Charger output power control system

Abstract

The utility model relates to a charger output power control system, which is applied to the technical field of chargers, and comprises a voltage switch and control circuit and a step-down circuit, the voltage switch and control circuit is used for receiving a voltage control signal sent by an MCU (Microprogrammed Control Unit), and the input voltage of the step-down circuit is regulated and controlled according to the voltage control signal; therefore, the output voltage of the step-down circuit is controlled, regulation and control of the output power are realized, the output power of the charger can be regulated and controlled freely, and even if a plurality of charger interfaces are used together, full power of each interface can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of chargers, in particular to a charger output power control system. Background Art

[0002] In the prior art, a charging head generally has two output ports, both of which can be type-c, both USB, or one type-c and one USB. When the two interfaces are plugged in at the same time, there is no way to ensure that both interfaces are at full power, that is, the power of the existing charger output port cannot be freely adjusted. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a charger output power control system to solve the problem in the prior art that the power of the charger output port cannot be freely adjusted.

[0004] The utility model provides a charger output power control system, the system comprising:

[0005] MCU: used to output voltage control signals to the voltage switch and control circuit to achieve circuit output voltage regulation;

[0006] Voltage switch and control circuit: used for receiving the voltage control signal sent by the MCU, regulating the input voltage of the step-down circuit according to the voltage control signal, thereby controlling the output voltage of the step-down circuit;

[0007] Buck circuit: used to adjust its output voltage according to the input voltage and the turns ratio of the coil;

[0008] AC to DC circuit: used to convert the alternating current input from the power supply into direct current and output it to the step-down circuit.

[0009] Preferably,

[0010] The AC to DC circuit includes a transformer and a rectifier circuit;

[0011] The transformer is used to convert the input high voltage of the power supply into the input low voltage, and output the stepped-down voltage waveform to the rectifier circuit;

[0012] The rectifier circuit is used to convert the stepped-down alternating current into constant direct current.

[0013] Preferably,

[0014] The AC to DC circuit also includes a filter circuit;

[0015] The filter circuit is used to filter the stepped-down input voltage and output the filtered voltage to the rectifier circuit.

[0016] Preferably,

[0017] The AC to DC circuit also includes a voltage stabilizing circuit;

[0018] The voltage stabilizing circuit is used to stabilize the voltage of the direct current output by the rectifier circuit and output it to the step-down circuit.

[0019] Preferably,

[0020] The step-down circuit comprises an input side circuit and an output side circuit, wherein the input side circuit and the output side circuit are connected via a voltage transformer;

[0021] The input side circuit is also connected to the voltage switch and the control circuit.

[0022] Preferably,

[0023] The MCU adopts a STM8S207CBT6 microcontroller.

[0024] Preferably,

[0025] The voltage transformer comprises a plurality of high-voltage sides, and the plurality of high-voltage sides realize switch combination through the voltage switch and the control signal of the control circuit, thereby realizing the regulation of the voltage at the input side of the voltage transformer.

[0026] The technical solution provided by the embodiment of the utility model may include the following beneficial effects:

[0027] The present application sets a voltage switch and control circuit and a step-down circuit, receives a voltage control signal sent by the MCU through the voltage switch and control circuit, adjusts the input voltage of the step-down circuit according to the voltage control signal, thereby controlling the output voltage of the step-down circuit to achieve output power regulation. The output power of the charger can be freely adjusted, and even if multiple charger interfaces are used together, full power can be guaranteed for each interface.

[0028] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0030] Figure 1 is a system schematic diagram of a charger output power control system according to an exemplary embodiment;

[0031] Figure 2is a schematic diagram of an AC to DC circuit principle according to another exemplary embodiment;

[0032] Figure 3 is a schematic diagram showing a buck circuit principle according to another exemplary embodiment;

[0033] Figure 4 is a schematic diagram showing a voltage switch and a control circuit principle according to another exemplary embodiment;

[0034] Figure 5 is an overall circuit diagram of a charger output power control system according to another exemplary embodiment.

[0035] In the figure: 1-MCU, 2-voltage switch and control circuit, 3-step-down circuit, 4-AC to DC circuit. DETAILED DESCRIPTION

[0036] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0037] Embodiment 1

[0038] Figure 1 is a system schematic diagram of a charger output power control system according to an exemplary embodiment, the system comprising:

[0039] MCU1: used to output voltage control signals to the voltage switch and control circuit 2 to achieve circuit output voltage regulation;

[0040] Voltage switch and control circuit 2: used for receiving the voltage control signal sent by the MCU1, and regulating the input voltage of the step-down circuit 3 according to the voltage control signal, thereby controlling the output voltage of the step-down circuit 3;

[0041] Buck circuit 3: used to adjust its output voltage according to the input voltage and the turns ratio of the coil;

[0042] AC to DC circuit 4: used for converting the alternating current input by the power supply into direct current and outputting it to the step-down circuit 3;

[0043] It is understandable that if Figure 5As shown, the present application sets a voltage switch and control circuit 2 and a step-down circuit 3, and sends a voltage control signal to the voltage switch and control circuit 2 through MCU1. After the voltage switch and control circuit 2 receives the voltage control signal sent by MCU1, it adjusts the input voltage of the input side of the step-down circuit 3 according to the voltage control signal, thereby controlling the output voltage of the step-down circuit 3 to achieve output power regulation. The output power of the charger can be freely adjusted, and even if multiple charger interfaces are used together, full power can be guaranteed for each interface.

[0044] Preferably,

[0045] The AC to DC circuit 4 includes a transformer and a rectifier circuit;

[0046] The transformer is used to convert the input high voltage of the power supply into the input low voltage, and output the stepped-down voltage waveform to the rectifier circuit;

[0047] The rectifier circuit is used to convert the stepped-down alternating current into a constant direct current;

[0048] Preferably,

[0049] The AC to DC circuit 4 also includes a filter circuit;

[0050] The filter circuit is used to filter the stepped-down input voltage and output the filtered voltage to the rectifier circuit.

