CN209462275U

CN209462275U - Voltage conversion circuit and display device

Info

Publication number: CN209462275U
Application number: CN201920239936.8U
Authority: CN
Inventors: 王智勇; 王平; 王泽贵
Original assignee: Hefei Huike Jinyang Technology Co Ltd
Current assignee: Hefei Huike Jinyang Technology Co Ltd
Priority date: 2019-02-21
Filing date: 2019-02-21
Publication date: 2019-10-01
Anticipated expiration: 2029-02-21

Abstract

A kind of voltage conversion circuit and display device, the voltage conversion circuit include: voltage output module, power supply branch, voltage transformation module and switch module；The power supply electric energy that power supply exports is converted to the first DC voltage by the first termination power supply of power supply branch, branch of powering；The dim signal input terminal of voltage transformation module accesses dimming control signal, the modulated signal input terminal of voltage transformation module accesses pulse-width signal, and voltage transformation module generates voltage drive signals according to dimming control signal and generates switch control signal according to pulse-width signal；Switch module is connected between voltage transformation module and power supply branch, and switch module carries out overvoltage protection to power supply branch according to switch control signal；Voltage output module connects second end, voltage transformation module and the electrical equipment of power supply branch, and voltage output module exports the second DC voltage according to the first DC voltage and voltage drive signals, so that electrical equipment is in rated operation.

Description

Voltage conversion circuit and display device

Technical field

The application belongs to electronic circuit technology field more particularly to a kind of voltage conversion circuit and display device.

Background technique

Voltage switch technology obtains universal application in the electronic device, since varied property is presented in the demand of people, The rated operation of different type electronic equipment is not also identical；Therefore technical staff needs to use voltage switch technology will be same The electric energy of type is converted to the operating voltage for meeting electronic equipments safety operation demand, to ensure that electronic equipment can be in always Stable state；It can ensure that electric system can be compatible with the power supply need of various types of electronic equipments by voltage conversion circuit It asks, the electric energy after different electronic component access conversions, to meet the different circuit function demands of user；To which voltage is converted The use that the development of technology obtains electron equipment brings great convenience, and saves the electric energy service cost of electronic equipment, Facilitate the production and living of people.

Voltage conversion circuit in traditional technology is needed by electric field effect control size of current, for example, technical staff Voltage conversion process is controlled by metal-oxide-semiconductor, when metal-oxide-semiconductor grid access electric current when, by the electric current make metal-oxide-semiconductor be connected or Shutdown, so that voltage conversion circuit can be converted according to the actual demand of user exports corresponding operating voltage；Therefore electricity Voltage conversion circuit needs the on-off of itself to realize the demand of different amplitude operating voltages, in the process, in traditional technology At least there is following both sides shortcoming in voltage conversion circuit:

1, voltage conversion circuit carries out individually designed, manufacture according to specific electronic equipment, once voltage conversion electricity Road is designed to complete, the voltage conversion circuit can only export amplitude and specific operating voltage or the voltage conversion circuit The amplitude range of output services voltage is relatively narrow, and then the flexibility of the voltage conversion performance of traditional voltage conversion circuit is lower, Operability is not high, and performance is unstable.

2, traditional voltage conversion circuit only has voltage conversion function, due to being easy to appear event in voltage conversion process Barrier causes the working voltage in voltage conversion circuit to be easy in over-voltage/overcurrent operating status, if electricity can not be converted to voltage Overvoltage condition is inhibited in road, and voltage conversion circuit will generate greatly power loss, can even be burnt completely when serious Voltage conversion circuit；Therefore the safety of voltage conversion circuit is lower in traditional technology.

In conclusion the flexible performance of the voltage conversion circuit in traditional technology is lower, the stability of voltage conversion is poor, It cannot achieve the over-voltage protecting function of own electronic component, security performance is not high, and usage experience is bad.

Utility model content

In view of this, the embodiment of the present application provides a kind of voltage conversion circuit and display device, it is intended to solve exemplary The stability of the conversion of voltage existing for technology is poor, and flexibility is not high, cannot achieve the overvoltage protection of own electronic component, electricity The problem of security performance on road is lower, reduces usage experience.

The first aspect of the embodiment of the present application provides a kind of voltage conversion circuit, comprising:

Power supply branch, the first termination power supply of the power supply branch, the power supply branch are defeated by the power supply Power supply electric energy out is converted to the first DC voltage；

The dim signal input terminal of voltage transformation module, the voltage transformation module accesses dimming control signal, the electricity The modulated signal input terminal of conversion module is pressed to access pulse-width signal, the voltage transformation module is believed according to the brightness adjustment control Number generate voltage drive signals and according to the pulse-width signal generate switch control signal；

Switch module, the switch module is connected between the voltage transformation module and the power supply branch, described to open It closes module and overvoltage protection is carried out to the power supply branch according to the switch control signal；And

Voltage output module, the voltage output module connect the second end of the power supply branch, the voltage transformation module And electrical equipment, the voltage output module are straight according to first DC voltage and voltage drive signals output second Galvanic electricity pressure, so that the electrical equipment is in rated operation.

In one embodiment, the power supply branch includes:

First filter module, first filter module connect the power supply, and first filter module is to the confession Electric energy is filtered；

Boost module, the boost module connect first filter module, the voltage transformation module and the switch Module, the boost module are boosted to obtain institute according to the switch control signal to the power supply electric energy after the filtering processing State the first DC voltage；

Rectification module, the rectification module connect the boost module, the rectification module to first DC voltage into Row rectification；And

Second filter module, second filter module connect the rectification module and the voltage output module, and described Two filter modules export after being filtered to the first DC voltage after rectification.

In one embodiment, the boost module include the first inductance, first switch tube, first resistor, second resistance, 3rd resistor, the 4th resistance and the 5th resistance；

First termination first filter module of first inductance, the second end of first inductance and described first First conduction terminal of switching tube is connected to the rectification module altogether, and the first of the first end of the first resistor, the second resistance End, the first end of the 3rd resistor, the first end of the 4th resistance and the first end of the 5th resistance are connected to institute altogether State the second conduction terminal of first switch tube, the second end of the second resistance, the second end of the 3rd resistor, the 4th electricity The second end of resistance and the second end of the 5th resistance are connected to ground altogether；

The control terminal of the second end of the first resistor and the first switch tube be connected to altogether the voltage transformation module and The control terminal of the switch module, the second end of the first resistor and the first switch tube accesses the switch control letter altogether Number.

In one embodiment, the first conducting of the switch module terminates the control terminal of the first switch tube, described Second conduction terminal of switch module is grounded, and the control of the switch module terminates the voltage transformation module；

The switch module is according to the switch control signal when the first switch tube is turned off to the first switch Pipe carries out overvoltage protection.

In one embodiment, the switch module includes second switch, the 6th resistance, the 7th resistance and the 8th electricity Resistance；

First conduction terminal of the second switch and the first end of the 6th resistance connect to form the switch module altogether The first conduction terminal；

The control of the second switch terminates the first end of the 7th resistance；

The second end of 6th resistance and the second end of the 7th resistance connect the control to form the switch module altogether End；

Second conducting of the second switch terminates the first end of the 8th resistance；

The second end of 8th resistance is the second conduction terminal of the switch module；

Wherein, when the first switch tube turns off, the second switch closure.

In one embodiment, first filter module includes at least one first capacitor；

The rectification module includes first diode, and the anode of the first diode connects the boost module, and described The cathode of one diode connects second filter module；

Second filter module includes at least one second capacitor.

In one embodiment, the voltage output module includes connector；

First signal input part of the connector connects the power supply branch, and the second signal of the connector inputs termination The voltage transformation module, the signal output end of the connector connect the electrical equipment.

In one embodiment, the voltage transformation module includes voltage conversion chip；

The dim signal input pin of the voltage conversion chip accesses the dimming control signal, and the voltage converts core The modulated signal input pin of piece accesses the pulse-width signal, and the gate pin of the voltage conversion chip connects the switch The driving signal output pin of module, the voltage conversion chip connects the voltage output module.

In one embodiment, the electrical equipment is lamp bar or motor.

