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

Abstract

To provide a multi-port output control circuit, a power supply circuit, and a charging device which are improved in user convenience.SOLUTION: The multi-port output control circuit includes N (N ≥ 2) output control modules, M (1 ≤ M <N) transformer modules and a controller, each of the output control modules includes an output port configured to be connected to an external device, each of the transformer modules is connected to at least two output control modules, the controller is connected to each of the output control modules and is configured to control the output control modules to be turned on or turned off, and when at most M external devices are connected to the output port at the same time, the charging apparatus can quickly charge each of the external devices. When the number of the external devices to be charged by the user is at most M, it is not necessary to find the corresponding output port according to the instruction manual or the tag, and the external device can be quickly charged by the charging device by connecting the external device to any output port.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present 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 technology]

[0002] Currently, there are an increasing number of smart devices that need to be charged in daily life. In addition to smart devices such as smartphones, handheld computers, and tablet computers, power tools, cordless vacuum cleaners, car vacuum cleaners, and other devices that support mainstream fast charging protocols all require fast charging. Therefore, multi-port charging devices are being developed based on the technology of traditional single-port charging equipment.

[0003] In related art, in order to fast charge external equipment using a multi-port charging device, it is often necessary to connect it to a corresponding fast charging port. However, due to the large number of ports on the multi-port charging device, it is difficult for users to find the corresponding fast charging port for charging the external equipment, which causes inconvenience to users. Summary of the Invention

[0004] The embodiments of the present application provide a multi-port output control circuit, a power supply circuit, and a charging device, and when the number of external devices that a user needs to charge is at most the same as the number of transformer modules, there is no need to find the corresponding output port based on the instruction manual or label. By connecting the external device to any output port, the charging device can quickly charge the external device, thereby improving the user's convenience.

[0005] The multi-port output control circuit according to the embodiment of the present application is applied to a power supply circuit and includes N (N≥2) output control modules, M (1≤M<N) transformer modules, and a controller. Each output control module includes an output port for connecting to an external device. Each transformer module is connected to at least two output control modules. The controller is connected to each output control module to control the on / off of the output control module. When at most M output ports are connected to an external device, 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 a fast charging mode through the output control module.

[0006] According to the above embodiment, when at most M external devices are simultaneously connected to M output ports, the charging device can rapidly charge each external device and improve the charging efficiency of each external device. When the number of external devices that require charging by the user is at most M, based on the user manual or label, there is no need to find the corresponding output port. When an external device is connected to any output port, the charging device can rapidly charge the external device, thereby improving the convenience of use for the user.

[0007] The power supply circuit according to the embodiment of the present application includes 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. The AC input terminal is connected to a commercial power supply, and 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] The charging device according to the embodiment of the present application includes a housing, a circuit board, and a power supply circuit. The housing has a commercial power supply port. The circuit board is provided in the housing, and the power supply circuit is provided on the circuit board. The AC input terminal of the rectification module is connected to the commercial power supply port, and the output port is provided on the housing and exposed.

[0009] According to the multi-port output control circuit of the present application, when at most M output ports are connected to external devices, the controller controls the output control modules corresponding to the output ports connected to the external devices to turn on, so that the transformer module can supply power to the external devices in fast charging mode via the output control modules. Therefore, when at most M external devices are simultaneously connected to the M output ports, the charging device can fast charge each external device, improving the charging efficiency of each external device. Furthermore, when a user needs to charge at most M external devices, the user does not need to find the corresponding output port based on the instruction manual or label, and can simply connect the external device to any output port and the charging device can fast charge the external device, thereby improving user convenience.

[0010] In order to more clearly explain the technical means in the embodiments of the present application or the prior art, the drawings necessary for explaining the embodiments or the prior art will be briefly described below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without any creative work. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a schematic configuration diagram of a charging device according to an embodiment of the present invention; [Figure 2] 1 is a block diagram showing the structure of a power supply circuit according to an embodiment of the present invention; [Figure 3] FIG. 1 is a schematic diagram of a multi-port output control circuit according to an embodiment of the present application. [Figure 4] FIG. 10 is a schematic diagram of a multi-port output control circuit according to another embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0012] In order to clarify the purpose, technical means and advantages of the present application, the present application will be described in more detail below with reference to the drawings and examples. It should be understood that the specific examples described in this specification are only for interpreting the present application, and are not intended to limit the present application.

