Voltage conversion circuit and display device

Abstract

A voltage conversion circuit and a display device, the voltage conversion circuit comprising: a voltage output module, a power supply branch, a voltage conversion module and a switch module; the first end of the power supply branch is connected to a power supply, and the power supply branch converts the power supply electric energy output by the power supply into a first DC voltage; the dimming signal input end of the voltage conversion module is connected to a dimming control signal, and the modulation signal input end of the voltage conversion module is connected to a pulse width modulation signal, and the voltage conversion module generates a voltage drive signal according to the dimming control signal, and generates a switch control signal according to the pulse width modulation signal; the switch module is connected between the voltage conversion module and the power supply branch, and the switch module performs overvoltage protection on the power supply branch according to the switch control signal; the voltage output module is connected to the second end of the power supply branch, the voltage conversion module and the electrical equipment, and the voltage output module outputs a second DC voltage according to the first DC voltage and the voltage drive signal, so that the electrical equipment is in a rated working state.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic circuits, and in particular, relates to a voltage conversion circuit and a display device. Background Art

[0002] Voltage conversion technology is widely used in electronic devices. Due to the diversity of people's needs, the rated working conditions of different types of electronic devices are also different. Therefore, technicians need to use voltage conversion technology to convert the same type of electrical energy into an operating voltage that meets the safe operation requirements of electronic equipment to ensure that the electronic equipment can always be in a stable state. The voltage conversion circuit can ensure that the power system can be compatible with the power supply needs of various types of electronic equipment, and different electronic components are connected to the converted electrical energy to meet the different circuit function requirements of users. Therefore, the development of voltage conversion technology has brought great convenience to the use of electronic equipment, saved the power supply cost of electronic equipment, and facilitated people's production and life.

[0003] The voltage conversion circuit in the traditional technology needs to control the current size through the electric field effect. For example, the technicians control the voltage conversion process through the MOS tube. When the gate of the MOS tube is connected to the current, the MOS tube is turned on or off by the current, so that the voltage conversion circuit can convert and output the corresponding working voltage according to the actual needs of the user; therefore, the voltage conversion circuit needs to turn on and off itself to meet the needs of working voltages of different amplitudes. In this process, the voltage conversion circuit in the traditional technology has at least the following two deficiencies:

[0004] 1. The voltage conversion circuit is designed and manufactured individually according to a specific electronic device. Once the voltage conversion circuit is designed, the voltage conversion circuit can only output a working voltage of a specific amplitude, or the amplitude range of the working voltage output by the voltage conversion circuit is narrow. As a result, the voltage conversion performance of the traditional voltage conversion circuit is less flexible, the operability is not high, and the performance is unstable.

[0005] 2. The traditional voltage conversion circuit only has the voltage conversion function. Since faults are prone to occur during the voltage conversion process, the operating voltage in the voltage conversion circuit is prone to overvoltage / overcurrent operating state. If the overvoltage state in the voltage conversion circuit cannot be suppressed, the voltage conversion circuit will produce great power loss, and in severe cases, it may even completely burn out the voltage conversion circuit; therefore, the safety of the voltage conversion circuit in traditional technology is relatively low.

[0006] In summary, the voltage conversion circuit in traditional technology has low flexibility and poor stability in voltage conversion, cannot realize the overvoltage protection function of its own electronic components, has low safety performance, and provides poor user experience. Summary of the invention

[0007] In view of this, an embodiment of the present application provides a voltage conversion circuit and a display device, which aim to solve the problems existing in the exemplary technology, such as poor stability of voltage conversion, low flexibility, inability to achieve overvoltage protection of its own electronic components, low circuit safety performance, and reduced user experience.

[0008] A first aspect of an embodiment of the present application provides a voltage conversion circuit, including:

[0009] A power supply branch, wherein a first terminal of the power supply branch is connected to a power supply, and the power supply branch converts power supply energy output by the power supply into a first DC voltage;

[0010] A voltage conversion module, wherein a dimming signal input terminal of the voltage conversion module is connected to a dimming control signal, a modulation signal input terminal of the voltage conversion module is connected to a pulse width modulation signal, and the voltage conversion module generates a voltage driving signal according to the dimming control signal, and generates a switch control signal according to the pulse width modulation signal;

[0011] a switch module, the switch module being connected between the voltage conversion module and the power supply branch, and the switch module performing overvoltage protection on the power supply branch according to the switch control signal; and

[0012] A voltage output module is connected to the second end of the power supply branch, the voltage conversion module and the electrical equipment. The voltage output module outputs a second DC voltage according to the first DC voltage and the voltage drive signal to put the electrical equipment in a rated working state.

[0013] In one embodiment, the power supply branch includes:

[0014] A first filtering module, the first filtering module is connected to the power supply, and the first filtering module performs filtering processing on the power supply;

[0015] A boost module, the boost module is connected to the first filter module, the voltage conversion module and the switch module, and the boost module boosts the filtered power supply energy according to the switch control signal to obtain the first DC voltage;

[0016] a rectifier module, the rectifier module is connected to the boost module, and the rectifier module rectifies the first DC voltage; and

[0017] The second filtering module is connected to the rectifying module and the voltage output module, and the second filtering module filters the rectified first DC voltage and then outputs it.

[0018] In one embodiment, the boost module includes a first inductor, a first switch tube, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor;

[0019] The first end of the first inductor is connected to the first filtering module, the second end of the first inductor and the first conducting end of the first switch tube are commonly connected to the rectifier module, the first end of the first resistor, the first end of the second resistor, the first end of the third resistor, the first end of the fourth resistor and the first end of the fifth resistor are commonly connected to the second conducting end of the first switch tube, and the second end of the second resistor, the second end of the third resistor, the second end of the fourth resistor and the second end of the fifth resistor are commonly connected to the ground;

[0020] The second end of the first resistor and the control end of the first switch tube are connected to the voltage conversion module and the switch module, and the second end of the first resistor and the control end of the first switch tube are connected to the switch control signal.

[0021] In one embodiment, the first conducting end of the switch module is connected to the control end of the first switch tube, the second conducting end of the switch module is grounded, and the control end of the switch module is connected to the voltage conversion module;

[0022] The switch module performs overvoltage protection on the first switch tube when the first switch tube is turned off according to the switch control signal.

[0023] In one embodiment, the switch module includes a second switch tube, a sixth resistor, a seventh resistor and an eighth resistor;

[0024] The first conducting end of the second switch tube and the first end of the sixth resistor are connected together to form the first conducting end of the switch module;

[0025] The control end of the second switch tube is connected to the first end of the seventh resistor;

[0026] The second end of the sixth resistor and the second end of the seventh resistor are connected together to form a control end of the switch module;

[0027] The second conducting end of the second switch tube is connected to the first end of the eighth resistor;

[0028] The second end of the eighth resistor is the second conduction end of the switch module;

[0029] Wherein, when the first switch tube is turned off, the second switch tube is turned on.

[0030] In one embodiment, the first filtering module includes at least one first capacitor;

[0031] The rectifier module comprises a first diode, an anode of the first diode is connected to the boost module, and a cathode of the first diode is connected to the second filter module;

[0032] The second filtering module includes at least one second capacitor.

[0033] In one embodiment, the voltage output module includes a connector;

[0034] The first signal input terminal of the connector is connected to the power supply branch, the second signal input terminal of the connector is connected to the voltage conversion module, and the signal output terminal of the connector is connected to the power-consuming device.

[0035] In one embodiment, the voltage conversion module includes a voltage conversion chip;

[0036] The dimming signal input pin of the voltage conversion chip is connected to the dimming control signal, the modulation signal input pin of the voltage conversion chip is connected to the pulse width modulation signal, the gate pin of the voltage conversion chip is connected to the switch module, and the drive signal output pin of the voltage conversion chip is connected to the voltage output module.

[0037] In one embodiment, the electrical device is a light bar or a motor.

[0038] A second aspect of an embodiment of the present application provides a display device, including:

[0039] The voltage conversion circuit as described above; and

[0040] A backlight source is connected to the voltage conversion circuit, and the voltage conversion circuit outputs direct current power to the backlight source so that the backlight source is in a rated working state.

