CN105958812A - Switch power supply circuit and method for debugging switch power supply circuit - Google Patents
Switch power supply circuit and method for debugging switch power supply circuit Download PDFInfo
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- CN105958812A CN105958812A CN201610423226.1A CN201610423226A CN105958812A CN 105958812 A CN105958812 A CN 105958812A CN 201610423226 A CN201610423226 A CN 201610423226A CN 105958812 A CN105958812 A CN 105958812A
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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
- H02M1/32—Means for protecting converters other than automatic disconnection
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Voltage And Current In General (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a switch power supply circuit and a method for debugging the switch power supply circuit. The switch power supply circuit comprises a switch power supply main circuit, a damping circuit and a debugging circuit, wherein the switch power supply main circuit comprises a switch node; the damping circuit is connected between the switch node and the ground; the damping circuit comprises a resistor network which consists of multiple resistors and a capacitor network which consists of multiple capacitors; and the debugging circuit is used for adjusting the resistance value when the resistor network is connected to the damping circuit and/or the capacitance value when the capacitor network is connected to the damping circuit according to the instantaneous amplitude value of the switch node in the starting moment of the switch power supply main circuit. By adoption of the embodiments of the invention, the internal structure of the integrated circuit is improved, and the adaptive adjustment of the overshoot amplitude of the switch node is realized.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of switching power circuit and to switching power circuit
The method carrying out debugging.
Background technology
Switching Power Supply, owing to efficiency is high, output electric current is big, is widely used in mobile phone circuit design.Except flat
The DC source DCDC that platform carries, external function module is also required to independent DCDC and powers.Such as give screen
The curtain backlight drive circuit (backlight drive IC) of backlight power supply, LCM (LCD MODULE) bias supply drive
Dynamic IC, the charging IC etc. charged the battery.
And Switching Power Supply is due to the characteristic of the device such as inductance of its switching characteristic and use, adds mobile phone plank face
The long-pending restriction with cabling, the problem that usually there will be some signal qualitys.The moment that such as DCDC starts,
Switch foot usually there will be the voltage more than IC specification, causes damaging IC.
As a example by boost circuit (booster circuit), the producing cause of problem and solution of the prior art are described
Method.
As it is shown in figure 1, this circuit is the equivalent circuit that booster circuit is corresponding, it has to be considered that plank and IC's
Parasitic capacitance CPARWith stray inductance LPAR.The node that inductance L1 and two switches (Q1 and D1) connect claims
For switching node.Switch between lead-in wire, switch and ground, existence between diode and output, electric capacity and ground
Stray inductance LPAR, diode and FET (field-effect transistor) itself also exist parasitic capacitance CPAR.By
In parasitic capacitance and the effect of stray inductance, at switching node, often produce the oscillating voltage more than 200M.
If the maximum limit that the voltage amplitude of vibration is more than Q1, Q1 will damage, and this high frequency vibrating is dissipated one's fortune simultaneously
Raw EMI (electromagnetic interference) influences whether the IC of adnexa.According to the equivalent circuit of Fig. 1, vibration basic
Reason is that parasitic parameter causes, and SW node line produces at FET turn-off transient with the stray inductance of FET
Bigger di/dt (change of electric current in the unit interval).According to formula V=L*di/dt, due to stray inductance
Exist, create peak voltage.
There is many kinds of measures can reduce the amplitude of this punching of vibrating.Such as, can select to post the when of IC design
Giving birth to the little FET of electric capacity and diode, the when of application, the layout of switch and inductance is placed close proximity to IC, with
Reduce LPAR2And LPAR3；Or reduce the distance between FET and power supply ground, to reduce LPAR1；Or
Output capacitance is placed close proximity to diode and power supply, reduces LPAR4And LPAR5；Or at output and power supply
Shunt capacitance C of a 0.01uf-2.2uf is added between groundOUT-BYP。
C due to the FET that IC is internally integratedPAR, LPAR1, LPAR2, LPAR3Value has been fixed from changing,
And due to plank layout and dimensional problem, improve PCB layout and be likely to not accomplish, measure presented above
The most feasible.Therefore, it is recommended that add snubber circuit (antihunt circuit) on switching node, by damping
Circuit can absorb energy, reduces the spike waveform produced when switch is opened due to stray inductance.snubber
Circuit by the electric current that produces to stray inductance to a backup path is provided, with reduce voltage transient response,
Suppress the vibration that parasitic capacitance produces subsequently when switch is opened.In Fig. 1, RSNUBAnd CSUNBConstitute resistance
Buddhist nun's circuit, the high frequency that suppression SW foot produces crosses punching.The when of actual solution, need to be surveyed by oscillograph
The overshoot voltage started to SW foot, the most manually changes small capacitances and goes to improve this problem.
