CN109546847A - Synchronization breaking circuit, driving circuit and the synchronous cut-off method of Switching Power Supply - Google Patents

Synchronization breaking circuit, driving circuit and the synchronous cut-off method of Switching Power Supply Download PDF

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Publication number
CN109546847A
CN109546847A CN201910040768.4A CN201910040768A CN109546847A CN 109546847 A CN109546847 A CN 109546847A CN 201910040768 A CN201910040768 A CN 201910040768A CN 109546847 A CN109546847 A CN 109546847A
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China
Prior art keywords
module
switch
resistance
power supply
switching power
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CN201910040768.4A
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Chinese (zh)
Inventor
王智勇
王平
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CHONGQING HUIKE JINYANG TECHNOLOGY CO., LTD.
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Hefei Huike Jinyang Technology Co Ltd
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Priority to CN201910040768.4A priority Critical patent/CN109546847A/en
Publication of CN109546847A publication Critical patent/CN109546847A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The synchronization cut-off method of a kind of synchronization breaking circuit of Switching Power Supply, switch power source driving circuit and Switching Power Supply, the synchronous breaking circuit includes acquisition module, switch module and electric power driving module；Acquisition module is acquired to obtain sampling parameter to the parameters of electric power of current supply circuit；Switch module then exports cut-off signals less than the first parameter preset in sampling parameter；Electric power driving module makes the current supply circuit of Switching Power Supply stop transmission electric energy under the driving of cut-off signals；Synchronization breaking circuit in the embodiment of the present application can in real time, accurately the energy fluctuation situation of the current supply circuit of pilot switch power supply solves the hiccup phenomenon of Switching Power Supply according to the power output of the synchronous shutdown Switching Power Supply of the actual demand of technical staff；The Switching Power Supply has more preferably Electric control performance.

Description

Synchronization breaking circuit, driving circuit and the synchronous cut-off method of Switching Power Supply
Technical field
The application belongs to the synchronization breaking circuit in electronic circuit technology field more particularly to a kind of Switching Power Supply, switch electricity The synchronization cut-off method of source driving circuit and Switching Power Supply.
Background technique
Switch power technology has obtained extremely widespread application in power electronics, and the Switching Power Supply has access to the external world Electric energy, and extraneous electric energy is converted and is transmitted, so that Switching Power Supply can be according to the actual demand of technical staff The voltage/current for exporting respective magnitudes can make electronic component specified by the voltage/current that Switching Power Supply exports Working condition has ensured the trouble free service performance of corresponding electronic component；Technical staff is led by control switch power circuit Logical or turn off process so that switching power circuit converts electrical energy into different amplitudes, the switching power circuit have compared with High controllability and practical value；Since Switching Power Supply can be compatible with output multiple groups electric energy, to meet each industrial technology neck The work requirements of electronic equipment in domain, therefore switching power circuit has become that promote can not in current Electronic Development of Information Industry Or scarce a part.
Power-off protection function is substantially absent in Switching Power Supply in traditional technology, if the electric energy of input is too low or inputs Electric energy interrupt suddenly, the electronic component inside Switching Power Supply the phenomenon that there is also " hiccups ", the Switching Power Supply exists When input power turns off, there can be delay in 3~4 seconds, the Switching Power Supply can just stop exporting electric energy completely, pass through switch electricity The extraneous electronic component of source driving can continue to run 3~4 seconds after shutdown moment, and then the electricity for causing Switching Power Supply to be realized Required for road function and non-technical personnel, this " hiccup phenomenon " also can greatly damage the physics of electronic device in Switching Power Supply Safety damages, and causes Switching Power Supply entirely ineffective when serious；By taking the indicator light in this field in display panel as an example, passing In system technology, display panel generallys use the working condition that indicator light carrys out indicator light display panel, and technical staff is using switch electricity Source circuit is come the on/off that controls the display panel, if user needs to display panel and indicator light while shutting down, due to There is hiccup phenomenon in switching power circuit, indicator light, which can dodge 3-4 seconds, just closes, and user is shutdown, indicator light blue lamp to this requirement It immediately closes off；And traditional technology display panel synchronous can't be turned off with indicator light, Switching Power Supply is still exported in shutdown moment Voltage, indicator light are in abnormal luminous state, this usage experience that will lead to user reduces, and also result in the switch of display panel The power standby of power supply, which is lost, to be increased, and the application cost of switching power circuit increases.
Therefore, there is " hiccup " phenomenon in the switching power circuit in traditional technology, and switching power circuit cannot achieve synchronization Shutdown, causes switching power circuit not to be applicable in generally, and the control accuracy and stability of traditional switching power circuit are lower, It is difficult to blanket problem.
Summary of the invention
In view of this, the embodiment of the present application provides a kind of synchronization breaking circuit of Switching Power Supply, Switching Power Supply driving electricity The synchronization cut-off method of road and Switching Power Supply, it is intended to solve switching power circuit in illustrative technical solution and there is hiccup now As causing switching power circuit that can not synchronize shutdown, the control of switching power circuit according to the actual demand of technical staff The lower problem of performance.
The first aspect of the embodiment of the present application provides a kind of synchronization breaking circuit of Switching Power Supply, the synchronous shutdown electricity Road includes:
Acquisition module, the acquisition module are connect with the current supply circuit of the Switching Power Supply, and the acquisition module is to described The parameters of electric power of current supply circuit is acquired to obtain sampling parameter；
Switch module, the switch module are connect with the acquisition module, and the switch module is small in the sampling parameter Cut-off signals are then exported in the first parameter preset；And
Electric power driving module, the electric power driving module are connect with the switch module, and the electric power driving module is in institute Stating makes the current supply circuit of the Switching Power Supply stop transmission electric energy under the driving of cut-off signals.
In one of them embodiment, the acquisition module includes sampling branch and sampling resistor；
Wherein, the sampling branch includes multiple resistance being sequentially connected in series, and is opened described in the first termination of the sampling branch The energization input in powered-down source, the first end of the second termination sampling resistor of the sampling branch, the sampling resistor Second termination simulation ground；
The second end of the sampling branch and the first end of the sampling resistor connect the sampling to form the sampling module altogether Signal output end.
In one of them embodiment, the switch module includes: first diode, first resistor, second resistance, Three resistance, first capacitor, the second capacitor, first switch tube and second switch；
Wherein, the anode of the first diode connects the first DC power supply, the first end of the first resistor and described The first end of one capacitor is connected to the cathode of the first diode altogether, the second termination simulation ground of the first capacitor, and described the The second end of one resistance, the first end of second capacitor, the first end of the second resistance and the first switch tube Control terminal connects the sampled signal input to form the switch module altogether；
First conduction terminal of the first switch tube and the control terminal of the second switch are connected to the 3rd resistor altogether First end, the 3rd resistor second termination the second DC power supply；
First conduction terminal of the second switch is the signal output end of the switch module；
Second end, the second end of the second resistance, the second conduction terminal of the first switch tube of second capacitor And the second conduction terminal of the second switch is connected to simulation ground altogether；
The sampled signal input of the switch module connects the acquisition module, and the signal output end of the switch module connects The electric power driving module.
In one of them embodiment, the switch module further include: voltage-stabilizing device；
Wherein, the first termination acquisition module of the voltage-stabilizing device, the second termination of the voltage-stabilizing device described the The control terminal of one switching tube；
It is when the voltage of the voltage-stabilizing device first end is more than or equal to the conduction threshold of the voltage-stabilizing device, then described Voltage-stabilizing device conducting.
In one of them embodiment, the electric power driving module includes: switching power source chip and the 4th resistance；
Wherein, the control signal input tube foot of the switching power source chip and the first end of the 4th resistance connect to be formed altogether The signal input part of the electric power driving module, the second termination simulation ground of the 4th resistance, the electric power driving module Signal input part connects the switch module；
The power supply control pin of the switching power source chip connects the current supply circuit of the Switching Power Supply.
The second aspect of the embodiment of the present application provides a kind of switch power source driving circuit, comprising:
First filter module, accesses the first AC energy, and first filter module carries out first AC energy Filtering；
First rectification module, first rectification module connect first filter module, and first rectification module will be filtered The first AC energy rectification after wave is converted to the first direct current energy；
The synchronization breaking circuit of Switching Power Supply as described above, the synchronous breaking circuit connect first filter module Input terminal, the synchronous breaking circuit sample first AC energy to obtain the first sampling parameter, the synchronous pass Deenergizing then exports cut-off signals less than the first parameter preset in first sampling parameter, is greater than in first sampling parameter Or Continuity signal is then exported equal to first parameter preset；
Inverter module, the inverter module connect first rectification module and the synchronous breaking circuit, the inversion Module stops under the driving of the cut-off signals, works under the driving of the Continuity signal；It works in the inverter module When, inversion is carried out to first direct current energy and obtains high-frequency ac electric energy；
Conversion module, the conversion module connect the inverter module, the conversion module to the high-frequency ac electric energy into Row transformation obtains the second AC energy；
Second rectification module, second rectification module connect the conversion module, and second rectification module is to described Two AC energies are rectified to obtain the second direct current energy；And
Second filter module；Second filter module connects second rectification module, and second filter module is to institute It states after the second direct current energy is filtered and exports.
