CN105515372B - Multilevel voltage output switch power source converter and its pressure release control method and module - Google Patents
Multilevel voltage output switch power source converter and its pressure release control method and module Download PDFInfo
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- CN105515372B CN105515372B CN201610053491.5A CN201610053491A CN105515372B CN 105515372 B CN105515372 B CN 105515372B CN 201610053491 A CN201610053491 A CN 201610053491A CN 105515372 B CN105515372 B CN 105515372B
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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Abstract
Present invention discloses a kind of multilevel voltage output switch power source converter and its pressure release control methods and module, wherein pressure release control method are as follows: the voltage switch-over control signal delay process for sending voltage request mould, the switch controlled signal for controlling voltage change-over switch pipe ON/OFF is generated, to control the circuit structure of the sampling network module of the powered-down source converter；It is released according to voltage switch-over control signal generation and controls signal; and release switching tube and the PWM control module that signal is respectively sent to the switching power converters are controlled by releasing; with the output electricity of control switch supply convertor, and shielding PWM control module output over-voltage protection signal of false triggering due to feedback voltage instantaneously increases；Driving modulated signal resetting by receiving the generation of PWM control module, which is released, controls signal.Supply convertor using pressure release control of the invention reduces power consumption, improves stability, reliability and safety that switching power converters use.
Description
Technical field
The present invention relates to switching power converters fields, especially relate to a kind of multilevel voltage output switch power source change
Parallel operation and its pressure release control method and module.
Background technique
Switching power converters have the advantages that small in size, high-efficient and high current, are therefore widely used in mobile phone
In the portable electronic devices such as charger.In recent years, as portable electronic device battery capacity is continuously increased, to charging rate
More stringent requirements are proposed.In order to improve charging rate, industry proposes two kinds of implementation methods at present, first is that increasing charging electricity
Second stream is to improve charging voltage, wherein second method has become industry mainstream.
Charging voltage while the again purpose of backward compatible standard charge voltage (5V) are improved in order to realize, also there are two types of real
Existing method, first is that a dedicated interface chip is carried using regular tap supply convertor, second is that using interface core is incorporated
Piece function, the switching power converters for supporting multilevel voltage output.The present invention relates to multilevel voltage output switch power source converters.
Fig. 1 is the letter of the asynchronous rectified DC/DC switching power converters topology of voltage-dropping type of a support two-stage voltage output
Change schematic diagram.DC input voitage 411 is input to the port Vin of switch power controller 400, and PWM control module 401 controls function
The turn-on and turn-off of rate switching tube 404 persistently power to output by inductor winding 405 and freewheeling diode 406.First resistor
407, second resistance 408 and 3rd resistor 409 form sampling network, sample to output voltage, and by controlling to Switching Power Supply
The port FB of device 400, feedback arrive PWM control module 401, the conducting dutycycle of power switch tube 404 are converted to, thus to obtain steady
Fixed output voltage.
When switch power controller 400 works normally, the output signal Vo_up of voltage request module 402 under default setting
For low level, voltage change-over switch pipe 403 ends, and 409 branch of 3rd resistor disconnects at this time, and sampling network is only by first resistor
407 and second resistance 408 connect, output voltage be standard charge voltage (5V).When high voltage output request signal 412 is by opening
The port Vreq for closing power-supply controller of electric 400, is input to voltage request module 402, and output signal Vo_up becomes high level, electricity
Change-over switch pipe 403 is pressed to be connected, 409 branch of 3rd resistor is connected at this time, and resistance becomes second resistance 408 and the under sampling network
Three resistance 409 is in parallel, and than changing, output voltage rises for sampling, realizes high voltage output.
In practice, when power receiving equipment removes or voltage request signal becomes normal voltage output request, switch
Power-supply controller of electric output voltage needs to switch to low-voltage by high voltage.It is determined the time required to this process by output electric current, when defeated
When unloaded out, this process may be very long, if access when output voltage is not yet restored to normal voltage output another not simultaneous again
It is impaired then to easily cause power receiving equipment for the power receiving equipment for holding high voltage, so the work of resistance 410 is increased in order to accelerate conversion speed
For fictitious load, but due to when system works 410 branch of resistance it is constantly on, cause power loss.In addition, output voltage by
When high to Low conversion, since sampling network structure changes, feedback voltage is caused instantaneously to be elevated, this often triggers PWM control
Output over-voltage protection (OVP) mechanism for including in module 401 causes switch power controller 400 unnecessarily to enter protection mould
Formula, if but cancel output OVP mechanism, and the reliability and safety of converter can be reduced.
The problem of cannot suitably starting about fictitious load loss power and overvoltage protection mechanism is to need to solve the problems, such as.
Summary of the invention
The main object of the present invention be provide it is a kind of without fictitious load, and control overvoltage protection mechanism suitably start it is more
Step voltage output switch power source converter and its pressure release control method and module.
In order to achieve the above-mentioned object of the invention, this present invention proposes a kind of pressure release of multilevel voltage output switch power source converter
Control method, comprising:
The voltage switch-over control signal delay process that voltage request module is sent is generated for controlling voltage change-over switch
The switch controlled signal of pipe ON/OFF, to control the circuit structure of the sampling network module of the powered-down source converter；
It releases according to voltage switch-over control signal generation and controls signal, and will release and control signal and be respectively sent to institute
Release switching tube and the PWM control module of switching power converters are stated, with the output electricity of control switch supply convertor, and
Shield PWM control module overvoltage protection signal of false triggering due to feedback voltage instantaneously increases；
Driving modulated signal resetting by receiving the generation of PWM control module, which is released, controls signal.
Further, the step of voltage switch-over control signal delay process that voltage request module is sent, comprising:
By being delayed, buffer handles voltage switch-over control signal through line delay.