There is following defect in i.e. prior art:
1, need manually to go to change electric capacity and resistance go debugging, different projects because layout and the reason of cabling,
Having the capacitance improving effect all possible different, debugging efficiency reduces；
2, IC cannot detect overvoltage, it is impossible to goes automatic adjustment switch foot amplitude, does not has adaptation function；
3, due to the conforming problem of plank, it is understood that there may be fixed capacity and resistance cannot solve some plank
Overshoot amplitude problem.
Summary of the invention
It is an object of the invention to provide a kind of switching power circuit and the side that switching power circuit is debugged
Method, solves can only rely in prior art and manually goes to change electric capacity, resistance to adjust switching node amplitude effect
The problem that rate is relatively low.
In order to achieve the above object, on the one hand, the embodiment of the present invention provides a kind of switching power circuit, including:
Switching Power Supply main circuit, described Switching Power Supply main circuit includes switching node；
Being connected to the antihunt circuit between described switching node and ground, described antihunt circuit includes multiple resistor group
The resistor network become and the capacitance network of multiple electric capacity composition；
Debugging circuit, described debugging circuit is for starting switching node described in moment according to Switching Power Supply main circuit
Instant amplitude value, adjust described resistor network and access the resistance value in described antihunt circuit and/or adjust described
Capacitance network accesses the capacitance in described antihunt circuit.
On the other hand, the embodiment of the present invention also provides for a kind of debugging switching power circuit as above
Method, described method includes:
Debugging electric circuit inspection Switching Power Supply main circuit starts moment, the switching node of described Switching Power Supply main circuit
Instant amplitude value；
Described debugging circuit starts the instantaneous amplitude of switching node described in moment according to described Switching Power Supply main circuit
Value, adjusts described resistor network and accesses the resistance value in described antihunt circuit and/or adjust described capacitance network and connect
Enter the capacitance in described antihunt circuit.
The technique scheme of the present invention at least has the advantages that
In the switching power circuit of the embodiment of the present invention and method that switching power circuit is debugged, pass through
It is set to the antihunt circuit in switching power circuit be made up of resistor network and capacitance network, and at switch electricity
Source circuit is internally integrated a debugging circuit, debugging circuit determine by adjusting resistor network and/or capacitance network
Access resistance value and/or the capacitance of antihunt circuit, so that switching power circuit can be according to instantaneous amplitude
Value adjusts resistance value and/or the capacitance of antihunt circuit automatically, it is achieved that the self-adaptative adjustment of overshoot amplitude.
Accompanying drawing explanation
Fig. 1 represents the composition structure chart of prior art breaker in middle power circuit；
Fig. 2 represents the composition structural representation of the switching power circuit that the first embodiment of the present invention provides；
Fig. 3 represents the base of the method debugging switching power circuit that the second embodiment of the present invention provides
This flow chart of steps；
Fig. 4 represents the tool of the method debugging switching power circuit that the second embodiment of the present invention provides
Body example flow diagram.
Detailed description of the invention
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with attached
Figure and specific embodiment are described in detail.
