CN106230235B - A kind of circuit for eliminating abrupt voltage wave - Google Patents
A kind of circuit for eliminating abrupt voltage wave Download PDFInfo
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- CN106230235B CN106230235B CN201610650046.7A CN201610650046A CN106230235B CN 106230235 B CN106230235 B CN 106230235B CN 201610650046 A CN201610650046 A CN 201610650046A CN 106230235 B CN106230235 B CN 106230235B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention provides a kind of circuits of elimination abrupt voltage wave for circuit voltage surging technology for eliminating field, comprising: power supply module, power conversion module and master chip control module；Further include: single chip control module and enabled conducting control module；The single chip control module is used to control the time of the enabled conducting control module be connected with disconnection and its conducting and disconnection.Implement technical solution provided by the invention, the abrupt voltage wave of the master chip control module output can be eliminated by increasing single chip control module and enabled conducting control module by the periphery to the power conversion module, to be supplied to the clean burning voltage of the load blocks, it ensure that the integrality of signal, keep circuit function more stable, product quality and stability are improved, production fraction defective is reduced.
Description
Technical field
The present invention relates to circuit voltage surging technology for eliminating field more particularly to a kind of circuits for eliminating abrupt voltage wave.
Background technique
Present electronic product is more and more, and technology is more and more mature, but be much not easy to be found in development process
Problem is also not within minority, and sometimes one voltage pulse, a voltage overshoot, an abrupt voltage wave can all cause the power supply of load end
Unstable unclean with signal, last signal integrity is very poor, and functional lability causes client to complain.
For example, having power supply module in the general circuit for load supplying, for circuit part component and own
Load supplying；Power conversion module, burning voltage needed for power supply is converted into load blocks；It is additionally provided in circuit
One master chip control module, for enabling power conversion module correctly to export to one enabled level of power conversion module
Voltage needed for load, begins to work after load obtains relevant voltage.
There is theoretically no problems for above circuit design, but find after voltage when test load powers on: opening
The obtained voltage of momentary load for beginning to be powered has the surging without any effect, this unwanted voltage surging go out current moment can be right
The work of load causes influence very serious.By verifying and testing, the appearance of this surging is due to master chip control module
The moment started power up, before software program does not start, (general I/O mouthfuls in itself in IC for module I/O mouthfuls of the high level output
Inside is all the pull-up resistor for having one tens of thousands of ohm) it is uncontrollable, so master chip control module will export one
High level causes power conversion module to export a useless high level surging to power conversion module, leads to the power supply of load
Power supply is unstable and dysfunction occurs.
Summary of the invention
The present invention provides a kind of circuit for eliminating abrupt voltage wave, solves and causes to bear because that directly can not eliminate abrupt voltage wave
Carry the technical problem of power supply instability, loading functional exception.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of circuit for eliminating abrupt voltage wave, comprising:
Power supply module, it is described for the fixed voltage inputted from fixed voltage input terminal to be transformed to variable voltage
Variable voltage is exported from the first voltage of transformation output end, the second voltage of transformation output end；
Power conversion module, equipped with the first voltage input terminal connecting with the first voltage of transformation output end, being used for will
The variable voltage is adjusted to burning voltage, and the burning voltage is exported from first voltage output end；It is additionally provided with shunt capacitance end
The enable end and；
Master chip control module is used for equipped with the second voltage input terminal connecting with the second voltage of transformation output end
Enabled level signal is provided for the power conversion module, the enabled level signal is exported by enabled output end；
Load circuit module, the tertiary voltage input being connect equipped with the first voltage output end with the power conversion module
End；
It is characterized by further comprising:
Single chip control module, equipped with connect with the second voltage of transformation output end the 4th voltage input end, outside
Power supply input terminal, level control output end；
Enabled conducting control module, equipped with the control signal input being connect with the level control output end, with it is described
The enable signal input terminal and connect with the enable end of the power conversion module that the enabled output end of master chip control module connects
The enable signal output end connect；
Further, the single chip control module be used for control it is described it is enabled conducting control module conducting and disconnect and
The time with disconnection is connected in it.
