CN104539141B - Switching Power Supply dipulse pulsewidth limiting circuit and its implementation - Google Patents
Switching Power Supply dipulse pulsewidth limiting circuit and its implementation Download PDFInfo
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- CN104539141B CN104539141B CN201410740801.1A CN201410740801A CN104539141B CN 104539141 B CN104539141 B CN 104539141B CN 201410740801 A CN201410740801 A CN 201410740801A CN 104539141 B CN104539141 B CN 104539141B
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- 230000000295 complement effect Effects 0.000 claims abstract description 20
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- 208000031361 Hiccup Diseases 0.000 claims description 77
- 239000004065 semiconductor Substances 0.000 claims description 33
- 230000005611 electricity Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 8
- 210000001367 artery Anatomy 0.000 claims description 7
- 210000003462 vein Anatomy 0.000 claims description 7
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 3
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0029—Circuits or arrangements for limiting the slope of switching signals, e.g. slew rate
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Abstract
The invention discloses a kind of Switching Power Supply dipulse pulsewidth limiting circuit, it includes pulsewidth limiting circuit and electronic switching circuit, and pulsewidth limiting circuit is connected with electronic switching circuit；There is circuit in the external dipulse of pulsewidth limiting circuit, dipulse occurs circuit to be used to generate two-way mutual symmetry, the inceptive impulse signal with Dead Time, pulsewidth limiting circuit is used for the drive pulse signal of the two-way complementation that inceptive impulse signal is converted to default pulsewidth, and the pulse control signal of generation is sent to electronic switching circuit；Electronic switching circuit is used to select output channel according to pulse control signal, by the complementary drive pulse signal output of the two-way of default pulsewidth.The present invention solves the problems, such as the pulsewidth limitation of dipulse by pulsewidth limiting circuit and electronic switching circuit, has reached and has not been limited by two-way pulse generation source, and can flexibly set the technique effect of controlled two-way pulse.
Description
Technical field
The invention belongs to Switching Power Supply pulse-width controlled technical field, more particularly to a kind of limitation of Switching Power Supply dipulse pulsewidth
Circuit and its implementation.
Background technology
With developing rapidly for Power Electronic Technique, Switching Power Supply turned into people work, life in it is indispensable
Electronic equipment, it has been applied to electronic information field with small-sized, light and efficient feature.
According to topological structure, the difference of control mode, the pulse of driving switch pipe has pulse, Shuan Mai in Switching Power Supply
Punching, or even multiple-pulse.And the pulse of driving switch pipe is all realized using special pwm chip mostly in Switching Power Supply.
And the Switching Power Supply of existing big or middle power, it can be common that use full-bridge topologies.But, full-bridge topology knot
The circuit requirement of structure controls the switching tube on adjacent bridge arm to turn in turn, it is therefore desirable to the dipulse of mutual symmetry is controlled,
The maximum duty cycle of pulse is 50%.When load change or control circuit abnormality, power supply works long hours in PWM chip most
Near big output pulse width, switching tube is in long-time conducting state, and the switch tube current on adjacent bridge arm may be caused when serious
It is asymmetric, or even situation about simultaneously turning on, so as to burn out switching tube, so that causing damage.In order to avoid the generation of this problem, can
Capable solution is the maximum output pulsewidth for limiting pwm chip, switching tube is operated in safe current region.
The method of existing limitation pulse width has a lot, and relatively common is the PWM cores for including carrying Power MOSFET
Piece and independent pulsewidth limiting circuit.
For the PWM chip with Power MOSFET, it is divided into fixed Dead Time and Dead Time is configurable two kinds.Example
Such as：Control chip CM6900 series, Dead Time was fixed as 400 nanoseconds.The Dead Time of control chip SG3525 series can root
Configured according to outer meeting resistance and electric capacity.But, the former is not easy to the flexible configuration of pulse width, and, neither it is applicable number
Word Switching power supply is on hardware to the demand of pulsewidth limitation.
For independent pulsewidth limiting circuit, such as Chinese utility model patent application (number of patent application：
201220684107.9, utility model title：A kind of pulsewidth limiting circuit of LED driver) publicity circuit, using resistance,
Electric capacity constitute differential circuit come realize pulsewidth limit.But, realize that the reliability of the limitation of pulsewidth is not high by the method, electricity
Triode in road easily misleads, and is relatively applicable the pulsewidth limitation of pulse.And for example Chinese invention patent application (patent application
Number：201410396623.5, denomination of invention：A kind of pulsewidth limiting circuit of inverter) application publicity circuit, the circuit lead to
The electric current of the PWM adjustable sides for controlling injection pwm chip is crossed to limit pulsewidth, but, the method excessively relies on PWM control cores
Piece, it is impossible to be applicable digitizing switch power supply on hardware to the demand of pulsewidth limitation.
However, being driven using dipulse in big or middle power grade Switching Power Supply application scenario more.Therefore, how to solve
Certainly the pulsewidth restricted problem of dipulse, is current technical problem urgently to be resolved hurrily.
The content of the invention
It is a primary object of the present invention to provide a kind of Switching Power Supply dipulse pulsewidth limiting circuit, dipulse is solved
The problem of pulsewidth limitation, has reached and has not been limited by two-way pulse generation source, and can flexibly set the pulsewidth of controlled two-way pulse
Technique effect.
To achieve the above object, the invention provides a kind of Switching Power Supply dipulse pulsewidth limiting circuit, it includes pulsewidth
Limiting circuit and electronic switching circuit, the pulsewidth limiting circuit are connected with the electronic switching circuit.
There is circuit in the external dipulse of pulsewidth limiting circuit, the dipulse occurs circuit to be used to generate two-way complementation
Symmetrically, the inceptive impulse signal with Dead Time, the pulsewidth limiting circuit is pre- for the inceptive impulse signal to be converted to
If the complementary drive pulse signal of the two-way of pulsewidth, and generation pulse control signal is sent to electronic switching circuit.
The electronic switching circuit is used to select output channel according to the pulse control signal, by the default pulsewidth
The complementary drive pulse signal output of two-way.
