Voltage regulating circuit, control method thereof, and voltage regulating device

Abstract

This application relates to a voltage regulating circuit and its control method, as well as a voltage regulating device, belonging to the field of electronic technology. The voltage regulating circuit includes: an input detection module, a first switching transistor module, a second switching transistor module, a third switching transistor module, an energy storage module, and an output module. The first terminal of the input detection module is electrically connected to the first terminal of the first switching transistor module. The second terminal of the first switching transistor module is electrically connected to the first terminal of the second switching transistor module and the first terminal of the energy storage module. The second terminal of the energy storage module is electrically connected to the first terminal of the third switching transistor module and the first terminal of the output module. The second terminal of the output module is electrically connected to the second terminal of the third switching transistor module, the second terminal of the second switching transistor module, and the second terminal of the input detection module. This broadens the selection of voltage regulation methods, making the voltage regulating circuit more versatile and flexible.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and in particular to a voltage regulating circuit and its control method and device. Background Technology

[0002] Currently, direct current-to-direct current (DC-DC) conversion technology plays a crucial role in many important industrial, agricultural, and infrastructure fields, including automobiles, home appliances, new energy, power supply, and power transmission, and is an indispensable part of the development of modern power electronics. Furthermore, with the development of new energy technologies such as photovoltaics, wind power, and battery energy storage, multi-source power supply and grid connection technologies have become important research directions. However, existing DC-DC converters suffer from problems such as complex structure, large size, and poor versatility and flexibility. Summary of the Invention

[0003] This application provides a voltage regulation circuit, control method, and device to solve the problems of existing DC-DC converters, such as complex structure, large size, poor versatility, and lack of flexibility.

[0004] In a first aspect, this application provides a voltage regulation circuit, including: an input detection module, a first switching transistor module, a second switching transistor module, a third switching transistor module, an energy storage module, and an output module;

[0005] The first end of the input detection module is electrically connected to the first end of the first switching module, the second end of the first switching module is electrically connected to the first end of the second switching module and the first end of the energy storage module, the second end of the energy storage module is electrically connected to the first end of the third switching module and the first end of the output module, and the second end of the output module is electrically connected to the second end of the third switching module, the second end of the second switching module and the second end of the input detection module.

[0006] The input detection module is used to detect the reference voltage signal value of the voltage regulation circuit;

[0007] When the reference voltage signal value is greater than the preset reference voltage threshold, the voltage regulation circuit enters the boost mode, the first switching module is turned on, the second switching module is turned off, and the third switching module is used to perform boost regulation according to the reference voltage signal value and the output signal of the output module.

[0008] When the reference voltage signal value is less than the preset reference voltage threshold, the voltage regulation circuit enters the buck mode, the third switching module is turned off, and the first switching module and the second switching module are used to perform buck regulation according to the reference voltage signal value and the output signal of the output module.

[0009] Optionally, when the reference voltage signal value is equal to a preset reference voltage threshold, the voltage regulation circuit enters the voltage regulation output mode, the first switching transistor module is turned on, and the second switching transistor module and the third module are turned off;

[0010] The first switching transistor module is used to transmit the input signal of the voltage regulation circuit to the energy storage module;

[0011] The energy storage module is used to provide electrical energy signals to the output module based on the input signal;

[0012] The output module is used to generate the output signal based on the electrical energy signal, and the voltage value of the output signal is equal to the voltage value of the input signal.

[0013] Optionally, the first switching module includes: a first switching transistor;

[0014] The first end of the first switching transistor is electrically connected to the first end of the input detection module, and the second end of the first switching transistor is electrically connected to the first end of the second switching transistor module and the first end of the energy storage module.

[0015] Optionally, the second switching module includes: a second switching transistor;

[0016] The first end of the second switch is electrically connected to the second end of the first switch module and the first end of the energy storage module, and the second end of the second switch is electrically connected to the second end of the output module, the second end of the third switch module and the second end of the input detection module.

[0017] Optionally, the third switching module includes: a third switching transistor;

[0018] The first end of the third switch is electrically connected to the second end of the energy storage module and the first end of the output module, and the second end of the third switch is electrically connected to the second end of the output module, the second end of the second switch module, and the second end of the input detection module.

[0019] Optionally, the energy storage module includes an energy storage inductor;

[0020] The first end of the energy storage inductor is electrically connected to the second end of the first switching module and the first end of the second switching module, and the second end of the energy storage inductor is electrically connected to the first end of the third switching module and the first end of the output module.

[0021] Optionally, the output module includes: a diode and an output capacitor;

[0022] The anode of the diode is electrically connected to the second terminal of the energy storage inductor and the first terminal of the third switching module, and the cathode of the diode is electrically connected to the first terminal of the output capacitor.

[0023] The second terminal of the output capacitor is electrically connected to the second terminal of the third switching module, the second terminal of the second switching module, and the second terminal of the input detection module.

[0024] Optionally, the voltage detection module includes: a first resistor and a variable resistor;

[0025] The first end of the first resistor is electrically connected to the first end of the first switching module, the second end of the first resistor is electrically connected to the first end of the variable resistor, and the second end of the variable resistor is electrically connected to the second end of the second switching module, the second end of the third switching module, and the second end of the output module.

