CN108319318A - The controllable Switching Power Supply and method of amplitude is fallen and risen to a kind of output voltage moment - Google Patents
The controllable Switching Power Supply and method of amplitude is fallen and risen to a kind of output voltage moment Download PDFInfo
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- CN108319318A CN108319318A CN201810308587.0A CN201810308587A CN108319318A CN 108319318 A CN108319318 A CN 108319318A CN 201810308587 A CN201810308587 A CN 201810308587A CN 108319318 A CN108319318 A CN 108319318A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005070 sampling Methods 0.000 claims abstract description 13
- 239000004065 semiconductor Substances 0.000 claims description 31
- 230000005611 electricity Effects 0.000 claims description 7
- 230000000630 rising effect Effects 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Physics & Mathematics (AREA)
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- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of output voltage moment and falls and rise to the controllable Switching Power Supply and method of amplitude, including controller, power stage module, PWM generator, output voltage sampling module and threshold values circuit, threshold values circuit is coupled in the output end of output voltage sampling module and the input terminal of controller, threshold values circuit configuration has overshoot threshold values VH and undershoot threshold values VL, when output voltage Vo falls, and sampled voltage Vs is caused to be more than the undershoot threshold values VL of setting, threshold values circuit makes the reverse input end of controller move zero potential to, when output voltage Vo, which rises to, causes sampled voltage Vs more than threshold values VH is risen to, threshold values circuit makes the reverse input end of controller set height；Realization is not influencing existing feedback control loop parameter, effectively reduces the output voltage amplitude caused by Switching Power Supply load sudden change and is mutated, and ensures that Switching Power Supply load is not damaged and prolongs the service life by controllable output voltage amplitude size.
Description
Technical field
The present invention relates to field of switch power, more particularly to fall and rise to that amplitude is controllable opens a kind of output voltage moment
Powered-down source, and its realize method.
Background technology
Switching Power Supply is a kind of common power-supply device, can be led when switched power output is supported on unexpected load or unload
Output voltage moment is caused to fall and rise to, the transient changing of this voltage will have a direct impact on the performance and used life of connection load,
The damage of load equipment is caused when serious.
Currently, it is to improve the switching frequency of PWM derailing switches to improve the technical problem common scheme one, to improve loop response
Speed, but as the raising of the switching frequency of PWM derailing switches can increase the loss of power stage module switch pipe and then influence whole
The problem of efficiency of machine, second is that by improving the response speed of feedback control loop, but complicated loop design parameter can be involved
The problem of with being difficult to accurately debug in engineering.
Invention content
The object of the present invention is to provide a kind of output voltage moments to fall and rise to the controllable Switching Power Supply of amplitude and in fact
Existing method is not influencing loop parameter design and is not improving switch additionally by the variation of the output voltage of detection output
In the case of frequency, solve because that output voltage moment can be caused to fall and rise to when loading because of unexpected load or unload, direct shadow
Ring the performance and used life of connection load, and it is serious when the problem of causing the damage of load equipment.
To achieve the goals above, the technical solution of the present invention is to provide a kind of output voltage moments to fall and rise to amplitude
Controllable Switching Power Supply, including controller, power stage module, PWM generator and output voltage sampling module, controller receiving are set
Sampled voltage Vs between definite value Vref and output voltage sampling module acquisition power stage module and load after output voltage Vo,
Output voltage Ve goes control PWM generator, PWM generator to regulate and control power stage module, further includes threshold values circuit, the coupling of threshold values circuit
In the output end of output voltage sampling module and the input terminal of controller, threshold values circuit configuration has overshoot threshold values VH and undershoot threshold values
VL, when output voltage VO is fallen, and sampled voltage VS is caused to be more than the undershoot threshold values VL of setting, threshold values circuit makes the anti-of controller
Zero potential is moved to input terminal, and the output voltage Ve of controller is increased with positive saturation voltage, causes to adopt when output voltage Vo rises to
Sample voltage Vs is more than when rising to threshold values VH, and threshold values circuit makes the reverse input end of controller set height, the output voltage Ve of controller
Reduced with negative saturation voltage.
The threshold values circuit includes the first, second comparator, compares with the first gate circuit of first comparator coupling, with second
Compared with the second gate circuit of device coupling, the input terminal of the first, second comparator receives sampled voltage Vs, and the first, second gate circuit is defeated
Go out to terminate controller input terminal.
