CN109884428A - A kind of method and test circuit for improving the stability of circuit system - Google Patents
A kind of method and test circuit for improving the stability of circuit system Download PDFInfo
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- CN109884428A CN109884428A CN201910134278.0A CN201910134278A CN109884428A CN 109884428 A CN109884428 A CN 109884428A CN 201910134278 A CN201910134278 A CN 201910134278A CN 109884428 A CN109884428 A CN 109884428A
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Abstract
The present invention relates to power system technologies field more particularly to a kind of methods and test circuit for improving the stability of circuit system, suitable for verifying pot machine ageing process, including: step S1, a DC-DC switching power circuit is provided；Step S2, in one interference circuit of the feedback end connection of DC-DC switching power circuit, different types of disturbed test is carried out to improve the stability of circuit system in interference circuit.Technical solution of the present invention beneficial effect is: quickly and effectively verifying in pot machine ageing process, power supply leads to the problem of fluctuation to circuit system stabilizing influence, so that the production efficiency of electronic product and the discovery probability of potential problems are significantly improved, the stability after further increasing electronic product listing.
Description
Technical field
The present invention relates to power system technologies field more particularly to a kind of methods for improving the stability of circuit system
And test circuit.
Background technique
Currently, electronic product exploitation and factory stage will carry out pot machine degradation to complete machine, with analog subscriber end
The problem of being likely to occur, wherein the stability of power-supply system is the most common problem occurred in the machine of pot, but is also to be most difficult to look into
Problem, because present electronic product has the power supply on many roads, if there are random abnormal conditions for some power supply, with routine
Method time and effort consuming is also difficult to find problem place.
In the prior art, when power-supply system when something goes wrong, most of is all that random, conventional detection is exactly,
Power supply implementation is continued to monitor plus detection devices such as oscillographs on power supply as much as possible, needs is done so and spends largely
Time reappear problem, so cannot timely and effectively find the problem.Also, due to the main power source for influencing system stability
It is substantially all using DC-DC Switching Power Supply, Switching Power Supply has feedback end to guarantee the voltage amplitude and ripple of output, such as Fig. 1
It is shown, it is common buck converter topology, by the voltage of the partial pressure sampling output of two resistance, using a comparison
Device and benchmark compare, if output is less than benchmark, metal-oxide-semiconductor is just open-minded；If output is greater than benchmark, metal-oxide-semiconductor is just turned off, this is taken
Kind of method can make output be maintained at a normal range, the stability influence power supply of the feedback input end of sampling it is steady
It is qualitative.
Summary of the invention
For the above-mentioned problems in the prior art, a kind of method for improving the stability of circuit system is now provided
And circuit diagram.
Specific technical solution is as follows:
A method of for improving the stability of circuit system, suitable for verifying pot machine ageing process, including:
Step S1, a DC-DC switching power circuit is provided；
Step S2, the one interference circuit of feedback end connection of Yu Suoshu DC-DC switching power circuit, in the interference circuit
Different types of disturbed test is carried out to improve the stability of circuit system.
Preferably, in Yu Suoshu step S2, the interference circuit is by inputting different ripple or increasing to the feedback end
Scrambling is dynamic, to improve the stability of circuit system.
Preferably, in Yu Suoshu step S2, described in the duty ratio adjustment by the GPIO interface that the interference circuit is arranged
The amplitude of ripple with energy source circuit figure is to a predetermined amplitude, so that the output voltage of the circuit system is in a predeterminated voltage
In range, to improve the stability of circuit system.
Preferably, the predetermined amplitude is 8.33mV/Step；And/or
The predetermined voltage range is between 0.721-1.021V.
Preferably, in Yu Suoshu step S2, an external noise source is increased into the feedback end and forms the ripple needed, with
Improve the stability of circuit system.
The invention also includes a kind of for improving the test circuit of the stability of circuit system, is suitable for verifying pot machine aging
In the process, which is characterized in that using the method for the stability described in above-mentioned any one for improving circuit system, the use
Include: in the test circuit for the stability for improving circuit system
One DC-DC switching power circuit；
One interference circuit, is connected to the feedback end of the DC-DC switching power circuit, carries out not in the interference circuit
The disturbed test of same type is to improve the stability of circuit system.