The second aspect of the embodiment of the present application provides a kind of display device, comprising:

Voltage conversion circuit as described above；And

Backlight, the backlight connect the voltage conversion circuit, the voltage conversion circuit by direct current energy export to Backlight, so that the backlight is in rated operation.

Above-mentioned voltage conversion circuit can be realized the conversion of power supply electric energy by branch of powering, straight to export stable first Galvanic electricity pressure；Wherein voltage transformation module can change voltage conversion circuit according to dimming control signal and pulse-width control signal Working condition, and dimming control signal and pulse-width control signal include the control information of technical staff, so that the voltage turns The second DC voltage of amplitude and specific can be exported according to the actual demand of technical staff by changing circuit, and flexibility is higher, and then should There is voltage conversion circuit good controllability and electric energy to convert stability, and electrical equipment can be in nominal operation shape always State；Simultaneous Switching module carries out overvoltage protection to power supply branch according to switch control signal, so that in the voltage conversion circuit Each electronic component be in safe and stable working condition always, not only reduced the power loss of voltage conversion circuit, but also The security performance and general applicability energy for having ensured voltage conversion improve the safety of the voltage conversion circuit and reliable Property, good usage experience is brought to user.

Detailed description of the invention

It in order to more clearly explain the technical solutions in the embodiments of the present application, below will be to embodiment or description of the prior art Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only some of the application Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these Attached drawing obtains other attached drawings.

Fig. 1 is the structural schematic diagram for the voltage conversion circuit that one embodiment of the application provides；

Fig. 2 is the structural schematic diagram for the power supply branch that one embodiment of the application provides；

Fig. 3 is the circuit structure diagram for the boost module that one embodiment of the application provides；

Fig. 4 is the structural schematic diagram for the switch module that one embodiment of the application provides；

Fig. 5 is the circuit structure diagram for the switch module that one embodiment of the application provides；

Fig. 6 is the circuit structure diagram for the voltage transformation module that one embodiment of the application provides；

Fig. 7 is the structural schematic diagram for the display device that one embodiment of the application provides.

Specific embodiment

It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and It is not used in restriction the application.

Referring to Fig. 1, voltage conversion circuit 10 provided by the embodiments of the present application can be realized the conversion function of voltage magnitude, So that the voltage after conversion can be suitable for different types of electrical equipment 20, the job security of electrical equipment 20 and steady is ensured It is qualitative；For ease of description, only the parts related to this embodiment are shown, and details are as follows:

Wherein, voltage conversion circuit 10 includes: power supply branch 101, voltage transformation module 102, switch module 103 and electricity Press output module 104.

First termination power supply VP of the power supply branch 101, the power supply branch 101 are defeated by the power supply VP Power supply electric energy out is converted to the first DC voltage.

Wherein, the power supply branch 101 in the present embodiment can be realized the function of electric energy transmission and electric energy conversion, by this Voltage conversion circuit 10 can convert the amplitude for electric energy of powering, and illustratively, be able to carry out by the power supply branch 101 Boosting or decompression, and then the first DC voltage that branch 101 exports of powering is capable of providing stable electric energy, so that electronics member device Part can reduce the cost of voltage conversion under the driving of the first DC voltage in stable, safe working condition；Therefore The present embodiment has access to power supply electric energy by branch 101 of powering, being capable of driving voltage conversion circuit 10 by the power supply electric energy In safe and stable working condition, the duration and reliability of voltage conversion have been ensured.

As an alternative embodiment, the power supply VP is+30V~+50V DC power supply, pass through power supply electricity Source VP DC power output, has ensured the electric energy supply security of voltage conversion circuit 10, and voltage conversion circuit 10 can will be for Electric energy is converted to the direct current energy of different amplitudes, reduces the cost of electric energy conversion, while the voltage conversion in the present embodiment Circuit 10 can be suitable for different types of electric system, and to realize corresponding voltage conversion function, compatibility is stronger.

The dim signal input terminal of the voltage transformation module 102 accesses dimming control signal A1, the voltage modulus of conversion The modulated signal input terminal of block 102 accesses pulse-width signal A2, and the voltage transformation module 102 is believed according to the brightness adjustment control Number A1 generates voltage drive signals and generates switch control signal B2 according to the pulse-width signal A2.

As an alternative embodiment, dimming control signal A1 is generated by adjusting control circuit in example technique, Wherein the adjusting control circuit in example technique includes the electronic components such as photo-coupler, can be by non-electrical by photo-coupler Amount signal is converted into electric quantity signal, and then realizes and the voltage conversion performance of voltage conversion circuit 10 is adjusted, so that electric Voltage conversion circuit 10 has good controllability energy；Pulse-width signal A2 is by pulse width modulated in example technique (Pulse Width Modulation, PWM) circuit generates, and wherein the pulse width modulation circuit in example technique includes: The electronic components such as metal-oxide-semiconductor, electronics and diode are believed by the pulsewidth modulation that pulse width modulation circuit generates different amplitudes Number A2 perhaps different duty pulse-width signal A2 when pulse-width signal A2 operating parameter (amplitude or duty ratio Deng) change when, voltage transformation module 102 can generate respective switch control signal B2, the electricity of voltage conversion circuit 10 Press conversion performance that there is good controllability；The present embodiment can be real by dimming control signal A1 and pulse-width signal A2 When change voltage conversion circuit 10 working condition, sensitivity is high, so that voltage conversion circuit 10 can be according to technical staff Demand generate the voltage of respective magnitudes, the control flexibility of voltage conversion circuit 10 is stronger.

There is voltage transformation module 102 in the present embodiment signal to focus on and analyze performance, pass through voltage modulus of conversion Block 102 can parse the control information of both dimming control signal A1 and pulse-width signal A2, be driven with output voltage Signal B1 and switch control signal B2；Voltage transformation module 102 has good function switching signal, passes through voltage drive signals B1 and switch control signal B2 can change the voltage conversion performance of voltage conversion circuit 10 in real time, so that voltage conversion circuit 10 The voltage rating that respective magnitudes can be exported according to the actual demand of technical staff, ensures the job stability and peace of electrical equipment 20 Quan Xing, voltage transformation module 102 have good operation compatibility and controllability, the usage experience of user higher.

The switch module 103 is connected between the voltage transformation module 102 and the power supply branch 101, described to open It closes module 103 and overvoltage protection is carried out to the power supply branch 101 according to the switch control signal B2.

Power supply branch 101 can be realized voltage conversion, to change the amplitude of electric energy；And it in actual application, supplies Electric branch 101 needs continually to be connected or turn off, and then will appear biggish transient electric-energy in branch 101 of powering, for example supply Electric branch 101 will appear biggish transient voltage or transient current, and power supply branch 101 is easy to be in overvoltage condition；Switch Module 103 can play the role of overvoltage protection in voltage conversion circuit 10, when power supply branch 101 is in over-voltage operating status When, can be released the charge powered in branch 101 in time by switch module 103, so that the voltage of power supply branch 101 is located always In the state of safety, branch 101 of powering can be realized safe and stable electric energy conversion function, ensure the object of electronic component Manage security performance；When voltage transformation module 102 by switch control signal B2 export to power supply branch 101 when, pass through switch control Signal B2 can driving switch module 103 realize corresponding over-voltage protecting function, adaptively to ensure voltage conversion circuit 10 Voltage Transition Security；Illustratively, when switch control signal B2 is the first level state, switch module 103 is right immediately Power supply branch 101 takes overvoltage protection；When switch control signal B2 is second electrical level state, switch module 103 can not be to power supply Branch 101 takes overvoltage protection；Therefore the control sensitivity with higher of power supply branch 101 and control response in the present embodiment Speed can prevent from being in over-voltage operating status, and then voltage conversion circuit 10 to power supply branch 101 by switch module 103 It is capable of the voltage of output safety, improves the voltage switching reliability and compatibility of power supply branch 101.

The voltage output module 104 connect the power supply second end of branch 101, the voltage transformation module 102 and Electrical equipment 20, the voltage output module 104 is according to first DC voltage and voltage drive signals B1 output the Two DC voltages, so that the electrical equipment 20 is in rated operation.

