CN117472135A - An adjustable voltage control circuit - Google Patents

Abstract

The invention discloses an adjustable voltage control circuit, which relates to the field of power supply technology and includes an intelligent control module for module control; a voltage boosting degree judgment module for boosting the electric energy output by the first power module through a voltage boosting threshold. Degree judgment; the first boost module and the second boost module are both used for boost processing; the first mode control module is used to control the series and parallel connection status of the second power module and the first power module; the second mode control The module is used for transmission selection control of electric energy; the second power module is used for energy storage and power supply. The adjustable voltage control circuit of the present invention determines the degree of voltage increase by the voltage increase degree judgment module. When the voltage increase is large, the first mode control module cooperates with the second mode control module to control the power supply mode of the second power module and the first power module, which are connected in series. When power is supplied, the second boost module performs rapid voltage boost processing. When power is supplied in parallel, the first boost module and the second boost module are controlled to perform parallel boost processing.

Description

An adjustable voltage control circuit

Technical field

The invention relates to the field of power supply technology, specifically an adjustable voltage control circuit.

Background technique

At present, voltage control circuits are common circuits in various controller devices. Existing voltage control circuits usually have voltage adjustment functions, that is, relevant voltage adjustment devices are used to complete the adjustment control from low voltage to high voltage or from high voltage to low voltage. , Most of the existing adjustable voltage control circuits are implemented in the form of Boost circuits, which are composed of related MOS power tubes, diodes, capacitors and isolation inductors, etc., and cooperate with micro-control circuits to achieve power control, and the electrical equipment provides all However, the function of the Boost circuit is relatively simple. When the voltage that needs to be configured is higher than the voltage provided by the power supply, the boost rate is slow, and the power distribution control method of the Boost circuit is limited, which cannot effectively improve the circuit. The load capacity and the power supply efficiency of the circuit are not high, so it needs to be improved.

Contents of the invention

Embodiments of the present invention provide an adjustable voltage control circuit to solve the problems raised in the above background technology.

According to an embodiment of the present invention, an adjustable voltage control circuit is provided. The adjustable voltage control circuit includes: a first power supply module, an intelligent control module, a voltage boosting degree determination module, a first voltage boosting module, and a first mode control module. , the second power module, the second mode control module, the second boost module, and the output control module;

The first power module is used to provide first DC power;

The intelligent control module is connected to the voltage boosting degree judgment module, the first voltage boosting module, the second voltage boosting module, the second mode control module and the output control module, and is used to output the first pulse signal, the second voltage boosting module, and the output control module. The pulse signal and the third pulse signal respectively control the operation of the boost degree judgment module, the first boost module and the second boost module, and are used to output the first control signal and control the operation of the second mode control module, and are used to output The second control signal and the third control signal also control the operation of the output control module;

The voltage boosting degree judgment module is connected to the first power supply module and is used to provide a voltage boosting threshold and adjust the voltage boosting threshold through the first pulse signal, and is used to sample the first DC power and Output a voltage signal, used for calculating the difference between the voltage signal and the voltage boost threshold, for comparing the calculated difference with the set voltage threshold and outputting a fourth control signal;

The first boost module is connected to the first power module and is used to receive the second pulse signal and perform boost processing on the first DC power;

The first mode control module is connected to the voltage boosting degree judgment module and the second power module, and is used to control the series and parallel connection status of the second power module and the first power module through the fourth control signal;

The second mode control module is connected to the second power module and the first power module, and is used to receive the first control signal and control the connection between the second power module and the second boost module. Transmit the first DC power to the second power module;

The second power module is used to provide second DC power and to store the power transmitted by the second mode control module;

The second boost module is connected to the second power module and is used to receive the third pulse signal and boost the input electric energy output by the second power module;

The output control module is connected to the first boost module and the second boost module, and is used to receive the second control signal and transmit the electric energy output by the first boost module to the electrical equipment. to receive the third control signal and transmit the electric energy output by the second boost module to the electrical equipment.