[0026] Optionally, the voltage detection module further includes: a power battery, wherein a first terminal of the power battery is electrically connected to a first terminal of the first resistor, and a second terminal of the power battery is electrically connected to a second terminal of the variable resistor;

[0027] The output module further includes an output resistor, the first end of which is electrically connected to the cathode of the diode and the first end of the output capacitor, and the second end of which is electrically connected to the second end of the output capacitor and the second end of the third switching transistor module.

[0028] Optionally, a controller module may also be included;

[0029] The first terminal of the controller module is electrically connected to the detection output terminal of the input detection module, and the second terminal of the controller module is electrically connected to the output terminal of the output module.

[0030] The controller module is used to determine the operating mode of the voltage regulation circuit based on the reference voltage signal value, and output a switch control signal based on the operating mode, combined with the reference voltage signal value and the output signal. The switch control signal includes a first pulse control signal, a second pulse control signal and a third pulse control signal, wherein the first pulse control signal is used to control the operating state of the first switching transistor module, the second pulse control signal is used to control the operating state of the second switching transistor module, and the third pulse control signal is used to control the operating state of the third switching transistor module.

[0031] Secondly, this application provides a control method for a voltage regulating circuit, the control method comprising:

[0032] The voltage is detected by the input detection module in the voltage regulation circuit to obtain the reference voltage signal value of the voltage regulation circuit;

[0033] When the reference voltage signal value is greater than the preset reference voltage threshold, it is determined that the voltage regulation circuit enters the boost mode. Based on the boost mode, the first switching module in the voltage regulation circuit is turned on and the second switching module in the voltage regulation circuit is turned off. Energy is stored through the energy storage module. According to the reference voltage signal value and the output signal of the output module in the voltage regulation circuit, the energy stored in the energy storage module and the input signal are provided to the output module through the third switching module in the voltage regulation circuit for boost regulation.

[0034] When the reference voltage signal value is less than the preset reference voltage threshold, the voltage regulation circuit is determined to enter the buck mode. Based on the buck mode, the third switching module is controlled to disconnect. According to the reference voltage signal value and the output signal of the output module, the energy storage module stores energy through the first switching module and the second switching module, and the stored energy signal is provided to the output module for buck regulation.

[0035] Thirdly, this application provides a voltage regulating device, which includes a voltage regulating circuit as described in any of the first aspects.

[0036] In this embodiment, the first terminal of the input detection module in the voltage regulation circuit is electrically connected to the first terminal of the first switching module, enabling the input detection module to detect the reference voltage signal value of the voltage regulation circuit. The second terminal of the first switching module is electrically connected to the first terminal of the second switching module and the first terminal of the energy storage module. The second terminal of the energy storage module is electrically connected to the first terminal of the third switching module and the first terminal of the output module. The second terminal of the output module is electrically connected to the second terminals of the third switching module, the second switching module, and the second terminal of the input detection module. Therefore, when the reference voltage signal value is greater than a preset reference voltage threshold, the voltage regulation circuit enters boost mode, the first switching module is turned on, the second switching module is turned off, and boost regulation is performed through the third switching module based on the reference voltage signal value and the output signal of the output module. Conversely, when the reference voltage signal value is less than the preset reference voltage threshold, the voltage regulation circuit enters buck mode, the third switching module is turned off, and buck regulation is performed through the first and second switching modules based on the reference voltage signal value and the output signal of the output module. This broadens the selection of voltage regulation methods, making the voltage regulation circuit more versatile and flexible. Attached Figure Description

[0037] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of a voltage regulation circuit provided in an embodiment of this application;

[0040] Figure 2 A schematic diagram of a voltage regulation circuit provided in an optional embodiment of this application;

[0041] Figure 3 This is a schematic diagram of the voltage regulation circuit provided in another optional embodiment of this application;

[0042] Figure 4 This is a flowchart illustrating a control method for a voltage regulation circuit provided in an embodiment of this application.

[0043] The diagram is labeled as follows: 11. Input detection module, 12. First switching transistor module, 13. Second switching transistor module, 14. Third switching transistor module, 15. Energy storage module, 16. Output module, Vref, reference voltage signal value, V0, output signal, V1, input signal, S1, first switching transistor, S2, second switching transistor, S3, third switching transistor, D, diode, C, output capacitor, R3, output resistor, R1, first resistor, R2, variable resistor, 111, power supply battery, 17. Controller module. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] Figure 1This is a schematic diagram of a voltage regulation circuit provided in an embodiment of this application. The voltage regulation circuit specifically includes: an input detection module 11, a first switching transistor module 12, a second switching transistor module 13, a third switching transistor module 14, an energy storage module 15, and an output module 16. The first terminal of the input detection module 11 is electrically connected to the first terminal of the first switching transistor module 12. The second terminal of the first switching transistor module 12 is electrically connected to the first terminal of the second switching transistor module 13 and the first terminal of the energy storage module 15. The second terminal of the energy storage module 15 is electrically connected to the first terminal of the third switching transistor module 14 and the first terminal of the output module 16. The second terminal of the output module 16 is electrically connected to the second terminal of the third switching transistor module 14, the second terminal of the second switching transistor module 13, and the second terminal of the input detection module 11. The input detection module 11 is used to detect the reference voltage signal value Vref of the voltage regulation circuit. When the reference voltage signal value Vref is greater than the preset reference voltage threshold, the voltage regulation circuit enters boost mode, the first switching module 12 is turned on, the second switching module 13 is turned off, and the third switching module 14 is used to perform boost regulation based on the reference voltage signal value Vref and the output signal V0 of the output module 16; when the reference voltage signal value Vref is less than the preset reference voltage threshold, the voltage regulation circuit enters buck mode, the third switching module 14 is turned off, and the first switching module 12 and the second switching module 13 are used to perform buck regulation based on the reference voltage signal value Vref and the output signal V0 of the output module.