Preferably, the Switching Power Supply dipulse pulsewidth limiting circuit also includes power-on reset circuitry, the power-on reset
Circuit is connected with pulsewidth limiting circuit, electronic switching circuit respectively.
The power-on reset circuitry is used to control the electronic switching circuit, after power on delay preset time period of starting shooting,
Export the complementary drive pulse signal of the two-way of the default pulsewidth.
Preferably, the Switching Power Supply dipulse pulsewidth limiting circuit is also including controlling circuit and hiccup control electricity complete cycle
Road, controls the circuit external dipulse that circuit occurs, and be connected with the electronic switching circuit complete cycle；The hiccup
The control external control loop of circuit, the control loop is used for the useful signal whether detection switch power supply hiccup phenomenon occurs,
The hiccup control circuit is connected with the pulsewidth limiting circuit, electronic switching circuit respectively.
The complete cycle controls circuit, for being switched by any one pulse signal detection in the inceptive impulse signal
Whether power supply there is hiccup phenomenon, and generation hiccup start pulse signal.
The hiccup control circuit, the useful signal for gathering the control loop, and according to hiccup control signal
The pulsewidth limiting circuit is controlled, so that pulsewidth limiting circuit output pulse control signal, the electronic switching circuit root
Output channel is selected according to pulse control signal, inceptive impulse signal is exported.
The electronic switching circuit, for according to start pulse signal and useful signal generation hiccup control signal.
Preferably, with the dipulse of outside there is the first signal input part of circuit and the second letter in the pulsewidth limiting circuit
Number input connection, first signal input part is connected with the anode of the first diode, the secondary signal input and institute
State the anode connection of the second diode, the 3rd pin of first Schmidt trigger negative electrode respectively with the first diode,
The negative electrode of the second diode, it is connected with one end of the second electric capacity through second resistance, and is grounded through second resistance, described first applies
4th pin of schmitt trigger anode respectively with the 3rd diode, the other end through 3rd resistor and the second electric capacity, through the
5th pin of three resistance and the second Schmidt trigger, the anode of the 4th diode, the 9th of the 3rd Schmidt trigger draw
Pin is connected, and the 5th pin of second Schmidt trigger is connected with the negative electrode of the 3rd diode, and second Schmidt touches
The 6th pin for sending out device is connected through the grid of the 4th resistance negative electrode respectively with the 4th diode, the first metal-oxide-semiconductor, and the described 3rd applies
9th pin of schmitt trigger is connected with the anode of the 4th diode, and the 8th pin of the 3rd Schmidt trigger is through
It is the drain electrode respectively with the first metal-oxide-semiconductor of five resistance, one end of the 3rd electric capacity, the 11st pin of the 4th Schmidt trigger, described
Hiccup control circuit connection, the former pole ground connection of first metal-oxide-semiconductor, the other end ground connection of the 3rd electric capacity, the described 4th applies
Tenth pin of schmitt trigger is connected with the electronic switching circuit.
Preferably, the electronic switching circuit has an electronic switch, the VEE pins and VSS pins of the electronic switch with
And the 4th electric capacity one end ground connection, the VDD pins and INH pins of the electronic switch, the other end of the 4th electric capacity are opened with described
Machine reset circuit is connected, and the of the C pins and B pins of the electronic switch and the 4th Schmidt trigger of pulsewidth limiting circuit
Ten pins are connected, and A pins and the complete cycle of the electronic switch control circuit to be connected, and the X pins and X0 of the electronic switch draw
Pin is connected with the hiccup control circuit respectively, Z1 pins and Y1 the pins ground connection of the electronic switch, the Z of the electronic switch
Pin is connected with PDRA, and its Y pin is connected with PDRB, and its Z0 pin is connected with OUTA, and its Y0 pin is connected with OUTB.
Preferably, the power-on reset circuitry have a power supply, the power supply respectively with the electronic switching circuit
VDD pins and the 4th electric capacity one end, one end connection of the 5th electric capacity, the other end of the 5th electric capacity respectively with the electronic cutting
The negative electrode connection of the INH pins, the 5th diode on powered-down road, and through the 6th resistance eutral grounding, the anode of the 5th diode
Ground connection.
Preferably, controlling circuit the complete cycle has the 5th Schmidt trigger, the 5th Schmidt trigger
First pin is connected with one end of the first electric capacity, and is grounded through first resistor, and the second of the 5th Schmidt trigger draws
Pin is connected with the A pins of the electronic switching circuit, and the 14th pin of the 5th Schmidt trigger is connected with power supply, institute
The 7th pin ground connection of the 5th Schmidt trigger is stated, the other end and the dipulse of first electric capacity occur the first letter of circuit
Any one input connection in number input and secondary signal input.
Preferably, the hiccup control circuit includes the second metal-oxide-semiconductor and the 6th Schmidt trigger, the 6th Schmidt
13rd pin of trigger through the control loop outside the 7th electrical resistance collection useful signal, the 6th Schmidt trigger
The 12nd pin be connected with the X pins of the electronic switching circuit, the grid of second metal-oxide-semiconductor is powered-down with the electronic cutting
The X0 pins connection on road, and through the 6th capacity earth, through the 8th resistance eutral grounding, the former pole of second metal-oxide-semiconductor is grounded, described
Second metal-oxide-semiconductor drain electrode respectively with the 11st pin, the 3rd electric capacity of the 4th Schmidt trigger of the pulsewidth limiting circuit
One end, one end of the 5th resistance, the first metal-oxide-semiconductor drain electrode connection.
