CN105515372A - Multistage voltage output switch power converter and pressure relief control method and module thereof - Google Patents
Multistage voltage output switch power converter and pressure relief control method and module thereof Download PDFInfo
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- CN105515372A CN105515372A CN201610053491.5A CN201610053491A CN105515372A CN 105515372 A CN105515372 A CN 105515372A CN 201610053491 A CN201610053491 A CN 201610053491A CN 105515372 A CN105515372 A CN 105515372A
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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
The invention provides a multistage voltage output switch power converter and a pressure relief control method and module thereof. The pressure relief control method comprises the steps that a voltage switching control signal transmitted by a voltage request model is processed in a delay mode to generate a switch tube control signal used for controlling on-off of voltage conversion switch tube, so that a circuit structure of a sampling network module of the switch power converter is controlled; according to the voltage switch control signal, a relief control signal is generated, and the relief control signal is transmitted to a relief switch tube and a PWM control module of the switch power converter so as to control output electric quantity of the switch power converter and shield an output over-voltage protecting signal falsely triggered by the PWM control module due to instant rising of feedback voltage; by receiving a drive conditioning signal generated by the PWM control module, the relief control signal is reset. According to the power converter adopting pressure relief control, power consumption is reduced, and use stability, reliability and safety of the switch power converter are improved.
Description
Technical field
The present invention relates to switching power converters field, particularly relate to a kind of multilevel voltage output switch power source converter and pressure release control method thereof and module.
Background technology
Switching power converters has that volume is little, efficiency is high and the advantage of big current, is therefore widely used in the portable electric appts such as charger for mobile phone.In recent years, along with portable electric appts battery capacity constantly increases, charging rate is had higher requirement.In order to improve charging rate, current industry proposes two kinds of implementation methods, and one is increase charging current, and be second improve charging voltage, wherein second method has become industry main flow.
In order to realize improving the object of charging voltage, simultaneously backward compatible standard charge voltage (5V) again, also two kinds of implementation methods are had, one is use regular tap supply convertor to carry a special interface chip, and two is use to incorporate interface chip function, support the switching power converters that multilevel voltage exports.The present invention relates to multilevel voltage output switch power source converter.
Fig. 1 is a rough schematic view supporting the voltage-dropping type asynchronous rectified DC/DC switching power converters topology that two step voltages export.DC input voitage 411 is input to the Vin port of switch power controller 400, and PWM control module 401 controls the turn-on and turn-off of power switch pipe 404, is continued output power supply by inductor winding 405 and fly-wheel diode 406.First resistance 407, second resistance 408 and the 3rd resistance 409 form sampling network, to output voltage sampling, and by the FB port to switch power controller 400, feed back to PWM control module 401, be converted to the conducting duty ratio of power switch pipe 404, obtain stable output voltage thus.
When switch power controller 400 normally works, under default setting, the output signal Vo_up of voltage request module 402 is low level, voltage change-over switch pipe 403 ends, now the 3rd resistance 409 branch road disconnects, sampling network is only connected by the first resistance 407 and the second resistance 408, and output voltage is standard charge voltage (5V).When high voltage exports the Vreq port of request signal 412 by switch power controller 400, be input to voltage request module 402, its output signal Vo_up becomes high level, voltage change-over switch pipe 403 conducting, now the 3rd resistance 409 branch road conducting, under sampling network, to become the second resistance 408 in parallel with the 3rd resistance 409 for resistance, and sampling is than changing, output voltage rises, and realizes high voltage and exports.
In practice, when power receiving equipment removes or voltage request signal becomes normal voltage output request, switch power controller output voltage needs to transfer low-voltage to by high voltage.This process required time is determined by output current, when output no-load, this process may be very long, if not yet return to when normal voltage exports at output voltage and access again another incompatible high-tension power receiving equipment, then easily causing power receiving equipment impaired, so in order to accelerate conversion speed, adding resistance 410 as dummy load, but due to the resistance 410 branch road conducting always when system works, cause power loss.In addition; when output voltage is changed from high to low; due to sampling network structural change; cause that feedback voltage is instantaneous to be elevated; this often triggers output over-voltage protection (OVP) mechanism comprised in PWM control module 401; switch power controller 400 is caused unnecessarily to enter protected mode, if but cancel output OVP mechanism, reliability and the fail safe of transducer can be reduced again.
About the problem that dummy load loss power and overvoltage protection mechanism can not suitably start, be need to deal with problems.
Summary of the invention
Main purpose of the present invention for providing a kind of without the need to dummy load, and controls multilevel voltage output switch power source converter that overvoltage protection mechanism suitably starts and pressure release control method thereof and module.
In order to realize foregoing invention object, this present invention proposes a kind of pressure release control method of multilevel voltage output switch power source converter, comprising:
By the voltage switching control signal delay process that voltage request module sends, generate and be used for the open/close switch controlled signal of control voltage change over switch pipe, to control the circuit structure of the sampling network module of described pass supply convertor;
Control signal of releasing is generated according to described voltage switching control signal, and control signal of releasing is sent to respectively release switching tube and the PWM control module of described switching power converters, with the output electricity of control switch supply convertor, and shielding PWM control module because of feedback voltage instantaneous rising the overvoltage protection signal of false triggering;
The driving modulation signal generated by receiving PWM control module resets control signal of releasing.