[0046] Specifically, in this embodiment, the first terminal of the input detection module 11 is electrically connected to the first terminal of the first switching module 12 and the first terminal of the energy storage module 15, so that the input detection module 11 can detect the reference voltage signal value Vref of the voltage regulation circuit and control the working mode of the voltage regulation circuit according to the reference voltage signal value Vref. The second terminal of the energy storage module 15 is electrically connected to the first terminal of the third switching module 14 and the first terminal of the output module 16, so that the energy storage module 15 can store energy based on the input voltage and output the stored electrical energy signal to the output module 16. The second terminal of the output module 16 is electrically connected to the second terminal of the third switching module 14, the second terminal of the second switching module 13 and the second terminal of the input detection module 11, so that the output module can output the output signal V0 based on the working state of the first switching module 12, the second switching module 13 and the third switching module 14.

[0047] For example, when the reference voltage signal value Vref is greater than the preset reference voltage threshold, the voltage regulation circuit can enter boost mode. In boost mode, the first switching module 12 is normally on, the second switching module 13 is normally off, and the third switching module 14 is initially on to charge the energy storage module 15 through the first switching module 12. Subsequently, the third switching module 14 can be controlled to turn off, allowing the energy storage module 15 to provide the stored electrical energy signal to the output module 16, thereby achieving boost. When the reference voltage signal value Vref is less than the preset reference voltage threshold, the voltage regulation circuit can enter buck mode. In buck mode, the third switching module 14 is normally off. First, the energy storage module 15 can be charged through the on first switching module 12. Subsequently, the first switching module 12 is controlled to turn off, and the second switching module 13 provides freewheeling current, allowing the energy storage module 15 to provide the stored energy to the output module 16, thereby achieving buck.

[0048] Furthermore, the voltage regulation circuit can stabilize the output voltage V0 based on the reference voltage signal value Vref and the output voltage V0. In boost mode, it can stabilize the output voltage V0 by adjusting the duty cycle of the third pulse control signal PWM3 corresponding to the third switching transistor module 14. In buck mode, it can stabilize the output voltage V0 by adjusting the duty cycle of the first transistor switching pulse control signal corresponding to the first switching transistor module 12 and the second pulse control signal PWM2 corresponding to the second switching transistor module 13.

[0049] As can be seen, in this embodiment, the first terminal of the input detection module 11 is electrically connected to the first terminal of the first switching module 12, enabling the input detection module 11 to detect the reference voltage signal value Vref of the voltage regulation circuit. The second terminal of the first switching module 12 is electrically connected to the first terminal of the second switching module 13 and the first terminal of the energy storage module 15. The second terminal of the energy storage module 15 is electrically connected to the first terminal of the third switching module 14 and the first terminal of the output module 16. The second terminal of the output module 16 is electrically connected to the second terminal of the third switching module 14, the second terminal of the second switching module 13, and the second terminal of the input detection module 11. Therefore, when the reference voltage signal value Vref is large... When the preset reference voltage threshold is reached, the voltage regulation circuit enters boost mode, the first switching module 12 is turned on, and the second switching module 13 is turned off. The voltage is boosted and regulated by the third switching module 14 based on the reference voltage signal value Vref and the output signal V0 of the output module 16. When the reference voltage signal value Vref is less than the preset reference voltage threshold, the voltage regulation circuit enters buck mode, the third switching module 14 is turned off, and the voltage is bucked and regulated by the first switching module 12 and the second switching module 13 based on the reference voltage signal value Vref and the output signal V0 of the output module 16. This broadens the selection of voltage regulation methods and makes the voltage regulation circuit more versatile and flexible.

[0050] Figure 2 This application provides a schematic diagram of a voltage regulating circuit according to an optional embodiment. Optionally, such as... Figure 2 As shown, in this embodiment of the application, when the reference voltage signal value Vref is equal to a preset reference voltage threshold, the voltage regulation circuit enters the regulated output mode, the first switching module 12 is turned on, and the second switching module 13 and the third module 14 are turned off; wherein, the first switching module 12 is used to transmit the input signal V1 of the voltage regulation circuit to the energy storage module 15; the energy storage module 15 is used to provide a power signal to the output module 16 based on the input signal V1; the output module 16 is used to generate an output signal V0 based on the power signal, and the voltage value of the output signal V0 is equal to the voltage value V1 of the input signal.