Compared with the prior art, the beneficial effects of the present invention are: the adjustable voltage control circuit of the present invention uses an intelligent control module to control the first boost module to boost the electric energy output by the first power module, and determines the degree of boost The module determines the degree of voltage boosting. The first mode control module cooperates with the second mode control module to control the series power supply and parallel power supply of the second power module and the first power module. When the series power supply is provided, the second boost module performs rapid voltage boosting processing to improve The boost rate quickly provides electric energy to the output control module. When power is supplied in parallel, the intelligent control module can control the first boost module and the second boost module to perform parallel boost processing to improve the circuit's load capacity, and the intelligent control module can control The second mode control module provides charging power to the second power module to ensure normal operation of the circuit, and the circuit implements multi-functional voltage-adjustable power distribution through a simple circuit structure to improve power supply efficiency.

Description of the drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic block diagram of the principle of an adjustable voltage control circuit provided by an example of the present invention.

FIG. 2 is a circuit diagram of an adjustable voltage control circuit provided by an example of the present invention.

FIG. 3 is a circuit diagram of a voltage boosting degree judging module provided by an example of the present invention.

Figure 4 is a circuit diagram of a second mode control module provided by an example of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

In one embodiment, please refer to Figure 1. An adjustable voltage control circuit includes: a first power module 1, an intelligent control module 2, a voltage boosting degree determination module 3, a first voltage boosting module 4, and a first mode control module. 5. The second power module 6, the second mode control module 7, the second boost module 8, and the output control module 9;

Specifically, the first power module 1 is used to provide first DC power;

The intelligent control module 2 is connected to the voltage boosting degree judgment module 3, the first voltage boosting module 4, the second voltage boosting module 8, the second mode control module 7 and the output control module 9, and is used to output the first pulse signal, the second pulse signal and the third pulse signal and respectively control the operation of the boost degree judgment module 3, the first boost module 4 and the second boost module 8, and are used to output the first control signal and control the second mode control The work of module 7 is used to output the second control signal and the third control signal and control the work of the output control module 9;

The boost degree judgment module 3 is connected to the first power supply module 1 and is used to provide a boost threshold and adjust the boost threshold through the first pulse signal, and to sample the first DC power and Output a voltage signal, used for calculating the difference between the voltage signal and the voltage boost threshold, for comparing the calculated difference with the set voltage threshold and outputting a fourth control signal;

The first boost module 4 is connected to the first power module 1 and is used to receive the second pulse signal and perform boost processing on the first DC power;

The first mode control module 5 is connected to the voltage boosting degree judgment module 3 and the second power module 6, and is used to control the series-parallel connection status of the second power module 6 and the first power module 1 through the fourth control signal. ;

The second mode control module 7 is connected to the second power module 6 and the first power module 1 and is used to receive the first control signal and control the connection between the second power module 6 and the second boost module 8 , used to transmit the first DC power to the second power module 6;

The second power module 6 is used to provide second DC power and to store the power transmitted by the second mode control module 7;

The second boost module 8 is connected to the second power module 6 and is used to receive the third pulse signal and boost the input electric energy output by the second power module 6;

The output control module 9 is connected to the first boost module 4 and the second boost module 8, and is used to receive the second control signal and transmit the electric energy output by the first boost module 4 to the electrical equipment. , used to receive the third control signal and transmit the electric energy output by the second boost module 8 to the electrical equipment.

In a specific embodiment, the above-mentioned first power supply module 1 can use a DC power supply, which will not be described in detail here; the above-mentioned intelligent control module 2 can be used, but is not limited to a single-chip microcomputer that integrates arithmetic units, controllers, memories, and input and output. It has many components such as a microcontroller and implements functions such as signal processing, data storage, module control, timing control, etc.; the above-mentioned boost degree judgment module 3 can use a voltage sampling circuit, a subtraction circuit, a boost threshold adjustment circuit and a comparison circuit. The voltage sampling circuit performs voltage sampling on the first power module 1, the boost threshold adjustment circuit provides and adjusts the boost threshold, and the subtraction circuit performs subtraction calculation on the boost threshold and the detection signal so that the comparison circuit can determine the degree of boost; the above Both the first boost module 4 and the second boost module 8 can use a Boost boost circuit to perform boost processing; the above-mentioned first mode control module 5 can use a first mode control circuit composed of the first power tube Q1 circuit to control The connection status of the second power module 6 and the first power module 1; the above-mentioned second power module 6 can use an energy storage device to store and release electric energy; the above-mentioned second mode control module 7 can use a second power tube Q2 circuit composed of The second mode control circuit completes the transmission control of the input electric energy; the above-mentioned output control module 9 can use the third power tube Q3 circuit and the output circuit, and the third power tube Q3 circuit controls the electric energy of the input and output circuit, and the output circuit and Make connections using electrical equipment.