Further, the step of described voltage switching control signal delay process voltage request module sent, comprising:
By time delay buffer to voltage switching control signal through line delay process.
Further, the described step generating control signal of releasing according to described voltage switching control signal, comprising:
By monopulse generator, described voltage switching control signal is generated positive pulse signal;
Positive pulse signal is converted to control signal of releasing by rest-set flip-flop.
Further, the described driving modulation signal generated by receiving PWM control module resets the step of control signal of releasing, and comprising:
Three value and gate is sent to after carrying out anti-phase process by the driving modulation signal of the first inverter to PWM control module;
Be sent to three value and gate by after anti-phase for described positive pulse signal process, blanking is carried out to the driving modulation signal of anti-phase process;
Release described in being received by three value and gate control signal, to control the Kai Heguan of this three value and gate, when three value and gate is opened, the driving modulation signal of anti-phase process is sent to described rest-set flip-flop and resets control signal of releasing by three value and gate.
The present invention also provides a kind of pressure control module of multilevel voltage output switch power source converter, comprises delay circuit, leadage circuit and reset circuit;
The switch-over control signal of described delay circuit receiver voltage request module, and switch-over control signal delay process is become the open/close switch controlled signal of control voltage change over switch pipe, to control the circuit structure of the sampling network module of described pass supply convertor;
Described leadage circuit receives switch-over control signal, control signal of releasing is generated according to switch-over control signal, and control signal of releasing is sent to respectively release switching tube and the PWM control module of described switching power converters, with the output electricity of control switch supply convertor, and shielding PWM control module because of feedback voltage instantaneous rising the overvoltage protection signal of false triggering;
Described reset circuit receives the driving modulation signal that PWM control module generates, and control signal of releasing described in resetting according to this driving modulation signal.
Further, described delay circuit comprises time delay buffer,
The input of described time delay buffer connects described voltage request module, and output connects described voltage change-over switch pipe.
Further, described leadage circuit comprises monopulse generator and rest-set flip-flop;
The switch-over control signal of the described voltage request module of reception of described monopulse generator, and convert switch-over control signal to positive pulse signal;
Described rest-set flip-flop described positive pulse signal is converted to control signal of releasing send to described in release switching tube and PWM control module.
Further, described reset circuit comprises three value and gate, the first inverter, the second inverter and described rest-set flip-flop;
Described first inverter receives the driving modulation signal of described PWM control module, and is sent to three value and gate after carrying out anti-phase process to it;
Described second inverter receives the positive pulse signal that described monopulse generator generates, and is sent to three value and gate after being carried out anti-phase process, carries out blanking to the driving modulation signal of anti-phase process;
Release described in described three value and gate receives control signal, to control the Kai Heguan of this three value and gate, when three value and gate is opened, the driving modulation signal of anti-phase process is sent to described rest-set flip-flop and resets control signal of releasing by three value and gate.
The present invention also provides a kind of multilevel voltage output switch power source converter, comprises voltage request module, control module of releasing, voltage change-over switch pipe, sampling network module, switching tube of releasing, PWM control module and power switch pipe;
Described voltage request module receives external voltage request signal, and this voltage request signal is converted to voltage switching control signal send to described in release control module;
Described voltage switching control signal described in control module delay process of releasing, and generate switch controlled signal and be sent to described voltage change-over switch pipe, to control the circuit structure of sampling network module; And generate according to described voltage switching control signal control signal of releasing, and control signal of releasing is sent to release switching tube and PWM control module respectively, with the operating state of controlled discharge switching tube, and shielding PWM control module because of feedback voltage instantaneous rising the overvoltage protection signal of false triggering;
The feedback voltage that described PWM control module receives described sampling network module generates corresponding driving modulation signal, controls the operating state of described power switch pipe; And control module of releasing described in driving modulation signal is sent to, the control module that makes to release is carried out replacement and to be released control signal.
Further, described pressure control module comprises delay circuit, leadage circuit and reset circuit;
The switch-over control signal of described delay circuit receiver voltage request module, and switch-over control signal delay process is become the open/close switch controlled signal of control voltage change over switch pipe, to control the circuit structure of the sampling network module of described pass supply convertor;
Described leadage circuit receives switch-over control signal, control signal of releasing is generated according to switch-over control signal, and control signal of releasing is sent to respectively release switching tube and the PWM control module of described switching power converters, with the output electricity of control switch supply convertor, and shielding PWM control module because of feedback voltage instantaneous rising the output over-voltage protection signal of false triggering;
Described reset circuit receives the driving modulation signal that PWM control module generates, and control signal of releasing described in resetting according to this driving modulation signal.
Further, described delay circuit comprises time delay buffer,
The input of described time delay buffer connects described voltage request module, and output connects described voltage change-over switch pipe.
Further, described leadage circuit comprises monopulse generator and rest-set flip-flop;
The switch-over control signal of the described voltage request module of reception of described monopulse generator, and convert switch-over control signal to positive pulse signal;
Described rest-set flip-flop described positive pulse signal is converted to control signal of releasing send to described in release switching tube and PWM control module.