First embodiment
As in figure 2 it is shown, the first embodiment of the present invention provides a kind of switching power circuit, including:
Switching Power Supply main circuit, described Switching Power Supply main circuit includes switching node SW；As it is shown in figure 1,
Switching Power Supply main circuit includes: input power 100, input power 100 for give just to switching power circuit and
Peripheral circuit is powered；Input capacitance 101, input capacitance 101 is for being filtered to input power 100；Electricity
Sense 103, inductance 103 is for storing electric current for switching power circuit；First switching tube 105 and second switch pipe
106, the boosting of voltage is realized by adjusting the ON time of the first switching tube 105 and second switch pipe 106；
Switching node 104, switching node 104 be inductance 103 and the first switching tube 105 and second switch pipe 106 even
The node connect；Output voltage 108 and output capacitance 109, output capacitance 109 is for output voltage 108
It is filtered.
Being connected to the antihunt circuit 20 between described switching node 104 and ground, described antihunt circuit 20 includes many
The resistor network of individual resistance composition and the capacitance network of multiple electric capacity composition；This antihunt circuit is programmable RC
Circuit, it includes a resistor network and a capacitance network, and resistor network is made up of multiple resistance, capacitance network
It is made up of multiple electric capacity；The resistance accessing antihunt circuit can be changed by the connected mode changing multiple resistance
Value and/or the connected mode by the multiple electric capacity of change change the capacitance accessing antihunt circuit.
Debugging circuit, described debugging circuit is for starting switching node described in moment according to Switching Power Supply main circuit
Instant amplitude value, adjust described resistor network and access the resistance value in described antihunt circuit and/or adjust described
Capacitance network accesses the capacitance in described antihunt circuit.
The embodiment of the present invention is improved switching node by the internal structure of transformation switching power circuit and is crossed punching, its
Switching power circuit is integrated circuit；Concrete, RC antihunt circuit is placed on integrated electricity by the embodiment of the present invention
The inside on road also increases debugging circuit, and once debugging module automatically detects the instant amplitude value of switching node and surpasses
Cross specification requirement, the most automatically adjust resistance value and the capacitance of RC antihunt circuit, and then adjust switching node
Overshoot amplitude, until being adjusted to the instant amplitude value of switching node to reach specification requirement, complete overshoot amplitude
Self-adaptative adjustment, improve debugging efficiency to switching power circuit.
Concrete, include as in figure 2 it is shown, debug circuit described in the first embodiment of the present invention:
Amplitude detection circuit 31, described amplitude detection circuit is used for detecting Switching Power Supply main circuit and starts moment,
The instant amplitude value of the switching node of described Switching Power Supply main circuit；
Adjusting circuit 32, described adjustment circuit is for when the instant amplitude value of described switching node is more than presetting width
During angle value, adjust described resistor network and access the resistance value in described antihunt circuit and/or adjust described electric capacity net
Network accesses the capacitance in described antihunt circuit.
In the first embodiment of the present invention, amplitude detection circuit 31 detects the instantaneous width of switching node 104 automatically
Angle value, if the instant amplitude value of described switching node is more than predetermined amplitude value, shows that this switching node 104 is deposited
At overshoot voltage, the first switching tube 105 or second switch pipe 106 may be damaged, the most also can affect attached
Other near circuit；Now adjusting circuit 32 needs resistance value and/or capacitance to accessing antihunt circuit to carry out
It is adjusted so that the instant amplitude value of switching node is less than or equal to predetermined amplitude value.
Further, described in the above embodiment of the present invention, switching power circuit also includes: the first depositor
And second depositor；Concrete, described adjustment circuit 32 is for adjusting by the value revising the first depositor
Whole described resistor network is accessed the resistance value in described antihunt circuit and/or is come by the value revising the second depositor
Adjust described capacitance network and access the capacitance in described antihunt circuit.
In the first embodiment of the present invention, adjust circuit 32 by the value revising the first depositor control with respectively
Multiple switches that individual resistance connects thus adjust described resistor network and access the resistance value in described antihunt circuit；
Same, adjust circuit 32 and multiple opened by what the value revising the second depositor controlled to be connected with each electric capacity
Close thus adjust described capacitance network and access the capacitance in described antihunt circuit.