[0013] As shown in FIG. 1, an embodiment of the present application provides a charging device 1 including a housing 11, a circuit board 12, and a power supply circuit 2.

[0014] The housing 11 can support and protect the electronic components provided therein, and the material of the housing 11 can be plastic or metal. Specifically, the material of the housing 11 can be plastic to insulate the housing 11 and reduce the risk of electric shock to the user. Because plastic materials are lightweight, the housing 11 is also lightweight, making the entire charging device 1 lightweight and making it easy for the user to carry and use the charging device 1. Specifically, the housing 11 can be injection-molded as a single unit to increase structural strength, making the housing 11 less susceptible to breakage and protecting other components within the housing 11 to reduce the probability of breakage of those components, thereby extending the service life of the charging device 1.

[0015] The housing 11 further has a commercial power port (not shown) for connection to a commercial power source.

[0016] Since the power supply circuit 2 can be formed on the circuit board 12 by an etching process, the manufacturing efficiency of the power supply circuit 2 can be improved, and further, the manufacturing cost of the power supply circuit 2 can be reduced.

[0017] As can be understood, the charging device 1 may be a mobile battery and a charger, and the present application does not limit the specific form of the charging device 1.

[0018] As shown in FIG. 2, the power supply circuit 2 may include a rectifier module 21, a multi-port output control circuit 3 and a protocol chip 22.

[0019] The rectifier module 21 has an AC input terminal and a DC output terminal, and the AC input terminal of the rectifier module 21 can be connected to the commercial power port of the housing 11, and the DC output terminal of the rectifier module 21 is connected to the multi-port output control circuit 3.

[0020] For example, the rectifier module 21 may include a rectifier circuit (not shown), a filter circuit (not shown), and a voltage stabilization circuit (not shown). The rectifier circuit rectifies AC current to DC current, and the rectifier circuit may include, but is not limited to, a bridge rectifier circuit and a PWM (pulse width modulation) rectifier circuit. The filter circuit filters the pulsating DC current output from the rectifier circuit to smooth the waveform of the output DC current. The voltage stabilization circuit maintains the output voltage constant. The embodiments of the present application do not limit the specific form of the rectifier module 21.

[0021] As shown in FIG. 2, in one embodiment of the present application, the multi-port power control circuit 3 includes a power control module 31, a transformer module 32, and a controller 33; The output control module 31 includes an output port 31A, which is used for connection to an external device and is connected to the housing 11 and exposed from the housing 11 so as to be connected to the external device. The charging device 1 can be connected to a commercial power source to supply power to the external device via the output port 31A, and the external device can include, but is not limited to, a mobile phone, a tablet computer, and a smart watch. The output port 31A includes at least one of a USB-A port, a Micro USB port, a USB Type-C port, and a Lightning port.

[0022] The transformer module 32 boosts or lowers the DC current output from the rectifier module 21 and then supplies power to the output control module 31 so that the output port 31A outputs a corresponding voltage. Specifically, the protocol chip 22 may be connected to the output port 31A and the transformer module 32. After an external device is connected to the corresponding output port 31A, the protocol chip 22 exchanges information with the external device via the output port 31A, the content of which includes the remaining power of the external device and the rated charging power of the external device. The protocol chip 22 then outputs power parameter information corresponding to the external device to the transformer module 32, so that the transformer module 32 can output the required charging power for the external device, thereby matching the output power of the power supply circuit 2 with the external device. In another embodiment, the above process may be referred to as handshake communication between the charging device 1 and the external device.

[0023] For example, 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) protocol, the SCP (Super Charge Protocol) protocol, and the Mi Turbo Charge protocol. In other embodiments, the fast charging protocols supported by the protocol chip 22 may include other protocols and may be appropriately selected according to the application scope of the product. The fast charging mode in this application is a charging mode in which the output port 31A matches a fast charging protocol.

[0024] For ease of understanding, in order to meet the above-mentioned fast charging protocols and market needs, the output ports 31A in this application are all USB Type-C as an example.

[0025] The controller 33 is connected to the output control module 31 and controls the output control module 31 to turn on, so that the transformer module 32 can supply power to external equipment through the turned-on output control module 31.

