output control circuit, power supply circuit, and charging device

[0001] This application claims priority to Chinese Patent Application No. CN202421785436.1, filed on July 25, 2024, entitled "Multi-port Output Control Circuit, Power Supply Circuit and Charging Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of charging devices, and more specifically, to a multi-port output control circuit, a power supply circuit, and a charging device. Background Technology

[0003] Nowadays, there are more and more smart devices that need to be charged in our daily lives. Smart devices such as smartphones, laptops, and tablets, as well as power tools, cordless vacuum cleaners, and car vacuum cleaners that support mainstream fast charging protocols, all need to be charged quickly. Therefore, multi-port charging devices have been developed based on the technology of traditional single-port charging devices.

[0004] In related technologies, in order to use a multi-port charging device to fast charge external devices, it is often necessary to connect to the corresponding fast charging interface. However, multi-port charging devices have a large number of interfaces, making it difficult for users to find the corresponding fast charging interface to charge external devices, which causes inconvenience to users. Summary of the Invention

[0005] This application provides a multi-port output control circuit, a power supply circuit, and a charging device. When the number of external devices that a user needs to charge is up to the same as the number of transformer modules, the external devices can be connected to any output port and the charging device can quickly charge the external devices without having to select the corresponding output port according to the instruction manual or label, thereby improving the user's convenience.

[0006] This application provides a multi-port output control circuit applicable to power supply circuits. The multi-port output control circuit includes N output control modules, M transformer modules, and a controller. Each output control module includes an output port configured to connect to an external device, where N ≥ 2. Each transformer module is connected to at least two output control modules, where 1 ≤ M < N. The controller is connected to each output control module and configured to control the on / off state of the output control modules. When at most M output ports are connected to external devices, the controller controls the output control module corresponding to the output port connected to the external device to be turned on, so that the transformer module can supply power to the external device in fast charging mode through the output control module.

[0007] Based on the above embodiments, when up to M external devices are simultaneously connected to M output ports, the charging device can fast charge each external device to improve the charging efficiency of each external device. Furthermore, when the number of external devices requiring charging is at most M, connecting the external devices to any output port allows for fast charging via the charging device, eliminating the need to select the corresponding output port according to the instruction manual or labels, thereby improving user convenience.

[0008] This application embodiment also provides a power supply circuit, including a rectifier module, a multi-port output control circuit, and a protocol chip. The rectifier module has an AC input terminal and a DC output terminal. The AC input terminal of the rectifier module is configured to be connected to the mains power. The input terminal of the transformer module is connected to the DC output terminal of the rectifier module. The protocol chip is connected to the transformer module and the output port.

[0009] This application also provides a charging device, including a housing, a circuit board, and a power supply circuit. The housing has an AC power interface; the circuit board is disposed inside the housing; the power supply circuit is disposed on the circuit board, the AC input terminal of the rectifier module is connected to the AC power interface, and the output port is disposed in the housing and exposed.

[0010] Based on the multi-port output control circuit of this application, when up to M output ports are connected to external devices, the controller controls the output control module corresponding to the output port of the connected external device to be turned on, so that the transformer module can supply power to the external device in fast charging mode through the output control module. This allows the charging device to fast charge each external device when up to M external devices are connected to M output ports simultaneously, thereby improving the charging efficiency of each external device. Furthermore, when the number of external devices that the user needs to charge is up to M, connecting the external devices to any output port will allow the charging device to fast charge the external devices, eliminating the need for the user to select the corresponding output port according to the instruction manual or labels, thus improving the user's convenience. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 is a schematic diagram of the structure of a charging device in one embodiment of this application;

[0013] Figure 2 is a schematic diagram of the frame structure of the power supply circuit in one embodiment of this application;

[0014] Figure 3 is a schematic diagram of the structure of a multi-port output control circuit in one embodiment of this application;

[0015] Figure 4 is a schematic diagram of the structure of a multi-port output control circuit in another embodiment of this application.

[0016] Explanation of reference numerals in the attached drawings: 1. Charging device; 11. Housing; 12. Circuit board; 2. Power supply circuit; 21. Rectifier module; 22. Protocol chip; 3. Multi-port output control circuit; 31. Output control module; 31A. Output port; 311. Control sub-circuit; 3111. First switching circuit; 3112. Second switching circuit; 32. Transformer module; 33. Controller; Q1. First switching element; Q2. Second switching element; Q3. Third switching element; R1. First resistor; R2. Second resistor; R3. Third resistor; D1. First diode; D2. Second diode. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0018] Referring to Figure 1, this application embodiment provides a charging device 1, including a housing 11, a circuit board 12, and a power supply circuit 2.