[0041] The above-mentioned voltage conversion circuit can realize the conversion of power supply electric energy through the power supply branch to output a stable first DC voltage; wherein the voltage conversion module can change the working state of the voltage conversion circuit according to the dimming control signal and the pulse width control signal, and the dimming control signal and the pulse width control signal contain the control information of the technician, so that the voltage conversion circuit can output a second DC voltage of a specific amplitude according to the actual needs of the technician, with high flexibility, and thus the voltage conversion circuit has good controllability and power conversion stability, and the electrical equipment can always be in the rated working state; at the same time, the switch module performs overvoltage protection on the power supply branch according to the switch control signal, so that each electronic component in the voltage conversion circuit is always in a safe and stable working state, which not only reduces the power loss of the voltage conversion circuit, but also ensures the safety performance and universal applicability of the voltage conversion, improves the safety and reliability of the voltage conversion circuit, and brings a good user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0043] Figure 1 A schematic diagram of the structure of a voltage conversion circuit provided in one embodiment of the present application;

[0044] Figure 2 A schematic diagram of the structure of a power supply branch provided in an embodiment of the present application;

[0045] Figure 3 A circuit structure diagram of a boost module provided in one embodiment of the present application;

[0046] Figure 4 A schematic diagram of the structure of a switch module provided in one embodiment of the present application;

[0047] Figure 5 A circuit structure diagram of a switch module provided in an embodiment of the present application;

[0048] Figure 6 A circuit structure diagram of a voltage conversion module provided in one embodiment of the present application;

[0049] Figure 7 A schematic diagram of the structure of a display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0051] See also Figure 1 The voltage conversion circuit 10 provided in the embodiment of the present application can realize the conversion function of the voltage amplitude, so that the converted voltage can be applied to different types of electrical equipment 20, thereby ensuring the working safety and stability of the electrical equipment 20; for the convenience of explanation, only the part related to the present embodiment is shown, which is described in detail as follows:

[0052] The voltage conversion circuit 10 includes: a power supply branch 101, a voltage conversion module 102, a switch module 103 and a voltage output module 104.

[0053] A first terminal of the power supply branch 101 is connected to a power supply VP, and the power supply branch 101 converts power energy output by the power supply VP into a first DC voltage.

[0054] Among them, the power supply branch 101 in this embodiment can realize the functions of power transmission and power conversion. The amplitude of the power supply power can be converted through the voltage conversion circuit 10. Exemplarily, the power supply branch 101 can be used to boost or reduce the voltage, and then the first DC voltage output by the power supply branch 101 can provide stable power, so that the electronic components can be in a stable and safe working state under the drive of the first DC voltage, thereby reducing the cost of voltage conversion; therefore, this embodiment can access the power supply power through the power supply branch 101, and the power supply power can drive the voltage conversion circuit 10 to be in a safe and stable working state, thereby ensuring the continuity and reliability of voltage conversion.

[0055] As an optional implementation, the power supply VP is a +30V~+50V DC power supply. The DC power is output through the power supply VP, which ensures the power supply security of the voltage conversion circuit 10. The voltage conversion circuit 10 can convert the power supply power into DC power of different amplitudes, reducing the cost of power conversion. At the same time, the voltage conversion circuit 10 in this embodiment can be applied to different types of power systems to realize the corresponding voltage conversion function, and has strong compatibility.

[0056] The dimming signal input terminal of the voltage conversion module 102 is connected to the dimming control signal A1, and the modulation signal input terminal of the voltage conversion module 102 is connected to the pulse width modulation signal A2. The voltage conversion module 102 generates a voltage driving signal according to the dimming control signal A1, and generates a switch control signal B2 according to the pulse width modulation signal A2.

[0057] As an optional implementation, the dimming control signal A1 is generated by the dimming control circuit in the exemplary technology, wherein the dimming control circuit in the exemplary technology includes electronic components such as an optical coupler, and the optical coupler can convert the non-electrical signal into an electrical signal, thereby adjusting the voltage conversion performance of the voltage conversion circuit 10, so that the voltage conversion circuit 10 has good controllable performance; the pulse width modulation signal A2 is generated by the pulse width modulation (Pulse Width The pulse width modulation (PWM) circuit in the exemplary technology includes: MOS tubes, electronics, diodes and other electronic components, and generates pulse width modulation signals A2 with different amplitudes or pulse width modulation signals A2 with different duty cycles through the pulse width modulation circuit. When the operating parameters (amplitude or duty cycle, etc.) of the pulse width modulation signal A2 change, the voltage conversion module 102 can generate the corresponding switch control signal B2, and the voltage conversion performance of the voltage conversion circuit 10 has good controllability. In this embodiment, the working state of the voltage conversion circuit 10 can be changed in real time through the dimming control signal A1 and the pulse width modulation signal A2, and the sensitivity is extremely high, so that the voltage conversion circuit 10 can generate a voltage of corresponding amplitude according to the needs of technicians, and the control flexibility of the voltage conversion circuit 10 is relatively strong.

[0058] The voltage conversion module 102 in this embodiment has the performance of centralized signal processing and analysis. The control information of the dimming control signal A1 and the pulse width modulation signal A2 can be parsed through the voltage conversion module 102 to output the voltage drive signal B1 and the switch control signal B2; the voltage conversion module 102 has a good signal conversion function. The voltage conversion performance of the voltage conversion circuit 10 can be changed in real time through the voltage drive signal B1 and the switch control signal B2, so that the voltage conversion circuit 10 can output the rated voltage of the corresponding amplitude according to the actual needs of the technicians, thereby ensuring the working stability and safety of the electrical equipment 20. The voltage conversion module 102 has good operational compatibility and controllability, and the user experience is higher.

[0059] The switch module 103 is connected between the voltage conversion module 102 and the power supply branch 101 , and the switch module 103 performs overvoltage protection on the power supply branch 101 according to the switch control signal B2 .

[0060] The power supply branch 101 can realize voltage conversion to change the amplitude of electric energy; and in actual application, the power supply branch 101 needs to be frequently turned on or off, and then a large transient electric energy will appear in the power supply branch 101, such as a large transient voltage or transient current will appear in the power supply branch 101, and the power supply branch 101 is very likely to be in an overvoltage state; the switch module 103 can play the role of overvoltage protection in the voltage conversion circuit 10. When the power supply branch 101 is in an overvoltage operation state, the charge in the power supply branch 101 can be discharged in time through the switch module 103, so that the voltage of the power supply branch 101 is always in a safe state, and the power supply branch 101 can realize a safe and stable power conversion function, thereby ensuring the physical safety performance of electronic components; when the voltage conversion module 102 controls the switch When the control signal B2 is output to the power supply branch 101, the switch control signal B2 can drive the switch module 103 to implement the corresponding overvoltage protection function, so as to adaptively ensure the voltage conversion safety of the voltage conversion circuit 10; illustratively, when the switch control signal B2 is in the first level state, the switch module 103 immediately takes overvoltage protection for the power supply branch 101; when the switch control signal B2 is in the second level state, the switch module 103 cannot take overvoltage protection for the power supply branch 101; therefore, the power supply branch 101 in this embodiment has high control sensitivity and control response speed, and the switch module 103 can prevent the power supply branch 101 from being in an overvoltage operating state, so that the voltage conversion circuit 10 can output a safe voltage, thereby improving the voltage conversion reliability and compatibility of the power supply branch 101.

[0061] The voltage output module 104 is connected to the second end of the power supply branch 101, the voltage conversion module 102 and the power-consuming device 20. The voltage output module 104 outputs a second DC voltage according to the first DC voltage and the voltage driving signal B1 to put the power-consuming device 20 in a rated working state.