In another embodiment, please refer to Figures 2, 3 and 4. The first power module 1 includes a first power supply; the first boost module 4 includes a first capacitor C1, a first inductor L1, The first power tube Q1 and the first diode D1; the intelligent control module 2 includes a first controller U1;

Specifically, the first end of the first power supply is connected to one end of the first capacitor C1 and connected to the anode of the first diode D1 and the drain of the first power tube Q1 through the first inductor L1. The first diode The cathode of D1 is connected to the output control module 9, the gate of the first power tube Q1 is connected to the first IO terminal of the first controller U1, the other end of the first capacitor C1, the source of the first power tube Q1 and the first The second terminal of the power supply is both grounded.

In a specific embodiment, the above-mentioned first capacitor C1, first inductor L1, first power tube Q1 and first diode D1 form a Boost circuit, in which the first power tube Q1 can be an N-channel enhancement type MOS tube. ; The above-mentioned first controller U1 is optional, but is not limited to STM32 microcontroller. In order to meet the driving capability of the MOS tube, the first controller needs to be configured with a corresponding MOS tube driver (not shown), which will not be described in detail here.

Further, the first mode control module 5 includes a third power tube Q3, a first resistor R1 and a fourth power tube Q4; the second power module 6 includes a first energy storage device;

Specifically, the drain of the third power transistor Q3 is connected to the first end of the first power supply, and the source of the third power transistor Q3 is connected to one end of the first resistor R1, the source of the fourth power transistor Q4, and The first end and the second end of the first energy storage device are connected to the second mode control module 7 , and the other end of the first resistor R1 is connected to the gate of the fourth power tube Q4 . The drain of Q4 is connected to the ground, and the gate of the third power transistor Q3 is connected to the boost degree judging module 3 .

In a specific embodiment, the third power tube Q3 can be an N-channel enhancement type MOS tube, and the fourth power tube Q4 can be a P-channel enhancement type MOS tube; the first end of the first energy storage device is the positive terminal. , the second terminal of the first energy storage device is the negative terminal, so that when the third power tube Q3 is not conducting, the fourth power tube Q4 is in the conducting state.

Further, the voltage boosting degree judgment module 3 includes a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first operational amplifier OP1, a sixth resistor R6, a seventh resistor R7, a first Power supply VCC1, ninth resistor R9, eighth resistor R8, seventh power tube Q7;

Specifically, one end of the second resistor R2 is connected to the first end of the first power supply, and the other end of the second resistor R2 is connected to one end of the fourth resistor R4 and grounded through the third resistor R3. The fourth resistor R4 The other end is connected to the non-inverting end of the first operational amplifier OP1 and grounded through the fifth resistor R5. The inverting end of the first operational amplifier OP1 is connected to one end of the sixth resistor R6 and one end of the seventh resistor R7, and the other end of the seventh resistor R7 The source of the seventh power tube Q7 is connected to the ground through the eighth resistor R8, the drain of the seventh power tube Q7 is connected to the first power supply VCC1 through the ninth resistor R9, and the gate of the seventh power tube Q7 is connected to the first control The fifth IO terminal of the resistor U1 and the other terminal of the sixth resistor R6 are connected to the output terminal of the first operational amplifier OP1.

In a specific embodiment, the second resistor R2 and the third resistor R3 form a voltage sampling circuit; the fourth resistor R4, the fifth resistor R5, the first operational amplifier OP1, the sixth resistor R6 and the seventh resistor R7 form a subtraction circuit. , the first operational amplifier OP1 can be used, but is not limited to the OP07 operational amplifier; the ninth resistor R9, the eighth resistor R8, the seventh power tube Q7 and the first power supply VCC1 form a boost threshold adjustment circuit, and the seventh power tube Q7 can use an N-channel enhancement MOS transistor, and the final output boost threshold is adjusted by the first controller U1.

Further, the boost degree judgment module 3 also includes a tenth resistor R10, a first threshold device, a first comparator A1, an eleventh resistor R11 and a fourteenth resistor R14;

Specifically, one end of the tenth resistor R10 is connected to the output end of the first operational amplifier OP1, the other end of the tenth resistor R10 is connected to the non-inverting end of the first comparator A1, and the inverting end of the first comparator A1 is connected. The first threshold device, the output end of the first comparator A1 is connected to one end of the eleventh resistor R11 and the gate of the third power tube Q3, and the other end of the eleventh resistor R11 is connected to the first power supply VCC1. The output terminal of a comparator A1 is also connected to the seventh IO terminal of the first controller U1 through a fourteenth resistor R14.