[0019] The housing 11 supports and protects the electronic components housed within it. The housing 11 can be made of plastic or metal; specifically, it can be made of plastic to provide insulation, reducing the risk of electric shock to the user. Furthermore, the lightweight nature of plastic contributes to the overall lightness of the charging device 1, making it easier for the user to carry and use. Specifically, the housing 11 can be integrally injection molded to achieve high structural strength, making it less prone to damage and protecting other components within it, thus reducing the probability of damage to these components and extending the lifespan of the charging device 1.

[0020] The housing 11 also has an AC power interface (not shown in the figure) for connecting to AC power.

[0021] The power supply circuit 2 can be formed on the circuit board 12 by etching process, which can improve the manufacturing efficiency of the power supply circuit 2 and reduce the manufacturing cost of the power supply circuit 2.

[0022] It is understood that the charging device 1 can be a power bank or a charger, and the specific form of the charging device 1 is not limited in this application.

[0023] Please refer to Figure 2. The power supply circuit 2 may include a rectifier module 21, a multi-port output control circuit 3, and a protocol chip 22.

[0024] The rectifier module 21 has an AC input terminal and a DC output terminal. The AC input terminal of the rectifier module 21 can be connected to the mains interface of the housing 11, and the DC output terminal of the rectifier module 21 is connected to the multi-port output control circuit 3.

[0025] For example, the rectifier module 21 may include a rectifier circuit (not shown in the figure), a filter circuit (not shown in the figure), and a voltage regulator circuit (not shown in the figure). The rectifier circuit is used to rectify AC power into DC power, and the rectifier circuit includes, but is not limited to, a bridge rectifier circuit and a PWM (pulse width modulation) rectifier circuit. The filter circuit is used to filter the pulsating DC power output by the rectifier circuit to make the waveform of the output DC power smooth. The voltage regulator circuit is used to maintain a constant output voltage. In this embodiment, the specific form of the rectifier module 21 is not limited.

[0026] Please refer to Figure 2. In one embodiment of this application, the multi-port output control circuit 3 includes an output control module 31, a transformer module 32, and a controller 33.

[0027] The output control module 31 includes an output port 31A for connecting to an external device. The output port 31A is connected to and exposed through the housing 11 to facilitate connection between the external device and the output port 31A. The charging device 1 can be connected to AC power and supply power to the external device via the output port 31A. The external device includes, but is not limited to, mobile phones, tablets, and smartwatches. The output port 31A includes at least one of a USB-A interface, a Micro USB interface, a USB Type-C interface, or a Lightning interface.

[0028] The transformer module 32 is used to boost or buck the DC power output from the rectifier module 21 and supply power to the output control module 31 so that the output port 31A can output the corresponding voltage. Specifically, the protocol chip 22 can be connected to the output port 31A and the transformer module 32. After the external device is connected to the corresponding output port 31A, the protocol chip 22 interacts with the external device through the output port 31A. The information exchange includes, but is not limited to, the remaining power of the external device and the rated charging power of the external device. Then, the protocol chip 22 can output the power parameter information corresponding to the external device to the transformer module 32 so that the transformer module 32 can output the charging power required by the external device, thereby achieving the matching of the output power of the power supply circuit 2 with the external device. In other embodiments, the above process can be referred to as handshake communication between the charging device 1 and the external device.

[0029] For example, the fast charging protocols supported by protocol chip 22 include at least one of USB PD (Power Delivery) fast charging protocol, QC (Quick Charge) fast charging protocol, FCP (Fast Charge Protocol) protocol, SCP (Super Charge Protocol) protocol, and Mi Turbo Charge protocol. In other embodiments, the fast charging protocols supported by protocol chip 22 may also include other types, which can be selected specifically according to the applicable scope of the product. The fast charging mode involved in this application is the charging mode that the output port 31A matches with the fast charging protocol.

[0030] It is understandable that, in order to adapt to the above-mentioned fast charging protocol and market demand, the output port 31A in this application is described using USB Type-C as an example.

[0031] The controller 33 is connected to the output control module 31 and is used to control the output control module 31 to be turned on so that the transformer module 32 can supply power to external devices through the turned-on output control module 31.