It is further, described that the step of controlling signal of releasing is generated according to the voltage switch-over control signal, comprising:
The voltage switch-over control signal is generated into positive pulse signal by monopulse generator；
Positive pulse signal is converted into releasing by rest-set flip-flop and controls signal.
Further, the driving modulated signal resetting by receiving the generation of PWM control module, which is released, controls signal
Step, comprising:
By the first phase inverter to the driving modulated signal of PWM control module be sent to after reverse phase processing three inputs with
Door；
Will the positive pulse signal reverse phase processing after be sent to three inputs and door, to reverse phase processing driving modulated signal into
Horizontal blanking；
By three inputs and door receive described in release and control signal, to control the on and off of three input and door, when three defeated
Enter when being opened with door, the driving modulated signal of three inputs and the processing of goalkeeper's reverse phase is sent to the rest-set flip-flop resetting and releases control
Signal.
The present invention also provides a kind of pressure control modules of multilevel voltage output switch power source converter, including delay electricity
Road, leadage circuit and reset circuit；
The delay circuit receives the switch-over control signal of voltage request module, and by switch-over control signal delay process at
The switch controlled signal of voltage change-over switch pipe ON/OFF is controlled, to control the sampling network module of the powered-down source converter
Circuit structure；
The leadage circuit receives switch-over control signal, is released according to switch-over control signal generation and controls signal, and will let out
Release switching tube and PWM control module that control signal is respectively sent to the switching power converters are put, with control switch electricity
The output electricity of source converter, and shielding PWM control module overvoltage protection of false triggering due to feedback voltage instantaneously increases are believed
Number；
The reset circuit receives the driving modulated signal that PWM control module generates, and according to the driving modulated signal weight
It sets described release and controls signal.
Further, the delay circuit includes delay buffer,
The input terminal of the delay buffer connects the voltage request module, and output end connects the voltage change-over switch
Pipe.
Further, the leadage circuit includes monopulse generator and rest-set flip-flop；
The switch-over control signal of the reception voltage request module of the monopulse generator, and by switch-over control signal
It is converted into positive pulse signal；
The rest-set flip-flop positive pulse signal is converted into releasing control signal be sent to it is described release switching tube and
PWM control module.
Further, the reset circuit includes that three inputs are triggered with door, the first phase inverter, the second phase inverter and the RS
Device；
First phase inverter receives the driving modulated signal of the PWM control module, and after carrying out reverse phase processing to it
It is sent to three inputs and door；
Second phase inverter receives the positive pulse signal that the monopulse generator generates, and is carried out reverse phase processing
After be sent to three inputs and door, to reverse phase processing driving modulated signal carry out blanking；
Three input and door release described in receiving and control signal, to control the on and off of three input and door, when three defeated
Enter when being opened with door, the driving modulated signal of three inputs and the processing of goalkeeper's reverse phase is sent to the rest-set flip-flop resetting and releases control
Signal.
The present invention also provides a kind of multilevel voltage output switch power source converters, including voltage request module, control of releasing
Module, voltage change-over switch pipe, sampling network module, switching tube of releasing, PWM control module and power switch tube；
The voltage request module receives external voltage request signal, and the voltage request signal is converted to voltage switching
Control signal is sent to the control module of releasing；
The voltage switch-over control signal described in control module delay process of releasing, and generate the transmission of switch controlled signal
To the voltage change-over switch pipe, to control the circuit structure of sampling network module；And according to the voltage switch-over control signal
Generation, which is released, controls signal, and will release and control signal and be respectively sent to release switching tube and PWM control module, is released with control
The working condition of switching tube, and shielding PWM control module overvoltage protection signal of false triggering due to feedback voltage instantaneously increases；
The feedback voltage that the PWM control module receives the sampling network module generates corresponding driving modulated signal,
Control the working condition of the power switch tube；And driving modulated signal is sent to the control module of releasing, make control of releasing
Molding block carries out resetting to release controlling signal.
Further, the pressure control module includes delay circuit, leadage circuit and reset circuit；
The delay circuit receives the switch-over control signal of voltage request module, and by switch-over control signal delay process at
The switch controlled signal of voltage change-over switch pipe ON/OFF is controlled, to control the sampling network module of the powered-down source converter
Circuit structure；
The leadage circuit receives switch-over control signal, is released according to switch-over control signal generation and controls signal, and will let out
Release switching tube and PWM control module that control signal is respectively sent to the switching power converters are put, with control switch electricity
The output electricity of source converter, and shielding PWM control module output overvoltage of false triggering due to feedback voltage instantaneously increases are protected
Protect signal；
The reset circuit receives the driving modulated signal that PWM control module generates, and according to the driving modulated signal weight
It sets described release and controls signal.
Further, the delay circuit includes delay buffer,
The input terminal of the delay buffer connects the voltage request module, and output end connects the voltage change-over switch
Pipe.
Further, the leadage circuit includes monopulse generator and rest-set flip-flop；
The switch-over control signal of the reception voltage request module of the monopulse generator, and by switch-over control signal
It is converted into positive pulse signal；
The rest-set flip-flop positive pulse signal is converted into releasing control signal be sent to it is described release switching tube and
PWM control module.
Further, the reset circuit includes that three inputs are triggered with door, the first phase inverter, the second phase inverter and the RS
Device；
First phase inverter receives the driving modulated signal of the PWM control module, and after carrying out reverse phase processing to it
It is sent to three inputs and door；
Second phase inverter receives the positive pulse signal that the monopulse generator generates, and is carried out reverse phase processing
After be sent to three inputs and door, to reverse phase processing driving modulated signal carry out blanking；
Three input and door release described in receiving and control signal, to control the on and off of three input and door, when three defeated
Enter when being opened with door, the driving modulated signal of three inputs and the processing of goalkeeper's reverse phase is sent to the rest-set flip-flop resetting and releases control
Signal.