Power branch 101 second end by the first direct voltage output to voltage output module 104, voltage transformation module 102 export voltage drive signals B1 to voltage output module 104, wherein voltage output module 104 is compatible different types of Electrical equipment 20, to realize that the electric energy between voltage output module 104 and electrical equipment 20 transmits；Voltage drive signals B1 includes Voltage activation bit, voltage output module 104 can answer width in conjunction with the first DC voltage and voltage drive signals B1 with output phase Second DC voltage of value, the amplitude of second DC voltage can comply fully with the rated power demand of electrical equipment 20, Ensure the electric power safety performance of electrical equipment 20；Voltage conversion circuit 10 in the present embodiment can be believed according to the operation of technical staff Breath exports corresponding second DC voltage, so that the amplitude of the second DC voltage has wider adjusting range and higher adjustment Stability can drive electrical equipment 20 to be in specified working condition by the second DC voltage；And then voltage output module 104 can be compatible with suitable for different types of electrical equipment 20, the amplitude of the second DC voltage adjustability energy with higher, Voltage after the conversion of 10 voltage of voltage conversion circuit can be suitable for various types of electrical equipments 20, voltage conversion circuit 10 use scope is wider.

In the structure of voltage conversion circuit 10 shown in fig. 1, voltage conversion circuit 10 has more simplified structure, leads to Overvoltage output module 104 and electrical equipment 20 can be realized the alternating transmission of electric energy, ensure being applicable in for voltage conversion circuit 10 Generality；Control information can be transmitted to voltage conversion by dimming control signal A1 and pulse-width control signal A2 by technical staff Circuit 10 passes through voltage output module so that voltage conversion circuit 10 carries out voltage conversion according to the operation information of technical staff Second DC voltage of 104 outputs can make different types of electrical equipment 20 be in specified working condition, voltage conversion Compatibility is stronger, and the controllability of the voltage conversion performance of the voltage conversion circuit 10 in the present embodiment and flexibility pole By force, the voltage after the output of voltage conversion circuit 10 conversion, to meet the actual circuit functional requirement of technical staff, electrical equipment 20 It can be in safe and stable working condition always；It is carried out in voltage conversion process in power supply branch 101 simultaneously, switch module 103 can in real time to power supply branch 101 carry out overvoltage protection, power branch 101 in electronic component be in always safety, can The operating status leaned on, voltage conversion circuit 10 can routinely carry out voltage conversion, in voltage conversion process security performance and Stability is stronger, by voltage conversion circuit 10 by the power output after conversion to electrical equipment 20, so that electrical equipment 20 It can be chronically at specified operating status, voltage conversion circuit 10 can be suitable for each different industrial technical field, lead to Overvoltage conversion circuit 10 can realize different types of voltage conversion function, the usage experience of user more preferably, electrical equipment 20 Electric power safety performance is higher；The voltage conversion stability for efficiently solving voltage conversion circuit in example technique is lower, turns The adjustable extent for changing rear voltage magnitude is relatively narrow, and the usage experience of user is bad, voltage in compatible lower and example technique Conversion circuit cannot achieve the overvoltage protection of itself, the lower problem of safety and stability.

As an alternative embodiment, Fig. 2 shows the structural representation of power supply branch 101 provided in this embodiment, Referring to Fig. 2, the power supply branch 101 include: the first filter module 1011, boost module 1012, rectification module 1013 and Second filter module 1014.

First filter module 1011 meets the power supply VP, and first filter module 1011 is to the power supply electricity It can be carried out filtering processing.

The power supply electric energy exported by power supply VP can make power supply branch 101 realize the function that corresponding voltage is converted Can, and since the power supply electric energy of extraneous power supply VP output is there are more noise, this noise will be to power supply branch The electric energy conversion process on road 101 causes biggish interference, influences the precision of electric energy conversion；Therefore pass through the first filter module 1011 The noise in power supply electric energy, and then the power supply electric energy electric energy precision with higher after filtering processing can be filtered out in time；Such as By the first filter module 1011 can filter out in time power supply electric energy in AC compounent, power supply branch 101 can be to filtering at Power supply electric energy after reason is accurately converted, and the voltage converting accuracy of power supply branch 101 is improved；And then in the present embodiment Electric energy of powering can be converted to the DC voltage of different amplitudes, the DC voltage after overvoltage is converted by voltage conversion circuit 10 With higher precision and stability, branch 101 of powering has more preferably voltage conversion performance, is conducive to improve voltage conversion electricity The error of low voltage transition, drops in the reliability and the scope of application on road 10.

The boost module 1012 connects first filter module 1011, the voltage transformation module 102 and described opens Close module 103, the boost module 1012 according to the switch control signal B2 to the power supply electric energy after the filtering processing into Row boosting obtains first DC voltage.

In the present embodiment, boost module 1012 has the function of boosting, when voltage transformation module 102 believes switch control Number B2 is exported to boost module 1012, and the working condition of boost module 1012 can be controlled by switch control signal B2；Example Property, boost module 1012 realizes corresponding boost function according to the level state of switch control signal B2, ensures boost module 1012 controllability and flexibility；When the voltage input end of boost module 1012 accesses the power supply electric energy after being filtered, Boost conversion is carried out by the power supply electric energy after 1012 pairs of boost module filtering processings, to change the amplitude of power supply electric energy, boosting Module 1012 can carry out corresponding electric energy conversion according to the actual demand of technical staff, and the first DC voltage has specific width Value, and then the boost module 1012 in the present embodiment can realize boosting according to the circuit function demand of technical staff, accelerate The boost conversion rate of power supply branch 101, the working condition of boost module 1012 has good controllable in the present embodiment Property, ensure the boost conversion performance of voltage conversion circuit 10.

During boost module 1012 carries out boost conversion, switch module 103 can carry out boost module 1012 Pressure protection, to prevent boost module 1012 to be chronically at over-voltage operating status；And then the boost module 1012 in the present embodiment has There is higher job stability, the first DC voltage that boost module 1012 exports can keep safe amplitude range for a long time.

The rectification module 1013 connects the boost module 1012, and the rectification module 1013 is to first DC voltage It is rectified.

Boost module 1012 is by the first direct voltage output to rectification module 1013, in the boosting by boost module 1012 After effect, the first DC voltage that boost module 1012 exports has biggish noise component(s), can by rectification module 1013 Eliminate the harmonic wave and electromagnetic interference component in the first DC voltage, by rectification module 1013 for direct current energy rectified with Afterwards, the first DC voltage that rectification module 1013 exports has more preferably stable and safe threshold value, has ensured power supply branch 101 Voltage Transition Security；Rectification module 1013 in the present embodiment can be improved the electric energy efficiency of transmission and electricity of the first DC voltage Energy transmission quality, the electric energy that voltage conversion circuit 10 exports have safer performance.

Second filter module 1014 connects the rectification module 1013 and the voltage output module 104, and described second The first DC voltage after 1014 pairs of filter module rectifications exports after being filtered.

Wherein, the second filter module 1014 can completely eliminate the AC compounent in the first DC voltage, the second filtering mould The higher direct current energy of 1014 output accuracy of block, after power supply branch 101 carries out the operation such as boost conversion and rectification for electric energy, The amplitude of the first DC voltage can be enable to comply fully with the actual demand of technical staff by filtering, and branch of powering First DC voltage of 101 outputs has higher electric energy power, is conducive to improve voltage conversion circuit 10 for electric energy of powering Voltage converting accuracy, voltage conversion it is more efficient, power supply branch 101 have it is higher compatibility and the scope of application.

Fig. 2 shows the structure of power supply branch 101, power supply branch 101 has the function of good voltage conversion, and supplies Electric branch 101 is using 4 circuit modules (the first filter module 1011, boost module 1012, rectification module 1013 and the second filter Wave module 1014) realize for power electric energy conversion function, voltage conversion ultrahigh in efficiency, it is defeated by the power supply branch 101 The first DC voltage precision and stability with higher out, and then the electric energy amplitude exported by the second filter module 1014 The electrical energy demands of voltage output module 104 can be met, the electric energy that voltage output module 104 exports has higher electric energy matter Amount, easy to operate, the electric energy that the voltage conversion circuit 10 in the present embodiment exports is able to use electric equipment 20 and is in specified fortune Row state, more preferably, application range is more preferably extensive for the electric energy conversion performance of voltage conversion circuit 10.