[0032] In this embodiment, the multi-port output control circuit 3 may include N output control modules 31 and M transformer modules 32. Each output control module 31 includes an output port 31A, where N≥2. Each transformer module 32 is connected to at least two output control modules 31, where 1≤M<N. The controller 33 is connected to all N output control modules 31.

[0033] When up to M output ports 31A are connected to external devices, the controller 33 controls the corresponding output control module 31 to turn on, so that the transformer module 32 can supply power to the external devices in fast charging mode through the output control module 31. This allows the charging device 1 to fast charge each external device when up to M external devices are connected to M output ports 31A simultaneously, thereby improving the charging efficiency of each external device. Furthermore, when the number of external devices that the user needs to charge is up to M, connecting the external devices to any output port 31A will allow the charging device 1 to fast charge the external devices, eliminating the need for the user to select the corresponding output port 31A according to the instruction manual or labels, thus improving user convenience.

[0034] Furthermore, since M < N, the number of transformer modules 32 is less than the number of output control modules 31, which reduces the number of transformer modules 32 in the charging device 1. This results in a smaller space occupied by the transformer modules 32 in the housing 11, thus making the overall size of the charging device 1 smaller and easier to carry and use. Moreover, the smaller number of transformer modules 32 also reduces the overall cost of the charging device 1.

[0035] It is understood that the transformer module 32 may include a transformer or a DC / DC converter. In other embodiments, the transformer module 32 may be replaced entirely with an AC / DC converter module, in which case the rectifier module 21 is not required, thereby reducing the number of components used in the power supply circuit 2 and reducing the overall cost of the charging device 1.

[0036] Referring to Figures 2 and 3, in one specific embodiment, each output control module 31 further includes a control sub-circuit 311, which is connected to the output port 31A, the transformer module 32, and the controller 33. When the charging device 1 detects that the corresponding output port 31A is connected to an external device, the controller 33 controls the preset control sub-circuit 311 to be turned on, so that the transformer module 32 can supply power to the output port 31A via the control sub-circuit 311, thereby enabling the output port 31A to supply power to the external device.

[0037] It is understandable that the number of control sub-circuits 311 in the output control module 31 can be one, two, three, etc. Each control sub-circuit 311 can be connected to different transformer modules 32, so that each output port 31A can correspond to at least one transformer module 32. When at least one transformer module 32 is not supplying power to the outside, the controller 33 can control the control sub-circuit 311 corresponding to that transformer module 32 to be turned on, so that the transformer module 32 can supply power to the output port 31A through the control sub-circuit 311 to fast charge the external device, thereby increasing the probability that the output port 31A can fast charge the external device, improving the user's charging experience, and also improving the charging efficiency of the external device.

[0038] In one embodiment, when N=2 and M=1, the multi-port output control circuit 3 may include two output control modules 31 and a transformer module 32. Each control module 311 may include a control sub-circuit 311, and both control sub-circuits 311 are connected to the transformer module 32. When one of the output ports 31A is connected to an external device, the controller 33 controls the control sub-circuit 311 corresponding to the output port 31A connected to the external device to be turned on, so that the transformer module 32 can supply power to the external device in fast charging mode through the output control module 31.

[0039] Referring to Figures 2 and 3, in another embodiment, when N=4 and M=2, the multi-port output control circuit 3 may include four output control modules 31 and two transformer modules 32. Each output control module 31 includes two control sub-circuits 311. Both control sub-circuits 311 are connected to the output port 31A and the controller 33, and are respectively connected to the two transformer modules 32.

[0040] Specifically, any two of the four output ports 31A can be selected as the first output port and the second output port. When the first output port is connected to an external device, the controller 33 controls the corresponding control module 311 of the first output port to be turned on, so that a transformer module 32 supplies power to the first output port through the control module 311, thereby enabling the first output port to supply power to the external device in fast charging mode.

[0041] When the second output port is connected to an external device, the controller 33 controls the corresponding control module 311 of the second output port to be turned on, so that the other transformer module 32 can supply power to the second output port through the control module 311, thereby enabling the second output port to supply power to the external device in fast charging mode. When up to two output ports 31A are connected to an external device, the controller 33 controls the output control module 31 corresponding to the output port 31A connected to the external device to be turned on, so that the transformer module 32 can supply power to the external device in fast charging mode through the output control module 31.