Preferably, the interference circuit includes:
One resistor voltage divider circuit, the input terminal of the resistor voltage divider circuit are connected to the feedback end；
One pwm signal input terminal, the output end of the resistor voltage divider circuit is connected by a first resistor；
One cpu power end connects the pwm signal input terminal by a second resistance；
One 3rd resistor is connected between the second resistance and ground terminal；
One first capacitor is connected between the second resistance and ground terminal.
Preferably, the resistor voltage divider circuit include predetermined number and be connected in series with each other in output end and ground terminal it
Between divider resistance, for the dot being connected between the divider resistance at divider node, the divider node connection is described anti-
Present end.
Preferably, the interference circuit is by inputting different ripples to the feedback end or increasing disturbance, to improve electricity
The stability of road system.
Preferably, the feedback end is increased to by an external noise source and forms the ripple needed, to improve circuit system
Stability.
Technical solution of the present invention beneficial effect is: provide a kind of method for improving the stability of circuit system and
Circuit is tested, is quickly and effectively verified in pot machine ageing process, power supply leads to the problem of fluctuation to circuit system stabilizing influence, makes
The discovery probability of the production efficiency and potential problems that obtain electronic product is significantly improved, after further increasing electronic product listing
Stability.
Detailed description of the invention
With reference to appended attached drawing, more fully to describe the embodiment of the present invention.However, appended attached drawing be merely to illustrate and
It illustrates, and is not meant to limit the scope of the invention.
Fig. 1 is the topological circuit connection figure about buck converter in the prior art；
Fig. 2 is the step flow chart of the method for the stability for improving circuit system of the embodiment of the present invention；
Fig. 3 is the circuit diagram of the test circuit of the stability for improving circuit system of the embodiment of the present invention.
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 clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without creative labor it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be further explained below with reference to the attached drawings and specific examples, but not as the limitation of the invention.
The present invention includes a kind of method for improving the stability of circuit system, is suitable for verifying pot machine ageing process
In, including:
Step S1, a DC-DC switching power circuit is provided；
Step S2, it in one interference circuit of the feedback end connection of DC-DC switching power circuit, is carried out in interference circuit different
The disturbed test of type is to improve the stability of circuit system.
By above-mentioned for improving the technical solution of the method for the stability of circuit system, as shown in Fig. 2, utilizing its feedback
Hold this characteristic of (FB), so that it may which the artificial fluctuation as needed that needs are added, as shown in connection with fig. 3, interference circuit is used to
It adjusts output voltage and the circuit of ripple interference is added, the line of the power supply can be adjusted by the way that the output duty cycle of GPIO is arranged
The amplitude of wave, or loaded by setting external noise source and form the ripple needed at feedback end (FB), i.e., by giving feedback end
(FB) it inputs different ripple or increase to disturb this mode quickly to verify and assess in pot machine ageing process, ripple pair
The influence of whole system stability.
Further, it quickly and effectively verifies in pot machine ageing process, power supply generates fluctuation to circuit system stabilizing influence
The problem of, so that the discovery probability of the production efficiency of electronic product and potential problems is significantly improved, further increase electronics
Stability after launch.
In above-mentioned technical proposal, it is preferred that in step S2, interference circuit by feedback end input different ripple or
Increase disturbance, to improve the stability of circuit system.
In above-mentioned technical proposal, it is preferred that in step S2, pass through the duty ratio tune of the GPIO interface of setting interference circuit
The amplitude of the whole ripple with energy source circuit figure is to a predetermined amplitude, so that the output voltage of circuit system is in a predeterminated voltage model
In enclosing, to improve the stability of circuit system, wherein predetermined amplitude is 8.33mV/Step；And/or predetermined voltage range is
Between 0.721-1.021V.
In above-mentioned technical proposal, it is preferred that in step S2, an external noise source is increased to feedback end and forms needs
Ripple, to improve the stability of circuit system.
In a kind of preferably embodiment, since feedback end (FB) is a negative-feedback of DC-DC, increase feedback
The voltage for holding (FB), then exporting can be whole toward low-key, reduces the voltage of feedback end (FB), and output end can be toward height adjustment, the width of adjustment
Spend Vamp=Vfb-Vref, wherein Vfb is for indicating feedback voltage, and Vref is for indicating reference voltage.