In one of them embodiment, the inverter module includes: the 5th resistance, the 6th resistance, the 7th resistance, the 8th Resistance, the 9th resistance, the tenth resistance, eleventh resistor, twelfth resistor, thirteenth resistor, the 14th resistance, the 15th electricity Resistance, the 16th resistance, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, the 7th capacitor, the 8th capacitor, the first inductance, Third switching tube, the second diode, third diode and the 4th diode；
Wherein, the first end of the third capacitor, the first end of the 5th resistance, the first end of the 4th capacitor, First end, the first end of the 8th resistance and the first end of the 9th resistance of 7th resistance connect altogether to be formed it is described The first voltage control terminal of inverter module, the first voltage control of the inverter module terminate first rectification module and described Conversion module；
Second termination simulation ground of the third capacitor；
Second end, the second end of the 7th resistance, the second end of the 8th resistance and the institute of 4th capacitor The second end for stating the 9th resistance is connected to the cathode of second diode altogether, and the anode of second diode and the third are opened The first conduction terminal for closing pipe connects the second voltage control terminal to form the inverter module, the second voltage control of the inverter module altogether System terminates the conversion module；
The first end of second termination the 6th resistance of the 5th resistance；It is the second end of 6th resistance, described The cathode of the first end of 6th capacitor, the first end of the 7th capacitor and the 4th diode connects to form the inversion altogether The first switch signal input part of module, the first switch signal input part of the inverter module connect the synchronous breaking circuit；
The first end of tenth resistance and the cathode of the third diode connect to form the second of the inverter module altogether Switch signal input end, the second switch signal input part of the inverter module connect the synchronous breaking circuit；
The first end of the first end of tenth resistance, the anode of the third diode and the eleventh resistor is total It is connected to the control terminal of the third switching tube；
The first end of the twelfth resistor and the first end of the 5th capacitor connect to form the of the inverter module altogether Three switch signal input ends, the third switch signal input end of the inverter module connect the synchronous breaking circuit；
The second end of the eleventh resistor, the second end of the twelfth resistor, the first end of the thirteenth resistor, The first end of 14th resistance and the first end of the 15th resistance are connected to the second of the third switching tube altogether and lead Go side, the second end of the second end of the thirteenth resistor, the second end of the 14th resistance and the 15th resistance It is connected to simulation ground altogether；
The anode of 4th diode connects the first end of the 16th resistance, the second termination of the 16th resistance The first end of first inductance；
First termination of the 8th capacitor is digitally；
The second end of first inductance, the second end of the 8th capacitor, the second end of the 6th capacitor, described The second end of seven capacitors and the second end of the 5th capacitor are connected to simulation ground altogether.
In one of them embodiment, conversion module includes the first transformer；
Wherein, the primary coil of first transformer connects the inverter module, the secondary coil of first transformer Connect second rectification module.
In one of them embodiment, first filter module connects alternating current, and first AC energy derives from city Electricity.
The third aspect of the embodiment of the present application provides a kind of synchronization cut-off method of Switching Power Supply, the synchronization shutdown side Method includes:
The parameters of electric power of the current supply circuit of the Switching Power Supply is sampled to obtain sampling parameter；
Judge difference between the sampling parameter and the first parameter preset；
If the sampling parameter is less than first parameter preset, shutdown instruction is issued；
The current supply circuit of the Switching Power Supply is turned off according to the shutdown instruction, so that the power supply of the Switching Power Supply is returned Road stops output electric energy.
The synchronization breaking circuit of above-mentioned Switching Power Supply is passed through by the parameters of electric power of the current supply circuit of pilot switch power supply Sampling parameter judges whether Switching Power Supply meets turn-off criterion；If the sampling parameter of current supply circuit less than the first parameter preset, Illustrate that the electric energy that the electric energy in current supply circuit is in under-voltage condition or current supply circuit is accessed is cut off, Switching Power Supply has been at this time Through meeting turn-off criterion；Then the current supply circuit of Switching Power Supply is set to stop output electric energy immediately by electric power driving module, to realize The effect that Switching Power Supply turns off in time；Therefore the synchronization breaking circuit in the embodiment of the present application can overcome the hiccup of Switching Power Supply Phenomenon, when needing to turn off the inputing power of Switching Power Supply, the current supply circuit of the Switching Power Supply is able to maintain synchronous shutdown, with It prevents Switching Power Supply to be in under-voltage operating status, has greatly ensured the physical security of each electronic component in Switching Power Supply, The control stability and accuracy of Switching Power Supply are improved, the usage experience of technical staff is more preferably；The Switching Power Supply can fit For in the electronic equipment of every field, the synchronization breaking circuit of the Switching Power Supply in the embodiment of the present application to have high compatibility Property and practical value.
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 of the synchronization breaking circuit for the Switching Power Supply that one embodiment of the application provides；
Fig. 2 is the electrical block diagram for the acquisition module that one embodiment of the application provides；
Fig. 3 is the electrical block diagram for the switch module that one embodiment of the application provides；
Fig. 4 is another electrical block diagram for the switch module that one embodiment of the application provides；
Fig. 5 is the electrical block diagram for the electric power driving module that one embodiment of the application provides；
Fig. 6 is the structural schematic diagram for the switch power source driving circuit that one embodiment of the application provides；
Fig. 7 is the electrical block diagram for the inverter module that one embodiment of the application provides；
Fig. 8 is the electrical block diagram for the first filter module that one embodiment of the application provides；
Fig. 9 is the circuit of conversion module, the second rectification module and the second filter module that one embodiment of the application provides Structural schematic diagram；
Figure 10 is the specific flow chart of the synchronization cut-off method for the Switching Power Supply that one embodiment of the application provides；
Figure 11 is the structural schematic diagram for the display panel 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, the structural schematic diagram of the synchronization breaking circuit 10 of Switching Power Supply provided by the embodiments of the present application, wherein The Switching Power Supply 20 can be realized the function of electric energy conversion, to drive corresponding electronic equipment to be in specified working condition；For Convenient for explanation, only the parts related to this embodiment are shown, details are as follows:
The synchronous breaking circuit 10 includes: acquisition module 101, switch module 102 and electric power driving module 103.Its In, the acquisition module 101 is connect with the current supply circuit of the Switching Power Supply 20, and the acquisition module 101 is powered back to described The parameters of electric power on road is acquired to obtain sampling parameter.
Optionally, the parameters of electric power are as follows: working voltage or running current；If the parameters of electric power is working voltage, Then the sampling parameter is sampled voltage；If the parameters of electric power is running current, the sampling parameter is sample rate current；Its Described in sampling parameter there are one-to-one relationships with the parameters of electric power.
Optionally, the current supply circuit includes firewire L and zero curve N, and the current supply circuit has power supply electric energy, when switch electricity Electric energy conversion of powering can be exported the electric energy of different amplitudes, by Switching Power Supply 20 to drive not by the access of source 20 power supply electric energy The electronic component of same type is in specified working condition；The switch can be accurately acquired by the acquisition module 101 Electric energy operating condition in power supply 20 can accurately obtain Switching Power Supply 20 according to the fluctuation situation of the parameters of electric power and input electricity Energy variable quantity, and then judge whether the Switching Power Supply 20 is in safe operation state；Therefore the present embodiment passes through acquisition mould Block 101 can monitor the electric energy operating condition of current supply circuit in real time, be conducive to improve the synchronous breaking circuit 10 for switch The control accuracy of power supply 20.
The switch module 102 is connect with the acquisition module 101, and the switch module 102 is small in the sampling parameter Cut-off signals are then exported in the first parameter preset.
It should be noted that first parameter preset is to be set in advance；Illustratively, when the parameters of electric power is operation When voltage, first parameter preset is 76V；When the parameters of electric power is running current, the first parameter preset 2A, skill Art personnel can set the specific value of the first parameter preset according to actual needs, to improve the control security of Switching Power Supply.
In the embodiment of the present application, the electric energy safe state that Switching Power Supply 20 can be obtained by the first parameter preset, when When the sampling parameter of current supply circuit is less than the first parameter preset, then illustrate the inputing power of Switching Power Supply 20 already below safety threshold Value, the current supply circuit of Switching Power Supply 20 are in under-voltage operating status, then switch module 102 is immediately generated cut-off signals, by this Cut-off signals can drive synchronous breaking circuit 10 to take corresponding shutdown safeguard measure to Switching Power Supply 20, to prevent switch electricity Source 20 is in under-voltage operating status for a long time；On the contrary, if the sampling parameter of current supply circuit is more than or equal to the first default ginseng Number then illustrates that the inputing power of Switching Power Supply 20 is in the range of safety, and switch module 102 does not generate cut-off signals, opens at this time Powered-down source 20 is in normal operating status；To which the switch module 102 can accurately be judged out according to sampling parameter Whether powered-down source 20 meets turn-off criterion, if Switching Power Supply 20 meets turn-off criterion, issues corresponding cut-off signals；If switch Power supply 20 does not meet turn-off criterion, then Switching Power Supply 20 is able to maintain that stable working condition；The switch module 102 being capable of spirit The electric energy abnormal conditions inside Switching Power Supply 20 are detected quickly, have ensured that the shutdown for the current supply circuit of Switching Power Supply 20 is rung Speed and accuracy are answered, the Switching Power Supply 20 has higher control security energy.