The threshold values circuit includes the metal-oxide-semiconductor Q2 of P-channel, the metal-oxide-semiconductor Q1 of N-channel and resistance R3, the first gate circuit be with
NOT gate, the second gate circuit are nor gate, the reverse input end of first comparator, the positive input of the second comparator and output electricity
The output end connection of sampling module, the output end of the second comparator is pressed to be connect with the grid of metal-oxide-semiconductor Q2 through nor gate, first compares
The output end of device is connect through NAND gate with the grid of metal-oxide-semiconductor Q1, the leakage after the drain electrode series resistor R3 of metal-oxide-semiconductor Q2 with metal-oxide-semiconductor Q1
Pole is connected with the reverse input end of controller, and the source electrode of metal-oxide-semiconductor Q2 receives setting value Vref, and the source electrode of metal-oxide-semiconductor Q1 connects power supply
Cathode.
Controller uses error amplifier.
Resistance R1 of the positive input of controller through concatenation receives setting value Vref, and the reverse input end of controller is through string
The resistance R2 connect receives sampled voltage Vs, and the resistance value of resistance R1, resistance R2 and resistance R3 meet R1=R2=100*R3.
Technical solution of the present invention, which also provides, a kind of realizing that the controllable Switching Power Supply of amplitude is fallen and risen to output voltage moment
Method, include the following steps：
Output voltage Vo obtains sampled voltage Vs between acquisition power stage module and load；
Mono- tunnels sampled voltage Vs are input to the input terminal of controller, and another way is input to the input terminal of threshold values circuit；
It is more than threshold values electricity respectively to fall the value for either rising to and sampled voltage Vs being caused to fall or rise to when output voltage Vo moments
When the setting undershoot threshold values VL on road either overshoots valve VH values threshold values circuit trigger controller rapidly respectively with positive saturation voltage or
Negative saturation voltage output, and then output voltage Vo is enable to be pulled back to normal value rapidly.
The value that sampled voltage Vs falls or rises to when output voltage moment, which is fallen, either to be risen to is setting undershoot threshold values
In VL and overshoot threshold values VH, threshold values circuit will not act, and controller carries out normal loop according to the Vs of input terminal and adjusts work.
Output voltage moment falls the controllable step of amplitude, when Switching Power Supply load transients load, output voltage Vo moments
Fall, when the undershoot threshold values VL set in output voltage Vo falls more than threshold values circuit, connected NAND gate can be triggered at this time
High level is exported, the metal-oxide-semiconductor Q1 being connected with NAND gate is made to be connected and moves the reverse input end of error amplifier to zero potential, this
Carving the output voltage Ve of error amplifier and being increased rapidly with positive saturation voltage promotes PWM generator to become larger rapidly, and then exports electricity
Pressure Vo is promptly restored to normal value from undershoot threshold values VL values are dropped into；
Output voltage moment rises to the controllable step of amplitude, and when Switching Power Supply load transients unload, output voltage Vo moments rise to,
When the sampled voltage Vs of error amplifier reverse input end increases above overshoot threshold values VH, connected nor gate can be triggered at this time
Low level is exported, the metal-oxide-semiconductor Q2 conductings that AND OR NOT gate is connected are made and by the reverse input end high potential of error amplifier, is missed this moment
The output voltage Ve of poor amplifier is reduced rapidly with negative saturation voltage promotes PWM generator to become smaller rapidly, and then output voltage Vo
Threshold values VH values are promptly restored to normal value from rising to overshooting.
Output voltage Vo falls amplitude and rises to the mistake that amplitude is equal to setting equal to undershoot the threshold values VL, output voltage Vo of setting
Rush threshold values VH.
After the connected metal-oxide-semiconductor Q2 conductings of nor gate, setting value Vref voltages are superimposed upon error amplifier by resistance R3
Reverse input end, so that the reverse input end of error amplifier is set height.
The present invention falls minimum value VMIN, output voltage Vo of the present invention and has fallen DELTVL small compared with the existing technology, phase
Maximum value VMAX, output voltage Vo of the present invention are risen to for the prior art and risen to DELTVH small, when Switching Power Supply load is unexpected
Variation is when causing output voltage Vo to be less than the overshoot threshold values VH and undershoot threshold values VL values of setting, then the present invention can participate in and valve
It is worth the normal loop work of circuit in parallel, so technical solution of the present invention does not influence loop parameter, while can effectively reduces
The amplitude that output voltage is mutated caused by load sudden change.