[0026] In the embodiment of the present application, the multi-port output control circuit 3 may include N (N≥2) output control modules 31 and M (1≤M<N) transformer modules 32. Each output control module 31 includes an output port 31A. Each transformer module 32 is connected to at least two output control modules 31, and the controller 33 is connected to all of the N output control modules 31.

[0027] When at most M output ports 31A are connected to external equipment, 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 equipment in the fast charging mode through the output control module 31. Thereby, when at most M external equipment are simultaneously connected to M output ports 31A, the charging device 1 can fast charge each external equipment and improve the charging efficiency of each external equipment. And when the number of external equipment that requires charging by the user is at most M, the user does not need to find the corresponding output port 31A based on the operation manual or label. When the external equipment is connected to any output port 31A, the charging device 1 can fast charge the external equipment, thereby improving the user's convenience of use.

[0028] And because M<N, the number of transformer modules 32 is less than the number of output control modules 31. The transformer modules 32 of the charging device 1 are fewer, and the space occupied by the transformer modules 32 in the housing 11 is small. Thereby, the overall volume of the charging device 1 is small, and it is easier to carry and use the charging device 1. And because the number of transformer modules 32 is small, the overall cost of the charging device 1 is reduced.

[0029] 2 and 3, in a specific embodiment, each output control module 31 further includes a control subcircuit 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 a predetermined control subcircuit 311 to be turned on, so that the transformer module 32 supplies power to the output port 31A via the control subcircuit 311, so that the output port 31A can supply power to the external device.

[0030] As can be understood, the number of control sub-circuits 311 in the output control module 31 may be one, two, three, etc., and each control sub-circuit 311 may be connected to a different transformer module 32, so that each output port 31A can correspond to at least one transformer module 32. When at least one transformer module 32 does not supply power to the outside, the controller 33 controls the control sub-circuit 311 corresponding to the transformer module 32 to be turned on, 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 equipment, thereby improving the probability that the output port 31A can fast charge the external equipment, improving the user's charging experience, and improving the charging efficiency of the external equipment.

[0031] In one embodiment, when N=2 and M=1, the multi-port output control circuit 3 may include two output control modules 31 and one transformer module 32, and each output control module 31 may include one control sub-circuit 311, and both control sub-circuits 311 are connected to the transformer module 32. When one output port 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 turn on, so that the transformer module 32 can supply power to the external device in fast charging mode via the output control module 31.

[0032] As shown in 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, and each output control module 31 includes two control sub-circuits 311, each connected to the output port 31A and the controller 33, and each connected to the two transformer modules 32.

[0033] Specifically, any two of the four output ports 31A are designated as the first output port and the second output port, respectively, and when the first output port is connected to an external device, the controller 33 controls the output control module 31 corresponding to the first output port to be turned on, whereby one of the transformer modules 32 supplies power to the first output port via the output control module 31 so that the first output port can supply power to the external device in fast charging mode.

[0034] When the second output port is connected to an external device, the controller 33 controls the output control module 31 corresponding to the second output port to be turned on, so that the other transformer module 32 can supply power to the second output port via the output control module 31, so that the second output port can supply power to the external device in a fast charge mode. When at most two 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 a fast charge mode via the output control module 31.

[0035] As shown in FIGS. 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, and 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 (as shown in FIG. 4, from top to bottom, the first output control module, the second output control module, the third output control module, and the fourth output control module), and each of the first output control module and the fourth output control module has one control sub-circuit 311, and each of the second output control module and the third output control module has two control sub-circuits 311. 1, and the three transformer modules 32 are respectively a first transformer module, a second transformer module, and a third transformer module (from top to bottom as shown in FIG. 4, the first transformer module, the second transformer module, and the third transformer module), and the first transformer module is connected to the control sub-circuit 311 of the first output control module and one of the control sub-circuits 311 of the second output control module, the second transformer module is connected to the other control sub-circuit 311 of the second output control module and one of the control sub-circuits 311 of the third output control module, and the third transformer module is connected to the other control sub-circuit 311 of the third output control module and the control sub-circuit 311 of the fourth output control module.

[0036] As shown in Figures 2 and 4, exemplarily, three ports from top to bottom are selected from the four output ports 31A, and designated as the first output port, the second output port, and the third output port, respectively. When the first output port is connected to an external device, the controller 33 controls the output control module 31 corresponding to the first output port to be turned on, so that the first transformer module supplies power to the first output port via the output control module 31 so that the first output port can supply power to the external device in fast charging mode.