The electric power driving module 103 is connect with the switch module 102, and the electric power driving module 103 is in the pass The current supply circuit of the Switching Power Supply 20 is set to stop transmission electric energy under the driving of break signal.
Wherein, when the current supply circuit of Switching Power Supply 20 is in under-voltage condition, cut-off signals are transmitted to by switch module 102 Electric power driving module 103, wherein cut-off signals include shutdown instruction, can make Switching Power Supply 20 immediately by the cut-off signals Current supply circuit shutdown, so that Switching Power Supply 20 stops output electric energy, the electronic component connecting with Switching Power Supply 20 stops immediately Work realizes the effect of the synchronous shutdown of the current supply circuit of Switching Power Supply 20, to prevent Switching Power Supply 20 to be chronically at subnormal pressure Operating status；It can stop output electric energy by driving switch power supply 20 in time by the cut-off signals, ensure Switching Power Supply 20 Physical security；If switch module 102 can not export cut-off signals, the current supply circuit of Switching Power Supply 20 is in safe operation shape State can be ensured that electronic component is in safety, specified operation shape by the electric energy that the current supply circuit of Switching Power Supply 20 exports State, therefore the present embodiment can be realized by electric power driving module 103 and the current supply circuit of Switching Power Supply 20 carried out accurately Manipulation, the Switching Power Supply 20 can export corresponding electric energy according to the actual demand of technical staff, and technical staff's uses body It tests higher.
In synchronous breaking circuit 10 shown in fig. 1, the electric energy of current supply circuit can be acquired in real time by acquisition module 101 Operating condition, switch module 102 judge whether the inputing power of Switching Power Supply 20 is in under-voltage condition according to acquisition parameter；When The inputing power of the Switching Power Supply 20 is in under-voltage condition, then immediately turns off Switching Power Supply 20 by cut-off signals immediately, The current supply circuit of Switching Power Supply 20 stops working, and the synchronous shutdown effect of Switching Power Supply 20 is realized, to prevent Switching Power Supply 20 long Phase is in under-voltage operating status, and this under-voltage condition will will lead to relative electronic components and physical hazard, detraction electronics member occurs The service life of device；Therefore the synchronization breaking circuit 10 in the present embodiment can turn off in real time switch according to the actual demand of user The current supply circuit of power supply 20, to solve the hiccup phenomenon of Switching Power Supply 20, the control accuracy and corresponding speed of Switching Power Supply 20 Higher, the Switching Power Supply 20 can be suitable for each different industrial technical field to universality；Efficiently solve example Switching Power Supply, which needs to postpone certain time in input power shutdown moment, in property technology to stop working completely, Switching Power Supply Control accuracy and stability it is lower, the problem of being unable to satisfy technical staff's actual demand.
As an alternative embodiment, Fig. 2 shows the specific electricity of acquisition module 101 provided by the embodiments of the present application Line structure, as shown in Fig. 2, the acquisition module 101 includes sampling branch 1011 and sampling resistor RS；Wherein, the sampling branch Road 1011 includes multiple resistance being sequentially connected in series, and the power supply of the first termination Switching Power Supply 20 of the sampling branch 1011 is defeated Enter end, Switching Power Supply 20 passes through energization input access power supply electric energy；Described in second termination of the sampling branch 1011 The first end of sampling resistor RS, the second termination simulation ground AGND of the sampling resistor RS.
The second end of the sampling branch 101 and the first end of the sampling resistor RS connect to form the sampling module altogether 101 sampled signal output end；Wherein, the sampled signal output termination switch module 102 of sampling module 101, by sampling mould Sampling parameter is transmitted to switch module 102 by the sampled signal output end of block 101, to realize sampling module 101 and switch module Data interaction between 102.
Fig. 2 shows acquisition module 101 circuit structure in, by sample branch 1011 have access to Switching Power Supply 20 Power supply electric energy, with realize in Switching Power Supply 20 power electric energy accurate detection；Wherein resistance can be realized electric energy conversion Function, multiple resistance in sampling resistor RS and sampling branch 1011 in the present embodiment can play the role of partial pressure, lead to The intrinsic standoff ratio changed between sampling branch 1011 and sampling resistor RS is crossed, and then is exported by the sampled signal of sampling module 101 End can export different sampling parameters, and the sampling parameter includes sampled data；It can accurately be obtained by the sampled data It is accurate for the parameters of electric power of current supply circuit in Switching Power Supply 20 to realize to the power supply electric energy operating condition in Switching Power Supply 20 Sampling, improves the control precision of synchronous breaking circuit 10.
If the parameters of electric power is working voltage, sampling knot of the acquisition module 101 for electric energy of powering in current supply circuit Fruit can be indicated with following formula:
In above formula (1), the V1 is the sampled voltage of the sampled signal output end of sampling module 101, and the V2 is to open The working voltage of current supply circuit, the R in powered-down source 20SFor the resistance value of sampling resistor RS, the RD1…RDNRespectively sampling branch The resistance value of each resistance in road 1011；According to above formula (1), according to the sampling of the sampled signal output end of sampling module 101 electricity Pressure energy enough accurately obtains the working voltage amplitude of current supply circuit in Switching Power Supply 20, to realize the electric energy for Switching Power Supply 20 The accurate detection of operating condition.
Fig. 2 shows sampling module 101 particular circuit configurations, by adjusting sampling branch 1011 equivalent resistance and The amplitude of both the resistance of sampling resistor RS, to be that sampling module 101 can be for the accurate of different type Switching Power Supply 20 Sampling；And technical staff changes the particular circuit configurations of sampling branch 1011 according to actual needs, to realize for switch electricity The accurate detection of the parameters of electric power of the current supply circuit in source 20；Sampling module 101 has electricity more flexibly, compatible in the present embodiment Line structure, scalability is extremely strong, and the sampling parameter exported by sampling module 101 can accurately obtain the confession of Switching Power Supply 20 Whether electric energy is in abnormality, that is, has ensured the compatibility and practical value of synchronous breaking circuit 10, and improves switch The physical security and its control reliability of power supply 20.
As an alternative embodiment, Fig. 3 shows the specific electricity of switch module 102 provided by the embodiments of the present application Line structure, as shown in figure 3, the switch module 102 includes: first diode D1, first resistor R1, second resistance R2, third Resistance R3, first capacitor C1, the second capacitor C2, first switch tube M1 and second switch M2.
Wherein, the anode of the first diode D1 connects the first DC power supply VCC1, the first end of the first resistor R1 It is connected to the cathode of the first diode D1, the second termination of the first capacitor C1 altogether with the first end of the first capacitor C1 Simulation ground AGND, the second end of the first resistor R1, the first end of the second capacitor C2, the second resistance R2 first The control terminal of end and the first switch tube M1 connect the sampled signal input to form the switch module 102 altogether；Wherein lead to Cross the first direct current energy VCC1 can DC power output so that the sampled signal input of switch module 102 can be realized just Normal data communication facility.
The first conduction terminal of the first switch tube M1 and the control terminal of the second switch M2 are connected to the third altogether The first end of resistance R3, second the second DC power supply VCC2 of termination of the 3rd resistor R3, passes through the second DC power supply VCC2 Can DC power output, and then in first switch tube M1 shutdown, the control terminal of second switch M2 is high level；First opens When closing pipe M1 conducting, the control terminal of second switch M2 is low level, thus by the conducting of control first switch tube M1 or Turn off process can correspondingly change the on off operating mode of second switch M2.
The first conduction terminal of the second switch M2 is the signal output end of the switch module 102.
The second end of the second capacitor C2, the second end of the second resistance R2, the first switch tube M1 second Conduction terminal and the second conduction terminal of the second switch M2 are connected to simulation ground AGND altogether.
The sampled signal input of the switch module 102 connects the acquisition module 101, the letter of the switch module 102 Number output terminates the electric power driving module 103；Switch module 102 has access to sampling parameter by sampled signal input, And prevent sampling parameter loss of signal and distorted signals between different circuit modules；When the switch module 102 generates The signal output end of cut-off signals, switch module 102 exports cut-off signals to electric power driving module 103, is believed by the shutdown Number synchronous breaking circuit 10 can be driven to take shutdown measure to the current supply circuit of Switching Power Supply 20, to ensure Switching Power Supply 20 Physical security performance.
As an alternative embodiment, first switch tube M1 is metal-oxide-semiconductor or triode；Second switch M2 is Metal-oxide-semiconductor or triode；When first switch tube M1 and second switch M2 is in different conductings or off state, pass through The signal output end of switch module 102 has different level states, to adjust the working condition of synchronous breaking circuit 10.
Illustratively, the concrete operating principle of switch module 102 in Fig. 3 is illustrated below by specific example, if institute The parameters of electric power for stating current supply circuit is working voltage, then sampling module 101 exports sampled voltage to switch module 102, switch The course of work of module 102 is as follows:
The amplitude of power supply electric energy in Switching Power Supply 20, setting: the first switch tube can be obtained by sampled voltage Conducting voltage between the-the second conduction terminal of control terminal is the first parameter preset, when the control terminal voltage of the first switch tube is big When the first parameter preset, then the first switch tube M1 conducting；Conversely, when the control terminal electricity of first switch tube M1 When pressure is less than the first parameter preset, then the first switch tube M1 is disconnected；And in this example, first switch tube M1 and second Switching tube M2 is high drive.