Multilevel voltage output switch power source converter and its pressure release control method of the invention and module, it is defeated in multilevel voltage
Control module of releasing is incorporated in switching power converters out, the loss of power is saved in fictitious load that no setting is required, promotes output electricity
Press the speed of conversion without the efficiency of damage power supply, and can be compatible with existing output over-voltage protection mechanism；Meanwhile it releasing
Circuit is self adaptive control, releases the time without default, has very high adaptability and flexibility.
Detailed description of the invention
Fig. 1 is the circuit diagram of the multilevel voltage output switch power source converter of the prior art；
Fig. 2 is the process of the control method of releasing of the multilevel voltage output switch power source converter of one embodiment of the invention
Figure；
Fig. 3 is the circuit diagram of the control module of releasing of one embodiment of the invention；
Fig. 4 is the waveform diagram of each signal in the multilevel voltage output switch power source converter of one embodiment of the invention；
Fig. 5 is the structural frames of the control module of releasing of the multilevel voltage output switch power source converter of one embodiment of the invention
Figure；
Fig. 6 is the circuit diagram of the multilevel voltage output switch power source converter of one embodiment of the invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Referring to Fig. 2, the embodiment of the present invention provides a kind of pressure release control method of multilevel voltage output switch power source converter,
Comprising steps of
S1, the voltage switch-over control signal delay process for sending voltage request module are generated for controlling voltage conversion
The switch controlled signal of switching tube ON/OFF, to control the circuit structure of the sampling network module of the switching power converters；
S2, it releases according to voltage switch-over control signal generation and controls signal, and will release and control signal and send respectively
To release switching tube and the PWM control module of the switching power converters, with the output electricity of control switch supply convertor,
And shielding PWM control module overvoltage protection signal of false triggering due to feedback voltage instantaneously increases；
S3, the driving modulated signal resetting generated by reception PWM control module release and control signal.
As described in above-mentioned steps S1, S2 and S3, voltage request signal is converted into voltage switching control by voltage request module
Signal, by being delayed, buffer obtains switch controlled signal to its delay process, and the switch controlled signal and voltage switch
Control signal is identical, and the time only sent out is delayed, and is high level signal；In delay process voltage switch-over control signal
When, it is released according to the generation of voltage switch-over control signal and controls signal, be respectively sent to releasing for the switching power converters
Switching tube and PWM control module, above-mentioned release control signal and become high electricity in the high level decline of voltage switch-over control signal
It is flat, at this point, the voltage output for switch controlled switching power converters of releasing is released, the overvoltage protection letter in PWM control module
It number is released and to control signal shielding, open voltage conversion when voltage switch-over control signal generates and sends voltage change-over switch pipe
Pipe conducting is closed, the circuit structure of sampling network module changes, so as to cause the voltage in PWM control module to increase,
At this time since overvoltage protection signal is shielded, so overvoltage protection mechanism will not be triggered.Then PWM control module starts to generate
Modulated signal control power switch tube work is driven, while first driving control signal that PWM control module generates will be reset
It releases and controls signal, make switching tube shutdown of releasing, stop releasing, be simultaneously stopped the shielding to overvoltage protection signal, make PWM control
The output over-voltage protection mechanism of module restores normal.
It is above-mentioned that the step of controlling signal of releasing is generated according to the voltage switch-over control signal in the present embodiment, comprising:
S21, the voltage switch-over control signal is generated by positive pulse signal by monopulse generator；
S22, being converted into releasing by positive pulse signal by rest-set flip-flop controls signal.
As described in above-mentioned steps S21 and S22, when the level rising edge and the high and low electricity of holding of voltage switch-over control signal
Usually, above-mentioned monopulse generator output remains low level；After the arrival of voltage switch-over control signal failing edge, on
State the positive pulse signal V that monopulse generator exports a fixed durationO_DWN, then output returns to low level, positive pulse signal
VO_DWNThe S input terminal that single direct impulse is input to rest-set flip-flop is generated, releasing for its Q output output is made to control signal
Dischr becomes high level.
In the present embodiment, releases above by the driving modulated signal resetting for receiving the generation of PWM control module and control signal
The step of, comprising:
S31, the driving modulated signal of PWM control module is carried out being sent to three after reverse phase processing by the first phase inverter it is defeated
Enter and door；
S32, it will be sent to three inputs and door after positive pulse signal reverse phase processing, letter is modulated to the driving of reverse phase processing
Number carry out blanking；
S33, signal is controlled by releasing described in three inputs and door reception, to control the on and off of three input and door, when
When three inputs are opened with door, three inputs are sent to the rest-set flip-flop resetting with the driving modulated signal that goalkeeper's reverse phase is handled and release
Control signal.
As described in above-mentioned steps S31, S32 and S33, three input with door receive respectively reverse phase processing driving modulated signal and
The positive pulse signal V of reverse phase processingO_DWN, the positive pulse signal V of reverse phase processingO_DWNTo reverse phase processing driving modulated signal into
Horizontal blanking processing, when release control signal Dischr and become high level when, three inputs unlock with door and are connected, when PWM control
When the driving modulated signal Drv that molding block issues is low level, three inputs export high level signal, the high level signal weight with door
Rest-set flip-flop is set, so that its Q output signal is released and controls signal Dischr and become low level, switching power converters is made to terminate to let out
Let off journey.
