CN115603575A - Voltage regulating circuit, control method thereof and voltage regulating equipment - Google Patents

Abstract

The present application relates to a voltage regulation circuit, its control method, and voltage regulation equipment, and relates to the field of electronic technology. The voltage regulation circuit includes: an input detection module, a first switching tube module, a second switching tube module, a third switching tube module, an energy storage module and an output module, and the first end of the input detection module is electrically connected to the first end of the first switch tube module, the second end of the first switch tube module is connected to the first end of the second switch tube module and the energy storage The first end of the module is electrically connected, the second end of the energy storage module is electrically connected to the first end of the third switch tube module and the first end of the output module, and the second end of the output module is connected to the second end of the third switch tube module. end, the second end of the second switch tube module and the second end of the input detection module are electrically connected, thereby widening the selection of voltage regulation methods, and making the voltage regulation circuit have better versatility and flexibility.

Description

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

technical field

The present application relates to the field of electronic technology, in particular to a voltage regulating circuit and its control method and equipment.

Background technique

At present, DC-DC conversion (Direct Current-Direct Current, DC-DC) technology plays a very important role in many important industrial, agricultural, and infrastructure fields such as automobiles, home appliances, new energy, power supplies, and power transmission. Indispensable role in the development of the electronics field. Moreover, with the development of new energy technologies such as photovoltaics, wind power, and battery energy storage, technologies such as multi-power supply and grid connection have become important research directions. However, the existing DC-DC converters have complex structures, large volumes, and general-purpose issues of sex and flexibility.

Contents of the invention

The present application provides a voltage regulating circuit, a control method and a device to solve the problems of the existing DC-DC converter with complex structure, large volume, poor versatility and flexibility.

In the first aspect, the present application provides a voltage regulation circuit, including: an input detection module, a first switching tube module, a second switching tube module, a third switching tube 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 switch tube module, the second end of the first switch tube module is connected to the first end of the second switch tube module and the The first end of the energy storage module is electrically connected, the second end of the energy storage module is electrically connected to the first end of the third switch tube module and the first end of the output module, and the second end of the output module The terminal is electrically connected to the second end of the third switch tube module, the second end of the second switch tube module, and the second end of the input detection module;

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

When the reference voltage signal value is greater than the preset reference voltage threshold, the voltage regulation circuit enters the boost mode, the first switch tube module is turned on, the second switch tube module is turned off, and the third switch tube module The tube module is used for step-up 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 regulating circuit enters the step-down mode, the third switching tube module is disconnected, and the first switching tube module and the second switching tube module It is used for step-down regulation according to the reference voltage signal value and the output signal of the output module.

Optionally, when the value of the reference voltage signal is equal to the preset reference voltage threshold, the voltage regulating circuit enters the voltage regulation output mode, the first switching tube module is turned on, and the second switching tube module and the The third module is disconnected;

The first switching tube module is used to transmit the input signal of the voltage regulating circuit to the energy storage module;

The energy storage module is configured to provide an electric energy signal to the output module based on the input signal;

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

Optionally, the first switch tube module includes: a first switch tube;

The first end of the first switching tube is electrically connected to the first end of the input detection module, the second end of the first switching tube is connected to the first end of the second switching tube module and the energy storage The first ends of the modules are electrically connected.

Optionally, the second switch tube module includes: a second switch tube;

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

Optionally, the third switch tube module includes: a third switch tube;

The first end of the third switching tube 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 switching tube is connected to the second end of the output module. terminal, the second terminal of the second switch tube module and the second terminal of the input detection module are electrically connected.

Optionally, 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 switch tube module and the first end of the second switch tube module, and the second end of the energy storage inductor is connected to the third switch tube module. The first end of the switch tube module is electrically connected to the first end of the output module.

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

The anode of the diode is electrically connected to the second end of the energy storage inductor and the first end of the third switching tube module, and the cathode of the diode is electrically connected to the first end of the output capacitor;

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

Optionally, the voltage 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 switch tube module, the second end of the first resistor is electrically connected to the first end of the variable resistor, and the variable The second end of the resistor is electrically connected to the second end of the second switch tube module, the second end of the third switch tube module and the second end of the output module.

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

The output module further includes: an output resistor, the first end of the output resistor is electrically connected to the cathode of the diode and the first end of the output capacitor, the second end of the output resistor is connected to the output capacitor The second end is electrically connected to the second end of the third switch tube module.

Optionally, a controller module is also included;

The first end of the controller module is electrically connected to the detection output end of the input detection module, and the second end of the controller module is electrically connected to the output end of the output module;

The controller module is configured to determine the working mode of the voltage regulating circuit based on the reference voltage signal value, and based on the working mode, combine the reference voltage signal value and the output signal to output a switch control signal, the 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 working state of the first switch tube module, and the second The pulse control signal is used to control the working state of the second switching tube module, and the third pulse control signal is used to control the working state of the third switching tube module.