The beneficial effects of the invention are as follows existing feedback control loop parameter is not being influenced, effectively reduce because Switching Power Supply load is prominent
Output voltage amplitude caused by change is mutated, and ensured by controllable output voltage amplitude size by Switching Power Supply load not by
It damages and prolongs the service life.
Description of the drawings
Fig. 1 is the principle schematic diagram of Switching Power Supply of the present invention；
Fig. 2 is waveform diagram of the prior art Switching Power Supply because of load sudden change output voltage Vo；
Fig. 3 is waveform diagram of the Switching Power Supply of the present invention because of load sudden change output voltage Vo.
Specific implementation mode
The preferred embodiment that the invention will now be described in detail with reference to the accompanying drawings.
Embodiment is as shown in Figure 1, Figure 2 and Figure 3, and Vref is the setting value of controller, and sampled voltage Vs is that output voltage is adopted
The output voltage values of egf block, output voltage Ve are the output voltage values of error amplifier, overshoot threshold values VH and undershoot threshold values VL
It is the threshold value setting value for rising to and falling of output voltage Vo respectively, resistance R1=R2=100*R3, Vin are power stage modules
Input, output voltage Vo is the output voltage of power stage module.
In the prior art when load transients load, output voltage Vo can fall moment, i.e. sampled voltage Vs is gradually reduced
It being gradually risen to limit minimum value VMIN, output voltage Ve and PWM generator output is promoted to become larger, output voltage Vo becomes larger,
Output voltage Vo in this way can be restored to normal value from the minimum value fallen, equally when load transients unload, output voltage Vo meetings
Moment rises to, i.e. sampled voltage Vs gradually increases to ultimate maximum VMAX, and output voltage Ve, which is gradually reduced, promotes PWM generator
Output becomes smaller, and output voltage Vo is tapered into, and such output voltage Vo can be restored to normal value output electricity from the maximum value risen to
Pressure value.
The present embodiment provides a kind of output voltage moments to fall and rise to the controllable Switching Power Supply of amplitude, the Switching Power Supply
Include controller, power stage module, PWM generator and the output voltage sampling module using error amplifier, controller is just
Receive setting value Vref to resistance R1 of the input terminal through concatenation, resistance R2 of the reverse input end through concatenation of controller receives output
Voltage sample module acquires the sampled voltage Vs after output voltage Vo, the output voltage of controller between power stage module and load
Ve removes control PWM generator, and the loaded power stage module of PWM generator control strip, further includes threshold values circuit, threshold values circuit is simultaneously
It is associated in the output end of output voltage sampling module and the reverse input end of controller, threshold values circuit configuration has overshoot threshold values VH under
Threshold values VL is rushed, when output voltage Vo falls the undershoot threshold values VL more than setting, threshold values circuit makes the reverse input end of controller
Move zero potential to, the output voltage Ve of controller is increased with positive saturation voltage, when output voltage Vo rises to more than overshoot threshold values VH
When, threshold values circuit makes the reverse input end high potential of controller, the output voltage Ve of controller reduce with negative saturation voltage.
The threshold values circuit includes the metal-oxide-semiconductor Q2 of P-channel, the metal-oxide-semiconductor Q1 of N-channel, nor gate, NAND gate, second compares
Device, first comparator and resistance R3, the reverse input end of first comparator, the second comparator positive input and output voltage
The output end of sampling module connects, and the output end of the second comparator is connect through nor gate with the grid of metal-oxide-semiconductor Q2, first comparator
Output end connect with the grid of metal-oxide-semiconductor Q1 through NAND gate, the drain electrode after the drain electrode series resistor R3 of metal-oxide-semiconductor Q2 with metal-oxide-semiconductor Q1
It is connected with the reverse input end of controller, the source electrode of metal-oxide-semiconductor Q2 receives setting value Vref, and the source electrode connection power supply of metal-oxide-semiconductor Q1 is negative
Pole.
The present embodiment also provides a kind of method for realizing that output voltage moment falls and rise to the controllable Switching Power Supply of amplitude,
When load transients load, output voltage Vo can fall moment, i.e. sampled voltage Vs is gradually decrease to limit minimum value VMIN,
The present embodiment is in real time detected output voltage Vo during this, when Voltage Drop is more than the undershoot threshold values VL of setting, this
When can trigger NAND gate output high level, while N-channel MOS pipe Q1 conducting and moving error amplifier reverse input end to zero electricity
Position, output voltage Ve is increased rapidly with positive saturation voltage this moment promotes PWM to become larger rapidly, and output voltage Vo becomes larger rapidly, in this way
Output voltage Vo can be from normal value be promptly restored to, relative to the limit minimum value VMIN value electricity when dropping into undershoot threshold values VL values
Pressure has fallen DELTVL values small.