Referring to Fig. 3, in one embodiment, above-mentioned control module 201 of releasing specifically includes rest-set flip-flop 301, second
Phase inverter 302, the input of the first phase inverter 306, three and door 303, delay buffer 304, monopulse generator 305；Outside first
Input terminal 311, the second external input terminals 312, the first outside output end 313 and the second outside output end 314；The delay buffering
The input terminal of device 304 connects the voltage request module 102 by first external input terminals 311, and output end passes through described
First outside output end 313 connects the voltage change-over switch pipe 103；The input terminal of the monopulse generator 305 passes through institute
It states the first external input terminals 311 and connects the voltage request module 102, output end is separately connected the input of the second phase inverter 302
The S input terminal at end and rest-set flip-flop 301；Three input connect second phase inverter 302 with the first input end of door 303
Output end, the second input terminal connect the output end of first phase inverter 306, and the input terminal of the first phase inverter 306 passes through second
Input terminal connects the output end of the PWM control module 101, and third input terminal connects the Q output of the rest-set flip-flop 301；
Output end connects the R input of the rest-set flip-flop 301；The Q output of the rest-set flip-flop 301 is defeated by second outside
Outlet 314 connects release switching tube 202 and the PWM control module 101.The control module 201 of releasing of the present embodiment, structure letter
It is single, it is low in cost, its circuit also can be used in other embodiments, release requirement as long as can be realized control.It is above-mentioned
The realization of RC charge and discharge electric line can be used in monopulse generator 305, and the realization of digital circuit counter can also be used.
Referring to Fig. 4 and Fig. 6, in the present embodiment, when the switching power converters 100 work, above-mentioned delay buffer
304 receive voltage switch-over control signal V by the first external input terminals 311O_SW, switch controlled is obtained after buffering delay
Signal VO_UP, and exported through the first outside output end 313；The received voltage switch-over control signal of module occurs for the pulse
VO_SWWhen rising edge and the high and low level of holding, output remains low level；And if only if voltage switch-over control signal VO_SW
After failing edge arrives, the direct impulse signal of a fixed duration is exported, then output returns to low level；When the voltage switches
Control signal VO_SWFailing edge when arriving, direct impulse signal generates single direct impulse and is input to the rest-set flip-flop
301301 S input terminal, releasing of making that its Q output exports control signal Dischr and become high level；Meanwhile single positive arteries and veins
Signal is rushed after 302 reverse phase of the second phase inverter, as lead-edge-blanking signal, in state switching to the driving modulated signal
Drv carries out blanking；Described release controls after signal Dischr becomes high level, and three inputs unlock with door 303, described in waiting
Drive modulated signal Drv, when driving modulated signal Drv first switching signal arrive, it is noted that driving modulated signal Drv be
Low level is effective, and three inputs become high level with the output of door 303, which resets rest-set flip-flop 301, exports its Q output
Release and control signal Dischr and become low level, terminate to release.
The control method of releasing of the multilevel voltage output switch power source converter of the embodiment of the present invention, by controlling vent discharge
Pressure, so switching power converters it is not necessary that fictitious load is added in sampling network module, greatly reduce the waste of the energy；Can also
Transmission, which is released, controls signal Dischr to PWM control module, misses to shield PWM control module because feedback voltage instantaneously increases
The output over-voltage protection signal of triggering, it can make overvoltage protection mechanism when the circuit structure of sampling network module changes
Caused voltage does not start when being elevated, and only starts when other overtensions, improves powered-down source converter and uses
Stability, reliability and safety.
Referring to Fig. 5, the embodiment of the present invention also provides a kind of pressure release control mould of multilevel voltage output switch power source converter
Block, including delay circuit 10, leadage circuit 20 and leadage circuit 30；
Above-mentioned delay circuit 10 receives the switch-over control signal of voltage request module, and by switch-over control signal delay process
At the switch controlled signal of control voltage change-over switch pipe ON/OFF, to control the sampling network mould of the powered-down source converter
The circuit structure of block；
Above-mentioned leadage circuit 20 receives switch-over control signal, is released according to switch-over control signal generation and controls signal, and will
It releases and controls release switching tube and PWM control module that signal is respectively sent to the switching power converters, with control switch
The output electricity of supply convertor, and shielding PWM control module overvoltage protection of false triggering due to feedback voltage instantaneously increases
Signal；
Above-mentioned leadage circuit 30 receives the driving modulated signal that PWM control module generates, and according to the driving modulated signal
It releases described in resetting and controls signal.
In the present embodiment, voltage request signal is converted into voltage switch-over control signal by voltage request module, passes through delay
The delay buffer of circuit 10 obtains switch controlled signal to its delay process, and the switch controlled signal and voltage switching are controlled
Signal processed is identical, and the time only sent out is delayed, and is high level signal；Delay process voltage switch-over control signal when
It waits, leadage circuit releases according to the generation of voltage switch-over control signal and controls signal, is respectively sent to the switching power converters
Release switching tube and PWM control module, above-mentioned release control signal and become high in the failing edge of voltage switch-over control signal
Level, at this point, the voltage output for switch controlled switching power converters of releasing is released, the overvoltage protection in PWM control module
Signal, which is released, controls signal shielding, converts voltage when voltage switch-over control signal generates and sends voltage change-over switch pipe
Switching tube shutdown, the circuit structure of sampling network module changes, so as to cause the voltage liter in PWM control module
Height, at this time since overvoltage protection signal is shielded, so overvoltage protection mechanism will not be triggered.Then PWM control module starts
Generate driving modulated signal control power switch tube work, while first driving control signal hair that PWM control module generates
It send to leadage circuit 30, leadage circuit 30, which releases resetting, controls signal, makes switching tube shutdown of releasing, stops releasing, stop simultaneously
Only to the shielding of overvoltage protection signal, the output over-voltage protection mechanism of PWM control module is made to restore normal.
In the present embodiment, above-mentioned leadage circuit 20 includes monopulse generator 305 and rest-set flip-flop 301；Pulse occurs
The switch-over control signal of the reception voltage request module of device 305, and switch-over control signal is converted into positive pulse signal；RS
The positive pulse signal is converted into releasing by trigger 301 to be controlled signal and is sent to switching tube and the PWM control module of releasing.