[0037] When the second output port is connected to an external device, the controller 33 controls the output control module 31 corresponding to the second output port to be turned on, so that the second transformer module can supply power to the second output port through the output control module 31 so that the second output port can supply power to the external device in fast charging mode.

[0038] When the third output port is connected to an external device, the controller 33 controls the output control module 31 corresponding to the third output port to be turned on, so that the third transformer module can supply power to the third output port through the output control module 31 so that the third output port can supply power to the external device in fast charging mode.

[0039] By analogy, when at most three output ports 31A are connected to external equipment, the controller 33 controls the output control module 31 corresponding to the output port 31A connected to the external equipment to turn on, so that the transformer module 32 can supply power to the external equipment in fast charging mode via the output control module 31.

[0040] As can be understood, in other embodiments, each transformer module 32 can be connected to three or four output control modules 31 at the same time, and different connection methods can be adapted by changing the control logic of the controller 33, and this is not specifically limited in the embodiments of the present application.

[0041] As shown in Figures 2 to 4, in a specific embodiment, the control sub-circuit 311 includes a first switch circuit 3111 and a second switch circuit 3112, and the first switch circuit 3111 has an input end connected to the transformer module 32 and an output end connected to the input end of the output port 31A. The second switch circuit 3112 has an input end connected to the controlled end of the first switch circuit 3111, an output end connected to the ground end of the output port 31A, and a controlled end connected to the controller 33.

[0042] When the controller 33 detects that the output port 31A is connected to the external equipment, the controller 33 sends an on signal to the second switch circuit 3112 of the output control module 31 corresponding to the output port 31A connected to the external equipment to turn on the second switch circuit 3112 and turn on the first switch circuit 3111, thereby enabling the transformer module 32 to 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 equipment in fast charging mode.

[0043] As shown in FIGS. 2 to 4, in one 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 terminal of the first switch element Q1 is connected to the input terminal of the first switch circuit 3111. The input terminal of the second switch element Q2 is connected to the output terminal of the first switch element Q1, the output terminal is connected to the output terminal of the first switch circuit 3111, and the controlled terminal is connected to the first switch element Q2. The first resistor R1 is connected to the output terminal and the controlled terminal of the first switch element Q1. The first diode D1 has a positive electrode connected to the input terminal of the first switch element Q1 and a negative electrode connected to the output terminal of the first switch element Q1. The second diode D2 has a positive electrode connected to the output terminal of the second switch element Q2 and a negative electrode connected to the input terminal of the second switch element Q2.

[0044] After the controller 33 controls the second switch circuit 3112 to be turned on, the transformer module 32 and the ground end of the output port 31A are connected sequentially via the first diode D1, the first resistor R1 and the second switch circuit 3112, a voltage drop occurs across the first resistor R1, and the first switch element Q1 and the second switch element Q2 are turned on, so that the output voltage of the transformer module 32 can be supplied to the output port 31A through the first switch element Q1 and the second switch element Q2, so that the output port 31A can supply power to external equipment.

[0045] Furthermore, the provision of the second diode D2 prevents the corresponding output port 31A from being charged when the corresponding transformer module 32 supplies power to the other output port 31A, reducing the risk of electric shock to the user and ensuring user safety, reducing the power loss of the transformer module 32, improving the utilization rate of electrical energy, and ensuring that the other output port 31A can supply power to external devices in fast charging mode.

[0046] As can be understood, the first switch element Q1 and the second switch element Q2 may each include at least one of a transistor (bipolar junction transistor, BJT), a field effect transistor (metal-oxide-semiconductor, MOS), and an electromagnetic relay, and the embodiments of the present application do not limit the specific forms of the first switch element Q1 and the second switch element Q2.

[0047] For example, the first switch element Q1 and the second switch element Q2 may both be field effect transistors, the first diode D1 may be a parasitic diode of the first switch element Q1, and the second diode D2 may be a parasitic diode of the second switch element Q2.