In a second aspect, the present application provides a control method of a voltage regulating circuit, the control method comprising:

performing voltage detection through an input detection module in the voltage regulating circuit to obtain a 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 a boost mode, and based on the boost mode, the first switching tube module in the voltage regulating circuit is controlled to conduct and controlling the second switching tube module in the voltage regulation circuit to be disconnected, storing energy through the energy storage module, and according to the reference voltage signal value and the output signal of the output module in the voltage regulation circuit, through the regulation The third switching tube module in the voltage circuit provides the electric energy signal and the input signal stored in the energy storage module to the output module for step-up regulation;

When the reference voltage signal value is less than the preset reference voltage threshold, it is determined that the voltage regulation circuit enters the step-down mode, and based on the step-down mode, the third switching tube module is controlled to be turned off, and according to the reference The voltage signal value and the output signal of the output module, through the first switching tube module and the second switching tube module, enable the energy storage module to store energy, and provide the electric energy signal stored by the energy storage module to the output module, Perform step-down regulation.

In a third aspect, the present application provides a voltage regulating device, which includes the voltage regulating circuit according to any one of the first aspect.

In the embodiment of the present application, the first end of the input detection module in the voltage regulation circuit is electrically connected to the first end of the first switch tube module, so that the input detection module can detect the reference voltage signal value of the voltage regulation circuit, and the first switch tube The second end of the module is electrically connected to the first end of the second switch tube module and the first end of the energy storage module, and the second end of the energy storage module is connected to the first end of the third switch tube module and the first end of the output module Electrically connected, the second end of the output module is electrically connected to the second end of the third switch tube module, the second end of the second switch tube module and the second end of the input detection module, so that when the reference voltage signal value is greater than the preset reference When the voltage threshold is reached, the voltage regulating circuit enters the boost mode, the first switching tube module is turned on, the second switching tube module is turned off, and the boost regulation is performed through the third switching tube module according to the reference voltage signal value and the output signal of the output module ; and when the reference voltage signal value is less than the preset reference voltage threshold, the voltage regulation circuit enters the step-down mode, the third switch tube module is disconnected, and passes through the first switch tube module and the second switch tube module according to the reference voltage signal value and the output signal of the output module. The two switching tube modules perform step-down regulation, thereby widening the choice of voltage regulation methods, and making the voltage regulation circuit have better versatility and flexibility.

Description of drawings

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

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, In other words, other drawings can also be obtained from these drawings without paying creative labor.

FIG. 1 is a schematic structural diagram of a voltage regulating circuit provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a voltage regulating circuit provided in an optional embodiment of the present application;

FIG. 3 is a schematic structural diagram of a voltage regulating circuit provided in another optional embodiment of the present application;

FIG. 4 is a schematic flowchart of a method for controlling a voltage regulating circuit provided in an embodiment of the present application.

Marks in the figure: 11, input detection module, 12, first switching tube module, 13, second switching tube module, 14, third switching tube module, 15, energy storage module, 16, output module, Vref, reference voltage signal Value, V0, output signal, V1, input signal, S1, first switch, S2, second switch, S3, third switch, D, diode, C, output capacitance, R3, output resistance, R1, second A resistor, R2, a variable resistor, 111, a power battery, and 17, a controller module.

detailed description

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

Fig. 1 is a schematic structural diagram of a voltage regulating circuit provided by an embodiment of the present application, and the voltage regulating circuit may specifically include: an input detection module 11, a first switching tube module 12, a second switching tube module 13, and a third switching tube module 14. Energy storage module 15 and output module 16; the first end of the input detection module 11 is electrically connected to the first end of the first switch tube module 12, and the second end of the first switch tube module 12 is connected to the second switch tube module 13 The first end of the first end of the energy storage module 15 is electrically connected to the first end of the energy storage module 15, the second end of the energy storage module 15 is electrically connected to the first end of the third switch tube module 14 and the first end of the output module 16, and the output module 16 The second end is electrically connected to the second end of the third switch tube module 14, the second end of the second switch tube module 13 and the second end of the input detection module 11; wherein, the input detection module 11 is used to detect the voltage regulation circuit The reference voltage signal value Vref. When the reference voltage signal value Vref is greater than the preset reference voltage threshold, the voltage regulation circuit enters the boost mode, the first switching tube module 12 is turned on, the second switching tube module 13 is turned off, and the third switching tube module 14 is used to The voltage signal value Vref and the output signal V0 of the output module 16 are boosted and regulated; when the reference voltage signal value Vref is less than the preset reference voltage threshold, the voltage regulation circuit enters the step-down mode, the third switching tube module 14 is disconnected, and the first The switch tube module 12 and the second switch tube module 13 are used for step-down regulation according to the reference voltage signal value Vref and the output signal V0 of the output module.