Additionally, to achieve the above object, present invention also offers a kind of reality of Switching Power Supply dipulse pulsewidth limiting circuit
There is circuit, pulsewidth limiting circuit, electronic switching circuit in existing method, the dipulse that structure is sequentially connected, and respectively with it is described
Pulsewidth limiting circuit, the power-on reset circuitry of electronic switching circuit connection；
There is circuit evolving two-way mutual symmetry, the inceptive impulse signal with Dead Time in dipulse, and will be described initial
Pulse signal is sent to the pulsewidth limiting circuit；
The inceptive impulse signal is converted to pulsewidth limiting circuit the drive pulse signal of the two-way complementation of default pulsewidth,
And send to electronic switching circuit the pulse control signal of generation；
The electronic switching circuit selects output channel according to the pulse control signal for receiving, by the default arteries and veins
The complementary drive pulse signal output of two-way wide；
The power-on reset circuitry controls the electronic switching circuit, after power on delay preset time period of starting shooting, output
The complementary drive pulse signal of the two-way of the default pulsewidth.
Preferably, the Switching Power Supply dipulse pulsewidth limiting circuit is also including controlling circuit and hiccup control electricity complete cycle
Road；
Circuit is controlled according to any one pulse signal detection in the inceptive impulse signal to switch when the complete cycle
When hiccup phenomenon occurs in power supply, hiccup start pulse signal to electronic switching circuit is sent；
It is described hiccup control circuit collect outside control loop useful signal, and by the useful signal send to
The electronic switching circuit；
The electronic switching circuit is according to the hiccup start pulse signal and useful signal generation hiccup control letter
Number, and the hiccup control signal is sent to the hiccup control circuit；
The hiccup control circuit controls the pulsewidth limiting circuit according to the hiccup control signal, so that the pulsewidth
Limiting circuit exports pulse control signal, and the electronic switching circuit selects output channel according to pulse control signal, and output is just
Initial pulse signal.
The present invention solves the problems, such as the pulsewidth limitation of dipulse by pulsewidth limiting circuit and electronic switching circuit, reaches
To not limited by two-way pulse generation source, and the technique effect of the pulsewidth of controlled two-way pulse can be flexibly set.I.e. no matter
It is dipulse that integrated chip is produced, or the dipulse that controller is produced, the present invention can flexibly set controlled double arteries and veins
The pulsewidth of punching.
The present invention limits the width of driving pulse by pulsewidth limiting circuit, so that switching tube is operated in safe current area
In domain, the service life of switching tube is increased, the maintenance cost for reducing switching tube and the reliability that improve Switching Power Supply
Property.
Figure of description
Fig. 1 is the circuit diagram of Switching Power Supply dipulse pulsewidth limiting circuit embodiment 1 of the present invention；
Fig. 2 is the key signal timing diagram of Switching Power Supply dipulse pulsewidth limiting circuit embodiment 1 of the present invention；
Fig. 3 is the circuit diagram of Switching Power Supply dipulse pulsewidth limiting circuit embodiment 2 of the present invention；
Fig. 4 is the flow chart of Switching Power Supply dipulse pulsewidth limiting circuit embodiment 3 of the present invention；
Fig. 5 is the flow chart of Switching Power Supply dipulse pulsewidth limiting circuit embodiment 4 of the present invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used to limit the present invention.
Embodiment 1
Referring to the circuit diagram that Fig. 1 and Fig. 2, Fig. 1 are Switching Power Supply dipulse pulsewidth limiting circuit embodiment 1 of the present invention；Fig. 2
It is the key signal timing diagram of Switching Power Supply dipulse pulsewidth limiting circuit embodiment 1 of the present invention.
In embodiment 1, the invention provides a kind of Switching Power Supply dipulse pulsewidth limiting circuit, it includes that pulsewidth is limited
Circuit 4 and electronic switching circuit 5, the pulsewidth limiting circuit 4 are connected with the electronic switching circuit 5；
There is circuit in the external dipulse of the pulsewidth limiting circuit 4, it is mutual for generating two-way that the dipulse occurs circuit
Symmetrical, the inceptive impulse signal with Dead Time is mended, the pulsewidth limiting circuit 4 is used to be converted to the inceptive impulse signal
The drive pulse signal of the two-way complementation of default pulsewidth, and the pulse control signal of generation is sent to electronic switching circuit 5；
The electronic switching circuit 5 is used to select output channel according to the pulse control signal, by the default pulsewidth
The complementary drive pulse signal output of two-way.
It can be the oscillating circuit that integrated chip (such as 555) is constituted that dipulse occurs circuit in the present invention, or specially
The oscillating circuit that the pwm chip (such as SG3525) of door is constituted, or controller is (for example：DSP) the pulse that control is produced
Generation circuit.If can produce two-way complementary, and there is electricity in the dipulse of the pulse signal with less Dead Time
Road, can realize the present invention, within protection scope of the present invention.
Pulsewidth limiting circuit 4 of the invention occur using dipulse circuit two-way mutual symmetry, with Dead Time just
The Dead Time of initial pulse signal, produces the dipulse gating trigger signal of one fixed width, and dipulse gating triggering is believed
Number send to electronic switching circuit 5.
Further, the Switching Power Supply dipulse pulsewidth limiting circuit also includes power-on reset circuitry 1, and the start is multiple
Position circuit 1 is connected with pulsewidth limiting circuit 4, electronic switching circuit 5 respectively；
The power-on reset circuitry 1 is used to control the electronic switching circuit, after power on delay preset time period of starting shooting,
Export the complementary drive pulse signal of the two-way of the default pulsewidth.
After the present invention is in order to ensure accessory power supply and other control circuit normal works, then export default pulsewidth two
The complementary drive pulse signal in road to switching tube, therefore, export the two of default pulsewidth again after start power on delay preset time period
The complementary drive pulse signal in road.