[0062] The second end of the power supply branch 101 outputs the first DC voltage to the voltage output module 104, and the voltage conversion module 102 outputs the voltage drive signal B1 to the voltage output module 104, wherein the voltage output module 104 is compatible with different types of electrical equipment 20 to achieve power transmission between the voltage output module 104 and the electrical equipment 20; the voltage drive signal B1 includes voltage drive information, and the voltage output module 104 can combine the first DC voltage and the voltage drive signal B1 to output a second DC voltage of corresponding amplitude, and the amplitude of the second DC voltage can fully meet the rated power requirement of the electrical equipment 20, thereby ensuring the power consumption of the electrical equipment 20. The power safety performance of the electrical equipment 20; the voltage conversion circuit 10 in this embodiment can output the corresponding second DC voltage according to the operation information of the technician, so that the amplitude of the second DC voltage has a wider adjustment range and higher adjustment stability, and the second DC voltage can drive the electrical equipment 20 to be in a rated working state; and then the voltage output module 104 can be compatible with different types of electrical equipment 20, the amplitude of the second DC voltage has a higher adjustable performance, and the voltage after voltage conversion by the voltage conversion circuit 10 can be applicable to various types of electrical equipment 20, and the voltage conversion circuit 10 has a wider range of use.

[0063] exist Figure 1In the structure of the voltage conversion circuit 10 shown, the voltage conversion circuit 10 has a relatively simplified structure, and the interactive transmission of electric energy with the electrical equipment 20 can be realized through the voltage output module 104, thereby ensuring the universal applicability of the voltage conversion circuit 10; the technician can transmit the control information to the voltage conversion circuit 10 through the dimming control signal A1 and the pulse width control signal A2, so that the voltage conversion circuit 10 performs voltage conversion according to the technician's operation information, and the second DC voltage output by the voltage output module 104 can make different types of electrical equipment 20 in the rated working state, the voltage conversion compatibility is strong, and the voltage conversion performance of the voltage conversion circuit 10 in this embodiment is highly controllable and flexible, the voltage conversion circuit 10 outputs the converted voltage to meet the actual circuit function requirements of the technician, and the electrical equipment 20 can always be in a safe and stable working state; at the same time, during the voltage conversion process of the power supply branch 101, The switch module 103 can perform overvoltage protection on the power supply branch 101 in real time, and the electronic components in the power supply branch 101 are always in a safe and reliable operating state. The voltage conversion circuit 10 can continuously perform voltage conversion, and the safety performance and stability performance during the voltage conversion process are stronger. The converted electric energy is output to the electrical equipment 20 through the voltage conversion circuit 10, so that the electrical equipment 20 can be in the rated operating state for a long time. The voltage conversion circuit 10 can be applied to various different industrial technical fields. Different types of voltage conversion functions can be realized through the voltage conversion circuit 10, the user experience is better, and the power safety performance of the electrical equipment 20 is higher; it effectively solves the problems of low voltage conversion stability of the voltage conversion circuit in the exemplary technology, narrow adjustable range of the voltage amplitude after conversion, poor user experience, low compatibility, and the inability of the voltage conversion circuit in the exemplary technology to achieve its own overvoltage protection, low safety and stability.

[0064] As an optional implementation, Figure 2 The structure of the power supply branch 101 provided in this embodiment is shown in FIG. Figure 2 The power supply branch 101 includes: a first filtering module 1011, a boost module 1012, a rectifier module 1013 and a second filtering module 1014.

[0065] The first filtering module 1011 is connected to the power supply VP, and the first filtering module 1011 performs filtering processing on the power supply energy.

[0066] The power supply energy output by the power supply VP can enable the power supply branch 101 to realize the corresponding voltage conversion function, and because the power supply energy output by the external power supply VP contains a lot of noise, this noise will cause great interference to the power conversion process of the power supply branch 101, affecting the accuracy of the power conversion; therefore, the first filtering module 1011 can timely filter out the noise in the power supply energy, and then the power supply energy after filtering has a higher power accuracy; for example, the first filtering module 1011 can timely filter out the AC component in the power supply energy, and the power supply branch 101 can accurately convert the power supply energy after filtering, thereby improving the voltage conversion accuracy of the power supply branch 101; and then the voltage conversion circuit 10 in this embodiment can convert the power supply energy into DC voltages of different amplitudes, and the DC voltage after voltage conversion has higher accuracy and stability, and the power supply branch 101 has better voltage conversion performance, which is beneficial to improving the reliability and application scope of the voltage conversion circuit 10 and reducing the error of voltage conversion.

[0067] The boost module 1012 is connected to the first filter module 1011 , the voltage conversion module 102 and the switch module 103 , and the boost module 1012 boosts the filtered power supply energy according to the switch control signal B2 to obtain the first DC voltage.

[0068] In this embodiment, the boost module 1012 has a boost function. When the voltage conversion module 102 outputs the switch control signal B2 to the boost module 1012, the working state of the boost module 1012 can be controlled by the switch control signal B2; illustratively, the boost module 1012 realizes the corresponding boost function according to the level state of the switch control signal B2, thereby ensuring the controllability and flexibility of the boost module 1012; when the voltage input end of the boost module 1012 is connected to the filtered power supply energy, the filtered power supply energy is boosted and converted by the boost module 1012 to change the amplitude of the power supply energy. The boost module 1012 can perform corresponding power conversion according to the actual needs of the technicians. The first DC voltage has a specific amplitude, and then the boost module 1012 in this embodiment can realize the boost effect according to the circuit function requirements of the technicians, thereby accelerating the boost conversion rate of the power supply branch 101. In this embodiment, the working state of the boost module 1012 has good controllability, thereby ensuring the boost conversion performance of the voltage conversion circuit 10.

[0069] During the boost conversion process of the boost module 1012, the switch module 103 can perform overvoltage protection on the boost module 1012 to prevent the boost module 1012 from being in an overvoltage operation state for a long time; therefore, the boost module 1012 in this embodiment has higher working stability, and the first DC voltage output by the boost module 1012 can maintain a safe amplitude range for a long time.

[0070] The rectifying module 1013 is connected to the boosting module 1012 , and the rectifying module 1013 rectifies the first DC voltage.

[0071] The boost module 1012 outputs the first DC voltage to the rectifier module 1013. After the boosting effect of the boost module 1012, the first DC voltage output by the boost module 1012 has a large noise component. The rectifier module 1013 can eliminate the harmonics and electromagnetic interference components in the first DC voltage. After the DC power is rectified by the rectifier module 1013, the first DC voltage output by the rectifier module 1013 has a more stable and safe threshold, thereby ensuring the voltage conversion safety of the power supply branch 101. The rectifier module 1013 in this embodiment can improve the power transmission efficiency and power transmission quality of the first DC voltage, and the power output by the voltage conversion circuit 10 has safer performance.

[0072] The second filtering module 1014 is connected to the rectifying module 1013 and the voltage output module 104 , and the second filtering module 1014 filters the rectified first DC voltage and outputs the filtered voltage.

[0073] Among them, the second filtering module 1014 can completely eliminate the AC component in the first DC voltage, and the second filtering module 1014 outputs DC power with higher precision. After the power supply branch 101 performs operations such as step-up conversion and rectification on the electric energy, the amplitude of the first DC voltage can be made to fully meet the actual needs of the technicians through filtering, and the first DC voltage output by the power supply branch 101 has higher electric power, which is beneficial to improving the voltage conversion accuracy of the voltage conversion circuit 10 for the power supply electric energy, and the voltage conversion efficiency is higher. The power supply branch 101 has higher compatibility and scope of application.

[0074] exist Figure 2 The structure of the power supply branch 101 is shown. The power supply branch 101 has a good voltage conversion function, and the power supply branch 101 adopts 4 circuit modules (a first filter module 1011, a boost module 1012, a rectifier module 1013 and a second filter module 1014) to realize the conversion function of the power supply electric energy. The voltage conversion efficiency is extremely high. The first DC voltage output by the power supply branch 101 has high accuracy and stability, and the electric energy amplitude output by the second filter module 1014 can meet the electric energy demand of the voltage output module 104. The electric energy output by the voltage output module 104 has higher power quality and is easy to operate. The electric energy output by the voltage conversion circuit 10 in this embodiment can use the electrical equipment 20 in the rated operating state. The voltage conversion circuit 10 has better power conversion performance and a wider range of applications.