Further, the first voltage of transformation output end of the power supply module, the second voltage of transformation output end according to
The voltage of the power conversion module and master chip control module or single chip control module requires output different voltages.
Further, the enabled output end of the main core control module is that high level enables output end；The power supply conversion
The enable end of module is high level enable end.
Further, the enabled conducting control module is equipped with NPN type triode and P ditch metal-oxide-semiconductor.
Further, the base stage of the NPN type triode connects the level control output of the single chip control module
End, the collector of the NPN type triode connect the grid of the P ditch metal-oxide-semiconductor, and the source electrode of the P ditch metal-oxide-semiconductor connects the master
The enabled output end of chip control module, the drain electrode of the P ditch metal-oxide-semiconductor connects the enable end of the power conversion module.
Further, the first connection of the source electrode connection of P ditch metal-oxide-semiconductor first resistor and first capacitor in parallel
End, is connected with second resistance between first connecting pin and the enabled output end of the master chip control module；The P ditch
The second connection end of the grid connection of the metal-oxide-semiconductor in parallel first resistor and first capacitor, second linkage section with it is described
3rd resistor is connected between the collector of NPN type triode.
Further, it is parallel with the second capacitor and third capacitor between the first voltage output end and shunt capacitance end,
And shunt capacitance end is grounded；One end of tertiary voltage input terminal connection the 4th capacitor and the 4th resistance in parallel, it is described simultaneously
4th capacitor of connection and the other end of the 4th resistance are grounded；The second voltage of transformation output end and the 4th voltage input end
Between be connected with the 5th resistance；The first voltage input terminal connects one end of the 5th capacitor, the other end of the 5th capacitor
Ground connection；The enable end of the power conversion module connects one end of the 6th capacitor, the other end ground connection of the 6th capacitor.
Implement technical solution provided by the invention, is increased by the periphery of the enabled output end to the master chip control module
Add single chip control module and enabled conducting control module that can eliminate the abrupt voltage wave of the power conversion module output, to mention
The clean burning voltage of load circuit module is supplied, the integrality of signal is ensure that, keeps entire circuit function more stable, to mention
High yield quality and stability reduce production fraction defective, reduce the claim of client, improve the satisfaction and trust of client
Sense.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the circuit of elimination abrupt voltage wave of the invention；
Fig. 2 is prior art circuits schematic diagram provided in an embodiment of the present invention；
Fig. 3 is circuit diagram provided in an embodiment of the present invention；
Fig. 4 is the useless surging figure that prior art master chip control module provided in an embodiment of the present invention generates；
Fig. 5 is the useless surging figure that prior art load module provided in an embodiment of the present invention receives signal；
Fig. 6 is the normal waveform figure that master chip control module provided in an embodiment of the present invention issues signal；
Fig. 7 is the normal waveform figure that load blocks provided in an embodiment of the present invention receive signal.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.
It is the structural schematic diagram of the circuit provided by the invention for eliminating abrupt voltage wave referring to Fig. 1.Specifically include that power supply supplies
Electric module 10, for the fixed voltage inputted from fixed voltage input terminal 101 to be transformed to variable voltage, the variable voltage from
First voltage of transformation output end 102, the output of the second voltage of transformation output end 103；
Power conversion module 20, equipped with the first voltage input terminal being connect with the first voltage of transformation output end 102
201, for the variable voltage to be adjusted to burning voltage, the burning voltage exports 202 from first voltage output end；Also set
There are shunt capacitance end 203 and enable end 204；
Master chip control module 30, equipped with the second voltage input terminal being connect with the second voltage of transformation output end 103
301, for providing enabled level signal for the power conversion module 20, the enabled level signal is by enabling output end
302 outputs；
Load circuit module 40, the third electricity being connect equipped with the first voltage output end 202 with the power conversion module
Press input terminal 401；
It is characterized by further comprising:
Single chip control module 50, equipped with the 4th voltage input end being connect with the second voltage of transformation output end 103
501, external power supply power input 502, level control output end 503；
Enabled conducting control module 60, equipped with the control signal input being connect with the level control output end 502
601, the enable signal input terminal 602 that is connect with the enabled output end 302 of the master chip control module 30 and with the power supply
The enable signal output end 603 that the enable end 204 of conversion module 20 connects；
The single chip control module 50 is used to control the enabled conducting that control module 60 is connected and disconnects and its lead
The time that through and off are opened；
Referring to Fig. 2 is the circuit diagram of the prior art provided by the invention, and Fig. 3 is electricity provided in an embodiment of the present invention
Road schematic diagram.