[0042] Referring to Figures 2 and 4, in another embodiment, when N=4 and M=3, the multi-port output control circuit 3 may include four output control modules 31 and three transformer modules 32. The four output control modules 31 are respectively a first output control module, a second output control module, a third output control module, and a fourth output control module (refer to Figure 4, from top to bottom, they can be respectively the first output control module, the second output control module, the third output control module, and the fourth output control module); the first output control module and the fourth output control module each have one control sub-circuit 311; the second output control module and the third output control module each have two control sub-circuits 311. 1; The three transformer modules 32 are respectively the first transformer module, the second transformer module, and the third transformer module (please refer to Figure 4, from top to bottom they can be the first transformer module, the second transformer module, and the third transformer module). The first transformer module is connected to the control sub-circuit 311 of the first output control module and a control sub-circuit 311 in the second output control module; the second transformer module is connected to another control sub-circuit 311 in the second output control module and a control sub-circuit 311 in the third output control module; the third transformer module is connected to another control sub-circuit 311 in the third output control module and the control sub-circuit 311 of the fourth output control module.

[0043] Referring to Figures 2 and 4, for example, three ports from top to bottom are selected from the four output ports 31A, namely the first output port, the second output port, and the third output port. When the first output port is connected to an external device, the controller 33 controls the corresponding control module 311 of the first output port to be turned on, so that the first transformer module supplies power to the first output port through the control module 311, thereby enabling the first output port to supply power to the external device in fast charging mode.

[0044] When the second output port is connected to an external device, the controller 33 controls the corresponding control module 311 of the second output port to be turned on, so that the second transformer module can supply power to the second output port through the control module 311, thereby enabling the second output port to supply power to the external device in fast charging mode.

[0045] When the third output port 31A is connected to an external device, the controller 33 controls the corresponding control module 311 of the third output port 31A to be turned on, so that the third transformer module can supply power to the third output port 31A through the control module 311, thereby enabling the third output port 31A to supply power to the external device in fast charging mode.

[0046] Similarly, when up to three output ports 31A are connected to external devices, the controller 33 controls the output control module 31 corresponding to the output port 31A connected to the external device to be turned on, so that the transformer module 32 can supply power to the external device in fast charging mode through the output control module 31.

[0047] It is understood that in other embodiments, each transformer module 32 can also be connected to three or four output control modules 31 at the same time. Different connection methods can be adapted by changing the control logic of the controller 33. No specific restrictions are imposed on this embodiment.

[0048] Referring to Figures 2-4, in one specific embodiment, the control sub-circuit 311 includes a first switch circuit 3111 and a second switch circuit 3112. The input terminal of the first switch circuit 3111 is connected to the transformer module 32, and the output terminal of the first switch circuit 3111 is connected to the input terminal of the output port 31A. The input terminal of the second switch circuit 3112 is connected to the controlled terminal of the first switch circuit 3111, the output terminal of the second switch circuit 3112 is connected to the ground terminal of the output port 31A, and the controlled terminal of the second switch circuit 3112 is connected to the controller 33.

[0049] When an external device is detected connected to the output port 31A, the controller 33 sends a conduction signal to the second switch circuit 3112 in the output control module 31 corresponding to the external device, so that the second switch circuit 3112 is turned on, thereby turning on the first switch circuit 3111, so that the transformer module 32 can supply power to the output port 31A through the first switch circuit 3111, so that the output port 31A can supply power to the external device in fast charging mode.

[0050] Referring to Figures 2-4, in one embodiment, the first switching circuit 3111 includes a first switching element Q1, a second switching element Q2, a first resistor R1, a first diode D1, and a second diode D2. The input terminal of the first switching element Q1 is connected to the input terminal of the first switching circuit 3111; the input terminal of the second switching element Q2 is connected to the output terminal of the first switching element Q1, and the output terminal of the second switching element Q2 is connected to the output terminal of the first switching circuit 3111; the controlled terminal of the second switching element Q2 is connected to the controlled terminal of the first switching element Q1 and also to the controlled terminal of the first switching circuit 3111; the first resistor R1 connects the output terminal and the controlled terminal of the first switching element Q1; the anode of the first diode D1 is connected to the input terminal of the first switching element Q1, and the cathode of the first diode D1 is connected to the output terminal of the first switching element Q1; the anode of the second diode D2 is connected to the output terminal of the second switching element Q2, and the cathode of the second diode D2 is connected to the input terminal of the second switching element Q2.