[0075] As an optional implementation, Figure 3 The specific circuit structure of the boost module 1012 provided in this embodiment is shown. Figure 3 The boost module 1012 includes a first inductor L1, a first switch tube M1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a fifth resistor R5.

[0076] The first end of the first inductor L1 is connected to the first filtering module 1011, and the first end of the first inductor L1 is connected to the power supply energy after filtering; the second end of the first inductor L1 and the first conduction end of the first switch tube M1 are commonly connected to the rectifier module 1013, the first end of the first resistor R1, the first end of the second resistor R2, the first end of the third resistor R3, the first end of the fourth resistor R4 and the first end of the fifth resistor R5 are commonly connected to the second conduction end of the first switch tube M1, and the second end of the second resistor R2, the second end of the third resistor R3, the second end of the fourth resistor R4 and the second end of the fifth resistor R5 are commonly connected to the ground GND.

[0077] The second end of the first resistor R1 and the control end of the first switch tube M1 are connected to the voltage conversion module 102 and the switch module 103 , and the second end of the first resistor R1 and the control end of the first switch tube M1 are connected to the switch control signal B2 .

[0078] Optionally, the first switch tube M1 is a MOS tube or a triode, and the on or off state between the first conduction end of the first switch tube M1 and the second conduction end of the first switch tube M1 can be changed by the switch control signal B2, so that the first switch tube M1 can realize the function of voltage amplification; illustratively, the first switch tube M1 is an NMOS tube, Figure 3 In the circuit structure of the boost module 1012 shown, the drain of the NMOS tube is the first conduction end of the first switch tube M1, the gate of the NMOS tube is the control end of the first switch tube M1, and the source of the NMOS tube is the second conduction end of the first switch tube M1; when the switch control signal B2 is in the first level state, the first switch tube M1 is turned on, and when the switch control signal B2 is in the second level state, the first switch tube M1 is turned off; therefore, in this embodiment, the on or off state of the first switch tube M1 can be changed by the level state of the switch control signal B2, so that the boost module 1012 can achieve the corresponding boost function; and furthermore, the boost module 1012 in this embodiment has good controllability, and the boost module 1012 can achieve the corresponding boost function according to the operation instructions of the technician, bringing a better user experience to the user.

[0079] In this embodiment, the boost module 1012 utilizes the boosting effect of the first inductor L1 and the boosting effect of the first switch tube M1. When the first filter module 1011 transmits the power supply energy to the first inductor L1, the first switch tube M1 can be turned on or off through the switch control signal B2. After the boosting effect, the first DC voltage output by the boost module 1012 has a higher amplification factor, and the first DC voltage has a higher power quality; therefore, the boost module 1012 has a relatively simplified circuit structure, and the first inductor L1 and the first switch tube M1 can accurately boost the power supply energy after filtering, thereby ensuring the accuracy of power amplification. The boost module 1012 can achieve a higher boosting efficiency for the power, and the power conversion quality is better. The circuit structure of the voltage conversion circuit 10 is more simplified, and the voltage conversion process has better controllability.

[0080] As an optional implementation, Figure 4 The structure of the switch module 103 provided in this embodiment is shown in FIG. Figure 4 The switch module 103 includes: a first conduction terminal C1, a second conduction terminal C2 and a control terminal C3; wherein the first conduction terminal C1 of the switch module 103 is connected to the control terminal of the first switch tube M1, the second conduction terminal C2 of the switch module 103 is grounded GND, and the control terminal C3 of the switch module 103 is connected to the voltage conversion module 102.

[0081] The switch module 103 performs overvoltage protection on the first switch tube M1 when the first switch tube M1 is turned off according to the switch control signal B2.

[0082] The switch module 103 does not perform overvoltage protection on the first switch tube M1 when the first switch tube M1 is turned on according to the switch control signal B2.

[0083] In this embodiment, the voltage conversion module 102 can transmit the switch control signal B2 to the control terminal C3 of the switch module 103, and the working state of the switch module 103 can be changed through the switch control signal B2, so that the switch module 103 can perform overvoltage protection on the first switch tube M1 in real time, so that the boost module 1012 can achieve a normal and stable boost function, and ensure the physical safety performance of the first switch tube M1; in the process of boosting the electric energy by the boost module 1012, the first switch tube M1 is frequently turned on or off according to the actual needs of the technicians; when the first switch tube M1 is at the moment of being turned off, the control terminal of the first switch tube M1 will accumulate a large charge, resulting in a large voltage at the control terminal of the first switch tube M1, and the first switch tube M1 is in an overvoltage operation state. This overvoltage operation state will cause serious damage to the physical safety of the first switch tube M1; if the first switch tube M1 is in an overvoltage state for a long time In the running state, the first switch tube M1 will be completely burned due to excessive heat; therefore, at the moment when the first switch tube M1 is turned off, the charge of the control end of the first switch tube M1 can be discharged through the switch module 103, so that the voltage of the control end of the first switch tube M1 is always in a safe operating state, and the peak current of the control end of the first switch tube M1 is transmitted to the ground GND through the switch module 103, thereby ensuring the physical safety performance and working stability of the first switch tube M1; furthermore, in this embodiment, the first switch tube M1 can be timely protected from overvoltage through the switch module 103, and the first switch tube M1 can be frequently safely turned on or turned off, and the boost module 1012 has a high overvoltage protection response speed for the first switch tube M1. The boost module 1012 can output the corresponding first DC voltage according to the actual needs of the technicians, and the boost safety performance of the first switch tube M1 is greatly improved through the switch module 103, and the safety level is higher.

[0084] As an optional implementation, Figure 5 The specific circuit structure of the switch module 103 provided in this embodiment is shown in FIG. Figure 5 The switch module 103 includes a second switch tube Q1, a sixth resistor R6, a seventh resistor R7 and an eighth resistor R8.

[0085] The first conduction end of the second switch tube Q1 and the first end of the sixth resistor R6 are connected together to form the first conduction end of the switch module 103 .

[0086] The control end of the second switch tube Q1 is connected to the first end of the seventh resistor R7.

[0087] The second end of the sixth resistor R6 and the second end of the seventh resistor R7 are connected together to form a control end of the switch module 103 .

[0088] The second conduction end of the second switch tube Q1 is connected to the first end of the eighth resistor R8.

[0089] The second end of the eighth resistor R8 is the second conducting end of the switch module 103 .

[0090] Wherein, when the first switch tube M1 is turned off, the second switch tube Q1 is turned on.

[0091] When the first switch tube M1 is closed, the second switch tube Q1 is turned off; therefore, in this embodiment, the first switch tube M1 and the second switch tube Q1 have completely opposite power conduction polarities. Therefore, when the control end of the first switch tube M1 and the control end of the second switch tube Q1 are connected to the switch control signal B2, the first switch tube M1 and the second switch tube Q1 can be simultaneously controlled to be turned on or off by the switch control signal B2, so that the switch module 103 can perform overvoltage protection on the first switch tube M1, so that the boost module 1012 can stably boost the power supply energy after filtering, and the safety performance is extremely high.

[0092] Optionally, the second switch tube Q1 is a MOS tube or a triode, and the on or off state of the second switch tube Q1 can be changed in real time through the level state of the switch control signal B2. For example, when the duty cycle of the switch control signal B2 changes, the on time of the second switch tube Q1 will also change accordingly, and the switch module 103 has good controllability; illustratively, the second switch tube Q1 is a PNP type triode, the emitter of the PNP type triode is the first conduction end of the second switch tube Q1, the base of the PNP type triode is the control end of the second switch tube Q1, and the emitter of the PNP type triode is the second conduction end of the second switch tube Q1; and then the on or off state of the PNP type triode can be changed in real time through the level state of the switch control signal B2, so that the switch module 103 can discharge the control end charge of the first switch tube M1 in time, and the switch module 103 has a relatively simplified circuit structure.