In the present embodiment, as Fig. 1 has the basic module of powering load: power supply power supply mould in the prior art
Block, master chip control module, power conversion module and load blocks.Power supply module uses one-in-and-two-out DC to DC
(DC/DC) power supply U4, power conversion module use linear voltage regulator (LDO) U1, and master chip control module uses arm processor
U3.DC-DC power supply U4 starts to work when machine is powered, and voltage transformation input terminal U4_P1 input voltage A (v) turns
Change B (v) and D (v) into, B (v) and D (v) are respectively from the first voltage of transformation output end U4_P2 and the second voltage of transformation output end
U4_P2 synchronism output, after arm processor U3 is powered on, that enabled output end PWR_EN (U3_ from the arm processor U3
P2) will export a high level to linear voltage regulator (LDO) U1 enable end EN (U1_PIN3), as linear voltage regulator (LDO)
After U1 obtains the high level of power supply B (v) and enable end EN (U1_PIN3), U1 will pass through first voltage output end OUT at once
(U1_PIN5) output voltage C (v) arrives the tertiary voltage input terminal of the load blocks LOAD, after load obtains voltage C (v)
Begin to work.
In the present embodiment, using the circuit of such as Fig. 2, voltage when C (v) is powered on is obtained by test load module LOAD
After find, the enabled output end PWR_EN (U3_P2) for the moment arm processor U3 being initially powered up is also defeated other than exporting high level
The surging without any effect, such as Fig. 3 are gone out, this unwanted voltage surging is output to electricity after linear voltage regulator (LDO) U1
It presses C (v), if Fig. 4, C (v) can also have unwanted voltage surging, and the current moment that goes out of this unwanted voltage surging can load influence
It works normally.By verifying and testing, it is found that the appearance of this surging is the moment started power up due to arm processor U3, soft
Before part program does not start, (general I/O mouthfuls exists the high level output of I/O mouthfuls i.e. enabled output end PWR_EN (U3_P2) in itself
All be to have tens of thousands of ohm of resistance of a pull-up inside IC) be it is uncontrollable, so the enabled output end PWR_EN (U3_
P2 a high level) will be exported to EN (U1_PIN3) foot of linear voltage regulator (LDO) U1, lead to linear voltage regulator (LDO) U1
A useless high level surging is exported by first voltage output end OUT (U1_PIN5) after work operation, so that load
Power supply is unstable and dysfunction occurs, influences the use of load.
For the prior art of such as Fig. 2, the present invention proposes to improve.
Such as Fig. 3, in the present embodiment, enabled output end PWR_EN (U3_P2) and the line in the arm processor U3
Property voltage-stablizer (LDO) U1 enable end EN (U1_PIN3) between increase enabled conducting control module and single chip control module.
The enabled conducting control module is equipped with an a NPN type triode Q1 and P ditch metal-oxide-semiconductor Q2；The single chip control module
Using microcontroller (MCU) U1, for control the conducting between the NPN type triode Q1 and P ditch metal-oxide-semiconductor Q2 and disconnect and its
Conducting and the time disconnected.
In the present embodiment, the level control of the NPN type triode Q1 base stage b connection microcontroller (MCU) U2
Output end CN (U2_P1)；The source S of the P ditch metal-oxide-semiconductor Q2 connects the enabled output end PWR_EN of the arm processor U3
(U3_P2), the grid G of the P ditch metal-oxide-semiconductor Q2 connects the collector c of the NPN type triode Q1, the P ditch metal-oxide-semiconductor Q2's
Drain D connects the enable end EN (U1_PIN3) of linear voltage regulator (LDO) U1.
