Digital switching power supply for control loop

Abstract

The utility model relates to the technical field of charging power supplies, in particular to a digital switching power supply for a control loop. The digital switching power supply comprises a power module which is used for adaptively outputting an adjustable voltage according to a load; the voltage detection module is connected with the power module and is used for detecting the voltage of the power module; the current detection module is connected with the power module and is used for carrying out current detection on the power module; and the control module is respectively connected with the power module, the voltage detection module and the current detection module and is used for controlling the power module to output corresponding voltage based on an input instruction, and the problem that a digital power supply in the prior art cannot simultaneously realize voltage boosting and voltage reducing functions is solved.

Description

Technical Field

[0001] This utility model relates to the field of charging power supply technology, and in particular to a digital switching power supply for control loop. Background Technology

[0002] Buck or Boost DC converters typically employ a hardware structure of controller + power devices + feedback loop, using chopping to achieve voltage boost or buck conversion. However, they only offer boost or buck functionality, and their input / output range is limited by the hardware, making them unsuitable for various battery charging applications.

[0003] Chinese Patent Publication No. CN203838586U discloses a high-speed, wide-range, high-precision programmable power supply for multi-electrode active optoelectronic devices. It includes a digital control unit composed of a high-speed logic device FPGA, a high-speed digital-to-analog converter (DAC), and a high-speed operational voltage amplifier circuit. The output of the DAC is connected in series with the input of the operational voltage amplifier circuit to form a digital-to-analog converter amplifier circuit. Multiple outputs of the digital control unit are connected to the inputs of multiple digital-to-analog converter amplifier circuits, and the outputs of these circuits are connected to the inputs of multiple active optoelectronic devices. This invention overcomes the shortcomings of conventional power supplies, featuring a wide output voltage range, high accuracy, and fast switching speed, making it an essential driving source for static and dynamic testing of multi-electrode tunable lasers. Therefore, it is evident that existing digital power supplies cannot simultaneously achieve boost and buck functions. Utility Model Content

[0004] Therefore, this utility model provides a digital switching power supply for control loops to overcome the problem that existing digital power supplies cannot simultaneously achieve boost and buck functions.

[0005] To achieve the above objectives, this utility model provides a digital switching power supply for a control loop, comprising:

[0006] A power module that adaptively outputs an adjustable voltage based on the load;

[0007] A voltage detection module, which is connected to the power module, is used to detect the voltage of the power module;

[0008] A current detection module, which is connected to the power module, is used to detect the current of the power module;

[0009] A control module, which is connected to the power module, voltage detection module and current detection module respectively, is used to control the power module to output the corresponding voltage based on input commands.

[0010] Furthermore, the power module includes a power circuit component, a power loop circuit, and a protection circuit, comprising a first power circuit component and a second power circuit component, wherein the first power component and the second power component are connected in parallel.

[0011] Furthermore, the first power circuit assembly includes a first power circuit and a first drive circuit, wherein the first power circuit and the first drive circuit are connected in series.

[0012] Furthermore, the first power circuit is used to boost the input voltage, and the first drive circuit is used to determine the transmission direction of the output voltage of the first power circuit according to the control command of the control module.

[0013] Furthermore, the second power circuit assembly includes a second power circuit and a second drive circuit, wherein the second power circuit is connected in series with the second drive circuit.

[0014] Furthermore, the second drive circuit is connected in series with the first drive circuit; the second power circuit is used to transmit the output voltage of the first power circuit to the load, and the second drive circuit is used to determine the transmission voltage of the power circuit according to the control command of the control module.

[0015] Furthermore, the power circuit is connected in series with the first power component and the second power component respectively, so as to transmit the output voltage of the first power circuit component to the second drive circuit.

[0016] Furthermore, the protection circuit is connected in series with the second power circuit of the second power circuit assembly to protect the second power circuit when the second power circuit outputs voltage through the second path.