[0093] In order to better illustrate the principle of the switch module 103 performing overvoltage protection on the first switch tube M1, the following is a schematic diagram of the embodiment of the present invention. Figure 3 To Attachment Figure 5 The working process of the switch module 103 is explained by a specific example, as follows:

[0094] When the switch control signal B2 is in the first level state, the first switch tube M1 is turned on and the second switch tube Q1 is turned off. At this time, the first conduction end and the second conduction end of the second switch tube Q1 are in an open circuit state. The boost module 1012 can boost the electric energy through the first inductor L1 and the first switch tube M1. At this time, the voltage at the control end of the first switch tube M1 is in a normal state. The second switch tube Q1 cannot perform overvoltage protection on the first switch tube M1. The boost module 1012 can boost the power supply electric energy after filtering, thereby ensuring the efficiency of electric energy conversion and reducing the power consumption of electric energy conversion.

[0095] When the switch control signal B2 is in the second level state, the first switch tube M1 is turned off and the second switch tube Q1 is turned on. At the moment when the first switch tube M1 is turned off, the control end of the first switch tube M1 has a higher voltage. At this time, the first conduction end and the second conduction end of the second switch tube Q1 are in a short-circuit state, and the charge of the control end of the first switch tube M1 passes through: the first conduction end of the second switch tube Q1, the second conduction end of the second switch tube Q1 and the eighth resistor R8, and is discharged to the ground GND in sequence, so that the voltage of the control end of the first switch tube M1 can be quickly reduced to a safe range, preventing the first switch tube M1 from being in an overvoltage operation state, so as to realize the overvoltage protection function for the first switch tube M1. Therefore, in this embodiment, the second switch tube Q1 can timely ensure the shutdown safety performance of the first switch tube M1, the first switch tube M1 has a higher physical safety performance, and the boost module 1012 can be in a safe and stable operation state, thereby ensuring the voltage conversion safety performance of the voltage conversion circuit 10.

[0096] Therefore Figure 5The circuit structure of the switch module 103 is shown. The on or off state of the second switch tube Q1 can be changed in real time through the switch control signal B2. The on or off condition of the second switch tube Q1 is used to quickly discharge the voltage of the control end of the first switch tube M1, so as to avoid the first switch tube M1 being in an overvoltage operation state for a long time, so that the first switch tube M1 can maintain a safe state at the moment of shutting down. At the same time, if the first switch tube M1 is not in the moment of shutting down, the switch module 103 will not perform overvoltage protection on the first switch tube M1, and the boost module 1012 can be in a normal working state. Therefore, the switch module 103 in this embodiment does not affect the working efficiency of the first switch tube M1, and can play a role. The first switch tube M1 has an overvoltage protection function at the moment of shutdown; therefore, the switch module 103 in this embodiment has a relatively simplified circuit structure, and the first switch tube M1 can be quickly protected from overvoltage through the second switch tube Q1. The response speed to the overvoltage state is extremely fast, which greatly improves the safety performance of the first switch tube M1. The boost module 1012 can safely boost the power supply energy after filtering, reduce the power loss of the power supply branch 101 during the voltage conversion process, and improve the conversion efficiency and conversion safety of the voltage conversion circuit 10 for power. The first switch tube M1 has a low noise characteristic during the boost process to make the voltage conversion performance better. The voltage conversion circuit 10 can be applied to various industrial fields.

[0097] As an optional implementation, the first filtering module 1011 includes at least one first capacitor; according to the "DC blocking and AC passing" principle of the capacitor, when the first capacitor is connected to the power supply energy, the AC component of the power supply energy can be removed in time through the first capacitor to ensure that the first filtering module 1011 can output DC power and improve the accuracy of the power.

[0098] The rectifier module 1013 includes a first diode, an anode of the first diode is connected to the boost module 1012, and a cathode of the first diode is connected to the second filter module 1014; wherein the first diode has unidirectional conductivity, and if there is an AC component in the first DC voltage, the first diode can prevent the AC component in the first DC voltage from passing through the rectifier module 1013. The rectifier module 1013 has an extremely simplified circuit structure, and has extremely high rectification accuracy for the first DC voltage, thereby ensuring the voltage conversion accuracy of the power supply branch 101, and the power supply branch 101 has higher circuit structure compatibility.

[0099] The second filtering module 1014 includes at least one second capacitor; optionally, the technician can select the number of second capacitors in the second filtering module 1014 according to the specific application scenario. The circuit structure of the second filtering module 1014 has extremely strong compatibility, and can perform safe and accurate filtering on the rectified first DC voltage. The first DC voltage output by the power supply branch 101 has higher accuracy. The power supply branch 101 can output a first DC voltage of corresponding amplitude according to the actual needs of the technician, and the voltage conversion performance of the voltage conversion circuit 10 is better.

[0100] Exemplarily, the first filter module 1011 includes a first capacitor, and the first end of the first capacitor is connected to the power supply VP and the boost module 1012, and the second end of the first capacitor is grounded; the second filter module 1014 includes multiple second capacitors in parallel, wherein the first ends of the multiple second capacitors are commonly connected to the rectifier module 1013 and the voltage output module 104, and the second ends of the multiple second capacitors are commonly grounded; therefore, the first filter module 1011 and the second filter module 1014 in this embodiment can realize the precise filtering and processing function for electric energy, so that the second filter module 1014 can output DC electric energy with higher precision, and the first DC voltage output by the power supply branch 101 can drive the voltage conversion circuit 10 to generate rated electric energy to ensure that the electrical equipment 20 is always in a safe operating state, the power supply branch 101 has strong circuit compatibility and a wider range of application, and the voltage conversion circuit 10 can realize precise voltage conversion function for electric energy, bringing a good user experience.

[0101] As an optional implementation, the voltage output module 104 includes a connector.

[0102] The first signal input terminal of the connector is connected to the power supply branch 101 , the second signal input terminal of the connector is connected to the voltage conversion module 102 , and the signal output terminal of the connector is connected to the power-consuming device 20 .

[0103] Among them, the connector has high power compatibility, and the voltage conversion circuit 10 can be compatible with various types of electrical equipment 20 through the connector. When the voltage conversion circuit 10 completes the conversion of the power supply energy, the second DC voltage can be output to the electrical equipment 20 through the connector. The second DC voltage can ensure the working safety of the electrical equipment 20 and improve the scope of use of the voltage conversion circuit.

[0104] Exemplarily, the connector in this embodiment is implemented by a pin terminal in the exemplary technology, for example, the first communication end of the pin terminal is the first signal input end of the connector, the second communication end of the pin terminal is the second signal input end of the connector, and the third communication end of the pin terminal is the signal output end of the connector; when the signal input end of the pin terminal (including: the first signal input end and the second signal input end) is respectively connected to the first DC voltage and the voltage drive signal B1, the pin terminal adjusts the amplitude of the first DC voltage according to the control information in the voltage drive signal B1, so that the signal output end of the pin terminal can output a second DC voltage of a specific amplitude according to the circuit function requirements of the technician; therefore, the connector in this embodiment has higher power compatibility, and the voltage output performance of the connector has higher controllability and stability. The voltage conversion circuit 10 can be applied to various types of power systems through the connector to provide rated power to the electrical equipment 20, and the voltage conversion circuit 10 has higher safety and compatibility of power transmission; the voltage output module 104 not only simplifies the circuit structure of the voltage conversion circuit 10, but also enables the voltage conversion circuit 10 to output the corresponding second DC voltage according to the actual needs of the technician, which brings a better user experience to the user.

[0105] As an optional implementation, the voltage conversion module 102 includes a voltage conversion chip.

[0106] Among them, the dimming signal input pin of the voltage conversion chip is connected to the dimming control signal A1, the modulation signal input pin of the voltage conversion chip is connected to the pulse width modulation signal A2, the gate pin of the voltage conversion chip is connected to the switch module 103, and the switch control signal B2 is output to the switch module 103 through the gate pin of the voltage conversion chip to drive the switch module 103 to realize the overvoltage protection function for the power supply branch 101; the drive signal output pin of the voltage conversion chip is connected to the voltage output module 104, and the drive signal output pin of the voltage conversion chip outputs the voltage drive signal B1 to the voltage output module 104, and the voltage drive signal B1 contains voltage drive information, and then the working state of the voltage output module 104 can be changed in time through the voltage drive signal B1, so that the second DC voltage output by the voltage output module 104 can fully meet the rated working requirements of the electrical equipment 20.