In the present embodiment, microcontroller (MCU) U2 is powered by external power supply, and external power supply E (v) is from external power supply
Power input U2_P3 input；The voltage D (v) that the 4th voltage input end U2_P2 of microcontroller (MCU) U2 is obtained makees
It is exported for a high level by the level control output end CN (U2_P1).When the microcontroller (MCU) U2 obtains voltage D
(v) when, the program of software starts not yet, and the enabled output end PWR_EN (U3_P2) of the arm processor U3 has been just at this time
String voltage D (v) output is filled, and this when of the NPN type triode Q1 is by the microcontroller (MCU) U2 electricity simultaneously
Flat control output end CN (U2_P1) control, is not turned on, and control purpose at this time is exactly to extend according to unwanted voltage surging
Time by microcontroller (MCU) U2 calculate control NPN type triode Q1 and the P ditch metal-oxide-semiconductor Q2 conducting with disconnect
Time, when unwanted voltage surging disappears, such as Fig. 5 passes through the level control output end CN (U2_ the microcontroller (MCU) U2
P1) level sets high the NPN type triode Q1 is connected, thus drag down the grid G of the P ditch metal-oxide-semiconductor Q2 in low level, this
The source S voltage of Shi Suoshu P ditch metal-oxide-semiconductor Q2 is greater than its grid G voltage, and P ditch metal-oxide-semiconductor Q2 described in reverse bias is connected, then institute
The enable end EN (U1_PIN3) for stating linear voltage regulator (LDO) U1 obtains high level, such as Fig. 6, linear voltage regulator (LDO) U1
Be enabled opening, so that voltage B (v) is converted into load voltage C (v), this when of the linear voltage regulator (LDO) U1 output
Voltage C (v) be no unwanted voltage surging, it is very perfect such as Fig. 7.
In the present embodiment, the source S of the P ditch metal-oxide-semiconductor Q2 connects first resistor R1 and first capacitor C1 in parallel
First connecting pin is protected the P ditch metal-oxide-semiconductor Q2, is prevented breakdown；The enabled output end PWR_EN of the arm processor U3
(U3_P2) second resistance R2 is connected between the source S of the P ditch metal-oxide-semiconductor Q2；The grid G of the P ditch metal-oxide-semiconductor Q2 connects
The second connection end of the first resistor R1 and first capacitor C1 in parallel, the second connection end and the NPN type triode
3rd resistor R3 is connected between the collector c of Q1.
In the present embodiment, the first voltage output end OUT (U1_PIN5) of linear voltage regulator (LDO) U1 and bypass
The second capacitor C2 and third capacitor C3 are parallel between capacitance terminal U/C (U1_PIN4), and shunt capacitance end U/C (U1_PIN4) connects
The output voltage C (v) of the linear voltage regulator (LDO) U1 is protected on ground；The tertiary voltage output end connection the 4th electricity in parallel
Hold one end of C4 and the 4th resistance R4, the other end ground connection of the 4th capacitor C4 and the 4th resistance R4 of the parallel connection, to described negative
The input voltage C (v) for carrying module plays filter action；The second voltage of transformation output end U4_P2 and the microcontroller
(MCU) the 5th resistance R5 is connected between the 4th voltage input end U2_P2 of U2；The first voltage input terminal IN (U1_
PIN1 one end of the 5th capacitor C5, the other end ground connection of the 5th capacitor C5) are connected；The enable end EN (U1_PIN1)
The connection of six one end capacitor C6, the other end ground connection of the 6th capacitor C6.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (5)
1. a kind of circuit for eliminating abrupt voltage wave, comprising:
Power supply module, it is described variable for the fixed voltage inputted from fixed voltage input terminal to be transformed to variable voltage
Voltage is exported from the first voltage of transformation output end, the second voltage of transformation output end；
Power conversion module, equipped with the first voltage input terminal connecting with the first voltage of transformation output end, being used for will be described
Variable voltage is adjusted to burning voltage, and the burning voltage is exported from first voltage output end；It is additionally provided with shunt capacitance end and makes
It can end；
Master chip control module is used for equipped with the second voltage input terminal connecting with the second voltage of transformation output end as institute
It states power conversion module and enabled level signal is provided, the enabled level signal is exported by enabled output end；
Load circuit module, the tertiary voltage input terminal being connect equipped with the first voltage output end with the power conversion module；