Specifically, the first end of the input detection module 11 in the embodiment of the present application is electrically connected to the first end of the first switching tube module 12 and the first end of the energy storage module 15, so that the input detection module 11 can adjust the voltage The reference voltage signal value Vref of the circuit is detected, and the working mode of the voltage regulating circuit is controlled according to the reference voltage signal value Vref, and the second end of the energy storage module 15 is connected to the first end of the third switch tube module 14 and the output module 16 The first end is electrically connected, so that the energy storage module 15 can store energy based on the input voltage, and output the stored electric energy signal to the output module 16, and the second end of the output module 16 is connected to the second end of the third switch tube module 14 , the second end of the second switch tube module 13 and the second end of the input detection module 11 are electrically connected, so that the output module can be based on the work of the first switch tube module 12, the second switch tube module 13 and the third switch tube module 14 state, the output signal V0 is output.

For example, when the reference voltage signal value Vref is greater than the preset reference voltage threshold, the voltage regulating circuit can enter a boost mode. In the boost mode, the first switching tube module 12 is in a normally-on state, and the second switching tube module 13 In the normally off state, the third switching tube module 14 is first in the conducting state to charge the energy storage module 15 through the first switching tube module 12, and then the third switching tube module 14 can be controlled to be disconnected, so that the energy storage The module 15 provides the stored electric energy signal to the output module 16, so as to realize boosting; and when the reference voltage signal value Vref is less than the preset reference voltage threshold, the voltage regulating circuit can enter the step-down mode. In the step-down mode, the first The three switch tube modules 14 are in the normally-off state. First, the energy storage module 15 can be charged through the first switch tube module 12 that is turned on, and then the first switch tube module 12 is controlled to be disconnected, and the second switch tube module 13 Freewheeling, so that the energy storage module 15 can provide the stored energy to the output module 16, so as to realize voltage reduction.

In addition, the voltage regulating circuit can adjust the duty cycle of the third pulse control signal PWM3 corresponding to the third switch tube module 14 in the boost mode based on the reference voltage signal value Vref and the output voltage V0 to stabilize the output voltage V0 and in the step-down mode, by adjusting the duty cycle of the first switch pulse control signal corresponding to the first switch tube module 12 and the second pulse control signal PWM2 corresponding to the second switch tube module 13, the output voltage V0 is stabilized .

It can be seen that the first end of the input detection module 11 in the embodiment of the present application is electrically connected to the first end of the first switch tube module 12, so that the input detection module 11 can detect the reference voltage signal value Vref of the voltage regulating circuit, and the first switch The second end of the tube module 12 is electrically connected to the first end of the second switch tube module 13 and the first end of the energy storage module 15, and the second end of the energy storage module 15 is connected to the first end of the third switch tube module 14 and the first end of the energy storage module 15. The first end of the output module 16 is electrically connected, and the second end of the output module 16 is electrically connected with the second end of the third switch tube module 14, the second end of the second switch tube module 13 and the second end of the input detection module 11 , so that when the reference voltage signal value Vref is greater than the preset reference voltage threshold, the voltage regulating circuit enters the boost mode, the first switch tube module 12 is turned on, and the second switch tube module 13 is turned off. According to the reference voltage signal value Vref and the output The output signal V0 of the module 16 is boosted and regulated through the third switching tube module 14; and when the reference voltage signal value Vref is less than the preset reference voltage threshold, the voltage regulating circuit enters the step-down mode, and the third switching tube module 14 is disconnected, According to the reference voltage signal value Vref and the output signal V0 of the output module 16, step-down regulation is performed through the first switch tube module 12 and the second switch tube module 13, thereby widening the selection of voltage regulation methods, so that the voltage regulation circuit has better performance. Versatility and flexibility.

Fig. 2 is a schematic structural diagram of a voltage regulation circuit provided in an optional embodiment of the present application. Optionally, as shown in Fig. 2, in the embodiment of the present application, when the reference voltage signal value Vref is equal to the preset reference voltage threshold, the regulation The voltage circuit enters the voltage regulation output mode, the first switching tube module 12 is turned on, and the second switching tube module 13 and the third module 14 are disconnected; wherein, the first switching tube module 12 is used to convert the input signal V1 of the voltage regulating circuit Transmission to the energy storage module 15; the energy storage module 15 is used to provide the power signal to the output module 16 based on the input signal V1; the output module 16 is used to generate the output signal V0 based on the power signal, and the voltage value of the output signal V0 is equal to the voltage of the input signal Value V1.