Equally when load transients unload, output voltage Vo can rise to moment, i.e. sampled voltage Vs was gradually increased above
When rushing threshold values VH, nor gate output low level can be triggered at this time, while P-channel metal-oxide-semiconductor Q2 conducting and by setting value Vref voltages
It is superimposed upon error amplifier reverse input end by R3, output voltage Ve is reduced rapidly with negative saturation voltage this moment promotes PWM fast
Speed becomes smaller, and output voltage Vo becomes smaller rapidly, and such output voltage Vo can be promptly restored to from the when of overshooting threshold values VH values is risen to
Normal value has risen to DELTVH values small relative to ultimate maximum VMAX threshold voltages.When load suddenly change causes output voltage
When being less than the overshoot threshold values VH and undershoot threshold values VL values of setting, only normal loop work can be participated in.
The present embodiment does not influence loop parameter, while can effectively reduce what the output voltage caused by load sudden change was mutated
Amplitude, and then ensure that Switching Power Supply load is not damaged and prolongs the service life.
Claims (9)
1. the controllable Switching Power Supply of amplitude, including controller, power stage module, PWM are fallen and risen to a kind of output voltage moment
Generator and output voltage sampling module, controller receive setting value Vref and output voltage sampling module acquisition power stage mould
Sampled voltage Vs between block and load after output voltage Vo, output voltage Ve go control PWM generator, PWM generator regulation and control
Power stage module, it is characterised in that：Further include threshold values circuit, threshold values circuit be coupled in output voltage sampling module output end and
The input terminal of controller, threshold values circuit configuration have overshoot threshold values VH and undershoot threshold values VL, cause to sample when output voltage Vo falls
When voltage Vs is more than the undershoot threshold values VL of setting, threshold values circuit makes the reverse input end of controller move zero potential to, controller
Output voltage Ve is increased with positive saturation voltage, when output voltage Vo, which rises to, causes sampled voltage Vs more than threshold values VH is risen to, valve
Value circuit makes the reverse input end of controller set height, and the output voltage Ve of controller is reduced with negative saturation voltage.
2. the controllable Switching Power Supply of amplitude, feature are fallen and risen to a kind of output voltage moment according to claim 1
It is：The threshold values circuit includes the first, second comparator, is coupled with first comparator the first gate circuit, compared with second
The input terminal of second gate circuit of device coupling, the first, second comparator receives sampled voltage Vs, the output of the first, second gate circuit
Terminate controller input terminal.
3. the controllable Switching Power Supply of amplitude, feature are fallen and risen to a kind of output voltage moment according to claim 2
It is：The threshold values circuit includes the metal-oxide-semiconductor Q2 of P-channel, the metal-oxide-semiconductor Q1 of N-channel and resistance R3, the first gate circuit be with it is non-
Door, the second gate circuit be nor gate, the reverse input end of first comparator, the second comparator positive input and output voltage
The output end of sampling module connects, and the output end of the second comparator is connect through nor gate with the grid of metal-oxide-semiconductor Q2, first comparator
Output end connect with the grid of metal-oxide-semiconductor Q1 through NAND gate, the drain electrode after the drain electrode series resistor R3 of metal-oxide-semiconductor Q2 with metal-oxide-semiconductor Q1
It is connected with the reverse input end of controller, the source electrode of metal-oxide-semiconductor Q2 receives setting value Vref, and the source electrode connection power supply of metal-oxide-semiconductor Q1 is negative
Pole.
4. the controllable Switching Power Supply of amplitude is fallen and risen to a kind of output voltage moment according to claim 1,2 or 3,
It is characterized in that：Controller uses error amplifier.
5. the controllable Switching Power Supply of amplitude, feature are fallen and risen to a kind of output voltage moment according to claim 3
It is：Resistance R1 of the positive input of controller through concatenation receives setting value Vref, and the reverse input end of controller is through concatenation
Resistance R2 receive sampled voltage Vs, the resistance value of resistance R1, resistance R2 and resistance R3 meet R1=R2=100*R3.