Further, described reset circuit comprises three value and gate, the first inverter, the second inverter and described rest-set flip-flop;
Described first inverter receives the driving modulation signal of described PWM control module, and is sent to three value and gate after carrying out anti-phase process to it;
Described second inverter receives the positive pulse signal that described monopulse generator generates, and is sent to three value and gate after being carried out anti-phase process, carries out blanking to the driving modulation signal of anti-phase process;
Release described in described three value and gate receives control signal, to control the Kai Heguan of this three value and gate, when three value and gate is opened, the driving modulation signal of anti-phase process is sent to described rest-set flip-flop and resets control signal of releasing by three value and gate.
Multilevel voltage output switch power source converter of the present invention and pressure release control method thereof and module, control module of releasing is incorporated in multilevel voltage output switch power source converter, without the need to arranging dummy load, the loss of saving power, promote the speed of output voltage conversion and don't the efficiency of power supply can be damaged, again can be compatible with existing output over-voltage protection mechanism; Meanwhile, leadage circuit is adaptive control, releasing the time, having very high adaptability and flexibility without the need to presetting.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the multilevel voltage output switch power source converter of prior art;
Fig. 2 is the flow chart of the control method of releasing of the multilevel voltage output switch power source converter of one embodiment of the invention;
Fig. 3 is the circuit diagram of the control module of releasing of one embodiment of the invention;
Fig. 4 is the waveform schematic diagram of each signal in the multilevel voltage output switch power source converter of one embodiment of the invention;
Fig. 5 is the structured flowchart of the control module of releasing of the multilevel voltage output switch power source converter of one embodiment of the invention;
Fig. 6 is the circuit diagram of the multilevel voltage output switch power source converter of one embodiment of the invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
With reference 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, comprises step:
S1, voltage switching control signal delay process voltage request module sent, generate and be used for the open/close switch controlled signal of control voltage change over switch pipe, to control the circuit structure of the sampling network module of described switching power converters;
S2, generate according to described voltage switching control signal control signal of releasing, and control signal of releasing is sent to respectively release switching tube and the PWM control module of described switching power converters, with the output electricity of control switch supply convertor, and shielding PWM control module because of feedback voltage instantaneous rising the overvoltage protection signal of false triggering;
S3, the driving modulation signal generated by receiving PWM control module reset control signal of releasing.
As as described in above-mentioned steps S1, S2 and S3, voltage request module converts voltage request signal to voltage switching control signal, by time delay buffer, switch controlled signal is obtained to its delay process, this switch controlled signal is identical with voltage switching control signal, the time just sent out is delayed, and is high level signal, when delay process voltage switching control signal, control signal of releasing is generated according to voltage switching control signal, be sent to release switching tube and the PWM control module of described switching power converters respectively, above-mentioned control signal of releasing becomes high level when the high level of voltage switching control signal declines, now, the voltage of switch controlled of releasing switching power converters exports releases, overvoltage protection signal in PWM control module released control signal shielding, the conducting of voltage change-over switch pipe is made when voltage switching control signal generates and sends voltage change-over switch pipe, the circuit structure of sampling network module changes, thus the voltage in PWM control module may be caused to raise, now due to overvoltage protection signal conductively-closed, so overvoltage protection mechanism can not be triggered.Then PWM control module starts to produce the work of driving modulation signal control power switch pipe; replacement is released control signal by first drive control signal that simultaneously PWM control module produces; make switching tube shutoff of releasing; stopping is released; stop the shielding to overvoltage protection signal simultaneously, make the output over-voltage protection mechanism of PWM control module recover normal.
In the present embodiment, the above-mentioned step generating control signal of releasing according to described voltage switching control signal, comprising:
S21, by monopulse generator, described voltage switching control signal is generated positive pulse signal;
S22, convert positive pulse signal to control signal of releasing by rest-set flip-flop.
As described in above-mentioned steps S21 and S22, when the level rising edge of voltage switching control signal and when keeping high and low level, above-mentioned monopulse generator exports and remains low level; After voltage switching control signal trailing edge arrival that and if only if, above-mentioned monopulse generator exports the positive pulse signal V of a fixing duration
o_DWN, export subsequently and get back to low level, positive pulse signal V
o_DWNproduce the S input that single direct impulse is input to rest-set flip-flop, the control signal Dischr that releases that its Q output is exported becomes high level.
In the present embodiment, reset the step of control signal of releasing above by the driving modulation signal receiving the generation of PWM control module, comprising:
S31, carry out anti-phase process by the driving modulation signal of the first inverter to PWM control module after be sent to three value and gate;
S32, be sent to three value and gate by after anti-phase for described positive pulse signal process, blanking is carried out to the driving modulation signal of anti-phase process;
S33, to be received by three value and gate described in release control signal, to control the Kai Heguan of this three value and gate, when three value and gate is opened, the driving modulation signal of anti-phase process is sent to described rest-set flip-flop and resets control signal of releasing by three value and gate.
As described in above-mentioned steps S31, S32 and S33, three value and gate receives the driving modulation signal of anti-phase process and the positive pulse signal V of anti-phase process respectively
o_DWN, the positive pulse signal V of anti-phase process
o_DWNelimination of hidden is carried out to the driving modulation signal of anti-phase process, when the control signal Dischr that releases becomes high level, three value and gate unlocks and conducting, when the driving modulation signal Drv that PWM control module sends is low level, three value and gate exports high level signal, this high level signal resets rest-set flip-flop, makes its Q output end signal control signal Dischr that releases become low level, makes switching power converters terminate the process of releasing.