In a specific embodiment, the tenth resistor R10, the first threshold device, the first comparator A1, and the eleventh resistor R11 form a comparison circuit to judge the degree of boosting of the input signal, in which the first comparator A1 can be selected. , but is not limited to the LM393 comparator.

Further, the second mode control module 7 includes a twelfth resistor R12, a first switching tube VT1, a second switching tube VT2, an eighth power tube Q8, a thirteenth resistor R13, and a ninth power tube Q9;

Specifically, one end of the twelfth resistor R12 is connected to the source of the eighth power tube Q8 and the first end of the first power supply, and the other end of the twelfth resistor R12 is connected to the gate of the eighth power tube Q8. The collector of the first switching tube VT1, the emitter of the first switching tube VT1 and the emitter of the second switching tube VT2 are all grounded, and the drain of the eighth power tube Q8 is connected to the source of the ninth power tube Q9 and the In the second boost module 8, the gate of the ninth power tube Q9 is connected to one end of the thirteenth resistor R13 and the collector of the second switching tube VT2, and the base of the second switching tube VT2 is connected to the base of the first switching tube VT1. and the sixth IO terminal of the first controller U1, and the other terminal of the thirteenth resistor R13 is connected to the drain of the ninth power tube Q9 and the second terminal of the first energy storage device.

In a specific embodiment, the above-mentioned first switching tube VT1 and the second switching tube VT2 can both use NPN transistors, where the first switching tube VT1 is used to control the conduction of the eighth power tube Q8, and the second switching tube VT2 is used to control the conduction of the eighth power tube Q8. Control the cutoff of the ninth power tube Q9; the eighth power tube Q8 can be a P-channel enhancement type MOS tube, and the ninth power tube Q9 can be an N-channel enhancement type MOS tube.

Further, the second boost module 8 includes a second inductor L2, a second capacitor C2, a sixth power transistor Q6 and a second diode D2;

Specifically, one end of the second inductor L2 is connected to one end of the second capacitor C2 and the source of the ninth power transistor Q9, and the other end of the second inductor L2 is connected to the drain of the sixth power transistor Q6 and the second second power transistor Q9. The anode of the diode D2 and the cathode of the second diode D2 are connected to the output control module 9. The source of the sixth power tube Q6 and the other end of the second capacitor C2 are both grounded. The gate of the sixth power tube Q6 is connected to the ground. The third IO terminal of the first controller U1.

In a specific embodiment, the above-mentioned second inductor L2 can choose an inductor device with more turns than the first inductor L1 and a longer coil than the first inductor L1, so as to provide a higher voltage boost range. The specific model is not limited; the above-mentioned The sixth power tube Q6 can be an N-channel enhancement type MOS tube.

Further, the output control module 9 includes a second power tube Q2, a fifth power tube Q5 and an output port;

Specifically, the drain of the second power tube Q2 and the drain of the fifth power tube Q5 are respectively connected to the cathode of the first diode D1 and the cathode of the second diode D2. The gate and the gate of the fifth power tube Q5 are respectively connected to the second IO terminal and the fourth IO terminal of the first controller U1, and the source of the second power tube Q2 is connected to the source and output of the fifth power tube Q5. port.

In a specific embodiment, the above-mentioned second power transistor Q2 and the fifth power transistor Q5 can both use N-channel enhancement type MOS transistors; the above-mentioned output port is used to connect with the power end of the electrical equipment, which will not be described in detail here.