[0017] Compared with the prior art, the beneficial effect of this utility model is that by adopting the Buck+Boost structure, it realizes the boost and buck processing of the input voltage, and realizes the constant current and constant voltage output of the DC / DC conversion circuit. It can be applied to power supplies for charging batteries of different specifications, or applications that require a wide range of input and output voltages. The output voltage range can be 0V to a set value, and the maximum voltage of the set value is only limited by the power device and current limit value. Attached Figure Description

[0018] Figure 1 This is a logic block diagram of a digital switching power supply used for controlling a loop according to an embodiment of the present invention;

[0019] Figure 2 This is a circuit diagram of the power module according to an embodiment of the present invention;

[0020] Figure 3This is a circuit diagram of the control module in an embodiment of the present invention;

[0021] Figure 4 This is a circuit diagram of the voltage detection module according to an embodiment of the present invention;

[0022] Figure 5 This is a circuit diagram of the current detection module according to an embodiment of the present invention;

[0023] In the diagram, 1-power module, 2-voltage detection module, 3-current detection module, 4-control module, 11-first power circuit, 12-first drive circuit, 13-second power circuit, 14-second drive circuit, 15-power loop circuit, 16-protection circuit, 17-first interface, 18-second interface. Detailed Implementation

[0024] To make the objectives and advantages of this utility model clearer, the utility model will be further described below with reference to the embodiments; it should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0025] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0026] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0027] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Please see Figure 1 As shown, it is a logic block diagram of a digital switching power supply used for controlling the loop in an embodiment of this utility model;

[0029] This utility model embodiment is used for a digital switching power supply for controlling a loop, including:

[0030] Power module 1, which is used to adaptively output an adjustable voltage according to the load;

[0031] Voltage detection module 2, which is connected to the power module, is used to detect the voltage of the power module;

[0032] A current detection module 3 is connected to the power module and is used to detect the current of the power module.

[0033] The control module 4 is connected to the power module, voltage detection module and current detection module respectively, and is used to control the power module to output the corresponding voltage based on the input command.

[0034] In this embodiment of the utility model, the control module adopts an MCU control chip, and the MCU control chip is a Beiyi Innovation GD series chip.

[0035] By replacing the dedicated DC / DC controller with an MCU, it enables multi-scenario applications of input and output performance, thereby achieving intelligent control of input voltage and current, adjustable output voltage and current, and switching between constant voltage and constant current modes, meeting the needs of multiple operating conditions. Through the software + hardware feedback loop, stable operation in multiple scenarios is guaranteed. The controller code is standardized, and the corresponding performance design can be achieved by simply setting the interface functions in different application scenarios.

[0036] Please see Figure 2 The diagram shown is a circuit diagram of the power module according to an embodiment of this utility model.

[0037] Specifically, the power module 1 includes:

[0038] A power circuit assembly, comprising a first power circuit assembly and a second power circuit assembly, wherein the first power assembly and the second power assembly are connected in parallel.

[0039] The first power circuit component includes a first power circuit 11 and a first drive circuit 12. The first power circuit 11 and the first drive circuit 12 are connected in series. The first power circuit 11 is used to boost the input voltage, and the first drive circuit 12 is used to determine the transmission direction of the output voltage of the first power circuit 11 according to the control command of the control module 4.

[0040] The second power circuit assembly includes a second power circuit 13 and a second drive circuit 14. The second power circuit 13 is connected in series with the second drive circuit 14, and the second drive circuit 14 is electrically connected in series with the first drive circuit 12. The second power circuit 13 is used to transmit the output voltage of the first power circuit 12 to the load, and the second drive circuit 14 is used to determine the transmission voltage of the power circuit according to the control command of the control module.

[0041] The power circuit 15 is connected in series with the first power component and the second power component respectively, so as to transmit the output voltage of the first power circuit component to the second drive circuit.

[0042] Protection circuit 16 is connected in series with the second power circuit of the second power circuit assembly to protect the second power circuit when the second power circuit outputs voltage through the second path.