With reference to Fig. 3, in one embodiment, above-mentioned control module 201 of releasing specifically comprises rest-set flip-flop 301, second inverter 302, first inverter 306, three value and gate 303, time delay buffer 304, monopulse generator 305; The outside output 313 of first external input terminals 311, second external input terminals 312, first and the second outside output 314; The input of described time delay buffer 304 connects described voltage request module 102 by described first external input terminals 311, and output connects described voltage change-over switch pipe 103 by described first outside output 313; The input of described monopulse generator 305 connects described voltage request module 102 by described first external input terminals 311, and output connects the input of the second inverter 302 and the S input of rest-set flip-flop 301 respectively; The first input end of described three value and gate 303 connects the output of described second inverter 302, second input connects the output of described first inverter 306, the input of the first inverter 306 connects the output of described PWM control module 101 by the second input, the 3rd input connects the Q output of described rest-set flip-flop 301; Output connects the R input of described rest-set flip-flop 301; To release described in the Q output of described rest-set flip-flop 301 is connected by described second outside output 314 switching tube 202 and PWM control module 101.The control module 201 of releasing of the present embodiment, structure is simple, with low cost, also can use its circuit in other embodiments, as long as can realize controlled discharge requirement.Above-mentioned monopulse generator 305 can adopt RC discharge and recharge circuit to realize, and digital circuit counter also can be adopted to realize.
With reference to Fig. 4 and Fig. 6, in the present embodiment, when described switching power converters 100 works, above-mentioned time delay buffer 304 is by the first external input terminals 311 receiver voltage switch-over control signal V
o_SW, after buffering time delay, obtain switch controlled signal V
o_UP, and export through the first outside output 313; The voltage switching control signal V that described pulse generation module receives
o_SWrising edge and when keeping high and low level, its output remains low level; And if only if voltage switching control signal V
o_SWafter trailing edge arrives, export the direct impulse signal of a fixing duration, export subsequently and get back to low level; As described voltage switching control signal V
o_SWtrailing edge arrive time, direct impulse signal produces the S input that single direct impulse is input to described rest-set flip-flop 301301, and the control signal Dischr that releases that its Q output is exported becomes high level; Meanwhile, single direct impulse signal, after the second inverter 302 is anti-phase, as lead-edge-blanking signal, carries out blanking when state switches to described driving modulation signal Drv; After the described control signal Dischr that releases becomes high level, three value and gate 303 unlocks, wait for described driving modulation signal Drv, arrive when driving first switching signal of modulation signal Drv, notice and drive modulation signal Drv to be Low level effective, three value and gate 303 exports and becomes high level, and this signal resets rest-set flip-flop 301, the control signal Dischr that releases that its Q output is exported becomes low level, terminates to release.
The control method of releasing of the multilevel voltage output switch power source converter of the embodiment of the present invention, by controlled discharge voltage, so switching power converters without the need to adding dummy load in sampling network module, reduces the waste of the energy greatly; Also can send control signal Dischr to PWM control module of releasing; in order to shield PWM control module because of feedback voltage instantaneous rising the output over-voltage protection signal of false triggering; do not start in the voltage that overvoltage protection mechanism namely can be made to cause when the circuit structure of sampling network module changes is elevated; only start when other overtension, improve the stability of pass supply convertor use, reliability and fail safe.
With reference to Fig. 5, the embodiment of the present invention also provides a kind of pressure control module of multilevel voltage output switch power source converter, comprises delay circuit 10, leadage circuit 20 and leadage circuit 30;
The switch-over control signal of above-mentioned delay circuit 10 receiver voltage request module, and switch-over control signal delay process is become the open/close switch controlled signal of control voltage change over switch pipe, to control the circuit structure of the sampling network module of described pass supply convertor;
Above-mentioned leadage circuit 20 receives switch-over control signal, control signal of releasing is generated according to switch-over control signal, and control signal of releasing is sent to respectively release switching tube and the PWM control module of described switching power converters, with the output electricity of control switch supply convertor, and shielding PWM control module because of feedback voltage instantaneous rising the overvoltage protection signal of false triggering;
Above-mentioned leadage circuit 30 receives the driving modulation signal that PWM control module generates, and control signal of releasing described in resetting according to this driving modulation signal.
In the present embodiment, voltage request module converts voltage request signal to voltage switching control signal, by the time delay buffer of delay circuit 10, switch controlled signal is obtained to its delay process, this switch controlled signal is identical with voltage switching control signal, the time just sent out is delayed, and is high level signal, when delay process voltage switching control signal, leadage circuit generates according to voltage switching control signal control signal of releasing, be sent to release switching tube and the PWM control module of described switching power converters respectively, above-mentioned control signal of releasing becomes high level when the trailing edge of voltage switching control signal, now, the voltage of switch controlled of releasing switching power converters exports releases, overvoltage protection signal in PWM control module released control signal shielding, when voltage switching control signal generates and sends voltage change-over switch pipe, voltage change-over switch pipe is turned off, the circuit structure of sampling network module changes, thus the voltage in PWM control module may be caused to raise, now due to overvoltage protection signal conductively-closed, so overvoltage protection mechanism can not be triggered.Then PWM control module starts to produce the work of driving modulation signal control power switch pipe; first drive control signal that PWM control module produces simultaneously is sent to leadage circuit 30; replacement is released control signal by leadage circuit 30; make switching tube shutoff of releasing; stopping is released; stop the shielding to overvoltage protection signal simultaneously, make the output over-voltage protection mechanism of PWM control module recover normal.