Further, with the dipulse of outside there is first signal input part and the of circuit in the pulsewidth limiting circuit 4
Binary signal input is connected, and first signal input part is connected with the anode of the first diode, the secondary signal input
Anode with second diode is connected, the 3rd pin of first Schmidt trigger respectively with the moon of the first diode
Pole, the negative electrode of the second diode, it is connected with one end of the second electric capacity through second resistance, and is grounded through second resistance, described the
4th pin of one Schmidt trigger anode respectively with the 3rd diode, the other end through 3rd resistor and the second electric capacity,
Through the 5th pin of 3rd resistor and the second Schmidt trigger, the anode of the 4th diode, the 3rd Schmidt trigger the
Nine pins are connected, and the 5th pin of second Schmidt trigger is connected with the negative electrode of the 3rd diode, and described second applies close
6th pin of special trigger is connected through the grid of the 4th resistance negative electrode respectively with the 4th diode, the first metal-oxide-semiconductor, and described
9th pin of three Schmidt triggers is connected with the anode of the 4th diode, the 8th pin of the 3rd Schmidt trigger
Through the drain electrode respectively with the first metal-oxide-semiconductor of the 5th resistance, one end of the 3rd electric capacity, the 11st pin of the 4th Schmidt trigger,
The hiccup control circuit connection, the former pole ground connection of first metal-oxide-semiconductor, the other end ground connection of the 3rd electric capacity, described the
Tenth pin of four Schmidt triggers is connected with the electronic switching circuit.
The input that dipulse occurs circuit is the anode of pin OUTA and pin OUTB, pin OUTA and the first diode
Connection, pin OUTB is connected with the anode of the second diode, the negative electrode of the negative electrode of the first diode and the second diode, the second electricity
One section of resistance and the 3rd pin connection of the first Schmidt trigger, the other end ground connection of second resistance, the first schmidt trigger
4th pin of device is touched with one end of 3rd resistor, the anode of the 3rd diode, the anode of the 4th diode and the 3rd Schmidt
The 9th pin connection of device is sent out, the other end of 3rd resistor is connected with one end of the second electric capacity, the negative electrode of the 3rd diode and the
The 5th pin connection of two Schmidt triggers, the other end ground connection of the second electric capacity；6th pin of the second Schmidt trigger
One end with the 4th resistance is connected, and the other end of the 4th resistance is connected with the drain electrode of the negative electrode, the first metal-oxide-semiconductor of the 4th diode,
The former pole ground connection of the first metal-oxide-semiconductor, the 8th pin of the 3rd Schmidt trigger is connected with one end of the 5th resistance, the 5th resistance
The other end is connected with the drain electrode of the first metal-oxide-semiconductor, the 11st pin connection of one end, the 4th Schmidt trigger of the 3rd electric capacity,
The other end ground connection of the 3rd electric capacity, the tenth pin of the 4th Schmidt trigger connects with the C pins of electronic switching circuit and B pins
Connect.
The pulse of the first diode and the second diode pair OUTA and OUTB input carries out counnter attack collection, due to OUTA and
There is dead band in the pulse of OUTB inputs input, pulse of the pulsewidth limiting circuit 4 of the invention to OUTA and OUTB inputs is mixed
Close after using, by generating burst pulse after the upset of the first Schmidt trigger, its pulsewidth is equal to Dead Time t, in waveform such as Fig. 2
V1 sequential shown in.
Burst pulse at V1 carries out quick charge by the 3rd the second electric capacity of diode pair, and the second capacitance is smaller, required
Dead Time is shorter.
After burst pulse, the second electric capacity starts electric discharge by 3rd resistor, and voltage V2 is gradually reduced, in waveform such as Fig. 2
V2 sequential.
The time constant t3 that second electric capacity and 3rd resistor determine determines pulse.
Second Schmidt trigger, the 4th resistance, the 4th diode, the 3rd Schmidt trigger, the first metal-oxide-semiconductor and the 5th
Resistance constitutes pulse former, and the impulse waveform after shaping is as shown in the V3 sequential in Fig. 2.The pulsewidth t1 of pulse voltage V3
(t3 ≈ 3*t1, actual value is defined by measurement result).
3rd capacitance very little, for filtering interfering.
4th diode is clamp diode, it is ensured that the low level stability of voltage V1.
By after the upset of the 4th Schmidt trigger, obtaining the certain trigger pulse of pulsewidth, the 4th Schmidt touches voltage V3
Hair device sends the trigger pulse to the C pins and B pins of electronic switching circuit.
Further, the electronic switching circuit 5 has electronic switch, the VEE pins and VSS pins of the electronic switch
And the 4th electric capacity one end ground connection, the VDD pins and INH pins of the electronic switch, the other end of the 4th electric capacity with it is described
Power-on reset circuitry connection, the C pins and B pins of the electronic switch and the 4th Schmidt trigger of pulsewidth limiting circuit
Tenth pin is connected, and A pins and the complete cycle of the electronic switch controls circuit to be connected, the X pins and X0 of the electronic switch
Pin is connected with the hiccup control circuit respectively, Z1 pins and Y1 the pins ground connection of the electronic switch, the electronic switch
Z pins be connected with PDRA, its Y pin is connected with PDRB, and its Z0 pin is connected with OUTA, and its Y0 pin is connected with OUTB.
Dipulse after pulsewidth limitation of the invention is the Z pins and Y pin output driving circuits from electronic switch.
One end ground connection of the VEE pins of electronic switch, the VSS pins of electronic switch and the 4th electric capacity, the VDD of electronic switch
Pin, the other end of the 4th electric capacity connect power supply simultaneously, and the Y1 pins ground connection of electronic switch, the Y0 pins of electronic switch meet OUTB,
The Z1 pins ground connection of electronic switch, the Z0 pins of electronic switch meet OUTA, and the Z pins of electronic switch meet PDRA, the Y of electronic switch
Pin meets PDRB.
When electronic switch C pins and B pins be high level when, electronic switch gating low level be connected to PDRA and
PDRB, conversely, keeping OUTA and OUTB pulses output constant.
What deserves to be explained is, if Switching Power Supply of the invention occur hiccup phenomenon, electronic switch keep OUTA and
OUTB pulses output is constant.
Because C pins and B pins are input into the Pulse Width Control in such as Fig. 2 after the upset of V3 sequential, thus electronic switch is exported
The timing waveform of dipulse as shown in PDRA and PDRB in Fig. 2, wherein, the width of pulse is t2, and meets t2=T-t1,
I.e. output pulse width is limited.