Specifically, it selects parameter above as an example, first confirms that circuit parameter is as shown in Table 1.
Table one
| Project | Numerical value |
| PWM_GPIO_VCC(V) | 1.8 |
| FB(V) | 0.6 |
| (Kohm) is hindered on FB | 20 |
| (Kohm) is hindered under FB | 37.4 |
| FB string resistance (Kohm) | 100 |
| PWM string resistance (Kohm) | 20 |
Pass through formula: resistance+FB on Vout=(resistance+(FB-Vadj)/(resistance of FB string resistance+PWM string) under FB/FB) * FB, wherein
The practical PWM width H/ of Vadj==(the practical PWM width H of practical PWM width L+) * PWM_GPIO_VCC.
Further, according to different PWM duty cycles from 0%~100%, point 36 steps are calculated corresponding electric
Pressure value is as shown in Table 2.
Table two
Further, it is as shown in Table 3 actually to measure the voltage value come.
Table three
| VDDCPU range | Minimum value (V) | Maximum value (V) | Remarks |
| Calculated value | 0.721 | 1.021 | Pass through calculating |
| Measured value | 0.723 | 1.028 | Pass through measurement |
From upper table three as can be seen that if current steps numerical value can make DC-DC output voltage range 0.721
Fluctuated between~1.021, the amplitude of adjustment is 8.33mV/Step, actual measured value in the case where excluding component error with
Calculated value be it is identical, thus can be with the fluctuation of analog power voltage.
Further, it quickly and effectively verifies in pot machine ageing process, power supply generates fluctuation to circuit system stabilizing influence
The problem of, so that the discovery probability of the production efficiency of electronic product and potential problems is significantly improved, further increase electronics
Stability after launch.
The invention also includes a kind of for improving the test circuit of the stability of circuit system, as shown in figure 3, being suitable for testing
It demonstrate,proves in pot machine ageing process, which is characterized in that the method for using the stability for improving circuit system of above-mentioned any one,
The test circuit of stability for improving circuit system includes:
One DC-DC switching power circuit；
One interference circuit, is connected to the feedback end FB of DC-DC switching power circuit, carries out different type in interference circuit
Disturbed test to improve the stability of circuit system.
In above-mentioned technical proposal, interference circuit includes:
The input terminal of one resistor voltage divider circuit, resistor voltage divider circuit is connected to feedback end；
One pwm signal input terminal CORE_PWM passes through the output end of a first resistor R1125 connection resistor voltage divider circuit；
One cpu power end VDDCPU passes through a second resistance R1124 connection pwm signal input terminal CORE_PWM；
One 3rd resistor R1127, is connected between second resistance R1124 and ground terminal GND；
One first capacitor C1141, is connected between second resistance R1124 and ground terminal GND.
In above-mentioned technical proposal, resistor voltage divider circuit includes predetermined number and is connected in series with each other in output end and ground connection
Divider resistance (R1126, R1129) between end, the dot being connected between divider resistance (R1126, R1129) are saved at partial pressure
Point, divider node connect feedback end.
In above-mentioned technical proposal, interference circuit is by inputting different ripples to feedback end or increasing disturbance, to improve electricity
The stability of road system.
In above-mentioned technical proposal, feedback end is increased to by an external noise source and forms the ripple needed, to improve circuit
The stability of system.
The foregoing is merely preferred embodiments of the present invention, are not intended to limit embodiments of the present invention and protection model
It encloses, to those skilled in the art, should can appreciate that all with made by description of the invention and diagramatic content
Equivalent replacement and obviously change obtained scheme, should all be included within the scope of the present invention.
Claims (10)
1. a kind of method for improving the stability of circuit system, suitable for verifying pot machine ageing process, which is characterized in that
Include:
Step S1, a DC-DC switching power circuit is provided；
Step S2, the one interference circuit of feedback end connection of Yu Suoshu DC-DC switching power circuit, carries out in the interference circuit
Different types of disturbed test is to improve the stability of circuit system.