Specifically, when the reference voltage signal value Vref in the embodiment of the present application is equal to the preset reference voltage threshold, the voltage regulating circuit can enter the voltage regulation output mode. At this time, the first switching tube module 12 is turned on, and the second switching tube module 12 The module 13 and the third switch tube module 14 are disconnected, so that the voltage regulation circuit can transmit the input signal V1 to the energy storage module 15 through the first switch tube module 12, and provide the power signal to the output module 16 through the energy storage module 15, and then The output module 16 can generate the output signal V0 according to the electric energy 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 .

Optionally, as shown in FIG. 2 , the first switching transistor module 12 in the embodiment of the present application may specifically include a first switching transistor S1, wherein the first end of the first switching transistor S1 is connected to the first end of the input detection module 11. Terminals are electrically connected, and the second end of the first switching tube S1 is electrically connected to the first end of the second switching tube module 13 and the first end of the energy storage module 15 .

Specifically, the first end of the first switching tube S1 can be electrically connected to the first end of the input detection module 11, and the second end of the first switching tube S1 is electrically connected to the first end of the second switching tube module 13, so that the adjustment The voltage circuit can supply the input signal V1 to the energy storage module 15 when the first switch tube S1 is in a conducting state, so that the energy storage module 15 can store energy based on the input signal V1.

Optionally, as shown in FIG. 2 , the second switching tube module 13 in the embodiment of the present application includes: a second switching tube S2; wherein, the first end of the second switching tube S2 is connected to the first end of the first switching tube module 12 The two ends are electrically connected to the first end of the energy storage module 15, the second end of the second switch tube S2 is connected to the second end of the output module 16, the second end of the third switch tube module 14 and the second end of the input detection module 11. electrical connection.

Specifically, the first end of the second switch tube S2 in the embodiment of the present application is electrically connected to the second end of the first switch tube module 12 and the first end of the energy storage module 15, and the second end of the second switch tube S2 end is electrically connected to the second end of the output module 16, the second end of the third switch tube module 14 and the second end of the input detection module 11, so that the voltage regulating circuit can pass through when the second switch tube S2 is in the conduction state The second switch tube S2 performs freewheeling, so that the power signal stored in the energy storage module 15 is provided to the output module 16 through the second switch tube S2, so that the output module 16 can generate an output signal V0 according to the power signal provided by the energy storage module. .

Optionally, as shown in FIG. 2 , the third switching tube module 14 in the embodiment of the present application may specifically include: a third switching tube S3; wherein, the first end of the third switching tube S3 is connected to the first end of the energy storage module 15 The two ends are electrically connected to the first end of the output module 16, the second end of the third switch tube S3 is connected to the second end of the output module 16, the second end of the second switch tube module 13 and the second end of the input detection module 11 electrical connection.

Specifically, the first end of the third switching tube S3 in the embodiment of the present application 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 switching tube S3 is connected to the output The second end of the module 16, the second end of the second switch tube module 13 and the second end of the input detection module 11 are electrically connected, so that the voltage regulating circuit can provide the input signal V1 to the The energy storage module 15, so that the energy storage module 15 can store energy, and short-circuit the output module 16 through the third switch tube S3 that is turned on, and when the third switch tube S3 is turned off, in boost mode, through the third switch tube S3 A switch tube S1 provides the input signal V1 and the electric energy signal stored in the energy storage module 15 to the output module 16, so that the output signal V0 output by the voltage regulating circuit is higher than the input signal V1, thereby realizing boosting; in the step-down mode, through The second switch tube S2 performs freewheeling, and provides the electric energy signal stored in the energy storage module 15 to the output module 16, so that the output signal V0 output by the voltage regulation circuit is smaller than the input signal V1, thereby realizing step-down, and further enabling the voltage regulation circuit to have more Good versatility and flexibility broaden the choice of pressure regulation methods.

Optionally, as shown in FIG. 2 , the energy storage module 16 in the embodiment of the present application may specifically include an energy storage inductance L; wherein, the first end of the energy storage inductance L is connected to the second end of the first switch tube module 12 and The first end of the second switch tube module 13 is electrically connected, and the second end of the energy storage inductor L is electrically connected to the first end of the third switch tube module 14 and the first end of the output module 16 .

Specifically, the first end of the energy storage inductor L in the embodiment of the present application is electrically connected to the second end of the first switch tube module 12, so that the energy storage inductor L can be turned on when the first switch tube module 12 is turned on. , based on the input voltage V1 for energy storage, and the first end of the energy storage inductor L can be electrically connected to the first end of the second switch tube module 13, and the second end of the energy storage inductor L is connected to the first end of the third switch tube module 14 One end is electrically connected to the first end of the output module 16, so that the energy storage inductance L is freewheeling through the second switch tube 13 when the first switch tube module 12 is disconnected and the second switch tube module 13 is turned on. Therefore, the electric energy signal stored in the energy storage inductance L is provided to the output module 16, so that the output signal V0 output by the output module 16 is smaller than the input signal, and then the voltage regulating circuit realizes step-down; and the first switching tube module can be turned on, When both the second switching tube module 13 and the third switching tube module 14 are disconnected, both the input signal V1 and the electric energy signal provided by the energy storage inductance L are provided to the output module 16, so that the output signal V0 generated by the output module 16 It is greater than the input signal V1, and then the voltage regulating circuit realizes boosting.

