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

Abstract

The embodiment of the utility model discloses a multi-port output control circuit, a power supply circuit and a charging device. 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 used for being connected with external equipment, and N is larger than or equal to 2; each transformer module is connected with at least two output control modules, and 1 < = M < N; the controller is connected with each output control module and is used for controlling the on-off of the output control module; when at most M external devices are connected with the output port at the same time, the charging device can quickly charge each external device. When the number of the external devices needing to be charged by the user is at most M, the external devices are connected with any output port, the external devices can be quickly charged through the charging device, the corresponding output port does not need to be selected according to the specification or the identifier, and therefore the use convenience of the user can be improved.

Description

Technical Field

[0001] This application relates to the field of charging devices, and more particularly, to a multi-port output control circuit, a power supply circuit, and a charging device. Background Art

[0002] Nowadays, the number of smart devices that need to be charged in daily life is increasing. 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 require fast charging. Therefore, multi-port charging devices have been derived from the technology of traditional single-port charging devices.

[0003] In the related art, in order to use a multi-port charging device to fast charge an external device, it is often necessary to connect to the corresponding fast charging interface. However, the number of interfaces in the multi-port charging device is large, and it is difficult for users to find the corresponding fast charging interface to charge the external device, which brings inconvenience to users. Utility Model Content

[0004] Embodiments of this application provide a multi-port output control circuit, a power supply circuit, and a charging device, aiming to enable, when the number of external devices that the user needs to charge is at most the same as the number of transformer modules, connecting the external device to any output port, and the charging device can fast charge the external device through the output control module, without the need to select the corresponding output port according to the instruction manual or label, thereby improving the user's convenience of use.

[0005] Embodiments of this application provide a multi-port output control circuit, which is applicable to a power supply circuit. 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 for connecting 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 for controlling the on / off of the output control module; where, 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 conduct, so that the transformer module can supply power to the external device in a fast charging mode through the output control module.

[0006] Based on the above embodiments, when at most M external devices are connected to M output ports at the same time, the charging device can fast charge each external device to improve the charging efficiency of each external device. And when the number of external devices that the user needs to charge is at most M, connecting the external device to any output port, the charging device can fast charge the external device, without the need to select the corresponding output port according to the instruction manual or label, thereby improving the user's convenience of use.

[0007] An embodiment of the present application also provides a power supply circuit, including a rectification module, a multi-port output control circuit, and a protocol chip. The rectification module has an AC input terminal and a DC output terminal, and the AC input terminal of the rectification module is used to connect to the mains power. The input terminal of the transformer module is connected to the DC output terminal of the rectification module. The protocol chip is connected to the transformer module and the output port.

[0008] An embodiment of the present application also provides a charging device, including a housing, a circuit board, and a power supply circuit. The housing has a mains 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 rectification module is connected to the mains power interface, and the output port is disposed on the housing and exposed.

[0009] Based on the multi-port output control circuit of the present application, when external devices are connected to at most M output ports, the controller controls the output control module corresponding to the output port to which the external device is connected to conduct, so that the transformer module can supply power to the external device in a fast charging mode through the output control module. When at most M external devices are simultaneously connected to M output ports, the charging device can fast charge each external device, thereby improving the charging efficiency of each external device. And when the number of external devices that the user needs to charge is at most M, connecting the external device to any output port can fast charge the external device through the charging device, and the user does not need to select the corresponding output port according to the instruction manual or label, thus improving the user's convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0011] Figure 1 It is a schematic structural diagram of a charging device in an embodiment of the present application;

[0012] Figure 2 It is a schematic framework structural diagram of a power supply circuit in an embodiment of the present application;

[0013] Figure 3 It is a schematic structural diagram of a multi-port output control circuit in an embodiment of the present application;

[0014] Figure 4 It is a schematic structural diagram of a multi-port output control circuit in another embodiment of the present application.

[0015] Description of reference numerals: 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 subcircuit; 3111, first switch circuit; 3112, second switch circuit; 32, transformer module; 33, controller; Q1, first switch element; Q2, second switch element; Q3, third switch element; R1, first resistor; R2, second resistor; R3, third resistor; D1, first diode; D2, second diode. Specific implementation method

[0016] In order to make the purpose, technical solutions and advantages of this application more clear, the following is a further detailed description of this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain this application and are not used to limit this application.

[0017] Please refer to Figure 1 , the embodiment of the present application provides a charging device 1, including a housing 11, a circuit board 12 and a power supply circuit 2.