In the present embodiment, above-mentioned leadage circuit 20 comprises monopulse generator 305 and rest-set flip-flop 301; The switch-over control signal of the described voltage request module of reception of monopulse generator 305, and convert switch-over control signal to positive pulse signal; Rest-set flip-flop 301 described positive pulse signal is converted to control signal of releasing send to described in release switching tube and PWM control module.When the level rising edge of voltage switching control signal and when keeping high and low level, above-mentioned monopulse generator 305 exports and remains low level; After voltage switching control signal trailing edge arrival that and if only if, above-mentioned monopulse generator 305 exports the positive pulse signal V of a fixing duration
o_DWN, export subsequently and get back to low level, positive pulse signal V
o_DWNproduce the S input that single direct impulse is input to rest-set flip-flop 301, the control signal Dischr that releases that its Q output is exported becomes high level.
In the present embodiment, above-mentioned leadage circuit 30 comprises three value and gate 303, first inverter 306, second inverter 302 and described rest-set flip-flop 301;
Described first inverter 306 receives the driving modulation signal of described PWM control module, and is sent to three value and gate 303 after carrying out anti-phase process to it; Described second inverter 302 receives the positive pulse signal that described monopulse generator 305 generates, and is sent to three value and gate 303 after being carried out anti-phase process, carries out blanking to the driving modulation signal of anti-phase process; To release described in described three value and gate 303 receives control signal, to control the Kai Heguan of this three value and gate 303, when three value and gate 303 is opened, the driving modulation signal of anti-phase process is sent to described rest-set flip-flop 301 and resets control signal of releasing by three value and gate 303.In the present embodiment, three value and gate 303 receives the driving modulation signal of anti-phase process and the positive pulse signal V of anti-phase process respectively
o_DWN, the positive pulse signal V of anti-phase process
o_DWNelimination of hidden is carried out to the driving modulation signal of anti-phase process, when the control signal Dischr that releases becomes high level, three value and gate 303 unlocks and conducting, when the driving modulation signal Drv that PWM control module 101 sends is low level, three value and gate 303 exports high level signal, this high level signal resets rest-set flip-flop 301, makes its Q output end signal control signal Dischr that releases become low level, makes switching power converters terminate the process of releasing.
With reference to Fig. 3, in one embodiment, above-mentioned control module 201 of releasing specifically comprises rest-set flip-flop 301, second inverter 302, first inverter 306, three value and gate 303, time delay buffer 304, monopulse generator 305; The outside output 313 of first external input terminals 311, second external input terminals 312, first and the second outside output 314; The input of described time delay buffer 304 connects described voltage request module 102 by described first external input terminals 311, and output connects described voltage change-over switch pipe 103 by described first outside output 313; The input of described monopulse generator 305 connects described voltage request module 102 by described first external input terminals 311, and output connects the input of the second inverter 302 and the S input of rest-set flip-flop 301 respectively; The first input end of described three value and gate 303 connects the output of described second inverter 302, second input connects the output of described first inverter 306, the input of the first inverter 306 connects the output of described PWM control module 101 by the second input, the 3rd input connects the Q output of described rest-set flip-flop 301; Output connects the R input of described rest-set flip-flop 301; To release described in the Q output of described rest-set flip-flop 301 is connected by described second outside output 314 switching tube and PWM control module.The control module of releasing of the present embodiment, structure is simple, with low cost, also can use its circuit in other embodiments, as long as can realize controlled discharge requirement.Above-mentioned monopulse generator 305 can adopt RC discharge and recharge circuit to realize, and digital circuit counter also can be adopted to realize.
With reference to Fig. 4 and Fig. 6, in the present embodiment, when described switching power converters 100 works, above-mentioned time delay buffer 304 is by the first external input terminals 311 receiver voltage switch-over control signal V
o_SW, after buffering time delay, obtain switch controlled signal V
o_UP, and export through the first outside output 313; The voltage switching control signal V that described pulse generation module receives
o_SWrising edge and when keeping high and low level, its output remains low level; And if only if voltage switching control signal V
o_SWafter trailing edge arrives, export the direct impulse signal of a fixing duration, export subsequently and get back to low level; As described voltage switching control signal V
o_SWtrailing edge arrive time, direct impulse signal produces the S input that single direct impulse is input to described rest-set flip-flop 301, and the control signal Dischr that releases that its Q output is exported becomes high level; Meanwhile, single direct impulse signal, after the second inverter 302 is anti-phase, as lead-edge-blanking signal, carries out blanking when state switches to described driving modulation signal Drv; After the described control signal Dischr that releases becomes high level, three value and gate 303 unlocks, wait for described driving modulation signal Drv, arrive when driving first switching signal of modulation signal Drv, notice and drive modulation signal Drv to be Low level effective, three value and gate 303 exports and becomes high level, and this signal resets rest-set flip-flop 301, the control signal Dischr that releases that its Q output is exported 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 controlled discharge voltage, so switching power converters without the need to adding dummy load in sampling network module, reduces the waste of the energy greatly; Also can send control signal Dischr to PWM control module 101 of releasing; in order to shield PWM control module 101 because of feedback voltage instantaneous rising the output over-voltage protection signal of false triggering; do not start in the voltage that overvoltage protection mechanism namely can be made to cause when the circuit structure of sampling network module changes is elevated; only start when other overtension, improve the stability of switching power converters 100 use, reliability and fail safe.Module of releasing can adaptive control, releasing the time, having very high adaptability and flexibility without the need to presetting.