Will not be once it should be noted that adjustment circuit 32 is possible during adjusting resistance value and/or capacitance
Just adjust successfully, therefore be both needed to restart Switching Power Supply main circuit after adjusting every time, re-start another
The instantaneous amplitude detection of switching node judge and the adjustment of antihunt circuit, concrete, described adjustment circuit 302
After adjusting the resistance value accessed in described antihunt circuit and/or adjusting the capacitance accessed in described antihunt circuit,
Described amplitude detection circuit 31 again detects described Switching Power Supply main circuit and starts the wink of switching node described in moment
Time range value, if described Switching Power Supply main circuit starts the instant amplitude value of switching node described in moment more than institute
Stating predetermined amplitude value, described adjustment circuit 32 adjusts the resistance value accessed in described antihunt circuit and/or accesses institute
State the described Switching Power Supply main circuit that the capacitance in antihunt circuit detects until described amplitude detection circuit 31
Start the instant amplitude value of switching node described in moment less than described predetermined amplitude value.
In the first embodiment of the present invention, the when that Switching Power Supply main circuit starting, amplitude detection circuit 31 is examined
The instantaneous amplitude of slowdown monitoring switch node SW, if it exceeds specification preset value, then says the word and is given to adjust circuit 32
Adjust the access resistance value of antihunt circuit and/or access capacitance, until the instantaneous amplitude of switching node SW falls
Within the scope of entering normal specifications.
To sum up, the first embodiment of the present invention provides a kind of switching power circuit, by transformation integrated circuit
Internal structure is improved switching node SW and is crossed punching.The embodiment of the present invention is placed on integrated circuit RC antihunt circuit
Inside, and increase rf amplitude testing circuit, once testing circuit automatically detects switching node SW and surpasses
Cross specification, the most automatically revise the value of the RC of antihunt circuit, and then adjust the overshoot amplitude of SW,
Until the SW amplitude being adjusted to reaches specification, complete the self-adaptative adjustment of overshoot amplitude.The present invention
The embodiment provided, without manually debugging test, is completed the debugging of switching node completely by IC interior
Process, reduces difficulty and the cost of design of debugging.
Second embodiment
As it is shown on figure 3, the second embodiment of the present invention provides one to enter switching power circuit as above
The method of row debugging, described method includes:
Step 301, debugging electric circuit inspection Switching Power Supply main circuit starts moment, described Switching Power Supply main circuit
The instant amplitude value of switching node；As in figure 2 it is shown, as it is shown in figure 1, Switching Power Supply main circuit includes: defeated
Entering power supply 100, input power 100 is just powered to switching power circuit and peripheral circuit for giving；Input capacitance
101, input capacitance 101 is for being filtered to input power 100；Inductance 103, inductance 103 be used for be
Integrated circuit storage electric current；First switching tube 105 and second switch pipe 106, by adjusting the first switching tube
105 and the ON time of second switch pipe 106 realize the boosting of voltage；Switching node 104, switching node
104 are inductance 103 and the first switching tube 105 and node that second switch pipe 106 connects；Output voltage 108
And output capacitance 109, output capacitance 109 is for being filtered output voltage 108.
Step 302, described debugging circuit starts switching node described in moment according to described Switching Power Supply main circuit
Instant amplitude value, adjusts described resistor network and accesses the resistance value in described antihunt circuit and/or adjust described electricity
Content network accesses the capacitance in described antihunt circuit.This antihunt circuit is programmable RC circuit, and it includes
One resistor network and a capacitance network, resistor network is made up of multiple resistance, and capacitance network is by multiple capacitance group
Become；Can be changed by the connected mode changing multiple resistance and access the resistance value of antihunt circuit and/or by changing
The connected mode becoming multiple electric capacity changes the capacitance accessing antihunt circuit.
The embodiment of the present invention is improved switching node by the internal structure of transformation integrated circuit and is crossed punching；Concrete,
RC antihunt circuit it is placed on the inside of integrated circuit by the embodiment of the present invention and increases debugging circuit, once debugging
Module automatically detects the instant amplitude value of switching node and exceedes specification requirement, the most automatically adjusts RC antihunt circuit
Resistance value and capacitance, and then adjust the overshoot amplitude of switching node, until being adjusted to switching node
Instant amplitude value reaches specification requirement, completes the self-adaptative adjustment of overshoot amplitude, improves switching power circuit
Debugging efficiency.