It is characterized by further comprising:
Single chip control module, equipped with the 4th voltage input end, the external power supply being connect with the second voltage of transformation output end
Power input, level control output end；
Enabled conducting control module, equipped with the control signal input being connect with the level control output end and the main core
It the enable signal input terminal of the enabled output end connection of piece control module and connect with the enable end of the power conversion module
Enable signal output end；
The enabled conducting control module is equipped with NPN type triode and P ditch metal-oxide-semiconductor；
The base stage of the NPN type triode connects the level control output end of the single chip control module, three pole of NPN type
The collector of pipe connects the grid of the P ditch metal-oxide-semiconductor, and the source electrode of the P ditch metal-oxide-semiconductor connects making for the master chip control module
Energy output end, the drain electrode of the P ditch metal-oxide-semiconductor connect the enable end of the power conversion module；
First connecting pin of the source electrode connection of the P ditch metal-oxide-semiconductor first resistor and first capacitor in parallel, first connecting pin
Second resistance is connected between the enabled output end of the master chip control module；The grid of the P ditch metal-oxide-semiconductor connects in parallel
The first resistor and first capacitor second connection end, the collector of the second connection end and the NPN type triode
Between be connected with 3rd resistor；
The single chip control module uses microcontroller, for controlling leading between the NPN type triode and P ditch metal-oxide-semiconductor
The time with disconnection is opened and its is connected in through and off.
2. a kind of circuit for eliminating abrupt voltage wave as described in claim 1, it is characterised in that: the single chip control module is used
In the time be connected with disconnection and its conducting and disconnection for controlling the enabled conducting control module.
3. a kind of circuit for eliminating abrupt voltage wave as described in claim 1, it is characterised in that: the of the power supply module
One voltage of transformation output end, the second voltage of transformation output end are according to the power conversion module and master chip control module or monolithic
The voltage of machine control module requires output different voltages.
4. a kind of circuit for eliminating abrupt voltage wave as described in claim 1, it is characterised in that: the master chip control module
Enabled output end is that high level enables output end；The enable end of the power conversion module is high level enable end.
5. a kind of circuit for eliminating abrupt voltage wave as described in claim 1, it is characterised in that: the first voltage output end with
The second capacitor and third capacitor are parallel between shunt capacitance end, and shunt capacitance end is grounded；The tertiary voltage input terminal connects
One end of the 4th capacitor and the 4th resistance in parallel is connect, the 4th capacitor of the parallel connection and the other end of the 4th resistance are grounded；Institute
It states and is connected with the 5th resistance between the second voltage of transformation output end and the 4th voltage input end；The first voltage input terminal
Connect one end of the 5th capacitor, the other end ground connection of the 5th capacitor；The enable end connection the 6th of the power supply module
One end of capacitor, the other end ground connection of the 6th capacitor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610650046.7A CN106230235B (en) | 2016-08-09 | 2016-08-09 | A kind of circuit for eliminating abrupt voltage wave |
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| CN201610650046.7A CN106230235B (en) | 2016-08-09 | 2016-08-09 | A kind of circuit for eliminating abrupt voltage wave |
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| CN106230235B true CN106230235B (en) | 2019-06-04 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107154728A (en) * | 2017-05-19 | 2017-09-12 | 威创集团股份有限公司 | A kind of DC voltage electrifying timing sequence control device |
| CN108683159B (en) * | 2018-04-27 | 2022-06-21 | 东莞龙升电子有限公司 | Power supply protection circuit for preventing voltage surge and control method thereof |
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| CN102290978A (en) * | 2011-08-04 | 2011-12-21 | 无锡中星微电子有限公司 | Power management system |
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| CN106230235A (en) | 2016-12-14 |
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