[0018] The shell 11 can support and protect the electronic components disposed in the shell 11. The shell 11 can be made of plastic or metal. Specifically, the shell 11 can be made of plastic to insulate the shell 11, thereby reducing the risk of electric shock to the user. In addition, since the plastic material is light in weight, the shell 11 is light in weight, thereby making the overall weight of the charging device 1 lighter, so that the user can carry and use the charging device 1 more conveniently. Specifically, the shell 11 can be integrally injection molded to make the shell 11 have a high structural strength, so that the shell 11 is not easily damaged, and can protect other components in the shell 11 to reduce the probability of damage to other components, thereby making the charging device 1 have a longer service life.

[0019] The housing 11 also has a mains power interface (not shown in the figure), which is used to connect to the mains power.

[0020] The power circuit 2 can be formed on the circuit board 12 through an etching process, thereby improving the production efficiency of the power circuit 2 and further reducing the production cost of the power circuit 2.

[0021] It can be understood that the charging device 1 can be a mobile power source and a charger, and the specific form of the charging device 1 is not limited in this application.

[0022] 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.

[0023] The rectification module 21 has an AC input terminal and a DC output terminal. The AC input terminal of the rectification module 21 can be connected to the mains interface of the housing 11, and the DC output terminal of the rectification module 21 is connected to the multi-port output control circuit 3.

[0024] Exemplarily, the rectification module 21 may include a rectification circuit (not shown in the figure), a filtering circuit (not shown in the figure), and a voltage stabilizing circuit (not shown in the figure). The rectification circuit is used to rectify alternating current into direct current, and the rectification circuit includes, but is not limited to, a bridge rectification circuit and a PWM (pulse width modulation) rectification circuit. The filtering circuit is used to filter the pulsating direct current output by the rectification circuit so that the waveform of the output direct current is smooth. The voltage stabilizing circuit is used to keep the output voltage constant. In the embodiments of the present application, the specific form of the rectification module 21 is not limited.

[0025] Please refer to Figure 2 , in an embodiment of the present application, the multi-port output control circuit 3 includes an output control module 31, a transformer module 32, and a controller 33;

[0026] The output control module 31 includes an output port 31A. The output port 31A is used to connect to an external device. The output port 31A is connected to the housing 11 and is exposed via the housing 11 to facilitate the connection between the external device and the output port 31A. The charging device 1 can access the mains power and supply power to the external device via the output port 31A. The external devices include, but are not limited to, mobile phones, tablet computers, and smart watches. 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.

[0027] The transformer module 32 is used to boost or step down the direct current output by the rectification module 21 and then supply power to the output control module 31 so that the output port 31A outputs a 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 content of the information interaction 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 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 realizing the matching of the output power of the power supply circuit 2 and the external device. The above process can be referred to as the handshake communication between the charging device 1 and the external device in other embodiments.

[0028] Exemplarily, the fast charging protocols supported by the protocol chip 22 include at least one of the USB PD (Power Delivery) fast charging protocol, the QC (Quick Charge) fast charging protocol, the FCP (Fast Charge Protocol), the SCP (Super Charge Protocol), and the Mi Turbo Charge protocol. In other embodiments, the fast charging protocols supported by the protocol chip 22 may also include other types, which can be selected according to the applicable scope of the product. The fast charging mode involved in this application is the charging mode in which the output port 31A matches the fast charging protocol.

[0029] It can be understood that, in order to adapt to the above fast charging protocols and market demands, the output port 31A in this application is described by taking the USB Type-C as an example.

[0030] The controller 33 is connected to the output control module 31 and is used to control the output control module 31 to conduct, so that the transformer module 32 can supply power to an external device via the turned-on output control module 31.

[0031] In the embodiment of this application, 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.

[0032] When at most M output ports 31A are connected to external devices, the controller 33 controls the corresponding output control modules 31 to conduct, so that the transformer module 32 can supply power to the external devices in the fast charging mode through the output control modules 31. When at most M external devices are simultaneously connected to the M output ports 31A, the charging device 1 can fast charge each external device to improve the charging efficiency of each external device. And when the number of external devices that the user needs to charge is at most M, connecting the external devices to any output port 31A can fast charge the external devices through the charging device 1, and the user does not need to select the corresponding output port 31A according to the instruction manual or label, thereby improving the user's convenience of use.