When the level rising edge of voltage switch-over control signal and the high and low level of holding, the above-mentioned output of monopulse generator 305 is kept
For low level；After the arrival of voltage switch-over control signal failing edge, above-mentioned monopulse generator 305 exports a fixation
The positive pulse signal V of durationO_DWN, then output returns to low level, positive pulse signal VO_DWNSingle direct impulse is generated to be input to
The S input terminal of rest-set flip-flop 301, releasing of making that its Q output exports control signal Dischr and become high level.
In the present embodiment, above-mentioned leadage circuit 30 includes three inputs and door 303, the first phase inverter 306, the second phase inverter
302 and the rest-set flip-flop 301；
First phase inverter 306 receives the driving modulated signal of the PWM control module, and carries out reverse phase processing to it
After be sent to three inputs and door 303；Second phase inverter 302 receives the positive pulse letter that the monopulse generator 305 generates
Number, and three inputs and door 303 are sent to after being carried out reverse phase processing, blanking is carried out to the driving modulated signal of reverse phase processing；
Three input receives described release with door 303 and controls signal, to control the on and off of three input and door 303, when three inputs
When opening with door 303, the driving modulated signal that reverse phase is handled is sent to the rest-set flip-flop 301 with door 303 and reset by three inputs
It releases and controls signal.In the present embodiment, three inputs receive the driving modulated signal of reverse phase processing respectively with door 303 and reverse phase is handled
Positive pulse signal VO_DWN, the positive pulse signal V of reverse phase processingO_DWNThe driving modulated signal of reverse phase processing is carried out at blanking
Reason, when release control signal Dischr and become high level when, three inputs unlock with door 303 and are connected, when PWM control module
When the 101 driving modulated signal Drv issued are low level, three inputs export high level signal, the high level signal weight with door 303
Rest-set flip-flop 301 is set, so that its Q output signal is released and controls signal Dischr and become low level, make switching power converters knot
Beam is released process.
Referring to Fig. 3, in one embodiment, above-mentioned control module 201 of releasing specifically includes rest-set flip-flop 301, second
Phase inverter 302, the input of the first phase inverter 306, three and door 303, delay buffer 304, monopulse generator 305；Outside first
Input terminal 311, the second external input terminals 312, the first outside output end 313 and the second outside output end 314；The delay buffering
The input terminal of device 304 connects the voltage request module 102 by first external input terminals 311, and output end passes through described
First outside output end 313 connects the voltage change-over switch pipe 103；The input terminal of the monopulse generator 305 passes through institute
It states the first external input terminals 311 and connects the voltage request module 102, output end is separately connected the input of the second phase inverter 302
The S input terminal at end and rest-set flip-flop 301；Three input connect second phase inverter 302 with the first input end of door 303
Output end, the second input terminal connect the output end of first phase inverter 306, and the input terminal of the first phase inverter 306 passes through second
Input terminal connects the output end of the PWM control module 101, and third input terminal connects the Q output of the rest-set flip-flop 301；
Output end connects the R input of the rest-set flip-flop 301；The Q output of the rest-set flip-flop 301 is defeated by second outside
Outlet 314 connects release switching tube and the PWM control module.The control module of releasing of the present embodiment, structure is simple, at low cost
It is honest and clean, its circuit also can be used in other embodiments, release requirement as long as can be realized control.Above-mentioned pulse occurs
The realization of RC charge and discharge electric line can be used in device 305, and the realization of digital circuit counter can also be used.
Referring to Fig. 4 and Fig. 6, in the present embodiment, when the switching power converters 100 work, above-mentioned delay buffer
304 receive voltage switch-over control signal V by the first external input terminals 311O_SW, switch controlled is obtained after buffering delay
Signal VO_UP, and exported through the first outside output end 313；The received voltage switch-over control signal of module occurs for the pulse
VO_SWWhen rising edge and the high and low level of holding, output remains low level；And if only if voltage switch-over control signal VO_SW
After failing edge arrives, the direct impulse signal of a fixed duration is exported, then output returns to low level；When the voltage switches
Control signal VO_SWFailing edge when arriving, direct impulse signal generates single direct impulse and is input to the rest-set flip-flop 301
S input terminal, releasing of making that its Q output exports control signal Dischr and become high level；Meanwhile single direct impulse signal
After 302 reverse phase of the second phase inverter, as lead-edge-blanking signal, in state switching to the driving modulated signal Drv into
Horizontal blanking；Described release controls after signal Dischr becomes high level, and three inputs unlock with door 303, wait the driving
Modulated signal Drv, when first switching signal of driving modulated signal Drv arrives, it is noted that driving modulated signal Drv is low electricity
Flat effective, three inputs become high level with the output of door 303, which resets rest-set flip-flop 301, make letting out for its Q output output
Putting control signal Dischr becomes low level, terminates to release.
The control module of releasing of the multilevel voltage output switch power source converter of the embodiment of the present invention, by controlling vent discharge
Pressure, so switching power converters it is not necessary that fictitious load is added in sampling network module, greatly reduce the waste of the energy；Can also
Transmission, which is released, controls signal Dischr to PWM control module 101, to shield PWM control module 101 because feedback voltage instantaneously rises
The high and output over-voltage protection signal of false triggering, it can occur that overvoltage protection mechanism in the circuit structure of sampling network module
Do not start when caused voltage is elevated when change, only start when other overtensions, improves Switching Power Supply and become
Stability, reliability and the safety that parallel operation 100 uses.Module of releasing can be released the time without default, be had with self adaptive control
There are very high adaptability and flexibility.