With reference to Fig. 6, the embodiment of the present invention proposes a kind of multilevel voltage output switch power source converter, comprises power switch pipe 104, PWM control module 101, control module of releasing 201, voltage request module 102, sampling network module, release switching tube 202 and voltage change-over switch pipe 103; Described voltage request module 102 receives external voltage request signal Vreq, and this voltage request signal Vreq is converted to voltage switching control signal V
o_SWto release described in sending to control module 201; The described voltage switching control signal V described in control module 201 delay process that releases
o_SW, and generate switch controlled signal V
o_UPbe sent to described voltage change-over switch pipe 103, to control the circuit structure of sampling network module; And according to described voltage switching control signal V
o_SWgeneration is released control signal Dischr, and the control signal Dischr that will release is sent to release switching tube 202 and PWM control module 101 respectively, with the operating state of controlled discharge switching tube 202, and shielding PWM control module 101 because of feedback voltage instantaneous rising the overvoltage protection signal of false triggering; The feedback voltage that described PWM control module 101 receives described sampling network module generates corresponding driving modulation signal Drv, controls the operating state of described power switch pipe 104; And control module 201 of releasing described in driving modulation signal Drv is sent to, the control module 201 that makes to release is carried out replacement and to be released control signal Dischr.
In the present embodiment, above-mentioned sampling network module consists of the first resistance 107, second resistance 108 and the 3rd resistance 109, by the circuit structure opening and close control sampling network module of voltage change-over switch pipe 103, when such as switching power converters 100 normally works, the switch controlled signal V that control module of releasing 201 exports
o_UPfor low level, voltage change-over switch pipe 103 ends, and now the 3rd resistance 109 branch road disconnects, and the circuit of sampling network module is only connected by the first resistance 107 and the second resistance 108, and output voltage is standard charge voltage.As the switch controlled signal V that control module 201 of releasing exports
o_UPfor high level, voltage change-over switch pipe 103 conducting, now the 3rd resistance 109 branch road conducting, the circuit structure of sampling network module is that the second resistance 108 is in parallel with the 3rd resistance 109, and sampling is than changing, and output voltage rises, and realizes high voltage and exports.
In the present embodiment, above-mentioned pressure control module comprises delay circuit 10, leadage circuit 20 and leadage circuit 30; The switch-over control signal of above-mentioned delay circuit 10 receiver voltage request module 102, and switch-over control signal delay process is become the open/close switch controlled signal of control voltage change over switch pipe 103, to control the circuit structure of the sampling network module of described pass supply convertor; Above-mentioned leadage circuit 20 receives switch-over control signal, control signal of releasing is generated according to switch-over control signal, and control signal of releasing is sent to respectively release switching tube 202 and the PWM control module 101 of described switching power converters, with the output electricity of control switch supply convertor, and shielding PWM control module 101 because of feedback voltage instantaneous rising the output over-voltage protection signal of false triggering; Above-mentioned leadage circuit 30 receives the driving modulation signal that PWM control module 101 generates, and control signal of releasing described in resetting according to this driving modulation signal.
In the present embodiment, voltage request signal converts to after voltage switching control signal is sent to switching power converters by voltage request module 102, by the time delay buffer 304 of delay circuit 10, switch controlled signal is obtained to its delay process, this switch controlled signal is identical with voltage switching control signal, the time just sent out is delayed, and is high level signal, when delay process voltage switching control signal, leadage circuit generates according to voltage switching control signal control signal of releasing, be sent to release switching tube 202 and the PWM control module 101 of described switching power converters respectively, above-mentioned control signal of releasing becomes high level when the trailing edge of voltage switching control signal, now, release switching tube 202 control switch supply convertor voltage export release, overvoltage protection signal in PWM control module 101 released control signal shielding, when voltage switching control signal generates and sends voltage change-over switch pipe 103, voltage change-over switch pipe 103 is turned off, the circuit structure of sampling network module changes, thus the voltage in PWM control module 101 may be caused to raise, now due to overvoltage protection signal conductively-closed, so overvoltage protection mechanism can not be triggered.Then PWM control module 101 starts to produce the work of driving modulation signal control power switch pipe; first drive control signal that PWM control module 101 produces simultaneously is sent to leadage circuit 30; replacement is released control signal by leadage circuit 30; the switching tube 202 that makes to release turns off; stopping is released; stop the shielding to overvoltage protection signal simultaneously, make the output over-voltage protection mechanism of PWM control module 101 recover normal.