[0051] After the controller 33 controls the second switching circuit 3112 to be turned on, the transformer module 32 and the ground terminal of the output port 31A are connected in sequence through the first diode D1, the first resistor R1 and the second switching circuit 3112, so that a voltage drop is generated across the first resistor R1, which turns on the first switching element Q1 and the second switching element Q2, so that the output voltage of the transformer module 32 can supply power to the output port 31A through the first switching element Q1 and the second switching element Q2, so that the output port 31A can supply power to external devices.

[0052] Furthermore, by setting a second diode D2, when the corresponding transformer module 32 supplies power to other output ports 31A, this output port 31A can be prevented from becoming energized, thereby reducing the probability of electric shock to the user and providing reliable protection for user safety. It also reduces the power loss of the transformer module 32, improves energy utilization, and ensures that other output ports 31A can supply power to external devices in fast charging mode.

[0053] It is understood that the first switching element Q1 and the second switching element Q2 may each include at least one of a bipolar junction transistor (BJT), a metal-oxide-semiconductor (MOS), and an electromagnetic relay. In the embodiments of this application, the specific form of the first switching element Q1 and the second switching element Q2 is not limited.

[0054] For example, the first switching element Q1 and the second switching element Q2 can both be field-effect transistors, the first diode D1 can be a parasitic diode of the first switching element Q1, and the second diode D2 can be a parasitic diode of the second switching element Q2.

[0055] Referring to Figures 2-4, specifically, the first switching element Q1 includes a first PMOS transistor (P-Metal-Oxide-Semiconductor) and a first parasitic diode. The drain of the first PMOS transistor is connected to the input terminal of the first switching circuit 3111; the anode of the first parasitic diode is connected to the drain of the first PMOS transistor, and the cathode of the first parasitic diode is connected to the source of the first PMOS transistor. The second switching element Q2 includes a second PMOS transistor and a second parasitic diode. The source of the second PMOS transistor is connected to the drain of the first PMOS transistor, and the drain of the second PMOS transistor is connected to the output terminal of the first switching circuit 3111. The gate of the second PMOS transistor is connected to the gate of the first PMOS transistor; the anode of the second parasitic diode is connected to the drain of the second PMOS transistor, and the cathode of the second parasitic diode is connected to the source of the second PMOS transistor. A first resistor R1 connects the source and gate of the first PMOS transistor.

[0056] After the controller 33 controls the second switching circuit 3112 to turn on, the transformer module 32 and the output port 31A can be connected sequentially through the first parasitic diode, the first resistor R1 and the second switching circuit 3112, so that a voltage drop is generated across the first resistor R1, so that the source voltage of the first PMOS transistor is higher than the gate voltage, and the source voltage of the second PMOS transistor is also higher than the gate voltage, thereby making the source and drain of the first PMOS transistor connected, and also making the source and drain of the second PMOS transistor connected, thereby making the first switching circuit 3111 turn on, and thus enabling the transformer module 32 to supply power to the output port 31A through the first PMOS transistor and the second PMOS transistor.

[0057] It is understandable that the first switching element Q1 may also include an NMOS transistor (N-Metal-Oxide-Semiconductor), and the second switching element Q2 may also include an NMOS transistor, which will not be elaborated on here.

[0058] Referring to Figures 2-4, in one embodiment, the second switching circuit 3112 includes a third switching element Q3 and a second resistor R2. The input terminal of the third switching element Q3 is connected to the input terminal of the second switching circuit 3112, the output terminal of the third switching element Q3 is connected to the output terminal of the second switching circuit 3112, and the controlled terminal of the third switching element Q3 is connected to the controlled terminal of the second switching circuit 3112. The second resistor R2 is connected to both the output terminal and the controlled terminal of the third switching element Q3.

[0059] When an external device is detected connected to the output port 31A, the controller 33 sends a turn-on signal to the second switching circuit 3112 in the output control module 31 corresponding to the external device, so that a voltage difference is generated across the second resistor R2, thereby turning on the third switching element Q3. This causes the gates of the first PMOS transistor and the second PMOS transistor to be connected to the ground terminal of the output port 31A via the third switching element Q3, thereby generating a voltage drop across the first resistor R1, which in turn turns on the first PMOS transistor and the second PMOS transistor. This allows the output voltage of the transformer module 32 to supply power to the output port 31A via the first PMOS transistor and the second PMOS transistor, enabling the output port 31A to supply power to the external device.