[0033] Moreover, since M<N, the number of transformer modules 32 is less than the number of output control modules 31, which can make the number of transformer modules 32 in the charging device 1 less, so that the space occupied by the transformer module 32 in the housing 11 is smaller, and thus the overall volume of the charging device 1 is smaller, making the charging device 1 more convenient to carry and use. And since the number of transformer modules 32 is less, the overall cost of the charging device 1 can also be reduced.

[0034] Please refer to Figure 2 and Figure 3 In a specific embodiment, each output control module 31 further includes a control sub-circuit 311. The control sub-circuit 311 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 conduct, so that the transformer module 32 can supply power to the output port 31A via the control sub-circuit 311, enabling the output port 31A to supply power to the external device.

[0035] It can be understood that the number of control sub-circuits 311 in the output control module 31 can be one, two, three... Each control sub-circuit 311 can be connected to a different transformer module 32, so that each output port 31A can correspond to at least one transformer module 32. Thus, when at least one transformer module 32 is not supplying power externally, the controller 33 can control the control sub-circuit 311 corresponding to that transformer module 32 to conduct, so that the transformer module 32 can supply power to the output port 31A via 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.

[0036] In one embodiment, when N = 2 and M = 1, the multi-port output control circuit 3 can include two output control modules 31 and one transformer module 32. Each control module 311 can include one control sub-circuit 311, and the two control sub-circuits 311 are both connected to the transformer module 32. When an external device is connected to one of the output ports 31A, the controller 33 controls the control sub-circuit 311 corresponding to the output port 31A to which the external device is connected to conduct, so that the transformer module 32 can supply power to the external device in a fast charge mode through the output control module 31.

[0037] Please refer to Figure 2 and Figure 3 In another embodiment, when N = 4 and M = 2, the multi-port output control circuit 3 can include four output control modules 31 and two transformer modules 32. Each output control module 31 includes two control sub-circuits 311. The two control sub-circuits 311 are both connected to the output port 31A and the controller 33, and are respectively connected to the two transformer modules 32.

[0038] Specifically, any two of the four output ports 31A are respectively 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 a control module 311 corresponding to the first output port to conduct, so that a transformer module 32 supplies power to the first output port via the control module 311, so that the first output port can supply power to the external device in a fast charging mode.

[0039] When the second output port is connected to an external device, the controller 33 controls a control module 311 corresponding to the second output port to conduct, so that another transformer module 32 can supply power to the second output port via the control module 311, so that the second output port can supply power to the external device in a fast charging mode. When at most 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 conduct, so that the transformer module 32 can supply power to the external device in a fast charging mode through the output control module 31.

[0040] Please refer to Figure 2 and Figure 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 the first output control module, the second output control module, the third output control module, and the fourth output control module (please refer to Figure 4 , from top to bottom, they may be the first output control module, the second output control module, the third output control module, and the fourth output control module respectively); both the first output control module and the fourth output control module have one control sub-circuit 311; both the second output control module and the third output control module have two control sub-circuits 311; 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 may be the first transformer module, the second transformer module, and the third transformer module respectively). The first transformer module is connected to the control sub-circuit 311 of the first output control module and one control sub-circuit 311 in the second output control module; the second transformer module is connected to the other control sub-circuit 311 in the second output control module and one control sub-circuit 311 in the third output control module; the third transformer module is connected to the other control sub-circuit 311 in the third output control module and the control sub-circuit 311 of the fourth output control module.

[0041] Please refer to Figure 2 and Figure 4, Exemplarily, three ports from the four output ports 31A are selected from top to bottom, 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 a control module 311 corresponding to the first output port to conduct, so that the first transformer module supplies power to the first output port via the control module 311, enabling the first output port to supply power to the external device in a fast charging mode.

[0042] When the second output port is connected to an external device, the controller 33 controls a control module 311 corresponding to the second output port to conduct, so that the second transformer module can supply power to the second output port via the control module 311, enabling the second output port to supply power to the external device in a fast charging mode.

[0043] When the third output port 31A is connected to an external device, the controller 33 controls a control module 311 corresponding to the third output port 31A to conduct, so that the third transformer module can supply power to the third output port 31A via the control module 311, enabling the third output port 31A to supply power to the external device in a fast charging mode.

[0044] By analogy, when at most three 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 conduct, so that the transformer module 32 can supply power to the external device in a fast charging mode through the output control module 31.