In the present embodiment, above-mentioned leadage circuit 20 comprises monopulse generator 305 and rest-set flip-flop 301; The switch-over control signal of the described voltage request module of reception of monopulse generator 305, and convert switch-over control signal to positive pulse signal; Rest-set flip-flop 301 described positive pulse signal is converted to control signal of releasing send to described in release switching tube 202 and PWM control module 101.When the level rising edge of voltage switching control signal and when keeping high and low level, above-mentioned monopulse generator 305 exports and remains low level; After voltage switching control signal trailing edge arrival that and if only if, above-mentioned monopulse generator 305 exports the positive pulse signal V of a fixing duration
o_DWN, export subsequently and get back to low level, positive pulse signal V
o_DWNproduce the S input that single direct impulse is input to rest-set flip-flop 301, the control signal Dischr that releases that its Q output is exported becomes high level.
In the present embodiment, above-mentioned leadage circuit 30 comprises three value and gate 303, first inverter 306, second inverter 302 and described rest-set flip-flop 301; Described first inverter 306 receives the driving modulation signal of described PWM control module 101, and is sent to three value and gate 303 after carrying out anti-phase process to it; Described second inverter 302 receives the positive pulse signal that described monopulse generator 305 generates, and is sent to three value and gate 303 after being carried out anti-phase process, carries out blanking to the driving modulation signal of anti-phase process; To release described in described three value and gate 303 receives control signal, to control the Kai Heguan of this three value and gate 303, when three value and gate 303 is opened, the driving modulation signal of anti-phase process is sent to described rest-set flip-flop 301 and resets control signal of releasing by three value and gate 303.In the present embodiment, three value and gate 303 receives the driving modulation signal of anti-phase process and the positive pulse signal V of anti-phase process respectively
o_DWN, the positive pulse signal V of anti-phase process
o_DWNelimination of hidden is carried out to the driving modulation signal of anti-phase process, when the control signal Dischr that releases becomes high level, three value and gate 303 unlocks and conducting, when the driving modulation signal Drv that PWM control module 101 sends is low level, three value and gate 303 exports high level signal, this high level signal resets rest-set flip-flop 301, makes its Q output end signal control signal Dischr that releases become low level, makes switching power converters terminate the process of releasing.
With reference to Fig. 3, in the present embodiment, above-mentioned control module 201 of releasing comprises rest-set flip-flop 301, second inverter 302, first inverter 306, three value and gate 303, time delay buffer 304, monopulse generator 305; The outside output 313 of first external input terminals 311, second external input terminals 312, first and the second outside output 314; The input of described time delay buffer 304 connects described voltage request module 102 by described first external input terminals 311, and output connects described voltage change-over switch pipe 103 by described first outside output 313; The input of described monopulse generator 305 connects described voltage request module 102 by described first external input terminals 311, and output connects the input of the second inverter 302 and the S input of rest-set flip-flop 301 respectively; The first input end of described three value and gate 303 connects the output of described second inverter 302, second input connects the output of described first inverter 306, the input of the first inverter 306 connects the output of described PWM control module 101 by the second input, the 3rd input connects the Q output of described rest-set flip-flop 301; Output connects the R input of described rest-set flip-flop 301; To release described in the Q output of described rest-set flip-flop 301 is connected by described second outside output 314 switching tube 202 and PWM control module 101.The control module 201 of releasing of the present embodiment, structure is simple, with low cost, also can use its circuit in other embodiments, as long as can realize controlled discharge requirement.Above-mentioned monopulse generator 305 can adopt RC discharge and recharge circuit to realize, and digital circuit counter also can be adopted to realize.
With reference to Fig. 4, in the present embodiment, when described switching power converters 100 works, above-mentioned time delay buffer 304 is by the first external input terminals 311 receiver voltage switch-over control signal V
o_SW, after buffering time delay, obtain switch controlled signal V
o_UP, and export through the first outside output 313; The voltage switching control signal V that described pulse generation module receives
o_SWrising edge and when keeping high and low level, its output remains low level; And if only if voltage switching control signal V
o_SWafter trailing edge arrives, export the direct impulse signal of a fixing duration, export subsequently and get back to low level; As described voltage switching control signal V
o_SWtrailing edge arrive time, direct impulse signal produces the S input that single direct impulse is input to described rest-set flip-flop 301, and the control signal Dischr that releases that its Q output is exported becomes high level; Meanwhile, single direct impulse signal, after the second inverter 302 is anti-phase, as lead-edge-blanking signal, carries out blanking when state switches to described driving modulation signal Drv; After the described control signal Dischr that releases becomes high level, three value and gate 303 unlocks, wait for described driving modulation signal Drv, arrive when driving first switching signal of modulation signal Drv, notice and drive modulation signal Drv to be Low level effective, three value and gate 303 exports and becomes high level, and this signal resets rest-set flip-flop 301, the control signal Dischr that releases that its Q output is exported becomes low level, terminates to release.