Optionally, as shown in FIG. 2 , the output module 16 in the embodiment of the present application may specifically include: a diode D and an output capacitor C; wherein, the anode of the diode D is connected to the second end of the energy storage inductor L and the third switch tube The first end of the module 14 is electrically connected, and the cathode of the diode D is electrically connected to the first end of the output capacitor C; so that the energy signal provided by the energy storage module 15 can be provided to the output capacitor C through the diode D; the second end of the output capacitor C terminal is electrically connected to the second end of the third switch tube module 14, the second end of the second switch tube module 13 and the second end of the input detection module 11, so that the output capacitor C can be based on the electric energy signal provided by the energy storage module 15. Charge, so that the output signal V0 can be output stably. It should be noted that the diode D in the embodiment of the present application can be used as a freewheeling diode to ensure the stable output of the output module 16 .

Optionally, as shown in FIG. 2 , the voltage detection module in the embodiment of the present application includes: a first resistor R1 and a variable resistor R2; One end is electrically connected, 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 connected to the second end of the second switching tube module 13, and the third switching tube module The second end of 14 is electrically connected to the second end of the output module 16 . It should be noted that the first resistor R1 in the embodiment of the present application can be used as a current-limiting resistor to limit the current of the branch circuit where the current-limiting resistor is located, so as to prevent excessive current from damaging circuit components; the variable resistor R2 can be used to adjust the The working mode of the voltage regulating circuit, for example, the resistance of the variable resistor R2 can be changed to achieve the purpose of adjusting the working mode of the voltage regulating circuit, and the variable resistor R2 can be a rheostat, or a rheostat box, etc., which is not discussed in the embodiment of this application. Make specific restrictions.

Specifically, the first end of the first resistor R1 is electrically connected to the first end of the first switch tube 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 the current, and the second end of the variable resistor R2 is electrically connected to the second end of the second switch tube module 13, the second end of the third switch tube module 14, and the second end of the output module 16, so that By adjusting the resistance value of the variable resistor R2, thereby changing the detected reference voltage signal value Vref, then the working mode of the voltage regulating circuit can be determined by the reference voltage signal value Vref, such as when the reference voltage signal value Vref is greater than the preset reference voltage threshold, the voltage regulating circuit enters the boost mode, and when the reference voltage signal value Vref is less than the preset reference voltage threshold, the voltage regulating circuit enters the step-down mode, and can adjust and control based on the output voltage V0 and the reference voltage signal value Vref, Make the output voltage V0 stable.

Optionally, as shown in FIG. 2, the voltage detection module 11 in the embodiment of the present application further includes: a power battery 111, the first end of the power battery 111 is electrically connected to the first end of the first resistor R1, and the power battery 111 The second end is electrically connected to the second end of the variable resistor R2, so that the power battery 111 can provide an input signal to the energy storage module 15 through the first switch tube S1. Wherein, the power battery can be a DC signal of any voltage value that meets the circuit requirements, for example, it can be a DC signal with a voltage value of 3 volts or 5 volts, which is not specifically limited in this embodiment of the present application.

Optionally, as shown in FIG. 2, the output module 16 may also include: an output resistor R3, the first end of the output resistor R3 is electrically connected to the cathode of the diode D and the first end of the output capacitor C, and the second end of the output resistor R3 terminal is electrically connected to the second end of the output capacitor C and the second end of the third switch tube module 14, and the second end of the output resistor R3 is connected to the second end of the output capacitor C and the second end of the third switch tube module 14 end, the second end of the second switch tube module 13 and the second end of the input detection module 11 are electrically connected.

As an example of the present application, in the embodiment of the present application, when in the boost mode, the first switch tube S1 is controlled in the normally-on state, and the second switch tube S2 is controlled in the normally-off state. At this time, the The action of the third switching tube S3 realizes boosting. First, the third switching tube S3 can be controlled to be turned on. At this time, the power battery 111 can charge the energy storage inductor L. The inductance potential of the energy storage inductor L is left positive and right negative, and then the third switching tube S3 can be controlled to turn off. At this time, the inductance potential of the energy storage inductor L becomes negative on the left and positive on the right, and the voltage regulation power supplies the input voltage provided by the power battery 111 and the electric energy signal provided by the energy storage inductor L to the output capacitor C, thereby providing the output capacitor C charging, at this time, the voltage value of the output voltage V0 at both ends of 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 realizing boost regulation.