[0051] Specifically, in this embodiment of the application, when the reference voltage signal value Vref is equal to the preset reference voltage threshold, the voltage regulation circuit can enter the regulated output mode. At this time, the first switching module 12 is turned on, and the second switching module 13 and the third switching module 14 are turned off, so that the voltage regulation circuit can transmit the input signal V1 to the energy storage module 15 through the first switching module 12, and provide the power signal to the output module 16 through the energy storage module 15. In turn, the output module 16 can generate the output signal V0 according to the power signal provided by the energy storage module 15, and the voltage value of the output voltage V0 is equal to the voltage value of the input signal V1.

[0052] Optional, such as Figure 2 As shown, the first switching module 12 in this embodiment of the application may specifically include a first switching module S1, wherein the first end of the first switching module S1 is electrically connected to the first end of the input detection module 11, and the second end of the first switching module S1 is electrically connected to the first end of the second switching module 13 and the first end of the energy storage module 15.

[0053] Specifically, the first terminal of the first switch S1 can be electrically connected to the first terminal of the input detection module 11, and the second terminal of the first switch S1 can be electrically connected to the first terminal of the second switch module 13, so that when the first switch S1 is in the on state, the voltage regulation circuit can provide the input signal V1 to the energy storage module 15, so that the energy storage module 15 can store energy based on the input signal V1.

[0054] Optional, such as Figure 2 As shown, the second switch module 13 in this embodiment includes a second switch S2; wherein, the first end of the second switch S2 is electrically connected to the second end of the first switch module 12 and the first end of the energy storage module 15, and the second end of the second switch S2 is electrically connected to the second end of the output module 16, the second end of the third switch module 14 and the second end of the input detection module 11.

[0055] Specifically, in this embodiment, the first end of the second switch S2 is electrically connected to the second end of the first switch module 12 and the first end of the energy storage module 15. The second end of the second switch S2 is electrically connected to the second end of the output module 16, the second end of the third switch module 14, and the second end of the input detection module 11. This allows the voltage regulation circuit to provide freewheeling current through the second switch S2 when the second switch S2 is in the on state, thereby providing the electrical energy signal stored in the energy storage module 15 to the output module 16 through the second switch S2. This allows the output module 16 to generate an output signal V0 based on the electrical energy signal provided by the energy storage module.

[0056] Optional, such as Figure 2 As shown, the third switch module 14 in this embodiment may specifically include: a third switch S3; wherein, the first end of the third switch S3 is electrically connected to the second end of the energy storage module 15 and the first end of the output module 16, and the second end of the third switch S3 is electrically connected to the second end of the output module 16, the second end of the second switch module 13 and the second end of the input detection module 11.

[0057] Specifically, in this embodiment, the first terminal of the third switch S3 is electrically connected to the second terminal of the energy storage module 15 and the first terminal of the output module 16. The second terminal of the third switch S3 is electrically connected to the second terminal of the output module 16, the second terminal of the second switch module 13, and the second terminal of the input detection module 11. This allows the voltage regulation circuit to provide the input signal V1 to the energy storage module 15 when the third switch S3 is turned on, enabling the energy storage module 15 to store energy. The output module 16 is short-circuited by the turned-on third switch S3, and the output module 16 is short-circuited when the third switch S3 is turned off. When the circuit is turned on, in boost mode, the first switch S1 provides the input signal V1 and the electrical energy signal stored in the energy storage module 15 to the output module 16, so that the output signal V0 of the voltage regulation circuit is higher than the input signal V1, thereby achieving voltage boost. In buck mode, the second switch S2 provides freewheeling current and provides the electrical energy signal stored in the energy storage module 15 to the output module 16, so that the output signal V0 of the voltage regulation circuit is less than the input signal V1, thereby achieving voltage buck. This makes the voltage regulation circuit more versatile and flexible, and broadens the selection of voltage regulation methods.

[0058] Optional, such as Figure 2 As shown, the energy storage module 16 in this embodiment may specifically include an energy storage inductor L; wherein, the first end of the energy storage inductor L is electrically connected to the second end of the first switching module 12 and the first end of the second switching module 13, and the second end of the energy storage inductor L is electrically connected to the first end of the third switching module 14 and the first end of the output module 16.

[0059] Specifically, in this embodiment, the first end of the energy storage inductor L is electrically connected to the second end of the first switching module 12, allowing the energy storage inductor L to store energy based on the input voltage V1 when the first switching module 12 is on. Furthermore, the first end of the energy storage inductor L can be electrically connected to the first end of the second switching module 13, and the second end of the energy storage inductor L is electrically connected to the first end of the third switching module 14 and the first end of the output module 16, allowing the energy storage inductor L to store energy based on the input voltage V1 when the first switching module 12 is off and the second switching module 13 is on. The second switch 13 provides freewheeling current, thereby supplying the energy signal stored in the energy storage inductor L to the output module 16. This results in the output signal V0 of the output module 16 being less than the input signal, thus enabling the voltage regulation circuit to step down the voltage. Furthermore, when the first switch module is turned on and both the second switch module 13 and the third switch module 14 are turned off, both the input signal V1 and the energy signal provided by the energy storage inductor L are supplied to the output module 16. This results in the output signal V0 generated by the output module 16 being greater than the input signal V1, thus enabling the voltage regulation circuit to step up the voltage.