[0107] As an optional implementation, the model of the voltage conversion chip is: OB3365C DIP16, the dimming control signal A1 and the pulse width modulation signal A2 contain the operation information of the technician, and the signal conversion function of the voltage conversion chip can be timely controlled by the dimming control signal A1 and the pulse width modulation signal A2. The voltage conversion chip can output the voltage drive signal B1 and the switch control signal B2 according to the operation information of the technician to change the voltage conversion performance of the voltage conversion circuit 10; the voltage conversion chip in this embodiment has a complete signal conversion function, and the voltage conversion chip can enable the voltage conversion circuit 10 to output rated DC power, thereby improving the control stability and flexibility of the voltage conversion circuit 10. The circuit structure of the voltage conversion circuit 10 in this embodiment has extremely high compatibility, which is beneficial to reducing the cost of voltage conversion and simplifying the steps of voltage conversion.

[0108] As an optional implementation, Figure 6 The specific circuit structure of the voltage conversion module 102 provided in this embodiment is shown in FIG. Figure 6 The voltage conversion module 102 includes a voltage conversion chip U1, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10 and an eleventh capacitor C11.

[0109] The first end of the ninth resistor R9 and the first end of the third capacitor C3 are connected to the power input pin VIN of the voltage conversion chip U1, the second end of the ninth resistor R9 is connected to the first DC power supply VCC1, and the second end of the third capacitor C3 is grounded GND.

[0110] Optionally, the first DC power supply VCC1 is a +10V~+14V DC power supply. The first DC power supply VCC1 transmits DC power to the power input pin VIN of the voltage conversion chip U1, so that the voltage conversion chip U1 can be in a safe and stable working state. The voltage conversion chip U1 has high control stability to realize the power conversion function. The controllability of the voltage conversion circuit 10 can be guaranteed through the voltage conversion module 102.

[0111] The first end of the tenth resistor R10, the first end of the fourth capacitor C4 and the first end of the eleventh resistor R11 are connected to the dimming signal input pin ADIM of the voltage conversion chip U1, the second end of the tenth resistor R10 and the second end of the fourth capacitor C4 are connected to the ground GND, the second end of the eleventh resistor R11 is the dimming signal input end of the voltage conversion module 102, and the voltage conversion chip U1 can be divided and adjusted through the dimming control signal A1 so that the voltage conversion chip U1 can realize different signal control functions, the voltage conversion circuit 10 can realize adaptive voltage conversion function for the power supply energy, and the voltage amplitude output by the voltage conversion circuit 10 can be changed in real time through the dimming control signal A1.

[0112] The first end of the twelfth resistor R12 and the first end of the sixth capacitor C6 are connected to the compensation pin CMP of the voltage conversion chip U1, the second end of the twelfth resistor R12 is connected to the first end of the fifth capacitor C5, and the second end of the sixth capacitor C6 and the second end of the fifth capacitor C5 are connected to the ground GND; through the compensation pin CMP, the voltage conversion chip U1 can be continuously in a stable centralized control state, so that the voltage conversion chip U1 can stably realize the voltage conversion function, improve the stability of voltage conversion, and avoid circuit control errors.

[0113] Among them, the first end of the thirteenth resistor R13, the first end of the seventh capacitor C7 and the first end of the fourteenth resistor R14 are commonly connected to the modulation signal input pin PWM of the voltage conversion chip U1, and the second end of the thirteenth resistor R13 is the modulation signal input end of the voltage conversion module. The signal control function of the voltage conversion chip U1 can be changed through the pulse width modulation signal A2, so that the voltage conversion circuit 10 outputs a specific DC voltage to meet the actual needs of technicians; exemplarily, the working state of the voltage conversion chip U1 can be changed by changing the duty cycle of the pulse width modulation signal A2, so that the voltage conversion chip U1 outputs a switch control signal B2 containing different control information; when the duty cycle of the pulse width modulation signal A2 changes, the amplitude of the second DC voltage output by the voltage conversion circuit 10 will also change accordingly, and the power conversion state of the voltage conversion chip U1 can be flexibly controlled by the pulse width modulation signal A2. In this embodiment, the working state of the voltage conversion chip U1 and the duty cycle of the pulse width modulation signal A2 are consistent, and the voltage conversion process has a more simplified control performance.

[0114] The second end of the seventh capacitor C7, the second end of the fourteenth resistor R14, the first end of the eighth capacitor C8 and the first end of the fifteenth resistor R15 are connected to the ground GND, the first end of the sixteenth resistor R16 is the enable end of the voltage conversion module 102, the second end of the sixteenth resistor R16, the second end of the eighth capacitor C8 and the second end of the fifteenth resistor R15 are connected to the enable pin ENA of the voltage conversion chip U1, the enable end of the voltage conversion module 102 is connected to the enable signal, and the voltage conversion chip U1 can be awakened to the working state through the enable signal, so that the voltage conversion chip U1 can always be in a safe centralized control state; when the enable signal is in different level states, the voltage conversion chip U1 can be in a corresponding working or stop state, and the physical safety of the voltage conversion chip U1 can be guaranteed by the enable signal, so that the voltage conversion module 102 can realize the centralized control function according to the operating instructions of the technician, and the voltage conversion chip U1 has more flexible control performance.

[0115] The ground pin of the voltage conversion chip U1 is grounded GND.

[0116] The first end of the ninth capacitor C9 is connected to the ground GND, the second end of the ninth capacitor C9 and the first end of the seventeenth resistor R17 are connected to the power pin VCC of the voltage conversion chip U1, and the working stability of the electronic components inside the voltage conversion chip U1 can be guaranteed through the power pin VCC; the second end of the seventeenth resistor R17 and the first end of the nineteenth resistor R19 are connected to the power drive pin RI of the voltage conversion chip U1, and the voltage conversion chip U1 can be driven to enter a normal working state through the power drive pin RI; the second end of the nineteenth resistor R19 and the first end of the eleventh capacitor C11 are connected to the ground GND.

[0117] The second end of the eleventh capacitor C11 and the first end of the eighteenth resistor R18 are connected to the chip select signal output pin CS of the voltage conversion chip U1. The second end of the eighteenth resistor R18 is the chip select signal output end of the voltage conversion module 102. The chip select signal output end of the voltage conversion module 102 is connected to the power supply branch 101. The chip select signal is output to the power supply branch 101 through the chip select signal output end of the voltage conversion module 102. When the chip select signal is in different level states, the power supply branch 101 can be driven to perform voltage conversion through the chip select signal. For example, through the chip select signal The signal can change the power supply branch 101's amplification or reduction multiple of electric energy, so that the first DC voltage output by the power supply branch 101 has a different amplitude, and the voltage conversion circuit 10 can output rated DC power to the electrical equipment 20, and the electrical equipment 20 can be in a safe working state for a long time; therefore, the voltage conversion module 102 in this embodiment can control the voltage conversion state through the chip select signal, and the control response speed of the voltage conversion process is extremely high. The voltage conversion circuit 10 can output corresponding DC power according to the actual circuit requirements of the technician, and different types of electrical equipment 20 have higher physical safety performance.