Further, the power-on reset circuitry 1 have a power supply, the power supply respectively with the electronic switching circuit
VDD pins and the 4th electric capacity one end, one end connection of the 5th electric capacity, the other end of the 5th electric capacity respectively with the electronics
The negative electrode connection of the INH pins, the 5th diode of on-off circuit, and through the 6th resistance eutral grounding, the sun of the 5th diode
Pole is grounded.
The input connection power supply of power-on reset circuitry 1, its output end is connected to the electronic switch of electronic switching circuit 5
INH pins, power supply connects one end of the 5th electric capacity,.The other end of the 5th electric capacity and the INH pins of electronic switch, the 6th resistance
One end and the second diode negative electrode connection, the other end ground connection of the 6th resistance, the anode of the 5th diode is also grounded.
5th electric capacity and the 6th resistance constitute differential circuit, the moment of upper electricity, the voltage V6 of the INH pins of electronic switch
Can rise moment, now electronic switch does not work, exported without driving, slowly discharged by the 6th resistance afterwards, voltage V6 declines
To low level, electronic switch is started working, and electronic switch has pulse to export.
5th diode is clamp diode, and voltage V6 is clamped into low level after power down, it is to avoid next power-on reset
Failure.
The present invention solves the problems, such as the pulsewidth limitation of dipulse by pulsewidth limiting circuit 4 and electronic switching circuit 5,
Reach and do not limited by two-way pulse generation source, and the technique effect of the pulsewidth of controlled two-way pulse can be flexibly set.I.e. without
By the dipulse for being integrated chip generation, or the dipulse that controller is produced, the present invention can flexibly set controlled double
The pulsewidth of pulse.
The present invention limits the width of driving pulse by pulsewidth limiting circuit 4, so that switching tube is operated in safe current
In region, the service life of switching tube is increased, the maintenance cost for reducing switching tube and the reliability that improve Switching Power Supply
Property.
Embodiment 2
Referring to Fig. 3, Fig. 3 is the circuit diagram of Switching Power Supply dipulse pulsewidth limiting circuit embodiment 2 of the present invention.
In example 2, the circuit structure with above-described embodiment is essentially identical, and difference is, the Switching Power Supply
Dipulse pulsewidth limiting circuit also including controlling circuit 2 and hiccup control circuit 3 complete cycle, is controlled outside circuit 2 complete cycle
Connect the dipulse and circuit occurs, and be connected with the electronic switching circuit 5；The hiccup control external control loop of circuit 3,
The control loop is used for the useful signal whether detection switch power supply hiccup phenomenon occurs, and the hiccup control circuit 3 is distinguished
It is connected with the pulsewidth limiting circuit 4, electronic switching circuit 5；
The complete cycle controls circuit 2, for being switched by stating any one pulse signal detection in inceptive impulse signal
Whether power supply there is hiccup phenomenon, and generation hiccup start pulse signal；
The hiccup control circuit 3, the useful signal for gathering the control loop, and according to hiccup control signal
The pulsewidth limiting circuit 4 is controlled, so that the pulsewidth limiting circuit 4 output pulse control signal, the electronic switching circuit 5
Output channel is selected according to pulse control signal, inceptive impulse signal is exported；
The electronic switching circuit 5, for according to start pulse signal and useful signal generation hiccup control signal.
Further, controlling circuit 3 complete cycle has the 5th Schmidt trigger, the 5th Schmidt trigger
The first pin be connected with one end of the first electric capacity, and through first resistor be grounded, the second of the 5th Schmidt trigger
Pin is connected with the A pins of the electronic switching circuit, and the 14th pin of the 5th Schmidt trigger is connected with power supply,
The 7th pin ground connection of the 5th Schmidt trigger, the other end and the dipulse of first electric capacity occur the first of circuit
Any one input connection in signal input part and secondary signal input.
Controlling circuit 3 complete cycle includes the first electric capacity, one end of first electric capacity and dipulse occur the OUTA of circuit or
Person OUTB is connected, and the other end of first torch is connected with the first pin of the 5th Schmidt trigger, one end of first resistor,
The other end ground connection of first resistor, the 7th pin ground connection of the first Schmidt trigger, the 14th of the first Schmidt trigger the
Pin is connected with power supply, the A pins of the second pin of the first Schmidt trigger and the electronic switch of electronic switching circuit 5.
First resistor and the first electric capacity constitute differential circuit, and operation principle is as the differential circuit of power-on reset circuitry 1.
Circuit 3 is controlled complete cycle to increased the 5th Schmidt trigger, the 5th Schmidt trigger is to realize input
The upset of narrow pulse signal.When UOTA is detected or OUTB has rising edge, i.e., do not have the hiccups, the electronics of electronic switching circuit 5
The X0 pins and X pins of switch are disconnected, conversely, the X0 pins of electronic switch are connected with X pins, that is, need to carry out hiccup control
System.
Further, the hiccup control circuit includes the second metal-oxide-semiconductor and the 6th Schmidt trigger, and the described 6th applies close
13rd pin of special trigger through the control loop outside the 7th electrical resistance collection useful signal, the 6th schmidt trigger
12nd pin of device is connected with the X pins of the electronic switching circuit, grid and the electronic switch of second metal-oxide-semiconductor
The X0 pins connection of circuit, and through the 6th capacity earth, through the 8th resistance eutral grounding, the former pole of second metal-oxide-semiconductor is grounded, institute
State the 11st pin for draining respectively with the 4th Schmidt trigger of the pulsewidth limiting circuit, the 3rd electricity of the second metal-oxide-semiconductor
One end of appearance, one end of the 5th resistance, the drain electrode connection of the first metal-oxide-semiconductor.
Hiccup controls circuit 3 to gather the useful signal (high level is normal) of external control loop, the electricity of BURST and the 7th
One end connection of resistance, the other end of the 7th resistance is connected with the 13rd pin of the 6th Schmidt trigger, and the 6th Schmidt touches
The 12nd pin for sending out device is connected with the X pins of the electronic switch of electronic switching circuit 5, one end and the 6th electric capacity of the 8th resistance
One end, the grid of the second metal-oxide-semiconductor, the electronic switch of electronic switching circuit X0 pins connection, the other end of the 8th resistance with
The other end connection of the 6th electric capacity, and the other end of the 8th resistance is grounded, the former pole ground connection of the second metal-oxide-semiconductor, the second metal-oxide-semiconductor
Drain electrode is connected with pulsewidth limiting circuit.