6. a kind of realizing that the controllable switch of amplitude is fallen and risen to output voltage moment as described in any one of claims 1 to 3
The method of power supply, it is characterised in that include the following steps：
Output voltage Vo obtains sampled voltage Vs between acquisition power stage module and load；
Mono- tunnels sampled voltage Vs are input to the input terminal of controller, and another way is input to the input terminal of threshold values circuit；
It is more than threshold values electricity respectively to fall the value for either rising to and sampled voltage Vs being caused to fall or rise to when output voltage Vo moments
When the setting undershoot threshold values VL on road either overshoots valve VH values threshold values circuit trigger controller rapidly respectively with positive saturation voltage or
Negative saturation voltage output, and then output voltage Vo is enable to be pulled back to normal value rapidly;
When output voltage moment, which is fallen, either to be risen to sampled voltage Vs fall or the value that rises in setting undershoot threshold values VL and
It overshoots in threshold values VH, threshold values circuit will not act, and controller carries out normal loop according to the Vs of input terminal and adjusts work.
7. a kind of side realizing that a kind of output voltage moment as described in right 6 falls and rise to the controllable Switching Power Supply of amplitude
Method, it is characterised in that include the following steps：
Output voltage moment falls the controllable step of amplitude, and when Switching Power Supply load transients load, output voltage Vo moments are fallen,
When so that sampled voltage Vs being fallen more than the undershoot threshold values VL set in threshold values circuit, connected NAND gate output can be triggered at this time
High level makes the metal-oxide-semiconductor Q1 being connected with NAND gate be connected and moves the reverse input end of error amplifier to zero potential, misses this moment
The output voltage Ve of poor amplifier is increased rapidly with positive saturation voltage promotes PWM generator to become larger rapidly, and then output voltage Vo
It is promptly restored to normal value from undershoot threshold values VL values are dropped into；
Output voltage moment rises to the controllable step of amplitude, and when Switching Power Supply load transients unload, output voltage Vo moments rise to,
When so that sampled voltage Vs increasing above overshoot threshold values VH, connected nor gate output low level can be triggered at this time, makes and-or inverter
The connected metal-oxide-semiconductor Q2 of door is connected and the reverse input end of error amplifier is set height, this moment the output voltage Ve of error amplifier
Being reduced rapidly with negative saturation voltage promotes PWM generator to become smaller rapidly, and then output voltage Vo threshold values VH values from rising to overshooting
It is promptly restored to normal value.
8. the method that the controllable Switching Power Supply of amplitude is fallen and risen to a kind of output voltage moment according to claim 6,
It is characterized in that：Output voltage Vo falls amplitude and rises to amplitude equal to setting equal to undershoot the threshold values VL, output voltage Vo of setting
Overshoot threshold values VH.
9. the method that the controllable Switching Power Supply of amplitude is fallen and risen to a kind of output voltage moment according to claim 7,
It is characterized in that：After the connected metal-oxide-semiconductor Q2 conductings of nor gate, setting value Vref voltages are superimposed upon error amplification by resistance R3
The reverse input end of device makes the reverse input end of error amplifier set height.
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| CN201810308587.0A CN108319318B (en) | 2018-04-09 | 2018-04-09 | Switching power supply and method with controllable output voltage instantaneous drop and jump amplitude |
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| CN201810308587.0A CN108319318B (en) | 2018-04-09 | 2018-04-09 | Switching power supply and method with controllable output voltage instantaneous drop and jump amplitude |
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| CN108319318B CN108319318B (en) | 2024-04-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108808628A (en) * | 2018-08-27 | 2018-11-13 | 艾乐德电子（南京）有限公司 | A kind of test power supply with telemetry function |
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| US9800164B1 (en) * | 2016-07-20 | 2017-10-24 | Suzhou Poweron IC Design Co., Ltd | Compensation circuit for constant output voltage |
| US9806617B1 (en) * | 2016-09-09 | 2017-10-31 | Dialog Semiconductor (Uk) Limited | Switch mode power converter with overshoot and undershoot transient control circuits |
| CN107342678A (en) * | 2017-08-29 | 2017-11-10 | 成都雷电微力科技有限公司 | A kind of Switching Power Supply output overshoot suppression circuit and Switching Power Supply |
| CN207965720U (en) * | 2018-04-09 | 2018-10-12 | 艾乐德电子（南京）有限公司 | The controllable Switching Power Supply of amplitude is fallen and risen to a kind of output voltage moment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808628A (en) * | 2018-08-27 | 2018-11-13 | 艾乐德电子（南京）有限公司 | A kind of test power supply with telemetry function |
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