[0043] The first interface 17 is connected to the first power circuit 11 and is used to input voltage to the first power circuit 11;

[0044] The second interface 18 is connected to the second power circuit 13 to output voltage to the load.

[0045] This invention utilizes a Buck+Boost structure to achieve both voltage boosting and bucking of the input voltage, enabling constant current and constant voltage output from the DC / DC converter circuit. It can be applied to power supplies for charging batteries of different specifications, or to applications requiring a wide input and output voltage range. The output voltage range can be 0V to a set value, and the maximum voltage of the set value is limited only by the power device and current limits.

[0046] Please see Figure 3 The diagram shown is a circuit diagram of the control module of an embodiment of this utility model.

[0047] In this embodiment of the utility model, the control module 4 controls the first drive circuit 11 in the power module 1 to connect mains power or other electrical energy through the first interface 17 based on load demand. The power is then transmitted to the load or to the second power circuit 13 through a boost or buck operation. Control signals are sent to the first drive circuit 12 and the second drive circuit 14 respectively to control the transmitted voltage, so that the power module 1 outputs voltage according to the load demand.

[0048] Please see Figure 4 The diagram shown is a circuit diagram of the voltage detection module according to an embodiment of this utility model.

[0049] In this embodiment of the utility model, the voltage detection module is used to transmit an unqualified voltage signal to the control module 4 when the voltage signal of the power module 1 is unqualified. The control module 4 controls the protection circuit 16 to protect the power module 1 based on the unqualified voltage signal.

[0050] Please see Figure 5 The diagram shown is a circuit diagram of the current detection module in an embodiment of this utility model.

[0051] In this embodiment of the utility model, the current detection module is used to transmit an unqualified current signal to the control module 4 when the current signal of the power module 1 is unqualified. The control module 4 controls the protection circuit 16 to protect the power module 1 based on the unqualified current signal.

[0052] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

[0053] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A digitally controlled switching power supply for a control loop, characterized by The application relates to an adjustable voltage output device, which comprises a power module, a voltage detection module, a current detection module and a control module. The power module is used to output adjustable voltage according to load self-adaption. The voltage detection module is connected with the power module and used to detect voltage of the power module. The current detection module is connected with the power module and used to detect current of the power module. The control module is connected with the power module, the voltage detection module and the current detection module respectively and used to control the power module to output corresponding voltage based on input instruction.

2. The digitally controlled switching power supply for a control loop according to claim 1, characterized in that, The power module comprises a power circuit component, a power loop circuit and a protection circuit, which comprises a first power circuit component and a second power circuit component.

3. The digitally controlled switching power supply for a control loop of claim 2, wherein, The first power circuit component is connected with the second power circuit component in parallel.

4. The digitally controlled switching power supply for a control loop according to claim 3, characterized in that, The first power circuit component comprises a first power circuit and a first driving circuit, and the first power circuit is connected with the first driving circuit in series.

5. The digitally controlled switching power supply for a control loop according to claim 3, wherein, The first power circuit is used to boost input voltage, and the first driving circuit is used to determine transmission direction of output voltage of the first power circuit according to control instruction of the control module.

6. The digitally controlled switching power supply for a control loop according to claim 5, characterized in that, The second power circuit component comprises a second power circuit and a second driving circuit, and the second power circuit is connected with the second driving circuit in series.

7. The digitally controlled switching power supply for a control loop of claim 5, wherein, The second driving circuit is connected with the first driving circuit in series, the second power circuit is used to transmit output voltage of the first power circuit to load, and the second driving circuit is used to determine transmission voltage of the power loop according to control instruction of the control module.

8. The digitally controlled switching power supply for a control loop of claim 2, wherein, The power loop circuit is connected with the first power circuit component and the second power circuit component in series respectively and used to transmit output voltage of the first power circuit component to the second driving circuit. The protection circuit is connected with the second power circuit of the second power circuit component in series and used to protect the second power circuit when the second power circuit outputs voltage through a second passage.

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