As an alternative embodiment, Fig. 3 shows the physical circuit of boost module 1012 provided in this embodiment Structure, referring to Fig. 3, the boost module 1012 includes the first inductance L1, first switch tube M1, first resistor R1, the second electricity Hinder R2,3rd resistor R3, the 4th resistance R4 and the 5th resistance R5.

The first termination first filter module 1011 of the first inductance L1, the first end of the first inductance L1 access filter Wave treated power supply electric energy；The second end of the first inductance L1 and the first conduction terminal of the first switch tube M1 are connected to altogether The rectification module 1013, the first end of the first resistor R1, the first end of the second resistance R2, the 3rd resistor R3 First end, the first end of the 4th resistance R4 and the first end of the 5th resistance R5 be connected to the first switch tube altogether The second conduction terminal of M1, the second end of the second resistance R2, the second end of the 3rd resistor R3, the 4th resistance R4 Second end and the second end of the 5th resistance R5 are connected to ground GND altogether.

The second end of the first resistor R1 and the control terminal of the first switch tube M1 are connected to the voltage modulus of conversion altogether The control terminal of block 102 and the switch module 103, the second end of the first resistor R1 and the first switch tube M1 access altogether Switch control signal B2.

Optionally, first switch tube M1 is metal-oxide-semiconductor or triode, can change first by switch control signal B2 and open The conducting between the first conduction terminal of pipe M1 and the second conduction terminal of first switch tube M1 or off state are closed, so that first opens Closing pipe M1 can be realized the function of voltage amplification；Illustratively, first switch tube M1 is NMOS tube, in the boosting mould shown in Fig. 3 In the circuit structure of block 1012, the drain electrode of NMOS tube is the first conduction terminal of first switch tube M1, and the grid of NMOS tube is first The control terminal of switching tube M1, the source electrode of NMOS tube are the second conduction terminal of first switch tube M1；When switch control signal B2 is the When one level state, first switch tube M1 conducting, when switch control signal B2 is second electrical level state, first switch tube M1 is disconnected It opens；Therefore the present embodiment can change the conducting or shutdown of first switch tube M1 by the level state of switch control signal B2 State, so that boost module 1012 can be realized corresponding boost function；And then the boost module 1012 in the present embodiment has Good controllability, boost module 1012 can realize corresponding boost function according to the operational order of technical staff, give user Bring more preferably usage experience.

In the present embodiment, boost module 1012 using the first inductance L1 boosting and first switch tube M1 Boosting, when the first filter module 1011 will power electric energy be transmitted to the first inductance L1 when, pass through switch control signal B2 energy First switch tube M1 is enough set to be connected or turn off, after boosting, the first direct current pressing element of the output of boost module 1012 There are higher amplification factor, the first DC voltage power quality with higher；Therefore boost module 1012, which has, more simplifies Circuit structure, the power supply electric energy after filtering processing can be carried out by the first inductance L1 and first switch tube M1 accurate Boosting, has ensured the precision of electric energy amplification, and boost module 1012 can be realized higher boosting efficiency, electric energy for electric energy Conversion quality more preferably, the circuit structure of voltage conversion circuit 10 more simplify, voltage conversion process have it is more preferably controllable Property.

As an alternative embodiment, Fig. 4 shows the structural representation of switch module 103 provided in this embodiment, Referring to Fig. 4, the switch module 103 includes: the first conduction terminal C1, the second conduction terminal C2 and control terminal C3；Wherein, described First conduction terminal C1 of switch module 103 connects the control terminal of the first switch tube M1, the second conducting of the switch module 103 C2 is held to be grounded GND, the control terminal C3 of the switch module 103 connects the voltage transformation module 102.

The switch module 103 is according to the switch control signal B2 when the first switch tube M1 is turned off to described One switching tube M1 carries out overvoltage protection.

Wherein, the switch module 103 according to the switch control signal B2 when the first switch tube M1 is connected simultaneously Overvoltage protection is not carried out to the first switch tube M1.

In the present embodiment, switch control signal B2 can be transmitted to the control of switch module 103 by voltage transformation module 102 End C3 processed, can change the working condition of switch module 103 by switch control signal B2, and then enable switch module 103 Overvoltage protection is carried out to first switch tube M1 in real time, so that boost module 1012 can be realized normal, stable boost function, The physical security performance of first switch tube M1 is ensured；Electric energy is carried out in boost process in boost module 1012, first switch Pipe M1 is continually connected or is turned off according to the actual needs of technical staff；When first switch tube M1 is in shutdown moment, The control terminal of first switch tube M1 can gather biggish charge, cause the control terminal of first switch tube M1 that can have biggish electricity Pressure, first switch tube M1 are in over-voltage operating status, and this over-voltage operating status will be to the physical security of first switch tube M1 Cause serious damage；If first switch tube M1 is chronically at over-voltage operating status, first switch tube M1 can be due to excessive heating And it is completely consumed；Therefore in first switch tube M1 shutdown moment, it can release first switch tube M1's by switch module 103 The charge of control terminal, so that the control terminal voltage of first switch tube M1 is in safe operating status, first switch tube M1 always Control terminal peak current by switch module 103 be transmitted to ground GND, ensured the physical security performance of first switch tube M1 And job stability；And then the present embodiment can carry out overvoltage protection to first switch tube M1 in time by switch module 103, First switch tube M1 can continually carry out safe conducting or safe shutdown, and boost module 1012 has first switch tube M1 There is higher overvoltage protection response speed, it is straight that boost module 1012 can export corresponding first according to the actual demand of technical staff Galvanic electricity pressure greatly improves the boosting security performance of first switch tube M1 by switch module 103, and security level is higher.

As an alternative embodiment, Fig. 5 shows the physical circuit knot of switch module 103 provided in this embodiment Structure, referring to Fig. 5, the switch module 103 includes second switch Q1, the 6th resistance R6, the electricity of the 7th resistance R7 and the 8th Hinder R8.

The first conduction terminal of the second switch Q1 and the first end of the 6th resistance R6 connect to form the switch altogether First conduction terminal of module 103.

The control of the second switch Q1 terminates the first end of the 7th resistance R7.

The second end of the 6th resistance R6 and the second end of the 7th resistance R7 connect to form the switch module 103 altogether Control terminal.

The second conducting of the second switch Q1 terminates the first end of the 8th resistance R8.

The second end of the 8th resistance R8 is the second conduction terminal of the switch module 103.

Wherein, when the first switch tube M1 is turned off, the second switch Q1 closure.

In first switch tube M1 closure, the second switch Q1 shutdown；And then first switch in the present embodiment There is pipe M1 and second switch Q1 antipodal power supply polarity is connected, therefore work as the control terminal and second of first switch tube M1 The control terminal of switching tube Q1 accesses switch control signal B2 altogether, can control first switch tube simultaneously by switch control signal B2 The conducting or shutdown of M1 and second switch Q1, so that switch module 103 can carry out overvoltage protection to first switch tube M1, It is handled so that boost module 1012 can carry out stable boosting for the power supply electric energy after filtering processing, security performance is high.

Optionally, the second switch Q1 is metal-oxide-semiconductor or triode, passes through the level state of switch control signal B2 Conducting or the off state of second switch Q1 can be changed in real time, such as when the duty ratio of switch control signal B2 becomes When change, the turn-on time of second switch Q1 can also occur to change accordingly, and switch module 103 has good controllability Energy；Illustratively, second switch Q1 is PNP type triode, the transmitting extremely the first of second switch Q1 of PNP type triode Conduction terminal, the base stage of PNP type triode are the control terminal of second switch Q1, the transmitting of PNP type triode extremely second switch The second conduction terminal of pipe Q1；And then leading for PNP type triode can be changed by the level state of switch control signal B2 in real time Logical or off state, the control terminal charge of first switch tube M1 so that switch module 103 can release in time, switch module 103 have more simplified circuit structure.