The multilevel voltage output switch power source converter 100 of the embodiment of the present invention, by releasing, control module 201 controls output voltage, so without the need to adding dummy load in sampling network module, reduce the waste of the energy greatly; Control module of releasing 201 also can send control signal Dischr to PWM control module 101 of releasing, in order to shield PWM control module 101 because of feedback voltage instantaneous rising the output over-voltage protection signal of false triggering, do not start in the voltage that overvoltage protection mechanism namely can be made to cause when the circuit structure of sampling network module changes is elevated, only start when other overtension, improve the stability of switching power converters 100 use, reliability and fail safe; Module of releasing can adaptive control, releasing the time, having very high adaptability and flexibility without the need to presetting.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a pressure release control method for multilevel voltage output switch power source converter, is characterized in that,
By the voltage switching control signal delay process that voltage request module sends, generate and be used for the open/close switch controlled signal of control voltage change over switch pipe, to control the circuit structure of the sampling network module of described pass supply convertor;
Control signal of releasing is generated according to described voltage switching control signal, and control signal of releasing is sent to respectively release switching tube and the PWM control module of described switching power converters, with the output electricity of control switch supply convertor, and shielding PWM control module because of feedback voltage instantaneous rising the overvoltage protection signal of false triggering;
The driving modulation signal generated by receiving PWM control module resets control signal of releasing.
2. the pressure release control method of multilevel voltage output switch power source converter according to claim 1, is characterized in that, the step of described voltage switching control signal delay process voltage request module sent, comprising:
By time delay buffer to voltage switching control signal through line delay process.
3. the pressure release control method of multilevel voltage output switch power source converter according to claim 1, is characterized in that, the described step generating control signal of releasing according to described voltage switching control signal, comprising:
By monopulse generator, described voltage switching control signal is generated positive pulse signal;
Positive pulse signal is converted to control signal of releasing by rest-set flip-flop.
4. the pressure release control method of multilevel voltage output switch power source converter according to claim 3, is characterized in that, the described driving modulation signal generated by receiving PWM control module resets the step of control signal of releasing, and comprising:
Three value and gate is sent to after carrying out anti-phase process by the driving modulation signal of the first inverter to PWM control module;
Be sent to three value and gate by after anti-phase for described positive pulse signal process, blanking is carried out to the driving modulation signal of anti-phase process;
Release described in being received by three value and gate control signal, to control the Kai Heguan of this three value and gate, when three value and gate is opened, the driving modulation signal of anti-phase process is sent to described rest-set flip-flop and resets control signal of releasing by three value and gate.
5. a pressure control module for multilevel voltage output switch power source converter, is characterized in that, comprises delay circuit, leadage circuit and reset circuit;
The switch-over control signal of described delay circuit receiver voltage request module, and switch-over control signal delay process is become the open/close switch controlled signal of control voltage change over switch pipe, to control the circuit structure of the sampling network module of described pass supply convertor;
Described leadage circuit receives switch-over control signal, control signal of releasing is generated according to switch-over control signal, and control signal of releasing is sent to respectively release switching tube and the PWM control module of described switching power converters, with the output electricity of control switch supply convertor, and shielding PWM control module because of feedback voltage instantaneous rising the overvoltage protection signal of false triggering;
Described reset circuit receives the driving modulation signal that PWM control module generates, and control signal of releasing described in resetting according to this driving modulation signal.
6. the pressure control module of multilevel voltage output switch power source converter according to claim 5, it is characterized in that, described delay circuit comprises time delay buffer,
The input of described time delay buffer connects described voltage request module, and output connects described voltage change-over switch pipe.
7. the pressure control module of multilevel voltage output switch power source converter according to claim 5, it is characterized in that, described leadage circuit comprises monopulse generator and rest-set flip-flop;
The switch-over control signal of the described voltage request module of reception of described monopulse generator, and convert switch-over control signal to positive pulse signal;
Described rest-set flip-flop described positive pulse signal is converted to control signal of releasing send to described in release switching tube and PWM control module.
8. the pressure control module of multilevel voltage output switch power source converter according to claim 7, is characterized in that, described reset circuit comprises three value and gate, the first inverter, the second inverter and described rest-set flip-flop;
Described first inverter receives the driving modulation signal of described PWM control module, and is sent to three value and gate after carrying out anti-phase process to it;
Described second inverter receives the positive pulse signal that described monopulse generator generates, and is sent to three value and gate after being carried out anti-phase process, carries out blanking to the driving modulation signal of anti-phase process;
Release described in described three value and gate receives control signal, to control the Kai Heguan of this three value and gate, when three value and gate is opened, the driving modulation signal of anti-phase process is sent to described rest-set flip-flop and resets control signal of releasing by three value and gate.
9. a multilevel voltage output switch power source converter, is characterized in that, comprises voltage request module, control module of releasing, voltage change-over switch pipe, sampling network module, switching tube of releasing, PWM control module and power switch pipe;
Described voltage request module receives external voltage request signal, and this voltage request signal is converted to voltage switching control signal send to described in release control module;
Described voltage switching control signal described in control module delay process of releasing, and generate switch controlled signal and be sent to described voltage change-over switch pipe, to control the circuit structure of sampling network module; And generate according to described voltage switching control signal control signal of releasing, and control signal of releasing is sent to release switching tube and PWM control module respectively, with the operating state of controlled discharge switching tube, and shielding PWM control module because of feedback voltage instantaneous rising the overvoltage protection signal of false triggering;
The feedback voltage that described PWM control module receives described sampling network module generates corresponding driving modulation signal, controls the operating state of described power switch pipe; And control module of releasing described in driving modulation signal is sent to, the control module that makes to release is carried out replacement and to be released control signal.
10. multilevel voltage output switch power source converter according to claim 9, is characterized in that, described in release the release control module of control module according to any one of claim 5 to 8.
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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 |
-
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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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