If the power supply electric energy of Switching Power Supply 20 is in under-voltage condition, the sampled voltage that sampling module 101 exports is 5.1V, the One parameter preset is 6.1V, then sampled voltage is less than the conducting voltage of first switch tube M1, then first switch tube M1 is cut at this time Only, the second DC power supply VCC2 will draw high the control terminal voltage of second switch M2, and the control terminal of second switch M2 is in height Level state is directly connected between the first conduction terminal and the second conduction terminal of second switch M2, passes through second switch M2's First conduction terminal directly exports cut-off signals；Therefore lower sampled voltage will lead to first switch tube M1 cut-off, second switch Pipe M2 conducting, the first conduction terminal of second switch M2 are pulled low, and switch module 102 is returned according to the power supply of Switching Power Supply 20 at this time The undervoltage condition on road can export cut-off signals in real time, improve synchronous breaking circuit 10 and the power supply of Switching Power Supply 20 is returned The turn-off response speed of road under-voltage condition.
If the power supply electric energy of Switching Power Supply 20 is not in under-voltage condition, the power supply electric energy of Switching Power Supply 20 has normal width Value samples obtained sampled voltage by sampling module 101 and is also at normal amplitude, if the sampling that sampling module 101 exports Voltage is 8.1V, and the first parameter preset is 6.1V, voltage the leading greater than first switch tube M1 of the control terminal of first switch tube M1 Be powered pressure；It is connected when between the first conduction terminal and the second conduction terminal of first switch tube M1, then the control terminal of second switch M2 It is directly connect with simulation ground AGND by first switch tube M1, the voltage of the control terminal of second switch M2 is pulled low, and second opens Pipe M2 cut-off is closed, then the first conduction terminal of second switch M2 is high level, and the first conduction terminal of second switch M2 can not be defeated Cut-off signals out, current supply circuit is in normal electric energy transmission state in Switching Power Supply 20 at this time；Therefore the biggish sampling of amplitude Voltage can be such that first switch tube M1 is connected, second switch M2 cut-off, the level quilt of the first conduction terminal of second switch M2 It draws high, power interruptions measure can not be taken to the current supply circuit of Switching Power Supply 20 by synchronizing breaking circuit 10 at this time, ensure synchronization The control efficiency and control accuracy of breaking circuit 10.
In the particular circuit configurations of the switch module 102 shown in Fig. 3, according between sampling parameter and the first parameter preset Amplitude difference, to control the conducting or shutdown between first switch tube M1 and second switch M2；It is supplied when in Switching Power Supply 20 When there is biggish fluctuation in the parameters of electric power of electrical circuit, then the on off operating mode between first switch tube M1 and second switch M2 It can change, and then the signal output end of driving switch module 102 can export cut-off signals in real time, so that Switching Power Supply 20 It can stop working in time, ensure the physical security performance of Switching Power Supply 20；To switch module 102 in the embodiment of the present application With more simplified, flexible circuit structure, the manufacturing cost and application cost of synchronous breaking circuit 10 are reduced；Switch module Whether 102 can accurately judge that out Switching Power Supply 20 in under-voltage condition according to sampling parameter, and the resultant error of judgement is poor, Synchronous breaking circuit 10 can be driven to take shutdown measure, the switch module to Switching Power Supply 20 in real time by cut-off signals 102 control response speed with higher, the synchronous breaking circuit 10 have higher compatibility.
As an alternative embodiment, Fig. 4 shows the another kind of switch module 102 provided by the embodiments of the present application Particular circuit configurations, compared to the circuit structure of switch module 102 in Fig. 3；Switch module 102 in Fig. 4 further includes voltage-stablizer Part ZD.
Wherein, the first termination acquisition module 101 of the voltage-stabilizing device ZD, the second termination of the voltage-stabilizing device ZD The control terminal of the first switch tube M1；It is more than or equal to the voltage-stabilizing device in the voltage of the voltage-stabilizing device ZD first end When the conduction threshold of ZD, then the voltage-stabilizing device ZD conducting.
Optionally, the voltage-stabilizing device ZD is zener diode, and the cathode of zener diode connects acquisition module 101, pressure stabilizing The anode of diode connects the control terminal of first switch tube M1, and illustratively, the conduction threshold of the zener diode is 5.1V, that Only when the sampled voltage that the cathode of zener diode accesses is greater than 5.1V, zener diode is just connected；Therefore this implementation The circuit structure of switch module 102 has higher flexibility and scalability in example.
Referring to the specific embodiment of above-mentioned Fig. 3, in the particular circuit configurations of the switch module 102 shown in Fig. 4, if logical When first switch tube M1 can be connected in the sampled voltage that over-sampling module 101 exports, the sampled voltage that sampling module 101 exports is necessary The sum of both conducting voltages of conduction threshold and first switch tube M1 more than or equal to voltage-stabilizing device ZD, in the application reality It applies in example, the first parameter preset is the sum of both conduction threshold of voltage-stabilizing device ZD and the conducting voltage of first switch tube M1； Illustratively, the conduction threshold of voltage-stabilizing device ZD is 5.1V, the conducting voltage 1.8V of first switch tube M1, and the first parameter preset is 6.9V；If the sampled voltage that sampling module 101 exports is 6.1V, illustrate that the power supply electric energy of Switching Power Supply 201 is in under-voltage The signal output end of state, first switch tube M1 shutdown, second switch M2 conducting, switch module 102 exports cut-off signals, leads to Crossing cut-off signals can drive synchronous breaking circuit 10 to take electrical discontinuity measure to Switching Power Supply 20, improve Switching Power Supply 20 Control security energy；If the sampled voltage that sampling module 101 exports is 7.1V, illustrate the power supply electric energy of Switching Power Supply 20 In normal range (NR), the voltage of the control terminal of first switch tube M1 is greater than the conducting voltage of first switch tube M1, first switch tube M1 conducting, second switch M2 shutdown, the signal output end of switch module 102 can not export cut-off signals, synchronous breaking circuit 10 can't take Switching Power Supply 20 shutdown measure, and Switching Power Supply 20 is able to maintain that the working condition of stable safety；Therefore originally Switch module 102 in application embodiment can accurately judge whether the current supply circuit of Switching Power Supply 20 is located according to sampling parameter Electrical discontinuity measure is taken to the under-voltage condition of Switching Power Supply 20 in under-voltage condition, and in time, synchronous breaking circuit 10 has Higher control security energy.
Comparison diagram 3 and Fig. 4, the circuit structure expansion with higher of the synchronous breaking circuit 10, so that synchronous close Deenergizing 10 can the power supply electric energy for different types of Switching Power Supply 20 accurately sampled and detected, ensured synchronization The compatibility of breaking circuit 10 and applicable generality；The specific of the first parameter preset is set by the voltage-stabilizing device ZD in Fig. 4 Amplitude, the first parameter preset can adaptively be adjusted according to the concrete type of Switching Power Supply 20, according to the first parameter preset It can accurately identify whether Switching Power Supply 20 is in under-voltage condition, and realize for the under-voltage event in Switching Power Supply 20 It is handled in time, reduces synchronous breaking circuit 10 and the detection error of the under-voltage condition of Switching Power Supply 20 and judgement are missed Difference；Synchronous breaking circuit 10 has higher compatibility in the embodiment of the present application, can be universally applied to each different industry In field, practical value is higher.
As an alternative embodiment, Fig. 5 shows the tool of electric power driving module 103 provided by the embodiments of the present application Body circuit structure, as shown in figure 5, the electric power driving module 103 includes: switching power source chip U1 and the 4th resistance R4；Wherein, The first end of the control signal input tube foot RT and the 4th resistance R4 of the switching power source chip U1 connect to form the electricity altogether The signal input part of source drive module 103, the second termination simulation ground AGND of the 4th resistance R4, the electric power driving module 103 signal input part connects the switch module 102；The power supply control pin of the switching power source chip U1 connects the switch electricity The current supply circuit in source 20；Wherein, referring to Fig. 5, the power supply control pin of the switching power source chip U1 include: OUT, VCC and CS；Wherein the switching power source chip U1 in the present embodiment has Switching Power Supply on-off control function, when switching power source chip U1's Power supply controls pin and accesses cut-off signals, and switching power source chip U1 can receive and identify the instruction of the shutdown in cut-off signals, and And switching power source chip U1 is according to the current supply circuit of the cut-off signals cut-out switch power supply 20, so that Switching Power Supply 20 stops work Make；On the contrary, illustrating that the power supply electric energy in the Switching Power Supply 20 is in peace if switching power source chip U1 does not access cut-off signals Full range, switching power source chip U1 does not use electrical discontinuity measure to Switching Power Supply 20 at this time；To the embodiment of the present application By electric power driving module 103 can the power supply electric energy to Switching Power Supply 20 cut off in time, to realize Switching Power Supply 20 Synchronous turn-off function, avoids Switching Power Supply 20 from the phenomenon that time delayed turn-off occur.