[0048] As shown in FIGS. 2 to 4, specifically, the first switch 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 switch circuit 3111, the positive electrode of the first parasitic diode is connected to the drain of the first PMOS transistor and the negative electrode is connected to the source of the first PMOS transistor, and the second switch element Q2 includes a second PMOS transistor and a second parasitic diode. a first resistor R1 connected to the source and gate of the first PMOS transistor; a second resistor R2 connected to the source and gate of the first PMOS transistor; a second resistor R3 connected to the source and gate of the first PMOS transistor; a second resistor R4 connected to the source and gate of the first PMOS transistor; a second resistor R5 connected to the source and gate of the first PMOS transistor; a second resistor R6 connected to the source and gate of the first PMOS transistor; a second resistor R7 connected to the source and gate of the first PMOS transistor; a second resistor R8 connected to the source and gate of the first PMOS transistor; a second resistor R9 connected to the drain and output terminal of the first PMOS transistor; a second resistor R1 connected to the drain and output terminal of the first PMOS transistor; a second resistor R1 connected to the source and gate of the first PMOS transistor; a second resistor R2 connected to the drain and output terminal of the first PMOS transistor; a second resistor R1 connected to the source and gate of the first PMOS transistor; a second resistor R2 connected to the drain and output terminal of the first PMOS transistor; a second resistor R3 connected to the source and gate of the first PMOS transistor; a second resistor R4 connected to the drain and output terminal of the second PMOS transistor; a second resistor R5 connected to the source and gate of the first PMOS transistor; a second resistor R6 connected to the drain and output terminal of the second PMOS transistor; a second resistor R7 connected to the source and gate of the first PMOS transistor; a second resistor R8 connected to the drain and output terminal of the second PMOS transistor; a second resistor R1 connected to the source and gate of the first PMOS transistor; a second resistor R1 connected to the drain and output terminal of the second PMOS transistor; a second resistor R2 ...3 connected to the drain and output terminal of the second PMOS transistor; a second resistor R4 connected to the drain and output terminal of the second PMOS transistor; a second resistor R1 connected to the source and gate of the first

[0049] After the controller 33 controls the second switch circuit 3112 to be turned on, the transformer module 32 and the output port 31A are connected sequentially through the first parasitic diode, the first resistor R1 and the second switch circuit 3112, so that a voltage drop occurs across the first resistor R1, the source voltage of the first PMOS transistor is higher than the gate voltage, the source voltage of the second PMOS transistor is higher than the gate voltage, the source and drain of the first PMOS transistor are connected, and the source and drain of the second PMOS transistor are connected, so that the first switch circuit 3111 is turned on, and the transformer module 32 can supply power to the output port 31A through the first PMOS transistor and the second PMOS transistor.

[0050] As can be understood, the first switch element Q1 may further include an NMOS transistor (N-Metal-Oxide-Semiconductor), and the second switch element Q2 may further include an NMOS transistor, and the description thereof will be omitted here.

[0051] As shown in FIGS. 2 to 4, in one embodiment, the second switch circuit 3112 includes a third switch element Q3 and a second resistor R2, the third switch element Q3 has an input end connected to the input end of the second switch circuit 3112, an output end connected to the output end of the second switch circuit 3112, and a controlled end connected to the controlled end of the second switch circuit 3112, and the second resistor R2 connected to the output end and controlled end of the third switch element Q3.

[0052] When detecting that the output port 31A is connected to an external device, the controller 33 sends an ON signal to the second switch circuit 3112 of the output control module 31 corresponding to the output port 31A connected to the external device, so that a voltage difference is generated across the second resistor R2, the third switch element Q3 is turned ON, and the gates of the first PMOS transistor and the second PMOS transistor are connected to the ground terminal of the output port 31A via the third switch element Q3. As a result, a voltage drop occurs across the first resistor R1, the first PMOS transistor and the second PMOS transistor are turned ON, and the output voltage of the transformer module 32 can be supplied to the output port 31A via the first PMOS transistor and the second PMOS transistor, so that the output port 31A can supply power to the external device.

[0053] It can be understood that the third switch element Q3 may include at least one of a transistor, a field effect transistor, and an electromagnetic relay, and the embodiment of the present application does not limit the specific form of the third switch element Q3.