In order to which the present embodiment is better described, switch module 103 carries out the principle of overvoltage protection to first switch tube M1, under Face illustrates the course of work of switch module 103 by a specific example in conjunction with attached drawing 3 to attached drawing 5, specific as follows:

When switch control signal B2 is the first level state, first switch tube M1 conducting, second switch Q1 shutdown, this When second switch Q1 the first conduction terminal and the second conduction terminal between be in off state, boost module 1012 passes through the first electricity Boosting can be carried out for electric energy by feeling L1 and first switch tube M1, and the voltage of the control terminal of first switch tube M1 is at this time Normal state, second switch Q1 can not carry out overvoltage protection for first switch tube M1, and boost module 1012 can be for Power supply electric energy after filtering processing carries out boosting processing, has ensured the efficiency of electric energy conversion, reduces the power consumption of electric energy conversion.

When switch control signal B2 is second electrical level state, first switch tube M1 shutdown, second switch Q1 conducting, First switch tube M1 shutdown moment, the control terminal of first switch tube M1 voltage with higher, at this time the of second switch Q1 Short-circuit condition is between one conduction terminal and the second conduction terminal, then the charge of the control terminal of first switch tube M1 passes through: second opens The first conduction terminal, the second conduction terminal of second switch Q1 and the 8th resistance R8 for closing pipe Q1, successively release to ground GND, with So that the voltage of the control terminal of first switch tube M1 is dropped rapidly to safe range, first switch tube M1 is prevented to be in over-voltage Operating status, to realize the over-voltage protecting function for first switch tube M1, therefore the present embodiment passes through second switch Q1 energy Enough shutdown security performances for ensureing first switch tube M1 in time, first switch tube M1 physical security performance with higher rise Die block 1012 is at safe and stable operating status, has ensured the voltage transform security of the voltage conversion circuit 10 Performance.

Therefore in Fig. 5 the circuit structure of switch module 103 is shown, the can be changed in real time by switch control signal B2 The conducting of two switching tube Q1 perhaps conducting or turn-off criterion of the off state using second switch Q1, rapidly to release The voltage of the control terminal of first switch tube M1 avoids first switch tube M1 from being chronically at over-voltage operating status, so that first switch Pipe M1 is able to maintain safe state in shutdown moment, first switch tube M1；Meanwhile if first switch tube M1 is not in shutdown Moment, then switch module 103 can't carry out overvoltage protection to first switch tube M1, and boost module 1012 is at normally Working condition；Therefore the switch module 103 in the present embodiment will not influence the working efficiency of first switch tube M1, and can rise To first switch tube M1 shutdown moment over-voltage protecting function；Therefore the switch module 103 in the present embodiment has more simple The circuit structure of change can carry out quick overvoltage protection to first switch tube M1 by second switch Q1, for over-voltage shape The response speed of state is exceedingly fast, and greatly improves the security performance of first switch tube M1, boost module 1012 can be to filtering at Power supply electric energy after reason carries out the boost conversion of safety, reduces electric energy loss of the power supply branch 101 in voltage conversion process, Voltage conversion circuit 10 is improved for the transfer efficiency and Transition Security of electric energy, first switch tube M1 has in boost process There is the characteristic of low noise, so that voltage conversion performance is more preferably, voltage conversion circuit 10 be can be applied in each industrial circle.

As an alternative embodiment, first filter module 1011 includes at least one first capacitor；According to " separated by direct communication " principle of capacitor can remove power supply electricity by first capacitor when first capacitor accesses power supply electric energy in time Can AC compounent, with ensure the first filter module 1011 can DC power output, improve the precision of electric energy.

The rectification module 1013 includes first diode, and the anode of the first diode connects the boost module 1012, the cathode of the first diode connects second filter module 1014；Wherein, first diode has one-way conduction Property, if there are AC compounents in the first DC voltage, the exchange in the first DC voltage can be prevented by first diode Component is by rectification module 1013, and rectification module 1013 has overly simplified circuit structure, for the whole of the first DC voltage Stream precision is high, has ensured that the voltage converting accuracy of power supply branch 101, power supply branch 101 are compatible with higher circuit structure Property.

Second filter module 1014 includes at least one second capacitor；Optionally, technical staff can be according to specific Application scenarios select the quantity of the second capacitor in the second filter module 1014, and the circuit structure of the second filter module 1014 has pole Strong compatibility is able to carry out safety, accurate filtering processing for the first DC voltage after rectification, and power supply branch 101 is defeated The first DC voltage out has higher precision, and power supply branch 101 can be answered according to the actual demand output phase of technical staff First DC voltage of amplitude, the voltage conversion performance of voltage conversion circuit 10 is more preferably.

Illustratively, the first filter module 1011 includes a first capacitor, then the first termination power supply electricity of first capacitor Source VP and boost module 1012, the second end ground connection of first capacitor；Second filter module 1014 includes multiple second electricity in parallel Hold, the first end of plurality of second capacitor is connected to rectification module 1013 and voltage output module 104 altogether, multiple second capacitors Second end is grounded altogether；Therefore the first filter module 1011 in the present embodiment and the second filter module 1014 can be for electric energy realities Function is now accurately filtered so that the second filter module 1014 can the higher direct current energy of output accuracy, pass through power supply Branch 101 export the first DC voltage can driving voltage conversion circuit 10 generate specified electric energy, to ensure electrical equipment The circuit compatibility of 20 operating status always in safety, branch 101 of powering is stronger, and the scope of application is wider, voltage conversion electricity Road 10 can realize accurate voltage conversion function to electric energy, bring good usage experience to user.

As an alternative embodiment, the voltage output module 104 includes connector.

First signal input part of the connector connects the power supply branch 101, the second signal input of the connector The voltage transformation module 102 is terminated, the signal output end of the connector connects the electrical equipment 20.

Wherein, connector electric power compatibility with higher, voltage conversion circuit 10 can be compatible with suitable by the connector It can by connector after 10 pairs of power supply electric energy of voltage conversion circuit convert for various types of electrical equipments 20 By the second direct voltage output to electrical equipment 20, the work safety of electrical equipment 20 can be ensured by the second DC voltage Property, improve the use scope of voltage conversion circuit.

Illustratively, the connector in the present embodiment is realized using the pin terminal in example technique, for example, contact pin First communication terminal of terminal is the first signal input part of connector, and the second communication terminal of pin terminal is the second letter of connector Number input terminal, the third communication terminal of pin terminal are the signal output end of connector；When the signal input part (packet of pin terminal Include: the first signal input part and second signal input terminal) when being respectively connected to the first DC voltage and voltage drive signals B1, contact pin Terminal is adjusted the amplitude of the first DC voltage according to the control information in voltage drive signals B1, so that pin terminal Signal output end can export the second DC voltage of amplitude and specific according to the circuit function demand of technical staff；Therefore this implementation The compatible performance of connector electric power with higher in example, and the voltage output performance controllability with higher of connector and Stability, voltage conversion circuit 10 can be suitable for various types of electric system, with to electricity consumption by the connector Equipment 20 provides specified electric energy, the safety and compatibility of the transmission of the electric energy with higher of voltage conversion circuit 10；Pass through electricity Pressure output module 104 not only simplifies the circuit structure of voltage conversion circuit 10, and enables voltage conversion circuit 10 according to technology The actual demand of personnel exports corresponding second DC voltage, brings more preferably usage experience to user.

As an alternative embodiment, the voltage transformation module 102 includes voltage conversion chip.

Wherein, the dim signal input pin of the voltage conversion chip accesses the dimming control signal A1, the electricity The modulated signal input pin of conversion chip is pressed to access the pulse-width signal A2, the gate pin of the voltage conversion chip The switch module 103 is connect, is exported switch control signal B2 to switch module by the gate pin of voltage conversion chip 103, the over-voltage protecting function for branch 101 of powering can be realized with driving switch module 103；The voltage conversion chip Driving signal output pin connects the voltage output module 104, and the driving signal output pin of voltage conversion chip drives voltage Dynamic signal B1 is exported to voltage output module 104, and the voltage drive signals B1 includes voltage activation bit, and then passes through voltage Driving signal B1 can change the working condition of voltage output module 104 in time, so that the second of the output of voltage output module 104 DC voltage can comply fully with the nominal operation demand of electrical equipment 20.