The present invention is an adjustable voltage control circuit. The first controller U1 controls the conduction degree of the first power tube Q1 and the conduction of the second power tube Q2, so that the electric energy output by the first power supply passes through the first inductor L1. The voltage is boosted with the first diode D1 and transmitted to the output port. The second resistor R2 and the third resistor R3 sample the voltage of the first power supply. The fifth IO terminal of the first controller U1 controls the seventh power. The degree of conduction of tube Q7 provides the first operational amplifier OP1 with a boost threshold, which is the required boosted voltage. The first operational amplifier OP1 subtracts the input boost threshold and the sampled voltage signal. Processing, calculating the difference between the required boosted voltage and the voltage provided by the first power supply, and comparing the difference with the voltage threshold provided by the first threshold device, when the difference is greater than the voltage threshold, the circuit The voltage boosting process will be slower. At this time, the first comparator A1 will control the third power tube Q3 to turn on, causing the fourth power tube Q4 to turn off. The first energy storage device and the first power supply are connected in series to increase the input The voltage of the second inductor L2 speeds up the voltage boosting rate. At the same time, when the voltage boosting gap is large, the first controller U1 will control the work of the sixth power tube Q6 and the fifth power tube Q5. When it is necessary to improve the load capacity of the circuit And when the degree of voltage boosting is small, the third power tube Q3 is turned off and the second end of the first energy storage device is grounded. At this time, the first controller U1 controls the conduction of the first power tube Q1 and the sixth power tube Q6. degree, controlling the conduction work of the second power tube Q2 and the fifth power tube Q5, so that the first energy storage device and the first power supply supply power to the output port in parallel. When the first energy storage device has insufficient power, the first energy storage device can be powered by the first energy storage device. The sixth IO terminal of the controller U1 outputs a high level, controlling the first switching tube VT1, the second switching tube VT2 and the eighth power tube Q8 to conduct, and the ninth power tube Q9 to cut off, and the first power supply is the first energy storage When the device supplies power, the first controller U1 then controls the sixth power transistor Q6 and the fifth power transistor Q5 to operate, thereby increasing the voltage boosting range of the circuit and providing a higher range of voltage for the output port.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be regarded as illustrative and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is therefore intended that all claims falling within the claims All changes within the meaning and scope of equivalent elements are included in the present invention. Any reference signs in the claims shall not be construed as limiting the claim in question.

In addition, it should be understood that although this specification is described in terms of implementations, not each implementation only contains an independent technical solution. This description of the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole. , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (8)

1. An adjustable voltage control circuit, characterized in that:

the adjustable voltage control circuit comprises: the intelligent control system comprises a first power supply module, an intelligent control module, a boosting degree judging module, a first boosting module, a first mode control module, a second power supply module, a second mode control module, a second boosting module and an output control module;

the first power supply module is used for providing first direct-current electric energy;

the intelligent control module is connected with the boosting degree judging module, the first boosting module, the second mode control module and the output control module, and is used for outputting a first pulse signal, a second pulse signal and a third pulse signal and respectively controlling the working of the boosting degree judging module, the first boosting module and the second boosting module, outputting a first control signal and controlling the working of the second mode control module, and outputting a second control signal and a third control signal and controlling the working of the output control module;

the boosting degree judging module is connected with the first power supply module, and is used for providing a boosting threshold value, adjusting the boosting threshold value through the first pulse signal, sampling the first direct current energy and outputting a voltage signal, calculating a difference value by matching the voltage signal with the boosting threshold value, comparing the calculated difference value with a set voltage threshold value and outputting a fourth control signal;

the first boosting module is connected with the first power supply module and is used for receiving the second pulse signal and boosting the first direct current energy;

the first mode control module is connected with the boosting degree judging module and the second power module and is used for controlling the serial-parallel connection state of the second power module and the first power module through the fourth control signal;

the second mode control module is connected with the second power supply module and the first power supply module, and is used for receiving the first control signal and controlling the connection of the second power supply module and the second boost module, and is used for receiving the first control signal and transmitting the first direct current energy to the second power supply module;

the second power module is used for providing second direct current electric energy and storing the electric energy transmitted by the second mode control module;

the second boosting module is connected with the second power supply module and is used for receiving the third pulse signal and boosting the input electric energy output by the second power supply module;

the output control module is connected with the first boosting module and the second boosting module, and is used for receiving the second control signal and transmitting the electric energy output by the first boosting module to electric equipment, and is used for receiving the third control signal and transmitting the electric energy output by the second boosting module to the electric equipment.

2. The adjustable voltage control circuit of claim 1 wherein the first power module comprises a first power supply; the first boosting module comprises a first capacitor, a first inductor, a first power tube and a first diode; the intelligent control module comprises a first controller;

the first end of the first power supply is connected with one end of the first capacitor and connected with the anode of the first diode and the drain electrode of the first power tube through the first inductor, the cathode of the first diode is connected with the output control module, the grid electrode of the first power tube is connected with the first IO end of the first controller, and the other end of the first capacitor, the source electrode of the first power tube and the second end of the first power supply are grounded.