When Switching Power Supply occurs in that hiccup phenomenon, signal BURST is low level, is overturn by the 6th Schmidt trigger
Afterwards, in high level, and now, the A pins of electronic switch are also high level, so that the X0 of the electronic switch of electronic switching circuit 5
Pin is connected with X pins, the conducting of the second metal-oxide-semiconductor, and voltage V3 is changed into low level, after the upset of the 4th Schmidt trigger, in electricity high
Flat, final electronic switch keeps output pulse OUTA and OUTB to drive circuit, that is, realize hiccup control.
When hiccup phenomenon occurs in Switching Power Supply, the pulsewidth that dipulse occurs the pulse of circuit is smaller, it is not necessary to carry out
Pulsewidth is limited, and can directly be exported.
The effect of the 6th electric capacity and the 8th resistance is to prevent misleading for the second metal-oxide-semiconductor.
The present invention solves wide-range input voltage and opens by controlling circuit 2 and hiccup control circuit 3 increased complete cycle
The hiccup problem in powered-down source.
For wide-range input voltage Switching Power Supply, when input voltage is higher than rated value, and power supply is unloaded, often there is hiccup
Phenomenon.
Embodiment 3
Referring to Fig. 4, Fig. 4 is the flow chart of Switching Power Supply dipulse pulsewidth limiting circuit embodiment 3 of the present invention.
To achieve the above object, the embodiment of the present invention 3 additionally provides a kind of Switching Power Supply dipulse pulsewidth limiting circuit
There is circuit, pulsewidth limiting circuit, electronic switching circuit in implementation method, the dipulse that is sequentially connected of structure, and respectively with institute
Pulsewidth limiting circuit, the power-on reset circuitry of electronic switching circuit connection are stated, it comprises the following steps；
There is circuit evolving two-way mutual symmetry, the inceptive impulse signal with Dead Time in step S10, dipulse, and will
The inceptive impulse signal is sent to the pulsewidth limiting circuit.
Dipulse occurs after circuit evolving two-way mutual symmetry, the inceptive impulse signal of the Dead Time with very little, then
By two inputs of OUTA and OUTB respectively by inceptive impulse signal output to pulsewidth limiting circuit.
The inceptive impulse signal is converted to step S11, pulsewidth limiting circuit the driving of the two-way complementation of default pulsewidth
Pulse signal, and the pulse control signal of generation is sent to electronic switching circuit.
Step S12, the electronic switching circuit selects output channel according to the pulse control signal for receiving, by institute
State the complementary drive pulse signal output of the two-way of default pulsewidth.
Step S13, the power-on reset circuitry controls the electronic switching circuit, in start power on delay preset time period
Afterwards, the complementary drive pulse signal of the two-way of the default pulsewidth is exported.
The present invention solves the problems, such as the pulsewidth limitation of dipulse by pulsewidth limiting circuit 4 and electronic switching circuit 5,
Reach and do not limited by two-way pulse generation source, and the technique effect of the pulsewidth of controlled two-way pulse can be flexibly set.I.e. without
By the dipulse for being integrated chip generation, or the dipulse that controller is produced, the present invention can flexibly set controlled double
The pulsewidth of pulse.
The present invention limits the width of driving pulse by pulsewidth limiting circuit 4, so that switching tube is operated in safe current
In region, the service life of switching tube is increased, the maintenance cost for reducing switching tube and the reliability that improve Switching Power Supply
Property.
After the present invention is in order to ensure accessory power supply and other control circuit normal works, then export default pulsewidth two
The complementary drive pulse signal in road to switching tube, therefore, export the two of default pulsewidth again after start power on delay preset time period
The complementary drive pulse signal in road.
Embodiment 4
Referring to Fig. 5, Fig. 5 is the flow chart of Switching Power Supply dipulse pulsewidth limiting circuit embodiment 4 of the present invention.
In example 4, with above-described embodiment the step of, is essentially identical, and difference is, the double arteries and veins of the Switching Power Supply
Chong channel limiting circuit wide is also including controlling circuit and hiccup control circuit, the Switching Power Supply dipulse pulsewidth limitation electricity complete cycle
The implementation method on road also comprises the following steps；
Step S20, controls circuit to be examined according to any one pulse signal in the inceptive impulse signal when the complete cycle
When measuring Switching Power Supply appearance hiccup phenomenon, hiccup start pulse signal to electronic switching circuit is sent；
Step S21, the hiccup control circuit collects the useful signal of the control loop of outside, and by effective letter
Number send to the electronic switching circuit；
Step S22, the electronic switching circuit is beaten according to the hiccup start pulse signal and useful signal generation
Belch control signal, and the hiccup control signal is sent to the hiccup control circuit；
Step S23, the hiccup control circuit controls the pulsewidth limiting circuit according to the hiccup control signal, so that
The pulsewidth limiting circuit exports pulse control signal, and the electronic switching circuit is logical according to pulse control signal selection output
Road, exports inceptive impulse signal.
For wide-range input voltage Switching Power Supply, when input voltage is higher than rated value, and power supply is unloaded, often there is hiccup
Phenomenon.
The present invention solves wide-range input voltage and opens by controlling circuit 2 and hiccup control circuit 3 increased complete cycle
The hiccup problem in powered-down source.
The specific embodiment invented has been described in detail above, but it is only used as example, and the present invention is not intended to limit
With specific embodiments described above.For a person skilled in the art, any equivalent modifications carried out to the invention
Or substitute also all among scope of the invention, therefore, the equalization made in the case where the spirit and principles in the present invention scope is not departed from
Conversion and modification, improvement etc., all should be contained within the scope of the invention.