As an alternative embodiment, the model of the voltage conversion chip are as follows: OB3365C DIP16, light modulation control Signal A1 and pulse-width signal A2 processed include the operation information of technical staff, are believed by dimming control signal A1 and pulsewidth modulation Number A2 can control the function switching signal of voltage conversion chip in time, which can be according to the behaviour of technical staff Make information output voltage driving signal B1 and switch control signal B2, to change the voltage conversion performance of voltage conversion circuit 10； Voltage conversion chip in the present embodiment has complete function switching signal, voltage can be made to convert by voltage conversion chip Circuit 10 exports specified direct current energy, improves the control stability and flexibility of voltage conversion circuit 10, in the present embodiment The circuit structure of voltage conversion circuit 10 has high compatibility performance, advantageously reduces the cost of voltage conversion, simplifies voltage The step of conversion.

As an alternative embodiment, Fig. 6 shows the specific electricity of voltage transformation module 102 provided in this embodiment Line structure, referring to Fig. 6, voltage transformation module 102 includes voltage conversion chip U1, the 9th resistance R9, the tenth resistance R10, the 11 resistance R11, twelfth resistor R12, thirteenth resistor R13, the 14th resistance R14, the 15th resistance R15, the 16th electricity Hinder R16, the 17th resistance R17, the 18th resistance R18, the 19th resistance R19, the 20th resistance R20, the 21st resistance R21, the 22nd resistance R22, the 23rd resistance R23, the 24th resistance R24, the 25th resistance R25, third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 9th capacitor C9, the tenth capacitor C10 and the 11st capacitor C11.

The first end of the 9th resistance R9 and the first end of the third capacitor C3 are connected to the voltage conversion chip altogether Second the first DC power supply VCC1 of termination of power input the pin VIN, the 9th resistance R9 of U1, the third capacitor C3's Second end is grounded GND.

Optionally, the first DC power supply VCC1 is+10V~+14V DC power supply, and the first DC power supply VCC1 will be straight Galvanic electricity can be transmitted to the power input pin VIN of voltage conversion chip U1, so that voltage conversion chip U1 is at safety surely Fixed working condition, voltage conversion chip U1 control stability with higher pass through voltage to realize the conversion function of electric energy Conversion module 102 can ensure the controllability of voltage conversion circuit 10.

The first end of the tenth resistance R10, the first end of the 4th capacitor C4 and the eleventh resistor R11 First end is connected to the dim signal input pin ADIM of the voltage conversion chip U1, the second end of the tenth resistance R10 altogether The second end for being connected to ground GND, the eleventh resistor R11 altogether with the second end of the 4th capacitor C4 is the voltage modulus of conversion The dim signal input terminal of block 102 can carry out partial pressure adjusting for voltage conversion chip U1 by dimming control signal A1, with Voltage conversion chip U1 is set to realize different signal control functions, voltage conversion circuit 10 can realize power supply electric energy adaptive The voltage conversion function answered can change the voltage magnitude of the output of voltage conversion circuit 10 by dimming control signal A1 in real time.

The first end of the twelfth resistor R12 and the first end of the 6th capacitor C6 are connected to the voltage conversion core altogether The first end of the second termination the 5th capacitor C5 of the compensation pins CMP, the twelfth resistor R12 of piece U1, the described 6th The second end of capacitor C6 and the second end of the 5th capacitor C5 are connected to ground GND altogether；Voltage can be made to turn by compensation pins CMP The centralized control state that chip U1 is constantly in stable is changed, so that voltage conversion chip U1 can steadily realize that voltage is converted Function improves the stability of voltage conversion, avoids the occurrence of circuit control error.

Wherein, the first end of the thirteenth resistor R13, the first end of the 7th capacitor C7 and the 14th electricity The first end of resistance R14 is connected to modulated signal the input pin PWM, the thirteenth resistor R13 of the voltage conversion chip U1 altogether Second end be the voltage transformation module modulated signal input terminal, by pulse-width signal A2 can change voltage conversion The signal control function of chip U1, so that voltage conversion circuit 10 exports specific DC voltage, to meet the reality of technical staff Border demand；Exemplary, the working condition of voltage conversion chip U1 can be changed in the duty ratio by changing pulse-width signal A2, with Voltage conversion chip U1 output is set to include the switch control signal B2 of different control information；When the duty ratio of pulse-width signal A2 When changing, it can also occur to change accordingly by the second DC voltage amplitude that voltage conversion circuit 10 exports, pass through arteries and veins Wide modulated signal A2 can neatly manipulate the electric energy transition status of voltage conversion chip U1, voltage conversion chip in the present embodiment The working condition of U1 and the situation of change of both duty ratios of pulse-width signal A2 are consistent, and voltage conversion process has More simplified handling.

The second end of the 7th capacitor C7, the second end of the 14th resistance R14, the 8th capacitor C8 first The first end that the first end of end and the 15th resistance R15 are connected to ground GND, the 16th resistance R16 altogether is the electricity Press the enable end of conversion module 102, the second end of the 16th resistance R16, the second end of the 8th capacitor C8 and institute The second end for stating the 15th resistance R15 is connected to the enable pin ENA of the voltage conversion chip U1, the voltage transformation module altogether Enable signal is accessed in 102 enable end, and it is in running order to wake up the voltage conversion chip U1 by enable signal, into And voltage conversion chip U1 can be always in safe centralized control state；When enable signal is in different level states When, voltage conversion chip U1 can be at work or halted state accordingly, can ensure that voltage converts core by enable signal The physical security of piece U1, so that voltage transformation module 102 can realize centralized control functions according to the operational order of technical staff, Voltage conversion chip U1 has more flexible handling.

The ground pin of voltage conversion chip U1 is grounded GND.

The first end of the 9th capacitor C9 is grounded GND, the second end of the 9th capacitor C9 and the 17th resistance The first end of R17 is connected to the power pin VCC of the voltage conversion chip U1 altogether, can be ensured by power pin VCC described The job stability of voltage conversion chip U1 internal electronic component；The second end and the described tenth of the 17th resistance R17 The first end of nine resistance R19 is connected to the power drives pin RI of the voltage conversion chip U1 altogether, passes through power drives pin RI Can driving voltage conversion chip U1 enter normal operating conditions；The second end and the described 11st of the 19th resistance R19 The first end of capacitor C11 is connected to ground GND altogether.

The second end of the 11st capacitor C11 and the first end of the 18th resistance R18 are connected to the voltage altogether and turn The second end for changing chip selection signal the output pin CS, the 18th resistance R18 of chip U1 is the voltage transformation module 102 The chip selection signal output of chip selection signal output end, the voltage transformation module 102 terminates the power supply branch 101, by described The chip selection signal output end of voltage transformation module 102 exports chip selection signal to power supply branch 101, when chip selection signal is in difference Level state when, by the chip selection signal can drive power supply branch 101 carry out voltage conversion；Such as pass through chip selection signal energy Enough power supply branches 101 that changes are for electric energy amplification factor or minification, so that the first direct current that power supply branch 101 exports Pressing element has different amplitudes, and voltage conversion circuit 10 can export specified direct current energy to electrical equipment 20, electrical equipment 20 Safe working condition can be chronically at；Therefore the voltage transformation module 102 in the present embodiment is controllable by chip selection signal Voltage transition status, the control response very high speed of voltage conversion process, voltage conversion circuit 10 can be according to the realities of technical staff Border circuit requirements export corresponding direct current energy, different types of electrical equipment 20 physical security performance with higher.