In addition, when the embodiment of the present application is in the step-down mode, the third switch tube S3 is controlled to be in the normally-off state, and at this time, the voltage regulation power can be stepped down through the actions of the second switch tube S2 and the first switch tube S1. Firstly, the first switch tube S1 can be controlled to be turned on, and the second switch tube S2 is turned off. At this time, the power battery 111 will charge the energy storage inductor L and the output capacitor C, and then the first switch tube S1 can be controlled to be turned off, and the The second switch tube S2 is turned on, and freewheeling is carried out through the second switch tube S2, so that the energy storage inductor L supplies power to the output module 16. In the case of reciprocating cycles, the average value of the output voltage V0 at both ends of the output capacitor C will be lower than The input voltage V1 of the power battery 111 is thus realized to step down.

FIG. 3 is a schematic structural diagram of a voltage regulation circuit provided in another optional embodiment of the present application. Optionally, as shown in FIG. 3 , the voltage regulation circuit in the embodiment of the present application may also include a controller module 17; The first end of the device module 17 is electrically connected to the detection output end of the input detection module 11, and the second end of the controller module 17 is electrically connected to the output end of the output module 16; the controller module 17 is used for based on the reference voltage signal value Vref Determine the working mode of the voltage regulating circuit, and based on the working mode, combine the reference voltage signal value Vref and the output signal V0 to output the pulse control signal, the switch pulse control signal includes the first pulse control signal PWM1, the second pulse control signal PWM2 and the third pulse Control signal PWM3, wherein the first pulse control signal PWM1 is used to control the working state of the first switching tube module 12, the second pulse control signal PWM2 is used to control the working state of the second switching tube module 13, and the third pulse control signal PWM3 It is used to control the working state of the third switching tube module 14, which is not specifically limited in this embodiment of the present application.

Specifically, the first end of the controller module 17 in the embodiment of the present application is electrically connected to the detection output end of the input detection module 11, and the second end of the controller module 17 is electrically connected to the output end of the output module 16, so that the control The controller module 17 can determine the working mode of the voltage regulating circuit based on the reference voltage signal value Vref, and based on the working mode, output the switch control signal in combination with the reference voltage signal value Vref and the output signal V0, the switch control signal includes the first pulse control signal PWM1, the second The second pulse control signal PWM2 and the third pulse control signal PWM3, thereby controlling the working state of the first switch tube module 12 through the first pulse control signal PWM1, and controlling the working state of the second switch tube module 13 through the second pulse control signal PWM2, The working state of the third switch tube module 14 is controlled by the third pulse control signal PWM3, thereby realizing boost regulation or step-down regulation, widening the choice of voltage regulation methods, and making the voltage regulation circuit have better versatility and flexibility.

As an example of the present application, the voltage value of the input voltage V1 in the example of the present application is U1, the resistance value of the first resistor R1 is R1, the resistance value of the variable resistor R2 is R2, and the voltage value of the output voltage V0 is U0, At this time, the range of the reference voltage signal value Vref is 0-U1R2/R1+R2, and 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 stabilization 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 smaller than U1R2/2(R1+R2) , the regulator circuit is in buck mode.

Since there is a load at the output end in actual use, it is necessary to adjust the output signal V0 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 The output signal V0 is compared with the reference voltage signal value Vref to determine the current working mode of the voltage regulating circuit. For example, when U0*R2/2(R1+R2) is less than Vref, the voltage regulating circuit is in step-down mode, and when U0*R2/2(R1+R2) is greater than Vref, the voltage regulating circuit is in boost mode , when U0*R2/2(R1+R2) is equal to Vref, the voltage regulation circuit is in the voltage stabilization mode, and when the voltage regulation circuit is in the boost mode, the relationship between the output signal V0 and the duty ratio d at this time is U0 =(1/1-d)*U1, when the voltage regulating circuit is in step-down mode, the relationship between the output signal V0 and the duty cycle d at this time is U0=d*U1, and then the controller module 17 can be used to control the first A pulse control signal PWM1, a second pulse control signal PWM2 and a third pulse control signal PWM3 are adjusted to adjust the duty cycle of the first switching tube module 12, the second switching tube module 13 and the third switching tube module 14, thereby The voltage value of the output signal V0 is adjusted so that the output signal V0 can reach a stable ideal state.

It should be noted that the switch tubes used in the embodiments of the present application may be triodes or field effect transistors or other devices with the same characteristics. In the embodiment of the present application, the connection mode of the drain and the source of each switch tube can be interchanged. Therefore, there is actually no difference between the drain and the source of each transistor in the embodiment of the present application. This is only for the purpose of distinguishing As for the two poles of the transistor except the gate, one pole is called a first terminal, and the other pole is called a second terminal, which is not specifically limited in this embodiment of the present application.