Claims (8)
1. a kind of Switching Power Supply dipulse pulsewidth limiting circuit, it is characterised in that it includes pulsewidth limiting circuit and electronic switch
Circuit, the pulsewidth limiting circuit is connected with the electronic switching circuit；
There is circuit in the external dipulse of pulsewidth limiting circuit, the dipulse occurs circuit to be used to generate two-way complementary pair
Title, the inceptive impulse signal with Dead Time, the pulsewidth limiting circuit are default for the inceptive impulse signal to be converted to
The complementary drive pulse signal of the two-way of pulsewidth, and the pulse control signal of generation is sent to electronic switching circuit；
The electronic switching circuit is used to select output channel according to the pulse control signal, by the two-way of the default pulsewidth
Complementary drive pulse signal output；
The Switching Power Supply dipulse pulsewidth limiting circuit is also including controlling circuit and hiccup control circuit, the complete cycle complete cycle
There is circuit in the external dipulse of phase control circuit, and be connected with the electronic switching circuit；Outside the hiccup control circuit
Control loop is connect, the control loop is used for the useful signal whether detection switch power supply hiccup phenomenon occurs, the hiccup control
Circuit processed is connected with the pulsewidth limiting circuit, electronic switching circuit respectively；
The complete cycle controls circuit, for by any one pulse signal detection Switching Power Supply in the inceptive impulse signal
Whether appearance hiccup phenomenon, and generation hiccup start pulse signal；
The hiccup control circuit, the useful signal for gathering the control loop, and according to hiccup control signal control
The pulsewidth limiting circuit, so that pulsewidth limiting circuit output pulse control signal, the electronic switching circuit is according to arteries and veins
Control signal selection output channel is rushed, inceptive impulse signal is exported；
The electronic switching circuit, for according to start pulse signal and useful signal generation hiccup control signal.
2. Switching Power Supply dipulse pulsewidth limiting circuit according to claim 1, it is characterised in that the Switching Power Supply is double
Pulse limiting circuit also include power-on reset circuitry, the power-on reset circuitry respectively with pulsewidth limiting circuit, electronic cutting
Powered-down road connection；
The power-on reset circuitry is used to control the electronic switching circuit, after power on delay preset time period of starting shooting, output
The complementary drive pulse signal of the two-way of the default pulsewidth.
3. Switching Power Supply dipulse pulsewidth limiting circuit according to claim 2, it is characterised in that the pulsewidth limitation electricity
The first signal input part and secondary signal input that road occurs circuit with the dipulse of outside are connected, first signal input
End is connected with the anode of the first diode, and the secondary signal input is connected with the anode of the second diode, the first Schmidt
3rd pin of trigger negative electrode respectively with the first diode, the negative electrode of the second diode, through second resistance and the second electric capacity
One end connection, and be grounded through second resistance, the 4th pin of first Schmidt trigger respectively with the 3rd diode
Anode, the other end through 3rd resistor and the second electric capacity, the 5th pin through 3rd resistor and the second Schmidt trigger, the
The 9th pin connection of the anode of four diodes, the 3rd Schmidt trigger, the 5th pin of second Schmidt trigger
Negative electrode with the 3rd diode is connected, the 6th pin of second Schmidt trigger through the 4th resistance respectively with the four or two pole
The grid connection of the negative electrode of pipe, the first metal-oxide-semiconductor, the 9th pin of the 3rd Schmidt trigger and the anode of the 4th diode
Connection, the 8th pin of the 3rd Schmidt trigger is through the 5th resistance drain electrode respectively with the first metal-oxide-semiconductor, the 3rd electric capacity
One end, the 11st pin of the 4th Schmidt trigger, hiccup control circuit connection, the former pole of first metal-oxide-semiconductor connects
Ground, the other end ground connection of the 3rd electric capacity, the tenth pin and the electronic switching circuit of the 4th Schmidt trigger
Connection.
4. Switching Power Supply dipulse pulsewidth limiting circuit according to claim 3, it is characterised in that the electronic cutting is powered-down
Road has electronic switch, the VEE pins of the electronic switch and one end ground connection of VSS pins and the 4th electric capacity, the electronics
The VDD pins and INH pins of switch, the other end of the 4th electric capacity are connected with the power-on reset circuitry, the C of the electronic switch
Pin and B pins are connected with the tenth pin of the 4th Schmidt trigger of pulsewidth limiting circuit, the A pins of the electronic switch
It is connected with circuit is controlled complete cycle, the X pins and X0 pins of the electronic switch are connected with the hiccup control circuit respectively, institute
Z1 pins and Y1 the pins ground connection of electronic switch are stated, the Z pins of the electronic switch are connected with PDRA, and its Y pin connects with PDRB
Connect, its Z0 pin is connected with OUTA, its Y0 pin is connected with OUTB.
5. Switching Power Supply dipulse pulsewidth limiting circuit according to claim 4, it is characterised in that the power-on reset electricity
Road have a power supply, the power supply respectively with the VDD pins and the 4th electric capacity one end, the 5th electric capacity of the electronic switching circuit
One end connection, the other end of the 5th electric capacity INH pins, the moon of the 5th diode respectively with the electronic switching circuit
Pole connects, and through the 6th resistance eutral grounding, the plus earth of the 5th diode.
6. Switching Power Supply dipulse pulsewidth limiting circuit according to claim 5, it is characterised in that control complete cycle
Circuit has the 5th Schmidt trigger, and the first pin of the 5th Schmidt trigger is connected with one end of the first electric capacity,
And be grounded through first resistor, the second pin of the 5th Schmidt trigger connects with the A pins of the electronic switching circuit
Connect, the 14th pin of the 5th Schmidt trigger is connected with power supply, the 7th pin of the 5th Schmidt trigger
Ground connection, appoints in the other end of first electric capacity and first signal input part and secondary signal input of dipulse generation circuit
One input connection of meaning.