Concrete, debug circuit described in the second embodiment of the present invention and include amplitude detection circuit；Accordingly,
Step 301, including:
Step 3011, utilizes described amplitude detection circuit to start moment to detect Switching Power Supply main circuit, described
The instant amplitude value of the switching node of Switching Power Supply main circuit.
In the first embodiment of the present invention, amplitude detection circuit 31 detects the instantaneous width of switching node 104 automatically
Angle value, if the instant amplitude value of described switching node is more than predetermined amplitude value, shows that this switching node 104 is deposited
At overshoot voltage, the first switching tube 105 or second switch pipe 106 may be damaged, the most also can affect attached
Other near circuit.
Further, debug circuit described in the second embodiment of the present invention also to include adjusting circuit；Accordingly,
Step 302, including:
Step 3021, if the instant amplitude value of described switching node that described amplitude detection circuit detects is more than
Predetermined amplitude value, described amplitude detection circuit sends control signal to described adjustment circuit；
Step 3022, described adjustment circuit adjusts described resistor network according to described control signal and accesses described resistance
Resistance value in Buddhist nun's circuit and/or adjust described capacitance network and access the capacitance in described antihunt circuit.
In the above embodiment of the present invention, amplitude detection circuit is connected with switching node, Switching Power Supply main circuit
The when of startup, the instantaneous amplitude of amplitude detection circuit detection switching node SW, if it exceeds specification is preset
Value, then send out control signal and be given to adjust circuit, adjust circuit and adjust connecing of antihunt circuit according to its control signal
Enter resistance value and/or access capacitance, until the instantaneous amplitude of switching node SW fall into normal specifications scope it
In.
Concrete, step 3022 in the second embodiment of the present invention, including:
After described adjustment circuit receives described control signal, adjusted by the value revising the first depositor
Described resistor network is accessed the resistance value in described antihunt circuit and/or is adjusted by the value revising the second depositor
Whole described capacitance network accesses the capacitance in described antihunt circuit.
In the second embodiment of the present invention, adjust circuit and controlled and each by the value revising the first depositor
Multiple switches that resistance connects thus trim described resistor network and access the resistance value in described antihunt circuit；With
Sample, adjust circuit by the value revising the second depositor control multiple switches of being connected with each electric capacity from
And trim described capacitance network and access the capacitance in described antihunt circuit.
May one it should be noted that adjust that circuit 302 adjusts during resistance value and/or capacitance
Secondary just adjust successfully, therefore be both needed to restart Switching Power Supply main circuit after adjusting every time, re-start another
The instantaneous amplitude detection of secondary switching node judges and the adjustment of antihunt circuit, concrete, the second of the present invention
The method that embodiment provides also includes: described adjustment the regulation of electrical circuit access the resistance value in described antihunt circuit and/
Or after adjusting the capacitance accessed in described antihunt circuit, described amplitude detection circuit again detect described in open
Close electric power main circuit and start the instant amplitude value of switching node described in moment, if described Switching Power Supply main circuit opens
Described in dynamic moment, the instant amplitude value of switching node is more than described predetermined amplitude value, and described adjustment the regulation of electrical circuit connects
Enter the resistance value in described antihunt circuit and/or the capacitance that accesses in described antihunt circuit until described amplitude is examined
The described Switching Power Supply main circuit that slowdown monitoring circuit detects starts the instant amplitude value of switching node described in moment and is less than
Described predetermined amplitude value.
Such as, as shown in Figure 4, the second embodiment of the present invention provides specifically comprising the following steps that of method
Step 401, Switching Power Supply main circuit starts to start.
Step 402, detection module detects SW foot overshoot amplitude automatically, including start moment amplitude and
The amplitude that SW foot normally works.
Step 403, it is judged that the range value of SW foot, if it exceeds specification requirement amplitude then performs step 404；
Otherwise, step 408 is performed.
Step 404, testing circuit transmitting control commands, open the depositor of IC interior, find RC
The value of the depositor that circuit is corresponding.
Step 405, the value of amendment RC depositor adjusts RC value automatically, thus adjusts SW foot amplitude.