[0054] For example, the third switch element Q3 may be a field-effect transistor. Specifically, the first switch element Q1 may be an NMOS transistor, with the drain of the NMOS transistor being the input end of the third switch element Q3, the source of the NMOS transistor being the output end of the third switch element Q3, and the gate of the NMOS transistor being the controlled end of the third switch element Q3. When the controller 33 sends an ON signal to the second switch circuit 3112, the ON signal causes a voltage drop across the second resistor R2, making the gate voltage of the NMOS transistor greater than the source voltage, connecting the source and drain of the NMOS transistor, and connecting the gates of the first PMOS transistor and the second PMOS transistor to the ground end of the output port 31A through the NMOS transistor, thereby turning on the first switch circuit 3111. Furthermore, the transformer module 32 can supply power to the output port 31A through the first PMOS transistor and the second PMOS transistor.

[0055] As can be understood, the third switch element Q3 may be a PMOS transistor, and the description thereof will be omitted here.

[0056] 2 to 4, the control sub-circuit 311 further includes a third resistor R3, which is connected to the controlled end of the first switch circuit 3111 and the input end of the second switch circuit 3112. The resistance of the third resistor R3 is several hundred kilohms. Therefore, the resistance of the circuit from the transformer module 32 to the ground end of the output port 31A via the first parasitic diode, the third resistor R3, and the third switch element Q3 is much greater than the resistance of the circuit from the transformer module 32 to the output end of the output port 31A via the first switch circuit 3111. As a result, the current in the circuit from the transformer module 32 to the ground end of the output port 31A via the first parasitic diode, the third resistor R3, and the third switch element Q3 is reduced, reducing the electrical energy loss in the circuit and reducing the electrical energy loss of the entire control sub-circuit 311. This in turn improves the electrical energy utilization rate of the multi-port output control circuit 3 and the charging device 1.

[0057] As can be understood, when 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 rationally distribute the output power of each output port 31A.

[0058] For example, when the same transformer module 32 is connected to two external equipment, the charging device 1 obtains the rated charging power and remaining power of the two external equipment through handshake communication, and controls the output power of the output port 31A connected to the external equipment with a high amount of power to be reduced, and controls the output power of the output port 31A connected to the external equipment with a low amount of power to be increased, thereby improving the charging efficiency of the charging device 1 when charging the external equipment with a low amount of power, and improving the charging efficiency of the charging device 1 when charging the external equipment, as well as improving the utilization rate of the electrical energy of the charging device 1.

[0059] 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, and when the charging device 1 detects that one external device is away from the output port 31A, it can control the transformer module 32 to supply power to the other external device in fast charging mode, thereby improving the charging efficiency of the charging device 1 when charging the other external device.

[0060] As can be understood, when the same transformer module 32 supplies power to at least two external devices, the power distribution method of the charging device 1 may be in other forms, and the embodiments of the present application do not specifically limit this.

[0061] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, the orientation or positional relationship represented by terms such as "upper", "lower", "left", and "right" is the orientation or positional relationship based on the illustration, and is only for explaining and simplifying the description of this application, and it is not intended to indicate or suggest that the mentioned device or element must have a specific orientation and be configured and operated in a specific orientation. It should be understood that the terms for explaining the positional relationship in the drawings are only used for exemplary explanations and should not be understood as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific situation.

[0062] The above are only preferred embodiments of this application and do not limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application should all be included within the protection scope of this application.