[0118] The first end of the tenth capacitor C10, the first end of the twentieth resistor R20 and the first end of the twenty-first resistor R21 are connected to the overvoltage protection detection pin OVP of the voltage conversion chip U1, the second end of the tenth capacitor C10 and the second end of the twenty-first resistor R21 are connected to the ground GND, the second end of the twentieth resistor R20 is connected to the first end of the twenty-second resistor R22, and the second end of the twenty-second resistor R22 is connected to the power supply branch 101; when the overvoltage protection detection pin OVP of the voltage conversion chip U1 is connected to the operating voltage in the power supply branch 101, the voltage conversion chip U1 can detect whether the operating voltage in the power supply branch 101 is in an overvoltage state. state, the voltage conversion chip U1 can accurately monitor whether there is any abnormality in the voltage conversion process of the power supply branch 101 in real time; if the voltage conversion chip U1 detects that the power supply branch 101 is in an overvoltage state, the voltage conversion chip U1 can immediately respond to the overvoltage state of the power supply branch 101 to ensure the voltage conversion safety performance of the power supply branch 101; therefore, the voltage conversion chip U1 in this embodiment can have a high detection sensitivity and detection accuracy for the overvoltage state of the power supply branch 101, and then the voltage conversion chip U1 can quickly respond to the overvoltage state of the power supply branch 101, thereby improving the control efficiency and control accuracy of the voltage conversion module 102 for the overvoltage state during the voltage conversion process. The voltage conversion stability of the voltage conversion circuit 10 is higher.

[0119] The first end of the twenty-third resistor R23 and the first end of the twenty-fourth resistor R24 ​​are connected to the maximum current setting pin ISET of the voltage conversion chip U1, and the second end of the twenty-third resistor R23 and the second end of the twenty-fourth resistor R24 ​​are connected to the ground GND; the maximum current setting pin ISET can ensure that the operating current inside the voltage conversion chip U1 is within a safe range, the voltage conversion chip U1 can realize normal centralized control functions according to the operating instructions of the technicians, and the internal electronic components of the voltage conversion chip U1 have higher safety performance; the voltage conversion chip U1 can maintain a safe working state for a long time, and the voltage conversion module 102 has higher control robustness and control stability and stronger compatibility.

[0120] The gate pin GATE of the voltage conversion chip U1 is connected to the switch module 103 , and the voltage conversion chip U1 outputs the switch control signal B2 to the switch module 103 through the gate pin GATE to achieve an overvoltage protection function.

[0121] The first drive signal output pin LED1 of the voltage conversion chip U1 and the second drive signal output pin LED2 of the voltage conversion chip U1 are connected to the first end of the twenty-sixth resistor R26, the third drive signal output pin LED3 of the voltage conversion chip U1 and the fourth drive signal output pin LED4 of the voltage conversion chip U1 are connected to the first end of the twenty-fifth resistor R25, the second end of the twenty-fifth resistor R25 and the second end of the twenty-sixth resistor R26 are connected to the voltage output module 104, and the drive signal output pins of the voltage conversion chip U1 (including: the first drive signal output pin LED1, the second drive signal output pin LED2) are connected to the first end of the twenty-sixth resistor R26. The first driving signal output pin LED2, the third driving signal output pin LED3 and the fourth driving signal output pin LED4) output the voltage driving signal B1 to the voltage output module 104, and the voltage amplitude output by the voltage output module 104 can be changed through the voltage driving signal B1, so that the second DC voltage output by the voltage output module 104 can meet the rated power requirement of the electrical equipment 20; the voltage conversion function of the voltage conversion circuit 10 has higher controllability, and the second DC voltage output after the voltage conversion can fully meet the circuit function requirements of the user, and the voltage conversion function of the voltage conversion circuit 10 has higher compatibility and practical value.

[0122] exist Figure 6In the specific circuit structure of the voltage conversion module 102 shown in FIG, the voltage conversion module 102 can realize the circuit centralized control function through the voltage conversion chip U1, and the voltage conversion chip U1 can parse and identify the circuit control information contained in the dimming control signal A1 and the pulse width modulation signal A2. The voltage conversion chip U1 can make the switch module 103 perform overvoltage protection on the power supply branch 101 according to the operation instructions of the technician, and realize a higher control response accuracy for the switch module 103 according to the switch control signal B2. The voltage conversion circuit 10 performs safe and stable voltage conversion on the power supply energy, and the accuracy and stability of the voltage conversion are higher; the voltage conversion chip U1 can generate a voltage drive signal B1 in real time, and the amplitude of the second DC voltage can be changed in time through the voltage drive signal B1; when the voltage conversion circuit 10 is applied to different power systems, the voltage conversion circuit 10 can output a rated second DC voltage according to the voltage drive signal B1, and drive the electrical equipment 20 to be in a rated working state through the second DC voltage. state, ensuring the safe operation of the electrical equipment 20, the voltage conversion circuit 10 can be widely used in various types of electrical equipment; therefore, the voltage conversion module 102 in this embodiment has a more compatible and simplified circuit structure, the voltage conversion chip U1 can perform overvoltage protection and regulate the voltage conversion process according to the user's operating instructions, the power supply branch 101 has a safer voltage conversion performance, and the second DC voltage output by the voltage output module 104 can drive the electrical equipment 20 to be in a stable operating state, and the compatibility is strong; the voltage conversion module 102 in this embodiment has a fully functional control performance, and the user experience is better. When the voltage conversion circuit 10 is applied to different industrial technical fields, the voltage conversion circuit 10 can adaptively change its own voltage conversion function according to the type of electrical equipment 20, and the safety and reliability of voltage conversion are also greatly improved, which is conducive to the voltage conversion circuit 10 in the power system to maintain a high degree of operation stability and compatibility.

[0123] As an optional implementation, the electrical device 20 is a light bar or a motor.

[0124] It should be noted that the type of the above-mentioned electrical equipment 20 is only an embodiment and does not constitute a technical limitation. Those skilled in the art can also apply the voltage conversion circuit 10 to other industrial fields, such as power supply design, power grid transmission, etc., without limitation.

[0125] With reference to the above-mentioned embodiments, the present embodiment can convert the supply power into DC power of different amplitudes through the voltage conversion circuit 10 to drive the electrical equipment 20 to be in a stable operating state; exemplarily, the rated power can be output to the light bar through the voltage conversion circuit 10, and the light bar can be in a normal light-emitting state, thereby achieving a good lighting effect; and the voltage conversion circuit 10 has its own overvoltage protection function, the voltage conversion process can be in a safe and stable state, and can continuously output DC power, the voltage conversion process has higher reliability and flexibility, the voltage conversion circuit 10 continuously provides DC power to the electrical equipment 20, and the electrical equipment 20 can be in a rated operating state for a long time; the voltage conversion circuit 10 has low power consumption and can be safely applied to various different industrial technical fields.

[0126] Figure 7 FIG. 4 shows a schematic diagram of the structure of the display device 70 provided in this embodiment. Figure 7 As shown, the display device 70 includes: the voltage conversion circuit 10 and the backlight source 701 as described above; the backlight source 701 is connected to the voltage conversion circuit 10, and the voltage conversion circuit 10 outputs DC power to the backlight source 701 so that the backlight source 701 is in a rated working state.

[0127] In one embodiment, the display device 70 can be any type of display device provided with the above-mentioned voltage conversion circuit 10, such as an LCD (Liquid Crystal Display), an OLED (Organic Electroluminesence Display), a QLED (Quantum Dot Light Emitting Diodes) display, or a curved display device.

[0128] In the display device 70, the backlight source 701 can achieve a luminous effect. When the backlight source 701 is connected to DC power to maintain a normal working state, the backlight source 701 can emit light sources of different colors and brightness according to the actual needs of the technicians, and the display device 70 presents a corresponding image / video, giving the user a visual sense of dynamics; combined with the above Figures 1 to 6In the embodiment, when the voltage conversion circuit 10 is applied to the display device 70, when the voltage conversion circuit 10 is connected to the external power supply energy, the power supply energy can be adaptively converted by the voltage conversion circuit 10 to drive the backlight source 701 to be in the rated working state, and the display device 70 can be stably in the video display state to ensure the working safety performance of the display device 70; at the same time, the voltage conversion circuit 10 has an overvoltage protection function, so that the voltage conversion circuit 10 can be in a safe operating state, and the internal structure of the display device 70 has a higher physical safety level; therefore, the power inside the display device 70 in this embodiment can maintain the rated amplitude, the circuit safety is high, the display device 70 can be applied to various different industrial technical fields, the service life is longer, the failure rate is lower, the reliability and stability are higher, and the display device 70 can display the video in real time according to the actual needs of the technicians, the user's visual experience is better, and the practical value is higher; it effectively solves the problem that the power connected to the display device in the exemplary technology is unstable, the power failure rate of the display device is high, it is difficult to maintain a stable video display state, and the internal circuit structure of the display device is easily damaged due to the overvoltage state, which reduces the video display safety of the display device, the service life is short, and the user's experience is not good.