[0045] It can be 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. By changing the control logic of the controller 33, different connection methods can be adapted, and no specific limitations are imposed in the embodiments of the present application.

[0046] Please refer to Figures 2-4 , In a specific embodiment, the control sub-circuit 311 includes a first switch circuit 3111 and a second switch circuit 3112. The input end of the first switch circuit 3111 is connected to the transformer module 32, and the output end of the first switch circuit 3111 is connected to the input end of the output port 31A; the input end of the second switch circuit 3112 is connected to the controlled end of the first switch circuit 3111, the output end of the second switch circuit 3112 is connected to the ground end of the output port 31A, and the controlled end of the second switch circuit 3112 is connected to the controller 33.

[0047] When it is detected that an external device is 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 connected external device, so that the second switch circuit 3112 is turned on, thereby causing the first switch circuit 3111 to be turned on, so that the transformer module 32 can supply power to the output port 31A via the first switch circuit 3111, so that the output port 31A can supply power to the external device in a fast charging mode.

[0048] Please refer to Figures 2-4 , in an embodiment, the first switch circuit 3111 includes a first switch element Q1, a second switch element Q2, a first resistor R1, a first diode D1, and a second diode D2. The input end of the first switch element Q1 is connected to the input end of the first switch circuit 3111; the input end of the second switch element Q2 is connected to the output end of the first switch element Q1, the output end of the second switch element Q2 is connected to the output end of the first switch circuit 3111, the controlled end of the second switch element Q2 is connected to the controlled end of the first switch element Q1, and is connected to the controlled end of the first switch circuit 3111; the first resistor R1 is connected to the output end and the controlled end of the first switch element Q1; the positive electrode of the first diode D1 is connected to the input end of the first switch element Q1, and the negative electrode of the first diode D1 is connected to the output end of the first switch element Q1; the positive electrode of the second diode D2 is connected to the output end of the second switch element Q2, and the negative electrode of the second diode D2 is connected to the input end of the second switch element Q2.

[0049] After the controller 33 controls the second switch circuit 3112 to be turned on, the transformer module 32 and the ground terminal of the output port 31A are sequentially turned on via the first diode D1, the first resistor R1, and the second switch circuit 3112, so that a voltage drop is generated across the first resistor R1, causing the first switch element Q1 and the second switch element Q2 to be turned on, so that the output voltage of the transformer module 32 can supply power to the output port 31A via the first switch element Q1 and the second switch element Q2, so that the output port 31A can supply power to the external device.

[0050] Furthermore, by setting the second diode D2, when the corresponding transformer module 32 supplies power to other output ports 31A, this output port 31A can be prevented from being charged, reducing the probability of electric shock to the user, thereby providing a reliable guarantee for the user's safety in use. And it can reduce the power loss of the transformer module 32, improve the power utilization rate, and ensure that other output ports 31A can supply power to the external device in a fast charging mode.

[0051] It can be understood that each of the first switching element Q1 and the second switching element Q2 may include at least one of a bipolar junction transistor (BJT), a metal-oxide-semiconductor (MOS), and an electromagnetic relay. In the embodiments of the present application, the specific forms of the first switching element Q1 and the second switching element Q2 are not limited.

[0052] Exemplarily, both the first switching element Q1 and the second switching element Q2 may be MOS transistors. The first diode D1 may be a parasitic diode of the first switching element Q1, and the second diode D2 may be a parasitic diode of the second switching element Q2.

[0053] Please refer to Figures 2-4 , specifically, the first switching element Q1 includes a first P-Metal-Oxide-Semiconductor (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 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, the drain of the second PMOS transistor is connected to the output terminal of the first switching circuit 3111, 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 R1 is connected to the source and the gate of the first PMOS transistor.

[0054] After the controller 33 controls the second switching circuit 3112 to conduct, the transformer module 32 and the output port 31A can be conducted in sequence 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 also makes the source voltage of the second PMOS transistor higher than the gate voltage, thereby making the source and the drain of the first PMOS transistor conduct, and also making the source and the drain of the second PMOS transistor conduct, so that the first switching circuit 3111 conducts, and further enabling the transformer module 32 to supply power to the output port 31A through the first PMOS transistor and the second PMOS transistor.

[0055] It can be understood that the first switching element Q1 may further include an NMOS transistor (N-Metal-Oxide-Semiconductor), and the second switching element Q2 may further include an NMOS transistor, which will not be elaborated here.