[0060] Optional, such as Figure 2 As shown, the output module 16 in this embodiment may specifically include a diode D and an output capacitor C. The anode of diode D is electrically connected to the second terminal of the energy storage inductor L and the first terminal of the third switching module 14, and the cathode of diode D is electrically connected to the first terminal of the output capacitor C. This allows the electrical energy signal provided by the energy storage module 15 to be supplied to the output capacitor C through diode D. The second terminal of the output capacitor C is electrically connected to the second terminal of the third switching module 14, the second terminal of the second switching module 13, and the second terminal of the input detection module 11, allowing the output capacitor C to be charged based on the electrical energy signal provided by the energy storage module 15, thereby stabilizing the output signal V0. It should be noted that the diode D in this embodiment can be used as a freewheeling diode to ensure stable output of the output module 16.

[0061] Optional, such as Figure 2As shown, the voltage detection module in this embodiment includes a first resistor R1 and a variable resistor R2. The first end of the first resistor R1 is electrically connected to the first end of the first switching module 12, and the second end of the first resistor R1 is electrically connected to the first end of the variable resistor R2. The second end of the variable resistor R2 is electrically connected to the second end of the second switching module 13, the second end of the third switching module 14, and the second end of the output module 16. It should be noted that the first resistor R1 in this embodiment can be used as a current-limiting resistor to limit the current in the branch where the current-limiting resistor is located, preventing excessive current from damaging circuit components. The variable resistor R2 can be used to adjust the operating mode of the voltage regulation circuit. For example, the resistance of the variable resistor R2 can be changed to adjust the operating mode of the voltage regulation circuit. The variable resistor R2 can be a rheostat or a rheostat box, etc., and this embodiment does not impose specific limitations on this.

[0062] Specifically, the first end of the first resistor R1 is electrically connected to the first end of the first switching module 12, and the second end of the first resistor R1 is electrically connected to the first end of the variable resistor R2, so that the first resistor R1 can limit current. The second end of the variable resistor R2 is electrically connected to the second end of the second switching module 13, the second end of the third switching module 14, and the second end of the output module 16, so that the detected reference voltage signal value Vref can be changed by adjusting the resistance value of the variable resistor R2. Then, the operating mode of the voltage regulation circuit can be determined by the reference voltage signal value Vref. For example, when the reference voltage signal value Vref is greater than the preset reference voltage threshold, the voltage regulation circuit enters the boost mode, and when the reference voltage signal value Vref is less than the preset reference voltage threshold, the voltage regulation circuit enters the buck mode. The output voltage V0 can be adjusted and controlled based on the output voltage V0 and the reference voltage signal value Vref to stabilize the output voltage V0.

[0063] Optional, such as Figure 2 As shown, the voltage detection module 11 in this embodiment further includes a power battery 111. The first terminal of the power battery 111 is electrically connected to the first terminal of the first resistor R1, and the second terminal of the power battery 111 is electrically connected to the second terminal of the variable resistor R2, enabling the power battery 111 to provide an input signal to the energy storage module 15 via the first switching transistor S1. The power battery can be a DC signal of any voltage value that meets the circuit requirements, such as a 3-volt or 5-volt DC signal; this embodiment does not impose specific limitations on this.

[0064] Optional, such as Figure 2As shown, the output module 16 may further include: an output resistor R3, the first end of which is electrically connected to the cathode of the diode D and the first end of the output capacitor C, the second end of which is electrically connected to the second end of the output capacitor C and the second end of the third switching module 14, and the second end of which is electrically connected to the second end of the output capacitor C, the second end of the third switching module 14, the second end of the second switching module 13 and the second end of the input detection module 11.

[0065] As an example of this application, in the boost mode, the first switch S1 is controlled to be normally on and the second switch S2 is controlled to be normally off. Boosting can then be achieved through the operation of the third switch S3. First, the third switch S3 can be turned on, allowing the power battery 111 to charge the energy storage inductor L. The inductance potential of the energy storage inductor L is positive on the left and negative on the right. Then, the third switch S3 can be turned off, changing the inductance potential of the energy storage inductor L to negative on the left and positive on the right. The voltage regulator provides the input voltage from the power battery 111 and the energy signal from the energy storage inductor L to the output capacitor C, thus charging the output capacitor C. The output voltage V0 across the output capacitor is the sum of the voltage value of the power battery and the voltage value of the inductance potential of the energy storage inductor, thereby achieving boost regulation.

[0066] Furthermore, in the buck mode of this embodiment, the third switch S3 is controlled to be normally off. At this time, the regulated power can be bucked through the operation of the second switch S2 and the first switch S1. First, the first switch S1 can be turned on and the second switch S2 can be turned off. At this time, the power supply battery 111 will charge the energy storage inductor L and the output capacitor C. Then, the first switch S1 can be turned off and the second switch S2 can be turned on. The second switch S2 provides freewheeling, so that the energy storage inductor L supplies power to the output module 16. In the cyclical operation, the average value of the output voltage V0 across the output capacitor C will be lower than the input voltage V1 of the power supply battery 111, thereby achieving bucking.