As an alternative embodiment, the model of the switching power source chip U1 are as follows: OB2273；Those skilled in the art The chip that other models in this field also can be selected in member is applied in electric power driving module 103, to realize corresponding circuit function, Herein without limitation to this.
As an alternative embodiment, referring to Fig. 5, the electric power driving module 103 further include: the 9th capacitor C9 and Optocoupler Q1；Wherein, the first end of the 9th capacitor C9 and the first end of optocoupler Q1 are connected to switching power source chip U1's altogether Compensation pins COMP, the ground pipe of the second end of the 9th capacitor C9, the second end of optocoupler Q1 and switching power source chip U1 Foot is connected to simulation ground AGND altogether, the control error to switching power source chip U1 can be carried out in time by compensation pins COMP Compensation, so that switching power source chip U1 can be accurately controlled Switching Power Supply 20, it is real by switching power source chip U1 When cutting control is carried out to the Switching Power Supply 20 of under-voltage condition, improve the control security of electric power driving module 103；Therefore The circuit structure of electric power driving module 103 in the embodiment of the present application has stronger compatibility, can open according to different types of Powered-down source adjusts the circuit structure of the remote drive module 103 of Diao, and scalability is extremely strong, and synchronous breaking circuit 10 has higher compatibility Property.
Fig. 6 shows the structural representation of switch power source driving circuit 60 provided by the embodiments of the present application, referring to Fig. 6, opening Powered-down source driving circuit 60 includes: the synchronization of the first filter module 601, the first rectification module 602, Switching Power Supply as described above Breaking circuit 10, inverter module 603, conversion module 604, the second rectification module 605 and the second filter module 606.
Wherein, the first filter module 601 accesses the first AC energy AC1, and first filter module 601 is to described first AC energy AC1 is filtered.
It in the embodiment of the present application, being capable of the realization phase of driving switch power driving circuit 60 by the first AC energy AC1 The electric energy conversion function answered；Since the first AC energy AC1 of the first filter module 601 access has biggish noise, such as There are biggish harmonic components etc. by the first AC energy AC1, therefore can be in time to the by the first filter module 601 One AC energy AC1 is filtered, and eliminates the interference components in the first AC energy AC1, improves switch power source driving circuit 60 In electric energy conversion quality, the electric energy that exports has higher stability and quality after switch power source driving circuit 60 is converted, and protects The control performance of switch power source driving circuit 60 is hindered.
First rectification module 602 connects first filter module 601, after first rectification module 602 will filter The first AC energy rectification be converted to the first direct current energy.
Wherein the first rectification module 602 has the function of that exchange turns direct current, therefore the first rectification module 602 is for alternating current It is able to achieve frequency and phase transition function, to export the first direct current energy of high-precision and high stability, wherein described first is straight Galvanic electricity can have specific amplitude；First rectification module 602 electric energy conversion function with higher, passes through first direct current Electric energy helps to ensure that switch power source driving circuit 60 can rapidly realize electric energy conversion function.
The synchronous breaking circuit 10 connects the input terminal of first filter module 601, and the synchronous breaking circuit 10 is right The first AC energy AC is sampled to obtain the first sampling parameter, and the synchronous breaking circuit 10 is in the first sampling ginseng Number then exports cut-off signals less than the first parameter preset, is more than or equal to the described first default ginseng in first sampling parameter It is several, export Continuity signal.
Optionally, the synchronous breaking circuit 10 is sampled to obtain first to the virtual value of the first AC energy AC Sampling parameter；The synchronous breaking circuit 10 can accurately judge that the first AC energy AC is according to the first sampling parameter It is no to be in low-pressure state, and then generate cut-off signals perhaps Continuity signal makes the work or stopping of inverter module 602, it ensures The physical security of switch power source driving circuit 60.
It should be noted that synchronous breaking circuit 10 is the synchronization breaking circuit 10 of Switching Power Supply in Fig. 1 in the present embodiment It is corresponding, therefore the specific embodiment for closing synchronous breaking circuit 10 in this present embodiment can refer to the embodiment of Fig. 1 to Fig. 5, It will not be described in great detail herein.
The inverter module 603 connects first rectification module 602 and the synchronous breaking circuit 10, the inversion mould Block 603 stops under the driving of the cut-off signals, works under the driving of the Continuity signal；In the inverter module 603 When work, inversion is carried out to first direct current energy and obtains high-frequency ac electric energy.
The working condition that inverter module 603 can be changed by synchronous breaking circuit 10, so that switch power source driving circuit 60 can or can not export electric energy；When the inverter module 603 accesses cut-off signals, then illustrate the first AC energy AC1 is in under-voltage condition, by cut-off signals make 603 power loss of inverter module stop, with realize switch power source driving circuit 60 and When the effect that turns off；If the inverter module 603 accesses Continuity signal, it is under-voltage to illustrate that the first AC energy AC1 is not in State can drive inverter module 603 to realize normal circuit function by Continuity signal, and switch power source driving circuit 60 is still Stable electric energy can be exported；Wherein the inverter module 603 can be realized the function that direct current delivers stream, pass through inverter module 603 can export the high-frequency ac electric energy of different amplitudes and frequency, be transmitted with changing electric energy in switch power source driving circuit 60 Amplitude so that switch power source driving circuit 60 in the present embodiment has faster energy conversion efficiency, control stability is more By force.
The conversion module 604 connects the inverter module 603, the conversion module 604 to the high-frequency ac electric energy into Row transformation obtains the second AC energy.
Wherein the conversion module 604 can be realized the function of alternating current amplitude conversion, can by the conversion module 604 The amplitude for changing the second AC energy in time, so that the conversion module 604 can export voltage/electricity with different amplitudes Stream improves switch so that the electric energy that switch power source driving circuit 60 exports can meet the actual demand of technical staff in real time 60 compatibility of power driving circuit and the scope of application.
Second rectification module 605 connects the conversion module 604, and second rectification module 605 is handed over described second Galvanic electricity can be carried out rectification and obtain the second direct current energy.
Wherein second rectification module 60 can be realized the function of electric energy conversion, when the input terminal of the second rectification module 60 When accessing the second AC energy, the second rectification module 60 can retain the DC component in the second AC energy, the second rectification mould The output end of block 60 can export the second direct current energy with amplitude and specific, ensure the electric energy of switch power source driving circuit 10 Conversion accuracy.
Second filter module 606 connects second rectification module 605, and second filter module 606 is to described Two direct current energies export after being filtered.
After by being rectified, being filtered and being converted for electric energy, the second direct current of the second rectification module 605 output There are interference components, this interference components will seriously detract the control accuracy of switch power source driving circuit 60 for electric energy；Therefore After filtering by the second filter module 606, the interference informations such as the low frequency AC components in the second direct current energy can be eliminated, in turn Second direct current energy of the second rectification module 605 output has higher precision and stability, reduces the second direct current energy Error is controlled, and then switch power source driving circuit 10 can realize higher control accuracy, Switching Power Supply for electronic circuit The practical value of driving circuit 10 is higher.
In the switch power source driving circuit 60 shown in Fig. 6, modulus of conversion can be directly controlled by synchronous breaking circuit 10 The electric energy transition status of block 604, if the first AC energy AC that switch power source driving circuit 60 is accessed is in under-voltage condition, Conversion module 604 can be made to stop immediately by synchronous breaking circuit 10, switch power source driving circuit 60 can not export direct current Can, the timely turn-off function for switch power source driving circuit 60 is realized, switch power source driving circuit 60 is avoided and is turning off There is hiccup phenomenon in moment, can postpone the problem of certain time just stops output, Switching Power Supply driving electricity in the embodiment of the present application Road 60 has higher control accuracy and controllability；When the first AC energy AC1 is in stable state, switch Power driving circuit 60 can be filtered the first AC energy AC1, rectify and inverter operation, so that Switching Power Supply drives Circuit 60 can export the direct current energy of respective magnitudes, when the second direct current energy of the second filter module 606 output is with higher Precision, extraneous electronic component can be made to be in specified working condition by second direct current energy, to meet technology The actual demand of personnel；To the control precision with higher of switch power source driving circuit 60 in the embodiment of the present application and control peace Quan Xing can be turned off in real time according to the needs of technical staff, or the direct current energy of output respective magnitudes, can be widely applicable for not Same industrial technical field, compatibility are extremely strong；It efficiently solves switch power source driving circuit in example technique and there is hiccup Phenomenon can not be immediately turned off according to the actual demand of technical staff, and control precision is lower, and Switching Power Supply drives in example technique The direct current energy of circuit output there are biggish interference components, can not blanket problem.
As an alternative embodiment, Fig. 7 shows the specific electricity of inverter module 603 provided by the embodiments of the present application Line structure, referring to Fig. 7, the inverter module 603 includes: the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th electricity Hinder R8, the 9th resistance R9, the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13, the 14th Resistance R14, the 15th resistance R15, the 16th resistance R16, third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the first inductance L1, third switching tube M3, the second diode D2, third diode D3 with And the 4th diode D4.