[0056] Please refer 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 end of the third switching element Q3 is connected to the input end of the second switching circuit 3112, the output end of the third switching element Q3 is connected to the output end of the second switching circuit 3112, and the controlled end of the third switching element Q3 is connected to the controlled end of the second switching circuit 3112; the second resistor R2 is connected to the output end and the controlled end of the third switching element Q3.

[0057] When it is detected that an external device is connected to the output port 31A, the controller 33 sends a conduction signal to the second switching circuit 3112 in the output control module 31 corresponding to the connected external device, so as to generate a voltage difference across the two ends of the second resistor R2, so that the third switching element Q3 is turned on, and then the gates of the first PMOS transistor and the second PMOS transistor are connected to the ground terminal of the output port 31A through the third switching element Q3, so that a voltage drop can be generated across the two ends of the first resistor R1, so that the first PMOS transistor and the second PMOS transistor are turned on, so that the output voltage of the transformer module 32 can supply power to the output port 31A through the first PMOS transistor and the second PMOS transistor, so that the output port 31A can supply power to the external device.

[0058] It can be understood that the third switching element Q3 may include at least one of a triode, a field effect transistor, and an electromagnetic relay. In the embodiments of the present application, the specific form of the third switching element Q3 is not limited.

[0059] Exemplarily, the third switching element Q3 may be a field effect transistor. Specifically, the first switching element Q1 may be an NMOS transistor. The drain of the NMOS transistor is the input end of the third switching element Q3, the source of the NMOS transistor is the output end of the third switching element Q3, and the gate of the NMOS transistor is the controlled end of the third switching element Q3. When the controller 33 sends a conduction signal to the second switching circuit 3112, the conduction signal can generate a voltage drop across the two ends of the second resistor R2, so that the gate voltage of the NMOS transistor is greater than the source voltage, so that the source and drain of the NMOS transistor are turned on, so that the gates of the first PMOS transistor and the second PMOS transistor are connected to the ground terminal of the output port 31A through the NMOS transistor, so that the first switching circuit 3111 is turned on, and then the transformer module 32 can supply power to the output port 31A through the first PMOS transistor and the second PMOS transistor.

[0060] It can be understood that the third switching element Q3 can also be a PMOS transistor, and details thereof will not be elaborated herein.

[0061] Please refer to Figures 2-4 , further, the control sub-circuit 311 further includes a third resistor R3. The third resistor R3 is connected to the controlled end of the first switching circuit 3111 and the input end of the second switching circuit 3112, and the resistance value of the third resistor R3 is several hundred kiloohms, so that the resistance in the loop from the transformer module 32 via 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 larger than the resistance in the loop from the output terminal of the output port 31A of the first switching circuit 3111 of the transformer module 32, so that the current in the loop from the transformer module 32 via the first parasitic diode, the third resistor R3 and the third switching element Q3 to the ground terminal of the output port 31A is smaller, so that the power loss in this loop is smaller, so as to reduce the overall power loss of the control sub-circuit 311, and further improve the power utilization rate of the multi-port output control circuit 3, so as to improve the power utilization rate of the charging device 1.

[0062] It can be understood that if the number of external devices connected to the charging device 1 is more 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.

[0063] Exemplarily, 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, and 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, so as to improve the charging efficiency of the charging device 1 for charging the external device with lower power, so as to improve the charging efficiency of the charging device 1 for charging external devices, and also improve the power utilization rate of the charging device 1.

[0064] Exemplarily, 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 a fast charging mode, so as to improve the charging efficiency of the charging device 1 for charging the other external device.

[0065] It can be understood that there can be other forms of the power distribution method when the charging device 1 supplies power to at least two external devices by the same transformer module 32, and specific limitations are not made herein in the embodiments of the present application.

[0066] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0067] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A multi-port output control circuit, characterized in that: Applicable to a power supply circuit, the multi-port output control circuit comprises: N output control modules, each of which includes an output port, and the output port is used to connect to an external device, wherein N≥2; M transformer modules, each of which is connected to at least two output control modules, wherein 1≤M<N; A controller, connected to each of the output control modules, and used to control the on and off of the output control modules; Among them, when at most M external devices are connected to the output port at the same time, the transformer module can power the external devices in a fast charging mode through the output control module.

2. The multi-port output control circuit according to claim 1, characterized in that: Each of the output control modules further comprises: A control subcircuit is connected to the output port, the transformer module and the controller.