[0060] It is understood that the third switching element Q3 may include at least one of a transistor, a field-effect transistor, and an electromagnetic relay. In the embodiments of this application, the specific form of the third switching element Q3 is not limited.

[0061] For example, the third switching element Q3 can be a field-effect transistor. Specifically, the first switching element Q1 can be an NMOS transistor. The drain of the NMOS transistor is the input terminal of the third switching element Q3, the source of the NMOS transistor is the output terminal of the third switching element Q3, and the gate of the NMOS transistor is the controlled terminal of the third switching element Q3. When the controller 33 sends a conduction signal to the second switching circuit 3112, the conduction signal can cause a voltage drop across the second resistor R2, so that the gate voltage of the NMOS transistor is greater than the source voltage, thereby making the source and drain of the NMOS transistor conduct. This makes the gates of the first PMOS transistor and the second PMOS transistor conduct through the NMOS transistor to the ground terminal of the output port 31A, so that the first switching circuit 3111 conducts, and then the transformer module 32 can supply power to the output port 31A through the first PMOS transistor and the second PMOS transistor.

[0062] It is understandable that the third switching element Q3 can also be a PMOS transistor, which will not be elaborated on here.

[0063] Referring to Figures 2-4, the control sub-circuit 311 further includes a third resistor R3. The third resistor R3 is connected to the controlled terminal of the first switching circuit 3111 and the input terminal of the second switching circuit 3112. The resistance of the third resistor R3 is several hundred kilohms, so that the resistance in the circuit from the self-transformer module 32 through the first parasitic diode, the third resistor R3, and the third switching element Q3 to the ground terminal of the output port 31A is much greater than the resistance in the circuit from the output terminal of the self-transformer module 32 through the output port 31A of the first switching circuit 3111. This results in a smaller current in the circuit from the self-transformer module 32 through the first parasitic diode, the third resistor R3, and the third switching element Q3 to the ground terminal of the output port 31A, thus reducing the power loss in this circuit and reducing the overall power loss of the control sub-circuit 311. Consequently, the power utilization rate of the multi-port output control circuit 3 is higher, and the power utilization rate of the charging device 1 is also higher.

[0064] It is understandable that if the number of external devices connected to the charging device 1 is greater than the number of transformer modules 32, the charging device 1 can obtain the charging power and remaining power of each external device through handshake communication, and reasonably allocate the output power of each output port 31A.

[0065] For example, when the same transformer module 32 is connected to two external devices, the charging device 1 can obtain the rated charging power and remaining power of the two external devices through handshake communication. It can control the output power of the output port 31A connected to the external device with higher power to decrease, and control the output power of the output port 31A connected to the external device with lower power to increase. This can improve the charging efficiency of the charging device 1 for charging the external device with lower power, thereby improving the charging efficiency of the charging device 1 for charging external devices and also improving the energy utilization rate of the charging device 1.

[0066] For example, when the same transformer module 32 is connected to two external devices, the charging device 1 can obtain the rated charging power and remaining power of the two external devices through handshake communication. If the charging device 1 detects that one of the external devices is disconnected from the output port 31A, the charging device 1 can control the transformer module 32 to supply power to the other external device in fast charging mode, so as to improve the charging efficiency of the charging device 1 for the other external device.

[0067] It is understood that the power distribution method of the charging device 1 when supplying power to at least two external devices for the same transformer module 32 can also take other forms, and no specific restrictions are imposed on this in the embodiments of this application.

[0068] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0069] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multi-port output control circuit, wherein, Applicable to power supply circuits, the multi-port output control circuit includes: There are N output control modules, each of which includes an output port configured to connect to an external device, where N ≥ 2; M transformer modules, each transformer module being connected to at least two output control modules, wherein 1 ≤ M < N; and A controller, connected to each of the output control modules, is configured to control the on / off state of the output control modules; When up to M external devices are connected to the output port simultaneously, the transformer module can supply power to the external devices in fast charging mode through the output control module.

2. The multi-port output control circuit as described in claim 1, wherein, Each of the aforementioned output control modules further includes: The control sub-circuit is connected to the output port, the transformer module, and the controller.

3. The multi-port output control circuit as described in claim 2, wherein, When N=4 and M=2, each output control module includes two control sub-circuits, both of which are connected to the output port and the controller, and are also connected to the two transformer modules respectively. When at most two output ports are connected to the external device, the controller controls the corresponding output control module to turn on, so that the transformer module can supply power to the external device in fast charging mode through the output control module.