7. Switching Power Supply dipulse pulsewidth limiting circuit according to claim 6, it is characterised in that the hiccup control electricity
Road includes the second metal-oxide-semiconductor and the 6th Schmidt trigger, and the 13rd pin of the 6th Schmidt trigger is through the 7th resistance
The useful signal of the control loop outside collection, the 12nd pin of the 6th Schmidt trigger is powered-down with the electronic cutting
The X pins connection on road, the grid of second metal-oxide-semiconductor is connected with the X0 pins of the electronic switching circuit, and through the 6th electricity
Hold ground connection, through the 8th resistance eutral grounding, the former pole of second metal-oxide-semiconductor is grounded, the drain electrode of second metal-oxide-semiconductor respectively with the arteries and veins
11st pin, one end of the 3rd electric capacity, one end, first of the 5th resistance of the 4th Schmidt trigger of limiting circuit wide
The drain electrode connection of metal-oxide-semiconductor.
8. a kind of implementation method of Switching Power Supply dipulse pulsewidth limiting circuit, it is characterised in that build the double arteries and veins being sequentially connected
Punching occur circuit, pulsewidth limiting circuit, electronic switching circuit, and respectively with the pulsewidth limiting circuit, electronic switching circuit
The power-on reset circuitry of connection, it comprises the following steps：
There is circuit evolving two-way mutual symmetry, the inceptive impulse signal with Dead Time in dipulse, and by the inceptive impulse
Signal is sent to the pulsewidth limiting circuit；
The inceptive impulse signal is converted to pulsewidth limiting circuit the drive pulse signal of the two-way complementation of default pulsewidth, and will
The pulse control signal of generation is sent to electronic switching circuit；
The electronic switching circuit selects output channel according to the pulse control signal for receiving, by the default pulsewidth
The complementary drive pulse signal output of two-way；
The power-on reset circuitry controls the electronic switching circuit, and after power on delay preset time period of starting shooting, output is described
The drive pulse signal of the two-way complementation of default pulsewidth；
Circuit is controlled to be occurred according to any one pulse signal detection in the inceptive impulse signal to Switching Power Supply when complete cycle
During hiccup phenomenon, hiccup start pulse signal to electronic switching circuit is sent；
Hiccup control circuit collects the useful signal of the control loop of outside, and the useful signal is sent to the electronics
On-off circuit；
The electronic switching circuit generates hiccup control signal according to the hiccup start pulse signal and the useful signal, and
The hiccup control signal is sent to the hiccup control circuit；
The hiccup control circuit controls the pulsewidth limiting circuit according to the hiccup control signal, so that the pulsewidth is limited
Circuit output pulse control signal, the electronic switching circuit selects output channel according to pulse control signal, exports initial arteries and veins
Rush signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410740801.1A CN104539141B (en) | 2014-12-08 | 2014-12-08 | Switching Power Supply dipulse pulsewidth limiting circuit and its implementation |
| PCT/CN2015/088098 WO2016090959A1 (en) | 2014-12-08 | 2015-08-26 | Switching power supply double-pulse pulse width constraint circuit and implementation method therefor |
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| CN201410740801.1A CN104539141B (en) | 2014-12-08 | 2014-12-08 | Switching Power Supply dipulse pulsewidth limiting circuit and its implementation |
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| CN104539141B true CN104539141B (en) | 2017-07-07 |
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| CN104539141B (en) * | 2014-12-08 | 2017-07-07 | 深圳市科陆电子科技股份有限公司 | Switching Power Supply dipulse pulsewidth limiting circuit and its implementation |
| CN105306026B (en) * | 2015-11-05 | 2018-01-09 | 中国科学院电工研究所 | A kind of double pulse generator of turnable pulse width |
| CN106100627B (en) * | 2016-07-13 | 2023-02-03 | 中国电子科技集团公司第三十八研究所 | But impulse response's switching on and shutting down branch puts control circuit |
| CN109412563B (en) * | 2018-12-04 | 2023-09-05 | 江苏航天大为科技股份有限公司 | Two-way wheel patrol pulse width frequency variable trigger signal generation controller |
| CN109412568B (en) * | 2019-01-03 | 2024-04-02 | 歌尔科技有限公司 | Reset circuit for switching on and switching off |
| CN109995386B (en) * | 2019-03-29 | 2023-09-29 | 成都四威功率电子科技有限公司 | Radio frequency signal output device |
| CN112816804B (en) * | 2019-11-15 | 2024-04-26 | 中车株洲电力机车研究所有限公司 | Pulse testing device with high integration level |
| CN113534690B (en) * | 2020-04-14 | 2022-11-15 | Tcl新技术（惠州）有限公司 | Intelligent device, starting control circuit and control method thereof |
| CN111970886B (en) * | 2020-08-06 | 2022-05-17 | 贵州振华群英电器有限公司（国营第八九一厂） | Analog deputy device for double-redundancy transient pulse input |
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| CN101661302A (en) * | 2009-09-27 | 2010-03-03 | 上海大学 | PWM pulse wave generation method and system on microcontroller |
| CN103281062A (en) * | 2013-06-17 | 2013-09-04 | 深圳威迈斯电源有限公司 | IGBT driving circuit with pulse width limitations and implementation method thereof |
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| JP2002325436A (en) * | 2001-04-27 | 2002-11-08 | Origin Electric Co Ltd | Converter circuit |
| JP2006148987A (en) * | 2004-11-16 | 2006-06-08 | Matsushita Electric Ind Co Ltd | Switching regulator circuit |
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| CN202435253U (en) * | 2011-11-03 | 2012-09-12 | 美的集团有限公司 | IGBT drive integrated device |
| CN104135155B (en) * | 2014-08-13 | 2016-08-17 | 永康市帝普特科技有限公司 | Pulse width limiting circuit of inverter |
| CN104539141B (en) * | 2014-12-08 | 2017-07-07 | 深圳市科陆电子科技股份有限公司 | Switching Power Supply dipulse pulsewidth limiting circuit and its implementation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101661302A (en) * | 2009-09-27 | 2010-03-03 | 上海大学 | PWM pulse wave generation method and system on microcontroller |
| CN103281062A (en) * | 2013-06-17 | 2013-09-04 | 深圳威迈斯电源有限公司 | IGBT driving circuit with pulse width limitations and implementation method thereof |
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| WO2016090959A1 (en) | 2016-06-16 |
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