Referring to Fig. 6, the embodiment of the present invention proposes a kind of multilevel voltage output switch power source converter, including power switch tube
104, PWM control module 101, control module of releasing 201, voltage request module 102, sampling network module, switching tube 202 of releasing
With voltage change-over switch pipe 103；The voltage request module 102 receives external voltage request signal Vreq, and the voltage is asked
Signal Vreq is asked to be converted to voltage switch-over control signal VO_SWIt is sent to the control module 201 of releasing；Described release controls mould
Voltage switch-over control signal V described in 201 delay process of blockO_SW, and generate switch controlled signal VO_UPThe voltage is sent to turn
Switching tube 103 is changed, to control the circuit structure of sampling network module；And according to the voltage switch-over control signal VO_SWGeneration is let out
Control signal Dischr is put, and will be released and be controlled signal Dischr and be respectively sent to release switching tube 202 and PWM control module
101, to control the working condition for switching tube 202 of releasing, and shielding PWM control module 101 is due to feedback voltage instantaneously increases
The overvoltage protection signal of false triggering；The feedback voltage that the PWM control module 101 receives the sampling network module, which generates, to be corresponded to
Driving modulated signal Drv, control the working condition of the power switch tube 104；And driving modulated signal Drv is sent to institute
Control module 201 of releasing is stated, the control module 201 that makes to release, which carries out resetting, releases and control signal Dischr.
In the present embodiment, above-mentioned sampling network module passes through first resistor 107, second resistance 108 and 109 groups of 3rd resistor
At controlling the circuit structure of sampling network module, such as switching power converters by the on and off of voltage change-over switch pipe 103
When 100 normal work, the switch controlled signal V of the output of control module of releasing 201O_UPFor low level, voltage change-over switch pipe
103 cut-offs, 109 branch of 3rd resistor disconnects at this time, and the circuit of sampling network module is only by first resistor 107 and second resistance
108 series connection, output voltage is standard charge voltage.As the switch controlled signal V for the output of control module 201 of releasingO_UPFor height
Level, voltage change-over switch pipe 103 are connected, and 109 branch of 3rd resistor is connected at this time, and the circuit structure of sampling network module is the
Two resistance 108 are in parallel with 3rd resistor 109, and than changing, output voltage rises for sampling, realize high voltage output.
In the present embodiment, above-mentioned pressure control module includes delay circuit 10, leadage circuit 20 and leadage circuit 30；It is above-mentioned
Delay circuit 10 receives the switch-over control signal of voltage request module 102, and by switch-over control signal delay process at control electricity
The switch controlled signal of 103 ON/OFF of change-over switch pipe is pressed, to control the electricity of the sampling network module of the powered-down source converter
Line structure；Above-mentioned leadage circuit 20 receives switch-over control signal, is released according to switch-over control signal generation and controls signal, and will let out
Release switching tube 202 and PWM control module 101 that control signal is respectively sent to the switching power converters are put, with control
The output electricity of switching power converters, and shielding PWM control module 101 due to feedback voltage instantaneously increases false triggering it is defeated
Overvoltage protection signal out；Above-mentioned leadage circuit 30 receives the driving modulated signal that PWM control module 101 generates, and according to the drive
It releases described in dynamic modulated signal resetting and controls signal.
In the present embodiment, voltage request signal is converted into voltage switch-over control signal and is sent to by voltage request module 102
After switching power converters, switch controlled signal is obtained to its delay process by the delay buffer 304 of delay circuit 10,
The switch controlled signal is identical as voltage switch-over control signal, and the time only sent out is delayed, and is high level signal；?
When delay process voltage switch-over control signal, leadage circuit releases according to the generation of voltage switch-over control signal and controls signal,
It is respectively sent to release switching tube 202 and the PWM control module 101 of the switching power converters, above-mentioned release controls signal
Become high level in the failing edge of voltage switch-over control signal, at this point, 202 control switch supply convertor of switching tube of releasing
Voltage output is released, and the overvoltage protection signal in PWM control module 101, which is released, controls signal shielding, when voltage switching control
Signal, which generates and sends voltage change-over switch pipe 103, turns off voltage change-over switch pipe 103, the circuit knot of sampling network module
Structure changes, so as to cause the voltage in PWM control module 101 to increase, at this time since overvoltage protection signal is shielded,
So overvoltage protection mechanism will not be triggered.Then PWM control module 101 starts to generate driving modulated signal control power switch
Pipe work, while first driving control signal that PWM control module 101 generates is sent to leadage circuit 30, leadage circuit 30
Resetting is released and controls signal, makes the shutdown of switching tube 202 of releasing, stops releasing, be simultaneously stopped the shielding to overvoltage protection signal,
The output over-voltage protection mechanism of PWM control module 101 is set to restore normal.
In the present embodiment, above-mentioned leadage circuit 20 includes monopulse generator 305 and rest-set flip-flop 301；Pulse occurs
The switch-over control signal of the reception voltage request module of device 305, and switch-over control signal is converted into positive pulse signal；RS
The positive pulse signal is converted into releasing by trigger 301 to be controlled signal and is sent to switching tube 202 and the PWM control mould of releasing
Block 101.When the level rising edge of voltage switch-over control signal and the high and low level of holding, above-mentioned monopulse generator 305 is defeated
Low level is remained out；After the arrival of voltage switch-over control signal failing edge, the above-mentioned output of monopulse generator 305 one
The positive pulse signal V of a fixed durationO_DWN, then output returns to low level, positive pulse signal VO_DWNGenerate single direct impulse
It is input to the S input terminal of rest-set flip-flop 301, releasing of making that its Q output exports controls signal Dischr and become high level.