3. The adjustable voltage control circuit of claim 2 wherein the first mode control module comprises a third power tube, a first resistor, and a fourth power tube; the second power module comprises a first energy storage device;

the drain electrode of the third power tube is connected with the first end of the first power supply, the source electrode of the third power tube is connected with one end of the first resistor, the source electrode of the fourth power tube and the first end of the first energy storage device, the second end of the first energy storage device is connected with the second mode control module, the other end of the first resistor is connected with the grid electrode of the fourth power tube, the drain electrode of the fourth power tube is grounded, and the grid electrode of the third power tube is connected with the boosting degree judging module.

4. The adjustable voltage control circuit of claim 3 wherein the boost level determination module comprises a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first op-amp, a sixth resistor, a seventh resistor, a first power supply, a ninth resistor, an eighth resistor, and a seventh power tube;

one end of the second resistor is connected with the first end of the first power supply, the other end of the second resistor is connected with one end of the fourth resistor and grounded through the third resistor, the other end of the fourth resistor is connected with the in-phase end of the first operational amplifier and grounded through the fifth resistor, the inverting end of the first operational amplifier is connected with one end of the sixth resistor and one end of the seventh resistor, the other end of the seventh resistor is connected with the source electrode of the seventh power tube and grounded through the eighth resistor, the drain electrode of the seventh power tube is connected with the first power supply through the ninth resistor, the grid electrode of the seventh power tube is connected with the fifth IO end of the first controller, and the other end of the sixth resistor is connected with the output end of the first operational amplifier.

5. The adjustable voltage control circuit of claim 4 wherein the boost level determination module further comprises a tenth resistor, a first threshold device, a first comparator, an eleventh resistor, and a fourteenth resistor;

one end of the tenth resistor is connected with the output end of the first operational amplifier, the other end of the tenth resistor is connected with the same-phase end of the first comparator, the inverting end of the first comparator is connected with the first threshold device, the output end of the first comparator is connected with one end of the eleventh resistor and the grid electrode of the third power tube, the other end of the eleventh resistor is connected with the first power supply, and the output end of the first comparator is also connected with the seventh IO end of the first controller through the fourteenth resistor.

6. A voltage control circuit as claimed in claim 3 wherein the second mode control module comprises a twelfth resistor, a first switching tube, a second switching tube, an eighth power tube, a thirteenth resistor, a ninth power tube;

one end of the twelfth resistor is connected with the source electrode of the eighth power tube and the first end of the first power supply, the other end of the twelfth resistor is connected with the grid electrode of the eighth power tube and the collector electrode of the first switching tube, the emitter electrode of the first switching tube and the emitter electrode of the second switching tube are grounded, the drain electrode of the eighth power tube is connected with the source electrode of the ninth power tube and the second boosting module, the grid electrode of the ninth power tube is connected with one end of the thirteenth resistor and the collector electrode of the second switching tube, the base electrode of the second switching tube is connected with the base electrode of the first switching tube and the sixth IO end of the first controller, and the other end of the thirteenth resistor is connected with the drain electrode of the ninth power tube and the second end of the first energy storage device.

7. The adjustable voltage control circuit of claim 6 wherein the second boost module comprises a second inductor, a second capacitor, a sixth power tube, and a second diode;

one end of the second inductor is connected with one end of the second capacitor and the source electrode of the ninth power tube, the other end of the second inductor is connected with the drain electrode of the sixth power tube and the anode electrode of the second diode, the cathode electrode of the second diode is connected with the output control module, the source electrode of the sixth power tube and the other end of the second capacitor are grounded, and the grid electrode of the sixth power tube is connected with the third IO end of the first controller.

8. The adjustable voltage control circuit of claim 7 wherein the output control module comprises a second power tube, a fifth power tube and an output port;

the drain electrode of the second power tube and the drain electrode of the fifth power tube are respectively connected with the cathode of the first diode and the cathode of the second diode, the grid electrode of the second power tube and the grid electrode of the fifth power tube are respectively connected with the second IO end and the fourth IO end of the first controller, and the source electrode of the second power tube is connected with the source electrode of the fifth power tube and the output port.