In summary, the first end of the input detection module 11 in the embodiment of the present application is electrically connected to the first end of the first switching tube module 12, so that the input detection module 11 can detect the reference voltage signal value Vref of the voltage regulation circuit, and The second end of the first switch tube module 12 is electrically connected to the first end of the second switch tube module 13 and the first end of the energy storage module 15, and the second end of the energy storage module 15 is connected to the first end of the third switch tube module 14. One end is electrically connected to the first end of the output module 16, and the second end of the output module 16 is connected to the second end of the third switch tube module 14, the second end of the second switch tube module 13, and the second end of the input detection module 11. Terminals are electrically connected, so that when the reference voltage signal value Vref is greater than the preset reference voltage threshold, the voltage regulating circuit enters the boost mode, the first switch tube module 12 is turned on, and the second switch tube module 13 is turned off. According to the reference voltage signal value Vref and the output signal V0 of the output module 16 are boosted and regulated through the third switch tube module 14; disconnected, according to the reference voltage signal value Vref and the output signal V0 of the output module 16, step-down adjustment is performed through the first switch tube module 12 and the second switch tube module 13, thereby widening the selection of voltage regulation methods, so that the voltage regulation circuit has Better versatility and flexibility.

FIG. 4 is a schematic flowchart of a method for controlling a voltage regulating circuit provided in an embodiment of the present application. Furthermore, the voltage regulating circuit in the embodiment of the present application includes a first switching tube module, a second switching tube module, a third switching tube module and an output module. As shown in FIG. 4, a method for controlling a voltage regulating circuit provided in an embodiment of the present application may specifically include the following steps:

Step 410, performing voltage detection through the input detection module in the voltage regulating circuit to obtain the reference voltage signal value of the voltage regulating circuit;

Step 420, when the reference voltage signal value is greater than the preset reference voltage threshold, determine that the voltage regulating circuit enters a boost mode, and based on the boost mode, control the first switching tube module in the voltage regulating circuit Turning on and controlling the disconnection of the second switch tube module in the voltage regulation circuit, storing energy through the energy storage module, and according to the reference voltage signal value and the output signal of the output module in the voltage regulation circuit, through The third switching tube module in the voltage regulating circuit provides the electric energy signal and the input signal stored in the energy storage module to the output module to perform boost regulation;

Step 430, when the reference voltage signal value is less than the preset reference voltage threshold, determine that the voltage regulation circuit enters the step-down mode, and based on the step-down mode, control the third switching tube module to turn off, and according to The reference voltage signal value and the output signal of the output module enable the energy storage module to store energy through the first switching tube module and the second switching tube module, and provide the electric energy signal stored in the energy storage module to Output block for step-down regulation.

It can be seen that the control method of the voltage regulation circuit in the embodiment of the present application performs voltage detection through the input detection module in the voltage regulation circuit to obtain the reference voltage signal value of the voltage regulation circuit, and when the reference voltage signal value is greater than the preset reference voltage threshold When it is determined that the voltage regulating circuit enters the boost mode, then based on the boost mode, the first switching tube module in the voltage regulating circuit is controlled to be turned on and the second switching tube module in the voltage regulating circuit is controlled to be turned off, so as to The signal value and the output signal of the output module in the voltage regulating circuit are boosted and regulated through the third switching tube module in the voltage regulating circuit, and when the reference voltage signal value is less than the preset reference voltage threshold, it can be determined that the voltage regulating circuit enters Step-down mode, and then the step-down mode can be used to control the third switch tube module to be disconnected, so as to perform step-down regulation through the first switch tube module and the second switch tube module according to the reference voltage signal value and the output signal of the output module, thereby The selection of voltage regulation methods is widened, so that the voltage regulation circuit has better versatility and flexibility.

Furthermore, an embodiment of the present application further provides a voltage regulation device, and the voltage regulation device includes the voltage regulation circuit as described in any one of the above embodiments. Optionally, the voltage regulating device may be a DC-DC converter.

It should be noted that in this article, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these No such actual relationship or order exists between entities or operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above descriptions are only specific embodiments of the present invention, so that those skilled in the art can understand or implement the present 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. Accordingly, the present invention will not 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 (12)