Step 406, keeps the value of depositor, and comes into force；
Step 407, is again started up circuit, and performs step 402.
Step 408, if the SW foot amplitude measured meets the requirements, then preserves current RC circuit corresponding
The value of register configuration.
Step 409, completes the configuration of self adaptation RC correspondence depositor.
Step 410, integrated circuit starts normally to work.
To sum up, the second embodiment of the present invention provides a kind of switching node SW improving switching power circuit to open
The method of the instantaneous amplitude of dynamic moment, improves switching node SW mistake by the internal structure of transformation integrated circuit
Punching.The embodiment of the present invention is placed on the inside of integrated circuit RC antihunt circuit, and increases rf amplitude detection electricity
Road, once testing circuit automatically detects switching node SW and exceedes specification, the most automatically revises damping
The value of the RC of circuit, and then adjust the overshoot amplitude of SW, until the SW amplitude being adjusted to reaches specification
Book requirement, completes the self-adaptative adjustment of overshoot amplitude.The embodiment that the present invention provides is without manually debugging survey
Examination, is completed the debugging process of switching node completely by IC interior, reduces the difficulty of debugging and design
Cost.
The above is the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from principle of the present invention, it is also possible to make some improvements and modifications,
These improvements and modifications also should be regarded as protection scope of the present invention.
Claims (9)
1. a switching power circuit, it is characterised in that including:
Switching Power Supply main circuit, described Switching Power Supply main circuit includes switching node；
Being connected to the antihunt circuit between described switching node and ground, described antihunt circuit includes multiple resistor group
The resistor network become and the capacitance network of multiple electric capacity composition；
Debugging circuit, described debugging circuit is for starting switching node described in moment according to Switching Power Supply main circuit
Instant amplitude value, adjust described resistor network and access the resistance value in described antihunt circuit and/or adjust described
Capacitance network accesses the capacitance in described antihunt circuit.
2. switching power circuit as claimed in claim 1, it is characterised in that described debugging circuit includes:
Amplitude detection circuit, described amplitude detection circuit is used for detecting Switching Power Supply main circuit and starts moment, institute
State the instant amplitude value of the switching node of Switching Power Supply main circuit；
Adjusting circuit, described adjustment circuit is more than predetermined amplitude for the instant amplitude value when described switching node
During value, adjust described resistor network and access the resistance value in described antihunt circuit and/or adjust described capacitance network
Access the capacitance in described antihunt circuit.
3. switching power circuit as claimed in claim 2, it is characterised in that described switching power circuit is also
Including: the first depositor and the second depositor；
Described adjustment circuit is additionally operable to adjust described resistor network by the value revising described first depositor and connects
Enter the resistance value in described antihunt circuit and/or adjust described electric capacity by the value revising described second depositor
Capacitance in antihunt circuit described in network insertion.
4. switching power circuit as claimed in claim 2 or claim 3, it is characterised in that described adjustment circuit is adjusted
After resistance value in the described antihunt circuit of whole access and/or the capacitance in the adjustment described antihunt circuit of access,
Described amplitude detection circuit again detects described Switching Power Supply main circuit and starts the instantaneous of switching node described in moment
Range value, if described Switching Power Supply main circuit starts the instant amplitude value of switching node described in moment more than described
Predetermined amplitude value, described adjustment the regulation of electrical circuit accesses the resistance value in described antihunt circuit and/or accesses described resistance
Capacitance in Buddhist nun's circuit is until the described Switching Power Supply main circuit that described amplitude detection circuit detects starts wink
Between the instant amplitude value of described switching node less than described predetermined amplitude value.
5. the method switching power circuit as described in any one of claim 1-4 debugged, its
Being characterised by, described method includes:
Debugging electric circuit inspection Switching Power Supply main circuit starts moment, the switching node of described Switching Power Supply main circuit
Instant amplitude value；
Described debugging circuit starts the instantaneous amplitude of switching node described in moment according to described Switching Power Supply main circuit
Value, adjusts described resistor network and accesses the resistance value in described antihunt circuit and/or adjust described capacitance network and connect
Enter the capacitance in described antihunt circuit.