[0067] Figure 3 This is a schematic diagram of the voltage regulating circuit provided in another optional embodiment of this application. Optionally, such as... Figure 3As shown, the voltage regulation circuit in this embodiment may further include a controller module 17; wherein, the first terminal of the controller module 17 is electrically connected to the detection output terminal of the input detection module 11, and the second terminal of the controller module 17 is electrically connected to the output terminal of the output module 16; the controller module 17 is used to determine the operating mode of the voltage regulation circuit based on the reference voltage signal value Vref, and based on the operating mode, outputs a pulse control signal in combination with the reference voltage signal value Vref and the output signal V0. The switching pulse control signal includes a first pulse control signal PWM1, a second pulse control signal PWM2 and a third pulse control signal PWM3, wherein the first pulse control signal PWM1 is used to control the operating state of the first switching module 12, the second pulse control signal PWM2 is used to control the operating state of the second switching module 13, and the third pulse control signal PWM3 is used to control the operating state of the third switching module 14. This embodiment does not impose specific limitations on this.

[0068] Specifically, in this embodiment, the first terminal of the controller module 17 is electrically connected to the detection output terminal of the input detection module 11, and the second terminal of the controller module 17 is electrically connected to the output terminal of the output module 16. This allows the controller module 17 to determine the operating mode of the voltage regulation circuit based on the reference voltage signal value Vref, and based on the operating mode, output a switch control signal in combination with the reference voltage signal value Vref and the output signal V0. The switch control signal includes a first pulse control signal PWM1, a second pulse control signal PWM2, and a third pulse control signal PWM3. Thus, the first pulse control signal PWM1 controls the operating state of the first switching transistor module 12, the second pulse control signal PWM2 controls the operating state of the second switching transistor module 13, and the third pulse control signal PWM3 controls the operating state of the third switching transistor module 14, thereby realizing boost regulation or buck regulation, broadening the selection of voltage regulation methods, and making the voltage regulation circuit more versatile and flexible.

[0069] As an example of this application, the input voltage V1 has a voltage value of U1, the first resistor R1 has a resistance value of R1, the variable resistor R2 has a resistance value of R2, and the output voltage V0 has a voltage value of U0. At this time, the range of the reference voltage signal value Vref is 0-U1R2 / R1+R2. The reference voltage threshold can be set to U1R2 / 2(R1+R2). When the reference voltage signal value Vref is equal to U1R2 / 2(R1+R2), the voltage regulation circuit is in the voltage regulation mode. When the reference voltage signal value Vref is greater than U1R2 / 2(R1+R2), the voltage regulation circuit is in the boost mode. When the reference voltage signal value Vref is less than U1R2 / 2(R1+R2), the voltage regulation circuit is in the buck mode.

[0070] Since there is a load at the output terminal in actual use, the output signal V0 needs to be adjusted in real time. Specifically, the output signal V0 can be calculated first to obtain the calculated data U0*R2 / 2(R1+R2), and the calculated output signal V0 is compared with the reference voltage signal value Vref to determine the current working mode of the voltage regulation circuit. For example, when U0*R2 / 2(R1+R2) is less than Vref, the voltage regulation circuit is in buck mode; when U0*R2 / 2(R1+R2) is greater than Vref, the voltage regulation circuit is in boost mode; and when U0*R2 / 2(R1+R2) is equal to Vref, the voltage regulation circuit is in regulated mode. When the voltage regulation circuit is in boost mode, the relationship between the output signal V0 and the duty cycle d is U0=(1 / 1-d)*U1. When the voltage regulation circuit is in buck mode, the relationship between the output signal V0 and the duty cycle d is U0=d*U1. Subsequently, the controller module 17 can adjust the first pulse control signal PWM1, the second pulse control signal PWM2, and the third pulse control signal PWM3 to adjust the duty cycle of the first switching module 12, the second switching module 13, and the third switching module 14, thereby adjusting the voltage value of the output signal V0 so that the output signal V0 can reach a stable and ideal state.

[0071] It should be noted that the switching transistors used in the embodiments of this application can all be transistors, field-effect transistors, or other devices with the same characteristics. In the embodiments of this application, the connection method of the drain and source of each switching transistor can be interchanged. Therefore, the drain and source of each transistor in the embodiments of this application are actually no different. Here, it is only to distinguish the two poles of the transistor other than the gate, one of which is called the first terminal and the other is called the second terminal. The embodiments of this application do not impose specific limitations on this.