[0051] Preferably,

[0052] The AC to DC circuit 4 also includes a voltage stabilizing circuit;

[0053] The voltage stabilizing circuit is used to stabilize the voltage of the direct current output by the rectifier circuit and output it to the step-down circuit 3;

[0054] It is understandable that if Figure 2 As shown, before rectification, the AC to DC power supply usually needs to add an input filter circuit to remove high-frequency noise and interference in the input AC power, so as to ensure stable DC output and reduce interference to subsequent circuits; the AC power input of the power supply is converted into DC power through the rectifier circuit. The rectifier bridge is usually composed of four diodes, which can convert the positive half-cycle and negative half-cycle of the AC power into forward and reverse DC power respectively; finally, a stable voltage is output through the voltage stabilizing circuit. The voltage stabilizing circuit is usually composed of a voltage stabilizer, and the output voltage can be adjusted through feedback.

[0055] Preferably,

[0056] The step-down circuit 3 includes an input side circuit and an output side circuit, and the input side circuit and the output side circuit are connected via a voltage transformer;

[0057] The input side circuit is also connected to the voltage switch and control circuit 2 .

[0058] Preferably,

[0059] The MCU1 adopts a STM8S207CBT6 microcontroller;

[0060] It is understood that the STM8S207CBT6 model device is an MCU microcontroller, STM8S207xx, STM8S208xx series products. For effective power management, the application can be placed in one of four different low-power modes, and you can configure each mode to obtain the best compromise between the lowest power consumption, the fastest startup time and the available wake-up sources. Wait mode: In this mode, the CPU is stopped, but the peripherals are still running. The wake-up is performed by an internal or external interrupt or reset. Active stop mode with regulator: In this mode, the CPU and peripheral clocks are stopped, and internal wake-ups (AWU) are generated at programmable intervals through automatic wake-up. The main voltage regulator remains powered, so the current consumption is higher than in active stop mode, the regulator is turned off, but the wake-up time is faster. The wake-up is triggered by an internal AWU interrupt, an external interrupt or a reset. Active stop mode with regulator off: This mode is the same as active stop mode with regulator on, except that the main voltage regulator is powered off, so the wake-up time is slower. Stop mode: In this mode, the microcontroller uses minimal power, the CPU and peripheral clocks are stopped, the main voltage regulator is turned off, and wake-up is triggered by an external event or reset.

[0061] Preferably,

[0062] The voltage transformer comprises a plurality of high-voltage sides, and the plurality of high-voltage sides realize switch combination through the voltage switch and the control signal of the control circuit, thereby realizing the regulation of the voltage at the input side of the voltage transformer;

[0063] It is understandable that if Figure 3 And attached Figure 4As shown, the high-voltage side of the voltage transformer includes two parts. For ease of understanding, an example is given: if the output power of the step-down circuit 3 when the first part of the high-voltage side is turned on alone is 20w, and the output power of the step-down circuit 3 when the second part of the high-voltage side is turned on alone is 15w, when the two parts of the high-voltage side work together, the output power of the step-down circuit 3 is 35w; in fact, the high-voltage side can have more than two parts, and can be multiple parts, each part corresponding to a voltage. This is because the output voltage of the step-down voltage 3 is related to the input side voltage, so regulating the input side voltage can regulate the output side voltage, thereby regulating the output power, and controlling the switches of several parts on the high-voltage side of the step-down circuit 3 through the voltage switch and the control circuit 2, regulating the high-voltage side combination of the step-down circuit 3, thereby selecting different input side voltages, and each input side voltage corresponds to an output voltage, so that the user can choose the desired output power size according to their own needs.

[0064] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0065] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0066] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0067] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0068] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0069] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0070] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0072] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A charger output power control system, characterized in that: The system comprises: MCU: used to output voltage control signals to the voltage switch and control circuit to achieve circuit output voltage regulation; Voltage switch and control circuit: used to receive the voltage control signal sent by the MCU, and adjust the input voltage of the buck circuit according to the voltage control signal, thereby controlling the output voltage of the buck circuit; Buck circuit: used to adjust its output voltage according to the input voltage and the turns ratio of the coil; AC to DC circuit: used to convert the alternating current input from the power supply into direct current and output it to the step-down circuit.

2. The system according to claim 1, characterized in that The AC to DC circuit includes a transformer and a rectifier circuit; The transformer is used to convert the input high voltage of the power supply into the input low voltage, and output the stepped-down voltage waveform to the rectifier circuit; The rectifier circuit is used to convert the stepped-down alternating current into constant direct current.

3. The system according to claim 2, characterized in that The AC to DC circuit also includes a filter circuit; The filter circuit is used to filter the stepped-down input voltage and output the filtered voltage to the rectifier circuit.

4. The system according to claim 3, characterized in that The AC to DC circuit also includes a voltage stabilizing circuit; The voltage stabilizing circuit is used to stabilize the voltage of the direct current output by the rectifier circuit and output it to the step-down circuit.

5. The system according to claim 1, characterized in that The step-down circuit comprises an input side circuit and an output side circuit, wherein the input side circuit and the output side circuit are connected via a voltage transformer; The input side circuit is also connected to the voltage switch and the control circuit.

6. The system according to claim 1, characterized in that The MCU adopts a STM8S207CBT6 microcontroller.

7. The system according to claim 5, characterized in that The voltage transformer comprises a plurality of high-voltage sides, and the plurality of high-voltage sides realize switch combination through the voltage switch and the control signal of the control circuit, thereby realizing the regulation of the voltage at the input side of the voltage transformer.

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