[0063] [Additional Item 1] Applied to a power supply circuit, including N (N≥2) output control modules each including an output port for connecting to an external device, including M (1≤M<N) transformer modules each connected to at least two of the output control modules, and a controller connected to each output control module to control the on / off of the output control module. When at most M external devices are connected to the output port simultaneously, the transformer module can supply power to the external device in a rapid charging mode by the output control module. A multi-port output control circuit characterized by this. [Additional Item 2] [Additional Item 2] Each of the output control modules further includes a control sub-circuit connected to the output port, the transformer module, and the controller. The multi-port output control circuit according to Additional Item 1, characterized by this. [Additional Item 3] When N=4 and M=2, each of the output control modules includes two of the control sub-circuits, each of which is connected to the output port and the controller, and each of which is connected to two of the transformer modules; The multi-port output control circuit described in Appendix 2 is characterized in that when at most two of the output ports are connected to the external equipment, the controller controls the corresponding output control module to be turned on, thereby allowing the transformer module to supply power to the external equipment in fast charging mode via the output control module. [Additional note 4] If 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 of the control sub-circuits; the second output control module and the third output control module each have two of the 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 the control sub-circuit of one of the second output control modules; the second transformer module is connected to the other of the control sub-circuits of the second output control module and to one of the control sub-circuits of the third output control module; the third transformer module is connected to the other of the control sub-circuits of the third output control module and the control sub-circuit of the fourth output control module; The multi-port output control circuit described in appendix 2, characterized in that when at most three of the output ports are connected to the external equipment, the controller controls the corresponding output control modules to be turned on, thereby allowing the transformer module to supply power to the external equipment in fast charging mode via the output control modules. [Additional note 5] The control subcircuit comprises: a first switch circuit having an input terminal connected to the transformer module and an output terminal connected to the input terminal of the output port; and a second switch circuit having an input end connected to a controlled end of the first switch circuit, an output end connected to a ground end of the output port, and a controlled end connected to the controller. [Additional note 6] The first switch circuit is a first switch element having an input terminal connected to the input terminal of the first switch circuit; a second switch element having an input terminal connected to the output terminal of the first switch element, an output terminal connected to the output terminal of the first switch circuit, and a controlled terminal connected to the controlled terminal of the first switch element and the controlled terminal of the first switch circuit; a first resistor connected to the output terminal and the controlled terminal of the first switch element; a first diode having a positive electrode connected to the input terminal of the first switch element and a negative electrode connected to the output terminal of the first switch element; a second diode having a positive electrode connected to the output terminal of the second switch element and a negative electrode connected to the input terminal of the second switch element. [Additional note 7] The first switch circuit is a first switch element including a first PMOS transistor and a first parasitic diode, the drain of the first PMOS transistor being connected to the input terminal of the first switch circuit, the positive electrode of the first parasitic diode being connected to the drain of the first PMOS transistor, and the negative electrode of the first parasitic diode being connected to the source of the first PMOS transistor; a second switch element including a second PMOS transistor and a second parasitic diode, the source of the second PMOS transistor being connected to the drain of the first PMOS transistor, the drain of the second PMOS transistor being connected to the output terminal of the first switch circuit, the gate of the second PMOS transistor being connected to the gate of the first PMOS transistor, the positive electrode of the second parasitic diode being connected to the drain of the second PMOS transistor, and the negative electrode of the second parasitic diode being connected to the source of the second PMOS transistor; and a first resistor connected to the source and gate of the first PMOS transistor. [Additional note 8] The second switch circuit is a third switch element having an input terminal connected to the input terminal of the second switch circuit, an output terminal connected to the output terminal of the second switch circuit, and a controlled terminal connected to the controlled terminal of the second switch circuit; and a second resistor connected to the output end and the controlled end of the third switch element. [Additional note 9] The control subcircuit comprises: 6. The multi-port output control circuit according to claim 5, further comprising a third resistor connected to the controlled end of the first switch circuit and the input end of the second switch circuit. [Additional Note 10] The multi-port output control circuit described in appendix 1, characterized in that when more than M output ports are connected to the external equipment, at least one of the transformer modules supplies power to the external equipment through at least two of the output control modules. [Additional Note 11] a rectifier module having an AC input terminal and a DC output terminal, the AC input terminal being connected to a commercial power source; The multi-port output control circuit according to any one of appendixes 1 to 10, wherein an input terminal of the transformer module is connected to a DC output terminal of the rectifier module; a protocol chip connected to the transformer module and the output port. [Additional Note 12] a housing having a mains power port; a circuit board provided within the housing; and the power supply circuit according to appended claim 11, which is provided on the circuit board, the AC input terminal of the rectifier module being connected to the commercial power port, and the output port being provided in the housing and exposed. [Explanation of symbols]

[0064] 1 Charging device 11. Housing 12 Circuit Board 2 Power circuit 21 Rectification 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 2nd resistor R3 3rd resistor D1 First diode D2 Second diode

Claims

1. Applied to power supply circuits, N (N≧2) output control modules each including an output port for connection to external equipment; M (1≦M<N) transformer modules, each connected to at least two of the output control modules; a controller connected to each of the output control modules to control the on / off of the output control modules; When at most M external devices are connected to the output ports simultaneously, the transformer module is capable of supplying power to the external devices in a fast charging mode via the output control module.

2. Each of the output control modules comprises:

10. The multi-port output control circuit of claim 1, further comprising a control subcircuit coupled to said output ports, said transformer module, and said controller.