Wherein, the first end of the third capacitor C3, the first end of the 5th resistance R5, the 4th capacitor C4 One end, the first end of the 7th resistance R7, the first end of the 8th resistance R8 and the first end of the 9th resistance R9 The first voltage control terminal to form the inverter module 603 is connect altogether, and the first voltage of the inverter module 603 controls described in termination First rectification module 602 and the conversion module 604；It can be changed in time by the first voltage control terminal of inverter module 603 Electric energy transmission state between first rectification module 602 and conversion module 604, illustratively, when by synchronizing breaking circuit 10 When detecting that the first AC energy is in under-voltage condition, then inverter module 603 accesses cut-off signals, so that 604 energy of conversion module Enough to stop access electric energy, switch power source driving circuit 60 can stop transmitting electric energy immediately, realize that conversion module 604 turns off in real time Effect.
The second termination simulation ground AGND of the third capacitor C3.
Second end, the second end of the 7th resistance R7, the second end of the 8th resistance R8 of the 4th capacitor C4 And the second end of the 9th resistance R9 is connected to the cathode of the second diode D2, the anode of the second diode D2 altogether Connect the second voltage control terminal to form the inverter module 603 altogether with the first conduction terminal of the third switching tube M3, it is described inverse The second voltage control for becoming module 603 terminates the conversion module 604；When conversion module 604 realizes the conversion of normal electric energy, The voltage magnitude conversion performance of conversion module 604 can be changed in real time by the second voltage control terminal of inverter module 603, it is described Conversion module 604 has high controllability energy.
The first end of the second termination the 6th resistance R6 of the 5th resistance R5；The second of the 6th resistance R6 The cathode at end, the first end of the 6th capacitor C6, the first end of the 7th capacitor C7 and the 4th diode D4 is total Connect the first switch signal input part to form the inverter module 603, the first switch signal input part of the inverter module 603 Connect the synchronous breaking circuit 10.
The cathode of the first end of the tenth resistance R10 and the third diode D3 connect to form the inverter module altogether 603 second switch signal input part, the second switch signal input part of the inverter module 603 connect the synchronous breaking circuit 10。
The first end of the tenth resistance R10, the anode of the third diode D3 and the eleventh resistor R11 First end is connected to the control terminal of the third switching tube M3 altogether.
The first end of the twelfth resistor R12 and the first end of the 5th capacitor C5 connect to form the inverter module altogether 603 third switch signal input end, the third switch signal input end of the inverter module 603 connect the synchronous breaking circuit 10。
The second end of the eleventh resistor R11, the second end of the twelfth resistor R12, the thirteenth resistor R13 First end, the first end of the 14th resistance R14 and the first end of the 15th resistance R15 be connected to the third altogether The second conduction terminal of switching tube M3, the second end of the thirteenth resistor R13, the second end of the 14th resistance R14 and The second end of the 15th resistance R15 is connected to simulation ground AGND altogether.
The anode of the 4th diode D4 connects the first end of the 16th resistance R16, the 16th resistance R16's The first end of second termination the first inductance L1.
The first of the 8th capacitor C8 terminates digitally PGND.
The second end of the first inductance L1, the second end of the 8th capacitor C8, the second end of the 6th capacitor C6, The second end of the 7th capacitor C7 and the second end of the 5th capacitor C5 are connected to simulation ground AGND altogether.
Optionally, the third switching tube M3 is metal-oxide-semiconductor or triode, is not limited this.
In the particular circuit configurations of the inverter module 603 shown in Fig. 7, the first switch signal of inverter module 603 is inputted End, second switch signal input part and third switch signal input end can realize that interaction is logical with synchronous breaking circuit 10 News sample the first AC energy AC1 that the first filter module accesses when synchronizing breaking circuit 10, and according to sampled result Judge whether the first AC energy AC1 is in under-voltage condition；Each switch signal input end access shutdown letter of inverter module 603 Number perhaps Continuity signal is to realize itself conducting or shutdown；Illustratively, when the second switch signal of inverter module 603 When input terminal accesses cut-off signals or Continuity signal, since cut-off signals and Continuity signal have different level states, because This can make third switching tube M3 be connected or turn off by cut-off signals and Continuity signal, then inverter module 603 is in corresponding Work or halted state；To the embodiment of the present application by change third switching tube M3 conducting or off state make it is inverse Become module 603 to stop or work, the inverter module 603 control response speed with higher, the accuracy of control is high； When the first AC energy AC is in under-voltage condition, inverter module 603 can be made to stop electric energy in time by cut-off signals inverse Become operation, switch power source driving circuit 10 realizes the effect of synchronous shutdown, and inverter module 603 can be according to the practical need of technical staff Electric energy inversion is carried out, the usage experience of user is stronger, improves the control performance of switch power source driving circuit 10.
As an alternative embodiment, Fig. 8 shows the first filter module 601 provided by the embodiments of the present application and The particular circuit configurations of one rectification module 602, referring to Fig. 8, the first filter module 601 includes: first switch F1, the tenth capacitor C10, the 17th resistance R17 and the second transformer T2.
Wherein, the first end of first switch F1 is that the electric energy of the first filter module 601 inputs positive terminal, first switch F1's The first end of second end, the first end of the tenth capacitor C10 and the 17th resistance R17 is connected to the primary line of the second transformer T2 altogether The first end of circle, the secondary wire of the second end of the tenth capacitor C10, the second end of the 17th resistance R17 and the second transformer T2 The first end of circle connects the electric energy input negative pole end to form the first filter module 601 altogether；Wherein, the electric energy of the first filter module 601 It inputs positive terminal and electric energy input negative pole end accesses the first AC energy AC, so that switch power source driving circuit 60 is with higher Electric energy compatibility；The second end of the secondary coil of the second end of the primary coil of second transformer T2 and the second transformer T2 is the The power output of the electric energy output end of one filter module 601, the first filter module 601 terminates the first rectification module 602, Jin Er One filter module 601 can export filtered first AC energy to the first rectification module 602.
Therefore in the present embodiment, the biography of the first AC energy can be controlled by the conducting or shutdown of first switch F1 Defeated process, only when first switch F1 is connected, switch power source driving circuit 10 can realize normal electric energy conversion function, The control flexibility of switch power source driving circuit 60 is greatly improved by first switch F1；Tenth capacitor C10 and second becomes Depressor T2 can play the role of eliminating interference components, filter out the outside noise in the first AC energy in time, so that second becomes Depressor T2, which exports filtered electric energy, has higher precision and stability；The first filter module 601 in the present embodiment has More simplified circuit structure can improve the quality of AC energy after filtering precisely in real time, so that Switching Power Supply driving electricity The electric energy conversion performance with higher of road 60, the switch power source driving circuit 60 have the higher scope of application.
As an alternative embodiment, as shown in figure 8, the first rectification module 602 is rectifier bridge, wherein the rectification Bridge includes 4 diodes being sequentially connected, and the electrical energy inputs of the rectifier bridge connect the first filter module 601, the rectifier bridge Power output termination inverter module 603 and synchronous breaking circuit 10, after the electrical energy inputs access of the rectifier bridge filters The first AC energy when, rectifier bridge utilizes the one-way conduction performance of each diode, and the electric energy output end of the rectifier bridge is defeated First direct current energy out, and the first direct current energy has stable amplitude, and the first direct current energy has lesser interference electric energy； The present embodiment realizes the function that exchange turns direct current by rectifier bridge, and the circuit structure of the first rectification module 602 has stronger Compatibility improves the electric energy conversion performance of switch power source driving circuit 10.
As an alternative embodiment, first filter module 601 connects alternating current, first AC energy source In alternating current.
Referring to Fig. 8, wherein alternating current includes that firewire L and zero curve N, the firewire L and zero curve N have a power supply electric energy, and first Filter module 601 has access to the electric energy in alternating current, and realizes the filter action for electric energy in alternating current, improves electricity in alternating current The precision of energy；To which switch power source driving circuit 60 can be realized the conversion for electric energy in alternating current, switch power source driving circuit 60 can be converted to alternating current electric energy specific direct current energy, drive corresponding electronic component to be in specified by the direct current energy Working condition；Switch power source driving circuit 60 in the embodiment of the present application has stronger reliability and compatibility, applicable It is stronger in the conversion performance of each industrial technical field, electric energy, associate power is improved by the switch power source driving circuit 60 Electric energy safe performance in system.
As an alternative embodiment, to show conversion module 604, second provided by the embodiments of the present application whole by Fig. 9 The particular circuit configurations of flow module 605 and the second filter module 606, referring to Fig. 9, conversion module 604 includes the first transformation Device T1；Wherein, the primary coil of the first transformer T1 connects the inverter module 603, the secondary of the first transformer T1 Coil connects second rectification module 605.
When the normally output high-frequency ac electric energy of the inverter module 603, the first transformer T1 using primary coil and time Turn ratio between grade coil, realizes the effect of boosting or decompression, and then the first transformer T1 can be realized accurate electric energy The function of conversion, the first transformer T1, which exports the second AC energy, has specific amplitude；Therefore conversion module 604 has more Compatible circuit structure facilitates the specific electricity for simplifying switch power source driving circuit 10 to change the amplitude of the second AC energy Line structure, switch power source driving circuit 10 can carry out electric energy conversion according to the actual demand of technical staff, and the scope of application is extremely wide.