[0072] In summary, in this embodiment, the first terminal of the input detection module 11 is electrically connected to the first terminal of the first switching module 12, enabling the input detection module 11 to detect the reference voltage signal value Vref of the voltage regulation circuit. The second terminal of the first switching module 12 is electrically connected to the first terminal of the second switching module 13 and the first terminal of the energy storage module 15. The second terminal of the energy storage module 15 is electrically connected to the first terminal of the third switching module 14 and the first terminal of the output module 16. The second terminal of the output module 16 is electrically connected to the second terminal of the third switching module 14, the second terminal of the second switching module 13, and the second terminal of the input detection module 11, thereby enabling the detection of the reference voltage signal value Vref. When the voltage exceeds the preset reference voltage threshold, the voltage regulation circuit enters boost mode, the first switching module 12 is turned on, and the second switching module 13 is turned off. The voltage is then boosted and regulated by the third switching module 14 based on the reference voltage signal value Vref and the output signal V0 of the output module 16. When the reference voltage signal value Vref is less than the preset reference voltage threshold, the voltage regulation circuit enters buck mode, the third switching module 14 is turned off, and the voltage is then bucked and regulated by the first switching module 12 and the second switching module 13 based on the reference voltage signal value Vref and the output signal V0 of the output module 16. This broadens the selection of voltage regulation methods and makes the voltage regulation circuit more versatile and flexible.

[0073] Figure 4 This is a flowchart illustrating a control method for a voltage regulating circuit provided in an embodiment of this application. Further, the voltage regulating circuit in this embodiment includes a first switching transistor module, a second switching transistor module, a third switching transistor module, and an output module. For example... Figure 4 As shown in the figure, the control method for a voltage regulating circuit provided in this application embodiment may specifically include the following steps:

[0074] Step 410: Voltage detection is performed through the input detection module in the voltage regulation circuit to obtain the reference voltage signal value of the voltage regulation circuit;

[0075] Step 420: When the reference voltage signal value is greater than the preset reference voltage threshold, it is determined that the voltage regulation circuit enters the boost mode. Based on the boost mode, the first switching module in the voltage regulation circuit is turned on and the second switching module in the voltage regulation circuit is turned off. Energy is stored through the energy storage module. According to the reference voltage signal value and the output signal of the output module in the voltage regulation circuit, the energy stored in the energy storage module and the input signal are provided to the output module through the third switching module in the voltage regulation circuit for boost regulation.

[0076] Step 430: When the reference voltage signal value is less than the preset reference voltage threshold, it is determined that the voltage regulation circuit enters the buck mode. Based on the buck mode, the third switching module is controlled to disconnect. According to the reference voltage signal value and the output signal of the output module, the energy storage module stores energy through the first switching module and the second switching module, and the energy stored in the energy storage module is provided to the output module for buck regulation.

[0077] As can be seen, the control method of the voltage regulating circuit in this embodiment detects voltage through the input detection module in the voltage regulating circuit to obtain the reference voltage signal value of the voltage regulating circuit. When the reference voltage signal value is greater than the preset reference voltage threshold, it is determined that the voltage regulating circuit enters the boost mode. Subsequently, based on the boost mode, the first switching module in the voltage regulating circuit is turned on and the second switching module in the voltage regulating circuit is turned off. According to the reference voltage signal value and the output signal of the output module in the voltage regulating circuit, the third switching module in the voltage regulating circuit performs boost regulation. When the reference voltage signal value is less than the preset reference voltage threshold, it is determined that the voltage regulating circuit enters the buck mode. Subsequently, the buck mode is entered, and the third switching module is turned off. According to the reference voltage signal value and the output signal of the output module, the first switching module and the second switching module perform buck regulation. This broadens the selection of voltage regulation methods and makes the voltage regulating circuit more versatile and flexible.

[0078] Furthermore, embodiments of this application also provide a voltage regulating device, which includes a voltage regulating circuit as described in any of the above embodiments. Optionally, the voltage regulating device may be a DC-DC converter.

[0079] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0080] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A voltage regulating circuit, characterized in that, include: The module includes an input detection module, a first switching transistor module, a second switching transistor module, a third switching transistor module, an energy storage module, and an output module. The first end of the input detection module is electrically connected to the first end of the first switching module, the second end of the first switching module is electrically connected to the first end of the second switching module and the first end of the energy storage module, the second end of the energy storage module is electrically connected to the first end of the third switching module and the first end of the output module, and the second end of the output module is electrically connected to the second end of the third switching module, the second end of the second switching module and the second end of the input detection module. The input detection module includes: a first resistor and a variable resistor; a first end of the first resistor is electrically connected to a first end of the first switching transistor module and is connected to the positive terminal of the input power supply; a second end of the first resistor is electrically connected to a first end of the variable resistor; a second end of the variable resistor is electrically connected to a second end of the second switching transistor module, a second end of the third switching transistor module, and a second end of the output module, and is connected to the negative terminal of the input power supply; the input detection module is used to divide the voltage of the input power supply to obtain a reference voltage signal value, wherein adjusting the resistance value of the variable resistor can change the voltage division ratio between the reference voltage signal value and the input power supply voltage, thereby changing the reference voltage signal value; When the reference voltage signal value is greater than the preset reference voltage threshold, the voltage regulation circuit enters the boost mode, the first switching module is turned on, the second switching module is turned off, and the third switching module is used to perform boost regulation according to the reference voltage signal value and the output signal of the output module. When the reference voltage signal value is less than the preset reference voltage threshold, the voltage regulation circuit enters the buck mode, the third switching module is turned off, and the first switching module and the second switching module are used to perform buck regulation according to the reference voltage signal value and the output signal of the output module.