3. When N=4 and M=2, each of the output control modules includes two of the control sub-circuits, each of which is connected to the output port and the controller, and each of which is connected to two of the transformer modules; 3. The multi-port output control circuit of claim 2, wherein when at most two of the output ports are connected to the external equipment, the controller controls the corresponding output control module to turn on, thereby allowing the transformer module to supply power to the external equipment in a fast charging mode via the output control module.

4. 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 of the control sub-circuits; the second output control module and the third output control module each have two of the 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 the control sub-circuit of one of the second output control modules; the second transformer module is connected to the other of the control sub-circuits of the second output control module and to one of the control sub-circuits of the third output control module; the third transformer module is connected to the other of the control sub-circuits of the third output control module and the control sub-circuit of the fourth output control module; 3. The multi-port output control circuit of claim 2, wherein when at most three of the output ports are connected to the external equipment, the controller controls the corresponding output control modules to turn on, thereby allowing the transformer module to supply power to the external equipment in a fast charging mode via the output control modules.

5. The control subcircuit comprises: a first switch circuit having an input terminal connected to the transformer module and an output terminal connected to the input terminal of the output port; 3. The multi-port output control circuit according to claim 2, further comprising: a second switch circuit having an input terminal connected to the controlled terminal of the first switch circuit, an output terminal connected to the ground terminal of the output port, and a controlled terminal connected to the controller.

6. The first switch circuit a first switch element having an input terminal connected to the input terminal of the first switch circuit; a second switch element having an input terminal connected to the output terminal of the first switch element, an output terminal connected to the output terminal of the first switch circuit, and a controlled terminal connected to the controlled terminal of the first switch element and the controlled terminal of the first switch circuit; a first resistor connected to the output terminal and the controlled terminal of the first switch element; a first diode having a positive electrode connected to the input terminal of the first switch element and a negative electrode connected to the output terminal of the first switch element; 6. The multi-port output control circuit according to claim 5, further comprising: a second diode having a positive electrode connected to the output terminal of the second switch element and a negative electrode connected to the input terminal of the second switch element.

7. The first switch circuit a first switch element including a first PMOS transistor and a first parasitic diode, the drain of the first PMOS transistor being connected to the input terminal of the first switch circuit, the positive electrode of the first parasitic diode being connected to the drain of the first PMOS transistor, and the negative electrode of the first parasitic diode being connected to the source of the first PMOS transistor; a second switch element including a second PMOS transistor and a second parasitic diode, the source of the second PMOS transistor being connected to the drain of the first PMOS transistor, the drain of the second PMOS transistor being connected to the output terminal of the first switch circuit, the gate of the second PMOS transistor being connected to the gate of the first PMOS transistor, the positive electrode of the second parasitic diode being connected to the drain of the second PMOS transistor, and the negative electrode of the second parasitic diode being connected to the source of the second PMOS transistor; 6. The multi-port output control circuit of claim 5, further comprising: a first resistor connected to the source and gate of the first PMOS transistor.

8. The second switch circuit is a third switch element having an input terminal connected to the input terminal of the second switch circuit, an output terminal connected to the output terminal of the second switch circuit, and a controlled terminal connected to the controlled terminal of the second switch circuit; 6. The multi-port output control circuit according to claim 5, further comprising: a second resistor connected to the output end and the controlled end of the third switch element.

9. The control subcircuit comprises:

6. The multi-port output control circuit according to claim 5, further comprising a third resistor connected to the controlled end of the first switch circuit and the input end of the second switch circuit.

10. 2. The multi-port output control circuit of claim 1, wherein when more than M output ports are connected to the external equipment, at least one of the transformer modules powers the external equipment through at least two of the output control modules.

11. a rectifier module having an AC input terminal and a DC output terminal, the AC input terminal being connected to a commercial power source; The multi-port output control circuit according to any one of claims 1 to 10, wherein the input terminal of the transformer module is connected to the DC output terminal of the rectifier module; a protocol chip connected to the transformer module and the output port.

12. a housing having a mains power port; a circuit board provided within the housing; and the power supply circuit according to claim 11, which is provided on the circuit board, the AC input terminal of the rectifier module being connected to the commercial power port, and the output port being provided on the housing and exposed.

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