As an alternative embodiment, as shown in figure 9, the second rectification module 605 includes: the 5th diode D5, 18 resistance R18 and the 11st capacitor C11；The anode of 5th diode D5 and the first end of the 18th resistance R18 are connected to altogether The 604, the 18th resistance R18 of conversion module second termination the 11st capacitor C11 first end, the cathode of the 5th diode D5 and The second end of 11st capacitor C11 is connected to the second filter module 606 altogether；In embodiment, the second rectification module 605 utilizes the tenth One capacitor C11 and the 5th diode D5 can be realized the effect of rectification, so that the second rectification module 605 can export the second direct current Electric energy, it is easy to operate, so that the second rectification module 605 in the present embodiment can be realized stable electric energy conversion function, retain DC component in second AC energy avoids occurring biggish electric energy loss in switch power source driving circuit 60.
As an alternative embodiment, as shown in figure 9, the second filter module 606 includes: the 12nd capacitor C12, 13 capacitor C13, the 14th capacitor C14, the 19th resistance R19, the 20th resistance R20, the 21st resistance R21, the 20th Two resistance R22, the 23rd resistance R23, the 6th diode D6, the first Light-emitting diode LED 1 and third transformer T3.
Wherein, the first end of the 19th resistance R19, the first end of the 13rd capacitor C13, the 14th capacitor C14 first The first end of the primary coil of end and third transformer T3 is connected to the second of the 605, the 13rd capacitor C13 of the second rectification module altogether The first end of the secondary coil at end, the second end of the 14th capacitor C14 and third transformer T3 is connected to digitally PGND altogether, the The first end of the primary coil of three transformer T3 and the first end of the 23rd resistance R23 connect to form the second filter module 606 altogether Power output end, the second termination digitally PGND of the secondary coil of third transformer T3；Wherein second filter module 606 Power output end connects electronic equipment, can export filtered second direct current by the power output end of the second filter module 606 Electric energy can make electronic equipment be in specified working condition by the second direct current energy.
The second end of 19th resistance R19 and the first end of the 20th resistance R20 are connected to the first Light-emitting diode LED 1 altogether Anode, the 21st resistance R21 first termination the 12nd capacitor C12 first end, the second end of the 20th resistance R20, The cathode of first Light-emitting diode LED 1, the second end of the 21st resistance R21, the second end of the 12nd capacitor C12, the 20th The second end of three resistance R23 and the first end of the 22nd resistance R22 are connected to the cathode of the 6th diode D6, the six or two pole altogether The plus earth of pipe D6.
In the embodiment of the present application, the 6th diode D6 can play the role of pressure stabilizing, when the second filter module 606 is to During two direct current energies are filtered, each electronics in the second filter module 606 can be ensured by the 6th diode D6 The physical security of component；The work of the second filter module 606 can be shown by the luminance of the first Light-emitting diode LED 1 Make state, illustratively, if the first Light-emitting diode LED 1 shines, illustrates that the second filter module 606 can be realized normally Electric energy filter action, switch power source driving circuit 60 can export corresponding DC voltage/direct current energy；If the first light-emitting diodes Pipe LED1 does not shine, then illustrates that the second filter module 606 cannot achieve electric energy filter action, the first AC energy is in under-voltage shape State, switch power source driving circuit 60 turn off, and switch power source driving circuit 60 can not normal DC power output；Therefore technical staff The electric energy of switch power source driving circuit 60 intuitively can be obtained by the luminous or OFF state of the first Light-emitting diode LED 1 Transmission state, technical staff have higher usage experience, and switch power source driving circuit 60 has higher physical security performance.
In the circuit structure of the second filter module 606 shown in Fig. 9, pass through the 13rd capacitor C13, the 14th capacitor C14 and third transformer T3 can eliminate the noise in the second direct current energy, and the manufacturing cost of circuit is lower, the second direct current energy In have more stable DC component, improve the control precision of switch power source driving circuit 60, avoid the second direct current energy In there are AC compounents to cause electronic component there are action error, reduce asking for the control performance of switch power source driving circuit 60 Topic；The switch power source driving circuit 60 can export specified direct current energy according to the actual needs of technical staff, ensured and opened The physical security of powered-down source driving circuit 60 and its associated electronic device, the switch power source driving circuit in the embodiment of the present application 60 have the wider array of scope of application, and compatibility is higher.
Figure 10 shows the detailed process of the synchronization cut-off method of Switching Power Supply provided in this embodiment, the Switching Power Supply Synchronization cut-off method controllable switch power supply can synchronize shutdown, improve Switching Power Supply output electric energy stability, switch The problem of control precision of power supply is higher, causes time delayed turn-off to avoid the hiccup phenomenon of Switching Power Supply；Referring to Fig. 10, described Synchronizing cut-off method includes:
S1001: the parameters of electric power of the current supply circuit of the Switching Power Supply is sampled to obtain sampling parameter.
The power supply electric energy operating condition in current supply circuit can be obtained in real time by the sampling parameter, and then is joined according to sampling The Switching Power Supply that number can accurately judge accesses the undulate quantity of power supply electric energy, realizes for electric energy abnormal in Switching Power Supply Dynamic monitors, and improves the control security energy of synchronous cut-off method.
S1002: judge difference between the sampling parameter and the first parameter preset；Switch electricity can be obtained by the difference Whether the power supply electric energy in source is in normal, stable range.
S1003: if the sampling parameter is less than first parameter preset, shutdown instruction is issued.
It is the secure threshold of power supply electric energy in Switching Power Supply by the first parameter preset, when sampling parameter is more than or equal to When the first parameter preset, then shutdown instruction is not issued, illustrates that the power supply electric energy in Switching Power Supply is in safe and stable fortune at this time Row state；Therefore in S1003, if obtaining the power supply electric energy in Switching Power Supply according to sampling parameter is in under-voltage condition, root According to shutdown instruction execution current supply circuit shutdown movement, under-voltage operation shape is chronically to avoid the electronic component in Switching Power Supply State, this under-voltage operating status will seriously damage electric energy safe in Switching Power Supply；Therefore the synchronous shutdown side in the present embodiment Method can make control response to the electric energy under-voltage condition in Switching Power Supply in time, and the control for improving synchronous cut-off method is rung Answer speed and control security.
S1004: turning off the current supply circuit of the Switching Power Supply according to the shutdown instruction, so that the Switching Power Supply Current supply circuit stops output electric energy；Wherein, the shutdown instruction turns off information comprising circuit, can be realized by shutdown instruction The synchronous shutdown effect of Switching Power Supply, improves the reliability and controllability of the electric energy of Switching Power Supply.
It should be noted that the Switching Power Supply in Figure 10 in the specific steps and Fig. 1 of the synchronization cut-off method of Switching Power Supply Synchronization breaking circuit 10 it is corresponding, therefore close the specific embodiment of the synchronization cut-off method of Switching Power Supply in this present embodiment The embodiment that can refer to Fig. 1 to Fig. 5, will not be described in great detail herein.
In the embodiment of the present application, the synchronous cut-off method can accurately sample the power supply electric energy in switch power supply, and Judge whether the electric energy in Switching Power Supply is in the operating status of stable safety according to sampled result；When the Switching Power Supply In power supply electric energy be in under-voltage condition, then issue shutdown instruction immediately, to realize the effect of the synchronous shutdown of Switching Power Supply, improve The control stability and reliability of synchronous cut-off method, avoid the Switching Power Supply from being chronically at under-voltage operation shape in the present embodiment State；To which the synchronization cut-off method in the present embodiment can turn off in time the electricity of Switching Power Supply according to the actual demand of technical staff Source transmission state ensures that Switching Power Supply can export more safe and stable direct current energy, and the synchronous cut-off method has more High control performance can be universally applied in the Switching Power Supply in each different industrial technical fields；It efficiently solves In example technique there is hiccup phenomenon in Switching Power Supply, and the control performance of Switching Power Supply is bad, the security performance of Switching Power Supply compared with Low problem.
Figure 11 shows the structural representation of display panel 110 provided in this embodiment, please refers to Figure 11, display panel 110 Synchronization breaking circuit 10 including Switching Power Supply as described above.
Referring to the embodiment of above-mentioned Fig. 1 to Fig. 5, the embodiment of the present application applies synchronous breaking circuit 10 in display panel In 110, it on the one hand can be realized by synchronous breaking circuit 10 and under-voltage protection carried out for Switching Power Supply, to prevent display panel Each electronic component in 110 is chronically at under-voltage operating status, and display panel 110 has higher control security energy； On the other hand shutdown can be synchronized to Switching Power Supply by synchronous breaking circuit 10, so that display panel can be according to user Be actually needed electric or power loss, and display panel control response speed with higher；Illustratively, display panel 110 can turn off according to the operational order moment of technical staff, and the control flexibility of display panel is stronger, the picture of display panel Corresponding image/video is shown under the manipulation of synchronous breaking circuit 10, user has more preferably visual experience, passes through the synchronization Breaking circuit 10 makes display panel 110 have higher practical value, and the scope of application is wider；Efficiently solve example technique There is hiccup phenomenon in the Switching Power Supply in middle display panel, there are delay time error, display surfaces for the power remove operation of display panel Controllability is not strong in plate, the bad problem of the usage experience of user.