1. A voltage regulating circuit, characterized in that, comprising: an input detection module, a first switching tube module, a second switching tube module, a third switching tube 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 switch tube module, the second end of the first switch tube module is connected to the first end of the second switch tube module and the The first end of the energy storage module is electrically connected, the second end of the energy storage module is electrically connected to the first end of the third switch tube module and the first end of the output module, and the second end of the output module The terminal is electrically connected to the second end of the third switch tube module, the second end of the second switch tube module, and the second end of the input detection module; The input detection module is used to detect the reference voltage signal value of the voltage regulation circuit; When the reference voltage signal value is greater than the preset reference voltage threshold, the voltage regulation circuit enters the boost mode, the first switch tube module is turned on, the second switch tube module is turned off, and the third switch tube module The tube module is used for step-up 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 regulating circuit enters the step-down mode, the third switching tube module is disconnected, and the first switching tube module and the second switching tube module It is used for step-down 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, wherein when the reference voltage signal value is equal to a preset reference voltage threshold, the voltage regulating circuit enters a voltage stabilizing output mode, and the first switching tube module conduction, the second switch tube module and the third module are disconnected; The first switching tube module is used to transmit the input signal of the voltage regulating circuit to the energy storage module; The energy storage module is configured to provide an electric energy signal to the output module based on the input signal; The output module is configured to generate the output signal based on the electric 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, wherein the first switch tube module comprises: a first switch tube; The first end of the first switching tube is electrically connected to the first end of the input detection module, the second end of the first switching tube is connected to the first end of the second switching tube module and the energy storage The first ends of the modules are electrically connected. 4. The voltage regulating circuit according to claim 1 or 2, wherein the second switching tube module comprises: a second switching tube; The first end of the second switch tube is electrically connected to the second end of the first switch tube module and the first end of the energy storage module, and the second end of the second switch tube is connected to the output module The second end of the second switch tube module, the second end of the third switch tube module and the second end of the input detection module are electrically connected. 5. The voltage regulating circuit according to claim 1 or 2, wherein the third switching tube module comprises: a third switching tube; The first end of the third switching tube 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 switching tube is connected to the second end of the output module. terminal, the second terminal of the second switch tube module and the second terminal of the input detection module are electrically connected. 6. The voltage regulating circuit according to claim 1 or 2, wherein the energy storage module comprises an energy storage inductor; The first end of the energy storage inductor is electrically connected to the second end of the first switch tube module and the first end of the second switch tube module, and the second end of the energy storage inductor is connected to the third switch tube module. The first end of the switch tube module is electrically connected to the first end of the output module. 7. The voltage regulating circuit according to claim 1 or 2, wherein the output module comprises: a diode and an output capacitor; The anode of the diode is electrically connected to the second end of the energy storage inductor and the first end of the third switching tube module, and the cathode of the diode is electrically connected to the first end of the output capacitor; The second terminal of the output capacitor is electrically connected to the second terminal of the third switching tube module, the second terminal of the second switching tube module, and the second terminal of the input detection module. 8. The voltage regulating circuit according to claim 7, wherein the voltage detection module comprises: a first resistor and a variable resistor; The first end of the first resistor is electrically connected to the first end of the first switch tube module, the second end of the first resistor is electrically connected to the first end of the variable resistor, and the variable The second end of the resistor is electrically connected to the second end of the second switch tube module, the second end of the third switch tube module and the second end of the output module. 9. The voltage regulating circuit according to claim 8, wherein the voltage detection module further comprises: a power battery, the first end of the power battery is electrically connected to the first end of the first resistor, the The second end of the power battery is electrically connected to the second end of the variable resistor; The output module also includes: an output resistor, the first end of the output resistor is electrically connected to the cathode of the diode and the first end of the output capacitor, the second end of the output resistor is connected to the output capacitor The second end is electrically connected to the second end of the third switch tube module. 10. The voltage regulating circuit according to claim 1 or 2, further comprising a controller module; The first end of the controller module is electrically connected to the detection output end of the input detection module, and the second end of the controller module is electrically connected to the output end of the output module; The controller module is configured to determine the working mode of the voltage regulating circuit based on the reference voltage signal value, and based on the working mode, combine the reference voltage signal value and the output signal to output a switch control signal, the 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 working state of the first switch tube module, and the second The pulse control signal is used to control the working state of the second switching tube module, and the third pulse control signal is used to control the working state of the third switching tube module. 11. A control method for a voltage regulating circuit, characterized in that the control method comprises: performing voltage detection through an input detection module in the voltage regulating circuit to obtain a 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 a boost mode, and based on the boost mode, the first switching tube module in the voltage regulating circuit is controlled to conduct and controlling the second switching tube module in the voltage regulation circuit to be disconnected, storing energy through the energy storage module, and according to the reference voltage signal value and the output signal of the output module in the voltage regulation circuit, through the regulation The third switching tube module in the voltage circuit provides the electric energy signal and the input signal stored in the energy storage module to the output module for step-up regulation; When the reference voltage signal value is less than the preset reference voltage threshold, it is determined that the voltage regulation circuit enters the step-down mode, and based on the step-down mode, the third switching tube module is controlled to be turned off, and according to the reference The voltage signal value and the output signal of the output module, through the first switching tube module and the second switching tube module, enable the energy storage module to store energy, and provide the electric energy signal stored by the energy storage module to the output module, Perform step-down regulation. 12. A voltage regulating device, characterized in that the voltage regulating device comprises the voltage regulating circuit according to any one of claims 1-10.

Images