3. The multi-port output control circuit according to claim 2, characterized in that: When N=4 and M=2, each of the output control modules includes two control subcircuits, and the two control subcircuits are both connected to the output port and the controller, and are respectively connected to the two transformer modules; Among them, when at most two output ports are connected to the external device, the controller controls the corresponding output control module to be turned on, so that the transformer module can power the external device in fast charging mode through the output control module.

4. The multi-port output control circuit according to claim 2, characterized in that: 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; The first output control module and the fourth output control module each have one control subcircuit; The second output control module and the third output control module each 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 subcircuit of the first output control module and a control subcircuit in the second output control module; The second transformer module is connected to another control subcircuit in the second output control module and one control subcircuit in the third output control module; The third transformer module is connected to another control subcircuit in the third output control module and the control subcircuit of the fourth output control module; Among them, when at most three output ports are connected to the external device, the controller controls the corresponding output control module to be turned on, so that the transformer module can power the external device in fast charging mode through the output control module.

5. The multi-port output control circuit according to any one of claims 2 to 4, characterized in that: The control subcircuit comprises: a first switch circuit, wherein an input end of the first switch circuit is connected to the transformer module, and an output end of the first switch circuit is connected to an input end of the output port; A second switch circuit, wherein the input end of the second switch circuit is connected to the controlled end of the first switch circuit, the output end of the second switch circuit is connected to the ground end of the output port, and the controlled end of the second switch circuit is connected to the controller.

6. The multi-port output control circuit according to claim 5, characterized in that: The first switch circuit comprises: a first switch element, wherein an input terminal of the first switch element is connected to an input terminal of the first switch circuit; a second switch element, wherein an input end of the second switch element is connected to an output end of the first switch element, an output end of the second switch element is connected to an output end of the first switch circuit, and a controlled end of the second switch element is connected to a controlled end of the first switch element and to a controlled end of the first switch circuit; a first resistor, connected to the output end and the controlled end of the first switch element; a first diode, wherein an anode of the first diode is connected to an input end of the first switch element, and a cathode of the first diode is connected to an output end of the first switch element; A second diode, wherein an anode of the second diode is connected to the output end of the second switch element, and a cathode of the second diode is connected to the input end of the second switch element.

7. The multi-port output control circuit according to claim 5, characterized in that: The first switch circuit comprises: a first switch element, the first switch element comprising a first PMOS tube and a first parasitic diode, the drain of the first PMOS tube being connected to the input end of the first switch circuit; the anode of the first parasitic diode being connected to the drain of the first PMOS tube, and the cathode of the first parasitic diode being connected to the source of the first PMOS tube; a second switch element, the second switch element comprising a second PMOS tube and a second parasitic diode, the source of the second PMOS tube being connected to the drain of the first PMOS tube, the drain of the second PMOS tube being connected to the output end of the first switch circuit, and the gate of the second PMOS tube being connected to the gate of the first PMOS tube; the anode of the second parasitic diode being connected to the drain of the second PMOS tube, and the cathode of the second parasitic diode being connected to the source of the second PMOS tube; The first resistor is connected to the source and the gate of the first PMOS tube.

8. The multi-port output control circuit according to claim 5, characterized in that: The second switch circuit comprises: a third switch element, wherein an input end of the third switch element is connected to an input end of the second switch circuit, an output end of the third switch element is connected to an output end of the second switch circuit, and a controlled end of the third switch element is connected to a controlled end of the second switch circuit; The second resistor is connected to the output end and the controlled end of the third switch element.

9. The multi-port output control circuit according to claim 5, characterized in that: The control subcircuit also includes: The third resistor connects the controlled end of the first switch circuit and the input end of the second switch circuit.

10. The multi-port output control circuit according to claim 1, characterized in that: When more than M output ports are connected to the external device, at least one transformer module supplies power to the external device through at least two output control modules.

11. A power supply circuit, characterized in that: include: A rectifier module having an AC input terminal and a DC output terminal, wherein the AC input terminal of the rectifier module is used to access the mains; The multi-port output control circuit according to any one of claims 1 to 10, wherein the input end of the transformer module is connected to the DC output end of the rectifier module; A protocol chip is connected to the transformer module and the output port.

12. A charging device, characterized in that: include: A housing having a mains power interface; A circuit board is arranged in the housing; The power supply circuit as described in claim 11 is arranged on the circuit board, the AC input end of the rectifier module is connected to the mains interface, and the output port is arranged in the shell and exposed.

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