In a particular application, the display panel 110 can be any type of display panel, such as based on TFT-LCD The liquid crystal of (Thin Film Transistor Liquid Crystal Display, Thin Film Transistor-LCD) technology Display panel, is based on the liquid crystal display panel based on LCD (Liquid Crystal Display, liquid crystal display device) technology The Organic Electricity laser display face of OLED (Organic Electroluminesence Display, Organic Electricity laser display) technology Plate, the quantum dot based on QLED (Quantum Dot Light Emitting Diodes, light emitting diode with quantum dots) technology are sent out Optical diode display panel or curved face display panel etc..
It should be noted that the structure of the display panel 110 shown in Figure 11 is only an embodiment, not constitute pair The technology limiting of the synchronization breaking circuit 10 of Switching Power Supply in the application, without prejudice to breaking circuit 10 synchronous in the application On the basis of substantial technological feature, synchronous breaking circuit 10 can be applied to each different types of work by those skilled in the art In industry product, such as unmanned plane, intelligent automobile；The synchronization breaking circuit 10 of Switching Power Supply in the application is applicable to this field In in the various industrial products with Switching Power Supply；Since this merely relates to the practical application of synchronous breaking circuit 10 in the application Object select, this still falls within the protection scope of synchronous breaking circuit 10 in the application.
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 (10)

1. a kind of synchronization breaking circuit of Switching Power Supply, which is characterized in that the synchronous breaking circuit includes:
Acquisition module, the acquisition module are connect with the current supply circuit of the Switching Power Supply, and the acquisition module is to the power supply The parameters of electric power in circuit is acquired to obtain sampling parameter；
Switch module, the switch module are connect with the acquisition module, and the switch module is in the sampling parameter less than One parameter preset then exports cut-off signals；And
Electric power driving module, the electric power driving module are connect with the switch module, and the electric power driving module is in the pass The current supply circuit of the Switching Power Supply is set to stop transmission electric energy under the driving of break signal.
2. synchronous breaking circuit according to claim 1, which is characterized in that the acquisition module includes sampling branch and adopts Sample resistance；
Wherein, the sampling branch includes multiple resistance being sequentially connected in series, the first termination of sampling branch switch electricity The energization input in source, the first end of the second termination sampling resistor of the sampling branch, the second of the sampling resistor Termination simulation ground；
The second end of the sampling branch and the first end of the sampling resistor connect the sampled signal to form the sampling module altogether Output end.
3. synchronous breaking circuit according to claim 1, which is characterized in that the switch module include: first diode, First resistor, second resistance, 3rd resistor, first capacitor, the second capacitor, first switch tube and second switch；
Wherein, the anode of the first diode connects the first DC power supply, the first end of the first resistor and first electricity The first end of appearance is connected to the cathode of the first diode, the second termination simulation ground of the first capacitor, first electricity altogether The control of the second end of resistance, the first end of second capacitor, the first end of the second resistance and the first switch tube End connects the sampled signal input to form the switch module altogether；
First conduction terminal of the first switch tube and the control terminal of the second switch are connected to the of the 3rd resistor altogether One end, second the second DC power supply of termination of the 3rd resistor；
First conduction terminal of the second switch is the signal output end of the switch module；
The second end of second capacitor, the second end of the second resistance, the second conduction terminal of the first switch tube and Second conduction terminal of the second switch is connected to simulation ground altogether；
The sampled signal input of the switch module connects the acquisition module, and the signal output end of the switch module connects described Electric power driving module.
4. synchronous breaking circuit according to claim 3, which is characterized in that the switch module further include: voltage-stabilizing device；
Wherein, the first termination acquisition module of the voltage-stabilizing device, the second termination described first of the voltage-stabilizing device are opened Close the control terminal of pipe；
When the voltage of the voltage-stabilizing device first end is more than or equal to the conduction threshold of the voltage-stabilizing device, then the pressure stabilizing Break-over of device.
5. synchronous breaking circuit according to claim 1, which is characterized in that the electric power driving module includes: switch electricity Source chip and the 4th resistance；
Wherein, the control signal input tube foot of the switching power source chip and the first end of the 4th resistance connect altogether to be formed it is described The signal input part of electric power driving module, the second termination simulation ground of the 4th resistance, the signal of the electric power driving module Input terminates the switch module；
The power supply control pin of the switching power source chip connects the current supply circuit of the Switching Power Supply.
6. a kind of switch power source driving circuit characterized by comprising
First filter module, accesses the first AC energy, and first filter module is filtered first AC energy；
First rectification module, first rectification module connects first filter module, after first rectification module will filter The first AC energy rectification be converted to the first direct current energy；
The synchronization breaking circuit of Switching Power Supply as described in any one in claim 1-5, the synchronous breaking circuit connect described The input terminal of one filter module, the synchronous breaking circuit sample first AC energy to obtain the first sampling ginseng Number, the synchronous breaking circuit then exports cut-off signals less than the first parameter preset in first sampling parameter, described the One sampling parameter is more than or equal to first parameter preset and then exports Continuity signal；
Inverter module, the inverter module connect first rectification module and the synchronous breaking circuit, the inverter module Stop under the driving of the cut-off signals, works under the driving of the Continuity signal；It is right in inverter module work First direct current energy carries out inversion and obtains high-frequency ac electric energy；
Conversion module, the conversion module connect the inverter module, and the conversion module can be carried out change to the high-frequency alternating current Pressure obtains the second AC energy；
Second rectification module, second rectification module connect the conversion module, and second rectification module is handed over described second Galvanic electricity can be carried out rectification and obtain the second direct current energy；And
Second filter module；Second filter module connects second rectification module, and second filter module is to described Two direct current energies export after being filtered.
7. switch power source driving circuit according to claim 6, which is characterized in that the inverter module includes: the 5th electricity Resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, eleventh resistor, twelfth resistor, the 13rd Resistance, the 14th resistance, the 15th resistance, the 16th resistance, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, Seven capacitors, the 8th capacitor, the first inductance, third switching tube, the second diode, third diode and the 4th diode；
Wherein, the first end of the third capacitor, first end of the 5th resistance, the first end of the 4th capacitor, described The first end of the first end of 7th resistance, the first end of the 8th resistance and the 9th resistance connects to form the inversion altogether The first voltage control of the first voltage control terminal of module, the inverter module terminates first rectification module and the conversion Module；
Second termination simulation ground of the third capacitor；
The second end of 4th capacitor, the second end of the 7th resistance, the second end of the 8th resistance and described The second end of nine resistance is connected to the cathode of second diode, the anode of second diode and the third switching tube altogether The first conduction terminal connect the second voltage control terminal to form the inverter module, the second voltage control terminal of the inverter module altogether Connect the conversion module；
The first end of second termination the 6th resistance of the 5th resistance；The second end of 6th resistance, the described 6th The cathode of the first end of capacitor, the first end of the 7th capacitor and the 4th diode connects to form the inverter module altogether First switch signal input part, the first switch signal input part of the inverter module connects the synchronous breaking circuit；
The first end of tenth resistance and the cathode of the third diode connect the second switch to form the inverter module altogether Signal input part, the second switch signal input part of the inverter module connect the synchronous breaking circuit；
First end, the anode of the third diode and the first end of the eleventh resistor of tenth resistance are connected to altogether The control terminal of the third switching tube；
The first end of the twelfth resistor and the first end of the 5th capacitor connect altogether to be formed the third of the inverter module and opens OFF signal input terminal, the third switch signal input end of the inverter module connect the synchronous breaking circuit；
It is the second end of the eleventh resistor, the second end of the twelfth resistor, the first end of the thirteenth resistor, described The first end of 14th resistance and the first end of the 15th resistance are connected to the second conduction terminal of the third switching tube altogether, The second end of the second end of the thirteenth resistor, the second end of the 14th resistance and the 15th resistance is connected to altogether Simulation ground；
The anode of 4th diode connects the first end of the 16th resistance, described in the second termination of the 16th resistance The first end of first inductance；
First termination of the 8th capacitor is digitally；
The second end of first inductance, the second end of the 8th capacitor, the second end of the 6th capacitor, the 7th electricity The second end of appearance and the second end of the 5th capacitor are connected to simulation ground altogether.
8. switch power source driving circuit according to claim 6, which is characterized in that conversion module includes the first transformer；
Wherein, the primary coil of first transformer connects the inverter module, and the secondary coil of first transformer meets institute State the second rectification module.
9. switch power source driving circuit according to claim 6, which is characterized in that first filter module connects alternating current, First AC energy derives from alternating current.
10. a kind of synchronization cut-off method of Switching Power Supply, which is characterized in that the synchronous cut-off method includes:
The parameters of electric power of the current supply circuit of the Switching Power Supply is sampled to obtain sampling parameter；
Judge difference between the sampling parameter and the first parameter preset；
If the sampling parameter is less than first parameter preset, shutdown instruction is issued；
The current supply circuit of the Switching Power Supply is turned off according to the shutdown instruction, so that the current supply circuit of the Switching Power Supply stops Only export electric energy.
CN201910040768.4A 2019-01-16 2019-01-16 Synchronization breaking circuit, driving circuit and the synchronous cut-off method of Switching Power Supply Pending CN109546847A (en)

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