2. the method according to claim 1 for improving the stability of circuit system, which is characterized in that Yu Suoshu step
In S2, the interference circuit is by inputting different ripples to the feedback end or increasing disturbance, to improve the steady of circuit system
It is qualitative.
3. the method according to claim 2 for improving the stability of circuit system, which is characterized in that Yu Suoshu step
In S2, the amplitude of the ripple with energy source circuit figure is adjusted extremely by the way that the duty ratio of GPIO interface of the interference circuit is arranged
One predetermined amplitude, so that the output voltage of the circuit system is in a predetermined voltage range, to improve the steady of circuit system
It is qualitative.
4. the method according to claim 1 for improving the stability of circuit system, which is characterized in that the default width
Degree is 8.33mV/Step；And/or
The predetermined voltage range is between 0.721-1.021V.
5. the method according to claim 2 for improving the stability of circuit system, which is characterized in that Yu Suoshu step
In S2, an external noise source is increased into the feedback end and forms the ripple needed, to improve the stability of circuit system.
6. it is a kind of for improving the test circuit of the stability of circuit system, suitable for verifying pot machine ageing process, feature
It is, it is described to be used for using the method for the stability described in the claims 1-5 any one for improving circuit system
The test circuit of stability for improving circuit system includes:
One DC-DC switching power circuit；
One interference circuit, is connected to the feedback end of the DC-DC switching power circuit, carries out inhomogeneity in the interference circuit
The disturbed test of type is to improve the stability of circuit system.
7. according to claim 6 for improving the test circuit of the stability of circuit system, which is characterized in that described dry
Disturbing circuit includes:
One resistor voltage divider circuit, the input terminal of the resistor voltage divider circuit are connected to the feedback end；
One pwm signal input terminal, the output end of the resistor voltage divider circuit is connected by a first resistor；
One cpu power end connects the pwm signal input terminal by a second resistance；
One 3rd resistor is connected between the second resistance and ground terminal；
One first capacitor is connected between the second resistance and ground terminal.
8. according to claim 6 for improving the test circuit of the stability of circuit system, which is characterized in that the electricity
Resistance bleeder circuit includes predetermined number and is connected in series with each other the divider resistance between output end and ground terminal, the partial pressure
The dot being connected between resistance connects the feedback end at divider node, the divider node.
9. according to claim 6 for improving the test circuit of the stability of circuit system, which is characterized in that described dry
Circuit is disturbed by inputting different ripples to the feedback end or increasing disturbance, to improve the stability of circuit system.
10. according to claim 6 for improving the test circuit of the stability of circuit system, which is characterized in that pass through
One external noise source increases to the feedback end and forms the ripple needed, to improve the stability of circuit system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910134278.0A CN109884428A (en) | 2019-02-22 | 2019-02-22 | A kind of method and test circuit for improving the stability of circuit system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910134278.0A CN109884428A (en) | 2019-02-22 | 2019-02-22 | A kind of method and test circuit for improving the stability of circuit system |
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ID=66928842
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| CN107658863A (en) * | 2017-10-09 | 2018-02-02 | 珠海格力电器股份有限公司 | Suppress the circuit that direct current capacitive load switching impacts to direct-current micro-grid |
| CN107769557A (en) * | 2017-11-07 | 2018-03-06 | 中国电子科技集团公司第四十七研究所 | Switching power unit and its suppression output ripple method with ripple Acquisition Circuit |
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2019
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101039076A (en) * | 2007-04-28 | 2007-09-19 | 电子科技大学 | Voltage-stabilizing switch power source with voltage ripple detection circuit |
| CN101039077A (en) * | 2007-04-28 | 2007-09-19 | 电子科技大学 | Current-stabilizing switch power source with voltage ripple detection circuit |
| CN202221966U (en) * | 2011-09-09 | 2012-05-16 | 山东沃森电源设备有限公司 | Direct current power supply transfer device capable of reducing power frequency ripple |
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| CN107658863A (en) * | 2017-10-09 | 2018-02-02 | 珠海格力电器股份有限公司 | Suppress the circuit that direct current capacitive load switching impacts to direct-current micro-grid |
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Application publication date: 20190614 |
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