The first end of the tenth capacitor C10, the first end of the 20th resistance R20 and the 21st resistance The first end of R21 is connected to the of overvoltage protection detection the pin OVP, the tenth capacitor C10 of the voltage conversion chip U1 altogether The second end of two ends and the 21st resistance R21 be connected to altogether ground GND, the 20th resistance R20 second termination described in The first end of 22nd resistance R22, the second termination power supply branch 101 of the 22nd resistance R22；When voltage turns When changing the working voltage in the overvoltage protection detection pin OVP access power supply branch 101 of chip U1, pass through voltage conversion chip U1 Whether the working voltage being able to detect in power supply branch 101 is in overvoltage condition, and voltage conversion chip U1 can be accurate in real time Whether the voltage conversion process of monitoring power supply branch 101 there is exception；If voltage conversion chip U1 is detected at power supply branch 101 In overvoltage condition, then voltage conversion chip U1 can the overvoltage condition at once to power supply branch 101 make a response, to ensure power supply The voltage transform security performance of branch 101；Therefore the voltage conversion chip U1 in the present embodiment can be for power supply branch 101 Overvoltage condition detection sensitivity with higher and detection accuracy, and then voltage conversion chip U1 is for the mistake for branch 101 of powering Pressure condition is able to carry out fast-response control, improves voltage transformation module 102 for overvoltage condition in voltage conversion process Control efficiency and control accuracy.The voltage conversion stability of voltage conversion circuit 10 is higher.

The first end of the 23rd resistance R23 and the first end of the 24th resistance R24 are connected to the electricity altogether Press the maximum current of conversion chip U1 that pin ISET, the second end and the described 24th of the 23rd resistance R23 are set The second end of resistance R24 is connected to ground GND altogether；Pin ISET, which is arranged, by maximum current can ensure inside voltage conversion chip U1 Running current be in the range of safety, voltage conversion chip U1 can realize normal concentrate according to the operational order of technical staff The security performance of control function, the internal electronic component of voltage conversion chip U1 is higher；Voltage conversion chip U1 can be long-term The working condition of safety is kept, the control robustness and control stability of voltage transformation module 102 are higher, and compatibility is stronger.

The gate pin GATE of the voltage conversion chip U1 meets the switch module 103, the voltage conversion chip U1 The switch control signal B2 is exported to switch module 103 by gate pin GATE, to realize the function of overvoltage protection.

The of the first driving signal output pin LED1 and the voltage conversion chip U1 of the voltage conversion chip U1 Two driving signal output pin LED2 is connected to the first end of the 26th resistance R26 altogether, the voltage conversion chip U1's The fourth drive signal output pin LED4 of the third driving signal output pin LED3 and voltage conversion chip U1 is connected to altogether The first end of the 25th resistance R25, the second end of the 25th resistance R25 and the 26th resistance R26 The second termination voltage output module 104, the driving signal output pin of the voltage conversion chip U1 (includes: first Driving signal output pin LED1, the second driving signal output pin LED2, third driving signal output pin LED3 and Four driving signal output pin LED4) the voltage drive signals B1 is exported to voltage output module 104, it is driven by voltage Signal B1 can change the voltage magnitude of the output of voltage output module 104, so that the second direct current that voltage output module 104 exports Voltage can meet the rated power demand of electrical equipment 20；The voltage conversion function of the voltage conversion circuit 10 has higher Controllability, and then the second DC voltage exported after overvoltage is converted can fully meet the circuit function demand of user, The voltage conversion function of voltage conversion circuit 10 has higher compatibility and practical value.

In the particular circuit configurations that Fig. 6 shows voltage transformation module 102, voltage transformation module 102 is converted by voltage Chip U1 can be realized circuit centralized control functions, and voltage conversion chip U1 can be parsed and be identified dimming control signal A1 and arteries and veins The circuit control information that both wide modulated signal A2 include, the voltage conversion chip U1 can be according to the operations of technical staff Instruction makes: 103 pairs of power supply branches 101 of switch module carry out overvoltage protection, are realized according to switch control signal B2 for switching molding The higher control response accuracy of block 103, voltage conversion circuit 10 carry out safe and stable voltage for power supply electric energy and convert, The accuracy and stability of voltage conversion are higher；Voltage conversion chip U1 can generate voltage drive signals B1 in real time, pass through voltage Driving signal B1 can change the amplitude of the second DC voltage in time；When voltage conversion circuit 10 is applied in different electric system When, voltage conversion circuit 10 can export the second specified DC voltage according to voltage drive signals B1, pass through the second DC voltage Driving electrical equipment 20 is in specified working condition, has ensured the operational safety of electrical equipment 20, voltage conversion circuit 10 can It is widely applicable in each different types of electrical equipment；Therefore the voltage transformation module 102 in the present embodiment has more Circuit structure that is compatible and simplifying, voltage conversion chip U1 can be instructed depending on the user's operation carries out over-voltage to voltage conversion process It protects and voltage conversion process is regulated and controled, power supply branch 101 has the higher voltage conversion performance of safety, and leads to The second DC voltage that overvoltage output module 104 exports can drive electrical equipment 20 to be in stable operating status, compatible Property is stronger；Voltage transformation module 102 in the present embodiment has multiple functional control performance, and the usage experience of user is preferable, When voltage conversion circuit 10 is applied to different industrial technical fields, voltage conversion circuit 10 can be according to the type of electrical equipment 20 The voltage conversion function of adaptively changing itself, and the safety and reliability of voltage conversion has also obtained greatly being promoted, Keep higher stable and compatible in the power system to be conducive to voltage conversion circuit 10.

As an alternative embodiment, the electrical equipment 20 is lamp bar or motor.

It should be noted that the type of above-mentioned electrical equipment 20 is only an embodiment, technology limiting, ability are not constituted Field technique personnel can also convert the voltage into circuit 10 and be applied in other industrial circles, such as power supply design, electrical grid transmission etc., It does not limit this.

Referring to above-mentioned each embodiment, power supply electric energy can be converted to difference by voltage conversion circuit 10 by the present embodiment The direct current energy of amplitude, to drive electrical equipment 20 to be in stable operating status；Illustratively, pass through voltage conversion circuit 10 Specified power output to lamp bar, lamp bar can be at normal luminance, realize good illuminating effect；And And voltage conversion circuit 10 has the over-voltage protecting function of itself, voltage conversion process is at safety, stable state, and Routinely DC power output, voltage conversion process can have higher reliability and flexibility, voltage conversion circuit 10 Direct current energy is routinely provided to electrical equipment 20, electrical equipment 20 can be chronically at specified operating status；Voltage conversion electricity Road 10 has lower electric energy power consumption, can safely be suitable for each different industrial technical field.

Fig. 7 shows the structural representation of display device 70 provided in this embodiment, as shown in fig. 7, the display device 70 It include: voltage conversion circuit 10 and backlight 701 as described above；The backlight 701 meets the voltage conversion circuit 10, institute It states voltage conversion circuit 10 to export direct current energy to backlight 701, so that the backlight 701 is in rated operation.

In one embodiment, display device 70 can be to be provided with any type of of above-mentioned voltage conversion circuit 10 to show Showing device, such as LCD (Liquid Crystal Display, liquid crystal display device), OLED (Organic Electroluminesence Display, Organic Electricity laser display) display device, QLED (Quantum Dot Light Emitting Diodes, light emitting diode with quantum dots) display device or curved-surface display device etc..

In display device 70, backlight 701 can realize luminous effect, when backlight 701 accesses direct current energy to protect Normal working condition is held, and then backlight 701 can issue the light of different color and brightness according to the actual demand of technical staff Source, display device 70 show corresponding image/video, bring vision dynamic to feel to user；In conjunction with the reality of above-mentioned Fig. 1 to Fig. 6 Example is applied, when voltage conversion circuit 10 leads to applied to display device 70 when voltage conversion circuit 10 accesses extraneous power supply electric energy Overvoltage conversion circuit 10 can adaptively convert power supply electric energy, to drive backlight 701 to be in specified work shape State, display device 70 steadily can show state in video, ensure the work safety of display device 70；Voltage turns simultaneously Circuit 10 is changed with over-voltage protecting function, and then voltage conversion circuit 10 is at safe operating status, display device 70 Internal structure have higher physical security grade；Therefore the electric energy inside the display device 70 in the present embodiment can keep volume The safety of fixed amplitude, circuit is higher, and display device 70 can be suitable for each different industrial technical field, service life Longer, failure rate is lower, and reliability and stability are higher, and then display device 70 can be real-time according to the actual demand of technical staff Show video, more preferably, practical value is higher for the visual experience of user；Display device in example technique is efficiently solved to access Electric energy it is unstable, the power failure rate of display device is higher, it is difficult to stable video be kept to show state, and display device Internal circuit configuration be easy suffered damage due to overvoltage condition, reduce the video display security of display device, use Service life is shorter, the bad problem of the usage experience of user.