4. The multi-port output control circuit as described in claim 2, wherein, When N=4 and M=3 The four output control modules include a first output control module, a second output control module, a third output control module, and a fourth output control module; Both the first output control module and the fourth output control module have one of the control sub-circuits; Both the second output control module and the third output control module have two control sub-circuits; The three transformer modules include a first transformer module, a second transformer module, and a third transformer module; The first transformer module is connected to the control sub-circuit of the first output control module and one of the control sub-circuits of the second output control module; The second transformer module is connected to another control sub-circuit in the second output control module and one of the control sub-circuits in the third output control module; The third transformer module is connected to another control sub-circuit in the third output control module and the control sub-circuit of the fourth output control module; When up to three output ports are connected to the external device, the controller controls the corresponding output control module to be connected, so that the transformer module can supply power to the external device in fast charging mode through the output control module.

5. The multi-port output control circuit as described in claim 2, wherein, The control sub-circuit includes: A first switching circuit, wherein the input terminal of the first switching circuit is connected to the transformer module, and the output terminal of the first switching circuit is connected to the input terminal of the output port; and The second switching circuit has its input terminal connected to the controlled terminal of the first switching circuit, its output terminal connected to the ground terminal of the output port, and its controlled terminal connected to the controller.

6. The multi-port output control circuit as described in claim 5, wherein, The first switching circuit includes: A first switching element, the input terminal of which is connected to the input terminal of the first switching circuit; The second switching element has its input terminal connected to the output terminal of the first switching element, its output terminal connected to the output terminal of the first switching circuit, and its controlled terminal connected to both the controlled terminal of the first switching element and the controlled terminal of the first switching circuit. The first resistor is connected to the output terminal and the controlled terminal of the first switching element; A first diode, the anode of which is connected to the input terminal of the first switching element, and the cathode of which is connected to the output terminal of the first switching element; and The second diode has its anode connected to the output terminal of the second switching element and its cathode connected to the input terminal of the second switching element.

7. The multi-port output control circuit as described in claim 5, wherein, The first switching circuit includes: The first switching element includes a first PMOS transistor and a first parasitic diode. The drain of the first PMOS transistor is connected to the input terminal of the first switching circuit. The anode of the first parasitic diode is connected to the drain of the first PMOS transistor, and the cathode of the first parasitic diode is connected to the source of the first PMOS transistor. The second switching element includes a second PMOS transistor and a second parasitic diode. The source of the second PMOS transistor is connected to the drain of the first PMOS transistor, the drain of the second PMOS transistor is connected to the output terminal of the first switching circuit, and the gate of the second PMOS transistor is connected to the gate of the first PMOS transistor. The anode of the second parasitic diode is connected to the drain of the second PMOS transistor, and the cathode of the second parasitic diode is connected to the source of the second PMOS transistor. The first resistor is connected to the source and gate of the first PMOS transistor.

8. The multi-port output control circuit as described in claim 5, wherein, The second switching circuit includes: A third switching element, wherein the input terminal of the third switching element is connected to the input terminal of the second switching circuit, the output terminal of the third switching element is connected to the output terminal of the second switching circuit, and the controlled terminal of the third switching element is connected to the controlled terminal of the second switching circuit; and The second resistor is connected to the output terminal and the controlled terminal of the third switching element.

9. The multi-port output control circuit as described in claim 5, wherein, The control sub-circuit also includes: The third resistor connects the controlled terminal of the first switching circuit to the input terminal of the second switching circuit.

10. The multi-port output control circuit as described in claim 1, wherein, When more than M of the output ports are connected to the external device, at least one of the transformer modules supplies power to the external device through at least two of the output control modules.

11. A power supply circuit, wherein, include: The rectifier module has an AC input terminal and a DC output terminal, wherein the AC input terminal of the rectifier module is configured to be connected to the mains power. The multi-port output control circuit as described in claim 1, wherein the input terminal of the transformer module is connected to the DC output terminal of the rectifier module; and The protocol chip is connected to the transformer module and the output port.

12. A charging device, wherein, include: The housing has a mains power interface; The circuit board is disposed within the housing; as well as The power supply circuit as described in claim 11 is disposed on the circuit board, the AC input terminal of the rectifier module is connected to the mains power interface, and the output port is disposed on the housing and exposed.

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