In the present embodiment, above-mentioned leadage circuit 30 includes three inputs and door 303, the first phase inverter 306, the second phase inverter
302 and the rest-set flip-flop 301；First phase inverter 306 receives the driving modulated signal of the PWM control module 101, and
Three inputs and door 303 are sent to after carrying out reverse phase processing to it；Second phase inverter 302 receives the monopulse generator
305 positive pulse signals generated, and three inputs and door 303 are sent to after being carried out reverse phase processing, the driving to reverse phase processing
Modulated signal carries out blanking；Three input receives described release with door 303 and controls signal, to control three input and door 303
On and off, when three inputs are opened with door 303, the driving modulated signal that reverse phase is handled is sent to institute with door 303 by three inputs
The resetting of rest-set flip-flop 301 is stated to release and control signal.In the present embodiment, three inputs receive the driving of reverse phase processing with door 303 respectively
The positive pulse signal V of modulated signal and reverse phase processingO_DWN, the positive pulse signal V of reverse phase processingO_DWNDriving to reverse phase processing
Modulated signal carries out elimination of hidden, when release control signal Dischr and become high level when, three inputs and door 303 unlock and
Conducting, when the driving modulated signal Drv that PWM control module 101 issues is low level, three inputs export high level with door 303
Signal, the high level signal reset rest-set flip-flop 301, so that its Q output signal is released and control signal Dischr and become low level,
Switching power converters are made to terminate the process of releasing.
Referring to Fig. 3, in the present embodiment, above-mentioned control module 201 of releasing include rest-set flip-flop 301, the second phase inverter 302,
The input of first phase inverter 306, three and door 303, delay buffer 304, monopulse generator 305；First external input terminals 311,
Second external input terminals 312, the first outside output end 313 and the second outside output end 314；The defeated of buffer 304 that be delayed
Enter end and connect the voltage request module 102 by first external input terminals 311, output end is defeated by first outside
Outlet 313 connects the voltage change-over switch pipe 103；The input terminal of the monopulse generator 305 passes through outside described first
Input terminal 311 connects the voltage request module 102, and output end is separately connected input terminal and the RS triggering of the second phase inverter 302
The S input terminal of device 301；Three input connect the output end of second phase inverter 302 with the first input end of door 303, the
Two input terminals connect the output end of first phase inverter 306, and the input terminal of the first phase inverter 306 is connected by the second input terminal
The output end of the PWM control module 101, third input terminal connect the Q output of the rest-set flip-flop 301；Output end connection
The R input of the rest-set flip-flop 301；The Q output of the rest-set flip-flop 301 is connected by second outside output end 314
Connect release switching tube 202 and the PWM control module 101.The control module 201 of releasing of the present embodiment, structure is simple, at low cost
It is honest and clean, its circuit also can be used in other embodiments, release requirement as long as can be realized control.Above-mentioned pulse occurs
The realization of RC charge and discharge electric line can be used in device 305, and the realization of digital circuit counter can also be used.
Referring to Fig. 4, in the present embodiment, when the switching power converters 100 work, above-mentioned delay buffer 304 is logical
It crosses the first external input terminals 311 and receives voltage switch-over control signal VO_SW, switch controlled signal is obtained after buffering delay
VO_UP, and exported through the first outside output end 313；The received voltage switch-over control signal V of module occurs for the pulseO_SWOn
When rising along and keeping high and low level, output remains low level；And if only if voltage switch-over control signal VO_SWFailing edge
After arrival, the direct impulse signal of a fixed duration is exported, then output returns to low level；When the voltage switching control is believed
Number VO_SWFailing edge arrive when, direct impulse signal generate single direct impulse be input to the rest-set flip-flop 301 S input
End, releasing of making that its Q output exports control signal Dischr and become high level；Meanwhile single direct impulse signal is by the
After two phase inverters, 302 reverse phase, as lead-edge-blanking signal, blanking is carried out to the driving modulated signal Drv in state switching；
Described release controls after signal Dischr becomes high level, and three inputs unlock with door 303, wait the driving modulated signal
Drv, when first switching signal of driving modulated signal Drv arrives, it is noted that driving modulated signal Drv is that low level is effective,
Three inputs become high level with the output of door 303, which resets rest-set flip-flop 301, the control letter of releasing for exporting its Q output
Number Dischr becomes low level, terminates to release.
The multilevel voltage output switch power source converter 100 of the embodiment of the present invention is controlled defeated by control module 201 of releasing
Voltage out, so greatly reducing the waste of the energy it is not necessary that fictitious load is added in sampling network module；It releases control module
201 can also send to release and control signal Dischr to PWM control module 101, to shield PWM control module 101 because of feedback electricity
Pressure instantaneously increases and the output over-voltage protection signal of false triggering, it can makes overvoltage protection mechanism in the circuit of sampling network module
Do not start when caused voltage is elevated when structure changes, only starts when other overtensions, raising is opened
Stability, reliability and the safety that powered-down source converter 100 uses；Module of releasing can be let out with self adaptive control without default
The time is put, there is very high adaptability and flexibility.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (7)
1. a kind of pressure release control method of multilevel voltage output switch power source converter, which is characterized in that
The voltage switch-over control signal delay process that voltage request module is sent is generated for controlling voltage change-over switch pipe
The switch controlled signal of ON/OFF, to control the circuit structure of the sampling network module of the switching power converters；
It releases according to voltage switch-over control signal generation and controls signal, and will release and control signal and be respectively sent to described open
Release switching tube and the PWM control module of powered-down source converter, with the output electricity of control switch supply convertor, and shielding
PWM control module overvoltage protection signal of false triggering due to feedback voltage instantaneously increases；
Driving modulated signal resetting by receiving the generation of PWM control module, which is released, controls signal；
The step of voltage switch-over control signal delay process that voltage request module is sent, comprising:
Delay process is carried out to voltage switch-over control signal by delay buffer.
2. the pressure release control method of multilevel voltage output switch power source converter according to claim 1, which is characterized in that
It is described that the step of controlling signal of releasing is generated according to the voltage switch-over control signal, comprising:
The voltage switch-over control signal is generated into positive pulse signal by monopulse generator；
Positive pulse signal is converted into releasing by rest-set flip-flop and controls signal.