[0129] To sum up, the voltage conversion circuit 10 in the present application can stably and quickly convert the power supply energy into DC power of corresponding amplitude according to the actual needs of the technicians, so as to ensure the working stability and safety of the electrical equipment, and then achieve better voltage conversion performance through the voltage conversion circuit 10; and the voltage conversion circuit 10 can perform overvoltage protection, which ensures the physical safety and reliability of the voltage conversion circuit 10 and prevents the voltage conversion circuit 10 from being damaged due to overvoltage / overcurrent; therefore, the voltage conversion circuit 10 has good controllability, and the voltage conversion circuit 10 flexibly outputs DC power under the control of the technicians, the voltage conversion performance is more stable, the compatibility is stronger, the operating current in the voltage conversion circuit 10 is within a safe range, the physical safety performance is guaranteed, and the user experience is better, which plays an important positive role in the promotion and application of voltage conversion technology in this field and will generate good industrial production value.

[0130] Various embodiments are described herein for various devices, circuits, apparatuses, systems and / or methods. Many specific details are set forth to provide a thorough understanding of the overall structure, function, manufacture and use of the embodiments as described in the specification and shown in the drawings. However, those skilled in the art will appreciate that the embodiments may be implemented without such specific details. In other examples, well-known operations, parts and elements are described in detail so as not to make the embodiments in the specification difficult to understand. Those skilled in the art will appreciate that the embodiments herein and shown are non-limiting examples, and therefore it will be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments.

[0131] References to "various embodiments", "in an embodiment", "one embodiment", or "an embodiment" throughout the specification, etc., mean that a particular feature, structure, or characteristic described with respect to an embodiment is included in at least one embodiment. Therefore, the appearance of the phrases "in various embodiments", "in some embodiments", "in an embodiment", or "in an embodiment", etc., in appropriate places throughout the specification, do not necessarily refer to the same embodiment. In addition, particular features, structures, or characteristics may be combined in any appropriate manner in one or more embodiments. Therefore, a particular feature, structure, or characteristic shown or described with respect to one embodiment may be combined in whole or in part with features, structures, or characteristics of one or more other embodiments without assuming that such a combination is not an illogical or non-functional limitation. Any directional references (e.g., plus, minus, upper, lower, up, down, left, right, leftward, rightward, top, bottom, above, below, vertical, horizontal, clockwise, and counterclockwise) are used for identification purposes to help the reader understand the present disclosure, and do not create limitations, particularly with respect to the location, orientation, or use of the embodiments.

[0132] Although certain embodiments are described above with a certain degree of detail, those skilled in the art may make many changes to the disclosed embodiments without departing from the scope of the present disclosure. Connection references (e.g., attachment, coupling, connection, etc.) should be interpreted broadly and may include intermediate members between the connection of elements and relative motion between elements. Therefore, connection references do not necessarily imply that two elements are directly connected / coupled and are in a fixed relationship with each other. The use of "for example" throughout the specification should be interpreted broadly and used to provide non-limiting examples of embodiments of the present disclosure, and the present disclosure is not limited to such examples. It is intended that all matters included in the above description or shown in the accompanying drawings should be interpreted as merely illustrative rather than restrictive. Changes in details or structure may be made without departing from the present disclosure.

[0133] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A voltage conversion circuit, characterized in that: include: A power supply branch, wherein a first terminal of the power supply branch is connected to a power supply, and the power supply branch converts power supply energy output by the power supply into a first DC voltage; A voltage conversion module, wherein a dimming signal input terminal of the voltage conversion module is connected to a dimming control signal, a modulation signal input terminal of the voltage conversion module is connected to a pulse width modulation signal, and the voltage conversion module generates a voltage driving signal according to the dimming control signal, and generates a switch control signal according to the pulse width modulation signal; A switch module, wherein the switch module is connected between the voltage conversion module and the power supply branch, and the switch module performs overvoltage protection on the power supply branch according to the switch control signal; as well as a voltage output module, the voltage output module being connected to the second end of the power supply branch, the voltage conversion module and the power-consuming device, the voltage output module outputting a second DC voltage according to the first DC voltage and the voltage driving signal, so as to put the power-consuming device in a rated working state; The power supply branch comprises: A first filtering module, the first filtering module is connected to the power supply, and the first filtering module performs filtering processing on the power supply; A boost module, the boost module is connected to the first filter module, the voltage conversion module and the switch module, and the boost module boosts the filtered power supply energy according to the switch control signal to obtain the first DC voltage; a rectifier module, the rectifier module is connected to the boost module, and the rectifier module rectifies the first DC voltage; and a second filtering module, the second filtering module being connected to the rectifying module and the voltage output module, and the second filtering module filtering the rectified first DC voltage and then outputting the filtered voltage; The boost module includes a first inductor, a first switch tube, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor; The first end of the first inductor is connected to the first filtering module, the second end of the first inductor and the first conducting end of the first switch tube are commonly connected to the rectifier module, the first end of the first resistor, the first end of the second resistor, the first end of the third resistor, the first end of the fourth resistor and the first end of the fifth resistor are commonly connected to the second conducting end of the first switch tube, and the second end of the second resistor, the second end of the third resistor, the second end of the fourth resistor and the second end of the fifth resistor are commonly connected to the ground; The second end of the first resistor and the control end of the first switch tube are connected to the voltage conversion module and the switch module, and the second end of the first resistor and the control end of the first switch tube are connected to the switch control signal; The switch module includes a second switch tube, a sixth resistor, a seventh resistor and an eighth resistor; The first conducting end of the second switch tube and the first end of the sixth resistor are connected together to form the first conducting end of the switch module; The control end of the second switch tube is connected to the first end of the seventh resistor; The second end of the sixth resistor and the second end of the seventh resistor are connected together to form a control end of the switch module; The second conducting end of the second switch tube is connected to the first end of the eighth resistor; The second end of the eighth resistor is the second conduction end of the switch module; Wherein, when the first switch tube is turned off, the second switch tube is turned on; The voltage output module includes a connector; The first signal input terminal of the connector is connected to the power supply branch, the second signal input terminal of the connector is connected to the voltage conversion module, and the signal output terminal of the connector is connected to the power-consuming device.

2. The voltage conversion circuit according to claim 1, characterized in that: The first conducting end of the switch module is connected to the control end of the first switch tube, the second conducting end of the switch module is grounded, and the control end of the switch module is connected to the voltage conversion module; The switch module performs overvoltage protection on the first switch tube when the first switch tube is turned off according to the switch control signal.

3. The voltage conversion circuit according to claim 1, characterized in that: The first filtering module includes at least one first capacitor; The rectifier module comprises a first diode, an anode of the first diode is connected to the boost module, and a cathode of the first diode is connected to the second filter module; The second filtering module includes at least one second capacitor.

4. The voltage conversion circuit according to claim 1, characterized in that: The voltage conversion module includes a voltage conversion chip; The dimming signal input pin of the voltage conversion chip is connected to the dimming control signal, the modulation signal input pin of the voltage conversion chip is connected to the pulse width modulation signal, the gate pin of the voltage conversion chip is connected to the switch module, and the drive signal output pin of the voltage conversion chip is connected to the voltage output module.

5. The voltage conversion circuit according to claim 1, characterized in that: The electrical equipment is a light bar or a motor.

6. A display device, characterized in that: include: The voltage conversion circuit according to any one of claims 1 to 5; as well as A backlight source is connected to the voltage conversion circuit, and the voltage conversion circuit outputs direct current power to the backlight source so that the backlight source is in a rated working state.

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