In conclusion the voltage conversion circuit 10 in the application can will power according to the actual demand of technical staff, electric energy is steady Direct current energy that is fixed, being rapidly transformed into respective magnitudes, to ensure job stability and the safety of electrical equipment, and then passes through Voltage conversion circuit 10 can be realized preferable voltage conversion performance；And voltage conversion circuit 10 can carry out overvoltage protection, protect The physical security and reliability of voltage conversion circuit 10 are hindered, it is therefore prevented that voltage conversion circuit 10 meets with due to over-voltage/overcurrent The problem of being damaged；Therefore voltage conversion circuit 10 has good controllability, and the voltage conversion circuit 10 is in technical staff Manipulation under neatly DC power output, voltage conversion performance is more stable, and compatibility is stronger, in voltage conversion circuit 10 Running current is in the range of safety, has ensured that physical security performance, usage experience more preferably, for voltage in this field convert skill Important positive effect is played in the popularization and application of art, will generate good industrial production value.

Various embodiments are described to various devices, circuit, device, system and or method herein.It elaborates very much Specific details is to provide general construction, the function, system of the embodiment that the sum as described in the description is shown in the accompanying drawings The thorough understanding made and used.However it will be understood by those skilled in the art that embodiment can be in not such certain detail It is carried out in the case where section.In other examples, well known operation, component and element is described in detail, in order to avoid make in specification In embodiment indigestion.It will be understood by those skilled in the art that being unrestricted in the embodiment with shown in herein Property example, and therefore it can be appreciated that, can be in specific structure and function details disclosed herein representative and and different The range of definite limitation embodiment.

Throughout the specification to " various embodiments ", " in embodiments ", " embodiment " or " embodiment party The reference of formula " etc., which is meant, is included at least one embodiment about a particular feature, structure, or characteristic described in embodiment In.Therefore, phrase " in various embodiments ", " in some embodiments ", " in one embodiment " or " implementing In mode " etc. the appearance in appropriate place throughout the specification be not necessarily all referring to same embodiment.In addition, specific spy Sign, structure or characteristic can combine in any suitable manner in one or more embodiments.Implement accordingly, with respect to one The a particular feature, structure, or characteristic that mode shows or describes can entirely or partly with one or more of the other embodiment spy Sign, structure or characteristic are combined, without assuming that such combination is not illogical or non-functional limitation.Any side To with reference to (for example, add, subtract, top, lower part, upwards, downwards, the left side, the right, to the left, to the right, top, bottom ... On ... under, it is vertical, horizontal, clockwise and anticlockwise) purpose to be for identification to help reader to understand present disclosure, And limitation is not generated, especially with regard to the position of embodiment, orientation or use.

Although describing certain embodiments above with some the level of detail, those of skill in the art can be to institute Disclosed embodiment makes many changes without departing from the scope of the present disclosure.Connection is with reference to (for example, attachment, coupling, connection Deng) should be widely interpreted, and may include the intermediate member between the connection of element and relative motion between elements.Cause This, connection reference does not necessarily imply that two elements are directly connected to/couple and are in fixed relationship each other." such as " entire Use in specification should be widely interpreted and for providing the non-limitative example of embodiment of the present disclosure, and the disclosure It is not limited to such example.Being intended that all affairs for including in the foregoing description or be shown in the accompanying drawings should be interpreted only It is illustrative rather than restrictive.The variation in details or structure can be made without departing from the disclosure.

The above is only the preferred embodiments of the application, not to limit the application, it is all in spirit herein and Made any modifications, equivalent replacements, and improvements etc., should be included within the scope of protection of this application within principle.

Claims

1. a kind of voltage conversion circuit characterized by comprising

Power supply branch, the first termination power supply of the power supply branch, what the power supply branch exported the power supply Power supply electric energy is converted to the first DC voltage；

Voltage transformation module, the dim signal input terminal of the voltage transformation module access dimming control signal, and the voltage turns The modulated signal input terminal for changing the mold block accesses pulse-width signal, and the voltage transformation module is raw according to the dimming control signal Switch control signal is generated at voltage drive signals and according to the pulse-width signal；

Switch module, the switch module are connected between the voltage transformation module and the power supply branch, the switching molding Root tuber carries out overvoltage protection to the power supply branch according to the switch control signal；And

Voltage output module, the voltage output module connect the power supply second end of branch, the voltage transformation module and Electrical equipment, the voltage output module export the second direct current according to first DC voltage and the voltage drive signals Pressure, so that the electrical equipment is in rated operation.

2. voltage conversion circuit according to claim 1, which is characterized in that the power supply branch includes:

First filter module, first filter module connect the power supply, and first filter module is to the power supply electricity It can be carried out filtering processing；

Boost module, the boost module connect first filter module, the voltage transformation module and the switch module, The boost module boosts the power supply electric energy after the filtering processing according to the switch control signal to obtain described One DC voltage；

Rectification module, the rectification module connect the boost module, and the rectification module carries out first DC voltage whole Stream；And

Second filter module, second filter module connect the rectification module and the voltage output module, second filter Wave module exports after being filtered to the first DC voltage after rectification.

3. voltage conversion circuit according to claim 2, which is characterized in that the boost module includes the first inductance, the One switching tube, first resistor, second resistance, 3rd resistor, the 4th resistance and the 5th resistance；

First termination first filter module of first inductance, the second end and the first switch of first inductance First conduction terminal of pipe is connected to the rectification module, the first end of the first resistor, the first end of the second resistance, institute altogether The first end, the first end of the 4th resistance and the first end of the 5th resistance for stating 3rd resistor are connected to described first altogether Second conduction terminal of switching tube, the second end of the second resistance, the second end of the 3rd resistor, the 4th resistance The second end of two ends and the 5th resistance is connected to ground altogether；

The control terminal of the second end of the first resistor and the first switch tube is connected to the voltage transformation module and described altogether The control terminal of switch module, the second end of the first resistor and the first switch tube accesses the switch control signal altogether.

4. voltage conversion circuit according to claim 3, which is characterized in that the first conducting termination institute of the switch module The control terminal of first switch tube is stated, the second conduction terminal of the switch module is grounded, described in the control termination of the switch module Voltage transformation module；

The switch module according to the switch control signal when the first switch tube is turned off to the first switch tube into Row overvoltage protection.

5. voltage conversion circuit according to claim 4, which is characterized in that the switch module include second switch, 6th resistance, the 7th resistance and the 8th resistance；

First conduction terminal of the second switch and the first end of the 6th resistance connect to form the of the switch module altogether One conduction terminal；

The second end of 6th resistance and the second end of the 7th resistance connect the control terminal to form the switch module altogether；

Wherein, when the first switch tube turns off, the second switch closure.

6. voltage conversion circuit according to claim 2, which is characterized in that first filter module includes at least one First capacitor；

The rectification module includes first diode, and the anode of the first diode connects the boost module, and the described 1st The cathode of pole pipe connects second filter module；

Second filter module includes at least one second capacitor.

7. voltage conversion circuit according to claim 1, which is characterized in that the voltage output module includes connector；

First signal input part of the connector connects the power supply branch, and the second signal of the connector inputs described in termination Voltage transformation module, the signal output end of the connector connect the electrical equipment.

8. voltage conversion circuit according to claim 1, which is characterized in that the voltage transformation module includes voltage conversion Chip；

The dim signal input pin of the voltage conversion chip accesses the dimming control signal, the voltage conversion chip Modulated signal input pin accesses the pulse-width signal, and the gate pin of the voltage conversion chip connects the switching molding The driving signal output pin of block, the voltage conversion chip connects the voltage output module.

9. voltage conversion circuit according to claim 1, which is characterized in that the electrical equipment is lamp bar or motor.

10. a kind of display device characterized by comprising

The voltage conversion circuit as described in claim any one of 1-9；And

Backlight, the backlight connect the voltage conversion circuit, and the voltage conversion circuit exports direct current energy to backlight Source, so that the backlight is in rated operation.