3. the pressure release control method of multilevel voltage output switch power source converter according to claim 2, which is characterized in that
It is described to reset the step of controlling signal of releasing by receiving the driving modulated signal that PWM control module generates, comprising:
Three inputs and door are sent to after carrying out reverse phase processing by driving modulated signal of first phase inverter to PWM control module；
It will be sent to three inputs and door after positive pulse signal reverse phase processing, disappeared to the driving modulated signal of reverse phase processing
It is hidden；
By three inputs and door receive described in release and control signal, to control the on and off of three input and door, when three inputs with
When door is opened, the driving modulated signal of three inputs and the processing of goalkeeper's reverse phase is sent to the rest-set flip-flop and resets control letter of releasing
Number.
4. a kind of pressure control module of multilevel voltage output switch power source converter, which is characterized in that including delay circuit, let out
Discharge road and reset circuit；
The delay circuit receives the switch-over control signal of voltage request module, and by switch-over control signal delay process at control
The switch controlled signal of voltage change-over switch pipe ON/OFF, to control the sampling network module of the switching power converters
Circuit structure；
The leadage circuit receives switch-over control signal, is released according to switch-over control signal generation and controls signal, and the control that will release
Signal processed is respectively sent to release switching tube and the PWM control module of the switching power converters, with the change of control switch power supply
The output electricity of parallel operation, and shielding PWM control module overvoltage protection signal of false triggering due to feedback voltage instantaneously increases；
The reset circuit receives the driving modulated signal that PWM control module generates, and resets institute according to the driving modulated signal
It states to release and controls signal；
The delay circuit includes delay buffer,
The input terminal of the delay buffer connects the voltage request module, and output end connects the voltage change-over switch pipe；
The voltage request module is used to be converted to voltage request signal voltage switch-over control signal, and slow by the delay
It rushes the device processing voltage switch-over control signal and obtains switch controlled signal, the switch controlled signal is cut with the voltage
It is identical to change signal, is high level signal.
5. the pressure control module of multilevel voltage output switch power source converter according to claim 4, which is characterized in that
The leadage circuit includes monopulse generator and rest-set flip-flop；
The switch-over control signal of the reception voltage request module of the monopulse generator, and switch-over control signal is converted
At positive pulse signal；
The positive pulse signal is converted into releasing by the rest-set flip-flop to be controlled signal and is sent to release switching tube and the PWM control
Molding block.
6. the pressure control module of multilevel voltage output switch power source converter according to claim 5, which is characterized in that
The reset circuit includes three inputs and door, the first phase inverter, the second phase inverter and the rest-set flip-flop；
First phase inverter receives the driving modulated signal of the PWM control module, and sends after carrying out reverse phase processing to it
To three inputs and door；
Second phase inverter receives the positive pulse signal that the monopulse generator generates, and sends out after being carried out reverse phase processing
It send to three inputs and door, blanking is carried out to the driving modulated signal of reverse phase processing；
Three input and door release described in receiving and control signal, to control the on and off of three input and door, when three inputs with
When door is opened, the driving modulated signal of three inputs and the processing of goalkeeper's reverse phase is sent to the rest-set flip-flop and resets control letter of releasing
Number.
7. a kind of multilevel voltage output switch power source converter, which is characterized in that including voltage request module, releasing controls mould
Block, voltage change-over switch pipe, sampling network module, switching tube of releasing, PWM control module and power switch tube；
The voltage request module receives external voltage request signal, and the voltage request signal is converted to voltage switching control
Signal is sent to the control module of releasing；
The voltage switch-over control signal described in control module delay process of releasing, and generate switch controlled signal and be sent to institute
Voltage change-over switch pipe is stated, to control the circuit structure of sampling network module；And it is generated according to the voltage switch-over control signal
It releases and controls signal, and will release and control signal and be respectively sent to release switching tube and PWM control module, released switch with control
The working condition of pipe, and shielding PWM control module overvoltage protection signal of false triggering due to feedback voltage instantaneously increases；
The feedback voltage that the PWM control module receives the sampling network module generates corresponding driving modulated signal, control
The working condition of the power switch tube；And driving modulated signal is sent to the control module of releasing, making to release controls mould
Block carries out resetting to release controlling signal；
The release control module of the control module as described in any one of claim 4 to 6 of releasing.
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| CN201610053491.5A CN105515372B (en) | 2016-01-27 | 2016-01-27 | Multilevel voltage output switch power source converter and its pressure release control method and module |
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| CN201610053491.5A CN105515372B (en) | 2016-01-27 | 2016-01-27 | Multilevel voltage output switch power source converter and its pressure release control method and module |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1780131A (en) * | 2004-11-23 | 2006-05-31 | 尼克森微电子股份有限公司 | Pulse width modulator with automatic change of outputting frequency |
| CN100392965C (en) * | 2002-05-13 | 2008-06-04 | 罗姆股份有限公司 | Power device with improved output voltage responsiveness |
| CN205336105U (en) * | 2016-01-27 | 2016-06-22 | 深圳市瑞之辰科技有限公司 | Multistage voltage output switching power supply converter and pressure release control module thereof |
-
2016
- 2016-01-27 CN CN201610053491.5A patent/CN105515372B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392965C (en) * | 2002-05-13 | 2008-06-04 | 罗姆股份有限公司 | Power device with improved output voltage responsiveness |
| CN1780131A (en) * | 2004-11-23 | 2006-05-31 | 尼克森微电子股份有限公司 | Pulse width modulator with automatic change of outputting frequency |
| CN205336105U (en) * | 2016-01-27 | 2016-06-22 | 深圳市瑞之辰科技有限公司 | Multistage voltage output switching power supply converter and pressure release control module thereof |
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