2. The voltage regulating circuit according to claim 1, characterized in that, When the reference voltage signal value is equal to the preset reference voltage threshold, the voltage regulation circuit enters the voltage regulation output mode, the first switching transistor module is turned on, and the second and third switching transistor modules are turned off. The first switching transistor module is used to transmit the input signal of the voltage regulation circuit to the energy storage module; The energy storage module is used to provide an electrical energy signal to the output module based on the input signal; The output module is used to generate the output signal based on the electrical energy signal, and the voltage value of the output signal is equal to the voltage value of the input signal.

3. The voltage regulating circuit according to claim 1 or 2, characterized in that, The first switching module includes: a first switching transistor; The first end of the first switching transistor is electrically connected to the first end of the input detection module, and the second end of the first switching transistor is electrically connected to the first end of the second switching transistor module and the first end of the energy storage module.

4. The voltage regulating circuit according to claim 1 or 2, characterized in that, The second switching module includes: a second switching transistor; The first end of the second switch is electrically connected to the second end of the first switch module and the first end of the energy storage module, and the second end of the second switch is electrically connected to the second end of the output module, the second end of the third switch module and the second end of the input detection module.

5. The voltage regulating circuit according to claim 1 or 2, characterized in that, The third switching module includes: a third switching transistor; The first end of the third switch is electrically connected to the second end of the energy storage module and the first end of the output module, and the second end of the third switch is electrically connected to the second end of the output module, the second end of the second switch module, and the second end of the input detection module.

6. The voltage regulating circuit according to claim 1 or 2, characterized in that, The energy storage module includes an energy storage inductor; The first end of the energy storage inductor is electrically connected to the second end of the first switching module and the first end of the second switching module, and the second end of the energy storage inductor is electrically connected to the first end of the third switching module and the first end of the output module.

7. The voltage regulating circuit according to claim 6, characterized in that, The output module includes: a diode and an output capacitor; The anode of the diode is electrically connected to the second terminal of the energy storage inductor and the first terminal of the third switching module, and the cathode of the diode is electrically connected to the first terminal of the output capacitor. The second terminal of the output capacitor is electrically connected to the second terminal of the third switching module, the second terminal of the second switching module, and the second terminal of the input detection module.

8. The voltage regulating circuit according to claim 7, characterized in that, The input detection module further includes: a power battery, the first end of which is electrically connected to the first end of the first resistor, and the second end of which is electrically connected to the second end of the variable resistor; The output module further includes an output resistor, the first end of which is electrically connected to the cathode of the diode and the first end of the output capacitor, and the second end of which is electrically connected to the second end of the output capacitor and the second end of the third switching transistor module.

9. The voltage regulating circuit according to claim 1 or 2, characterized in that, It also includes a controller module; The first terminal of the controller module is electrically connected to the detection output terminal of the input detection module, and the second terminal of the controller module is electrically connected to the output terminal of the output module. The controller module is used to determine the operating mode of the voltage regulation circuit based on the reference voltage signal value, and output a switch control signal based on the operating mode, combined with the reference voltage signal value and the output signal. The switch control signal includes a first pulse control signal, a second pulse control signal and a third pulse control signal, wherein the first pulse control signal is used to control the operating state of the first switching transistor module, the second pulse control signal is used to control the operating state of the second switching transistor module, and the third pulse control signal is used to control the operating state of the third switching transistor module.

10. A control method for a voltage regulating circuit, characterized in that, The control method is applied to the voltage regulating circuit according to any one of claims 1-9; the control method includes: The voltage is detected by the input detection module in the voltage regulation circuit to obtain a reference voltage signal value. The input detection module includes a first resistor and a variable resistor. The first end of the first resistor is electrically connected to the first end of the first switching transistor module and is connected to the positive terminal of the input power supply. The second end of the first resistor is electrically connected to the first end of the variable resistor. The second end of the variable resistor is electrically connected to the second end of the second switching transistor module, the second end of the third switching transistor module, and the second end of the output module, and is connected to the negative terminal of the input power supply. The input detection module is used to divide the voltage of the input power supply to obtain a reference voltage signal value. By adjusting the resistance value of the variable resistor, the voltage division ratio between the reference voltage signal value and the input power supply voltage can be changed, thereby changing the reference voltage signal value. When the reference voltage signal value is greater than the preset reference voltage threshold, it is determined that the voltage regulation circuit enters the boost mode. Based on the boost mode, the first switching module in the voltage regulation circuit is turned on and the second switching module in the voltage regulation circuit is turned off. Energy is stored through the energy storage module. According to the reference voltage signal value and the output signal of the output module in the voltage regulation circuit, the energy stored in the energy storage module and the input signal are provided to the output module through the third switching module in the voltage regulation circuit for boost regulation. When the reference voltage signal value is less than the preset reference voltage threshold, the voltage regulation circuit is determined to enter the buck mode. Based on the buck mode, the third switching module is controlled to disconnect. According to the reference voltage signal value and the output signal of the output module, the energy storage module stores energy through the first switching module and the second switching module, and the stored energy signal is provided to the output module for buck regulation.

11. A voltage regulating device, characterized in that, The voltage regulating device includes the voltage regulating circuit as described in any one of claims 1-9.

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