6. method as claimed in claim 5, it is characterised in that described debugging circuit includes amplitude detection electricity
Road；
Detection Switching Power Supply main circuit starts moment, the instantaneous width of the switching node of described Switching Power Supply main circuit
The step of angle value, including:
Described amplitude detection circuit is utilized to start moment, described Switching Power Supply master to detect Switching Power Supply main circuit
The instant amplitude value of the switching node of circuit.
7. method as claimed in claim 6, it is characterised in that described debugging circuit also includes adjusting circuit；
Start the instant amplitude value of switching node described in moment according to described Switching Power Supply main circuit, adjust described
Resistor network accesses the resistance value in described antihunt circuit and/or adjusts described capacitance network access described damping electricity
The step of the capacitance in road, including:
If the instant amplitude value of the described switching node that described amplitude detection circuit detects is more than predetermined amplitude value,
Described amplitude detection circuit sends control signal to described adjustment circuit；
Described adjustment circuit adjusts described resistor network according to described control signal and accesses in described antihunt circuit
Resistance value and/or adjust described capacitance network and access the capacitance in described antihunt circuit.
8. method as claimed in claim 7, it is characterised in that described adjustment circuit controls letter according to described
Number adjust described resistor network access the resistance value in described antihunt circuit and/or adjust described capacitance network and access
The step of the capacitance in described antihunt circuit, including:
After described adjustment circuit receives described control signal, adjusted by the value revising the first depositor
Described resistor network is accessed the resistance value in described antihunt circuit and/or is adjusted by the value revising the second depositor
Whole described capacitance network accesses the capacitance in described antihunt circuit.
9. method as claimed in claim 7 or 8, it is characterised in that described method also includes:
Described adjustment the regulation of electrical circuit accesses the resistance value in described antihunt circuit and/or adjusts access described damping electricity
After capacitance in road, described amplitude detection circuit again detects described Switching Power Supply main circuit and starts moment
The instant amplitude value of described switching node, if described Switching Power Supply main circuit starts switching node described in moment
Instant amplitude value is more than described predetermined amplitude value, and described adjustment the regulation of electrical circuit accesses the electricity in described antihunt circuit
Resistance and/or access capacitance in described antihunt circuit until described amplitude detection circuit detect described in open
Close electric power main circuit and start the instant amplitude value of switching node described in moment less than described predetermined amplitude value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610423226.1A CN105958812B (en) | 2016-06-15 | 2016-06-15 | Switching power circuit and the method debugged to switching power circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610423226.1A CN105958812B (en) | 2016-06-15 | 2016-06-15 | Switching power circuit and the method debugged to switching power circuit |
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| CN105958812B CN105958812B (en) | 2018-05-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106452065A (en) * | 2016-12-06 | 2017-02-22 | 上海传英信息技术有限公司 | Driving circuit |
| CN106953511A (en) * | 2017-04-28 | 2017-07-14 | 昆山龙腾光电有限公司 | Switching power circuit and its adjusting method |
| CN107749277A (en) * | 2017-10-16 | 2018-03-02 | 维沃移动通信有限公司 | A kind of control method of screen intensity, device and mobile terminal |
| CN109891731A (en) * | 2016-10-26 | 2019-06-14 | 三菱电机株式会社 | Power conversion device |
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| CN109891731A (en) * | 2016-10-26 | 2019-06-14 | 三菱电机株式会社 | Power conversion device |
| CN106452065A (en) * | 2016-12-06 | 2017-02-22 | 上海传英信息技术有限公司 | Driving circuit |
| CN106452065B (en) * | 2016-12-06 | 2019-09-17 | 上海传英信息技术有限公司 | Driving circuit |
| CN106953511A (en) * | 2017-04-28 | 2017-07-14 | 昆山龙腾光电有限公司 | Switching power circuit and its adjusting method |
| CN106953511B (en) * | 2017-04-28 | 2019-06-21 | 昆山龙腾光电有限公司 | Switching power circuit and its adjusting method |
| CN107749277A (en) * | 2017-10-16 | 2018-03-02 | 维沃移动通信有限公司 | A kind of control method of screen intensity, device and mobile terminal |
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