CN206805192U - One kind switch controling adjustment device - Google Patents
One kind switch controling adjustment device Download PDFInfo
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- CN206805192U CN206805192U CN201720725240.7U CN201720725240U CN206805192U CN 206805192 U CN206805192 U CN 206805192U CN 201720725240 U CN201720725240 U CN 201720725240U CN 206805192 U CN206805192 U CN 206805192U
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- 238000001514 detection method Methods 0.000 claims abstract description 31
- 238000001914 filtration Methods 0.000 claims description 9
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- 230000001939 inductive effect Effects 0.000 claims description 3
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- 230000008569 process Effects 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model discloses one kind to switch controling adjustment device, including on-off circuit and control circuit, on-off circuit includes switching tube and output inductor, and control circuit includes voltage detecting circuit, power stage circuit, error correction circuit, comparator, turn-on time generation circuit, logic control circuit；Error correction circuit is used for the voltage feedback signal that receiving voltage detection circuit is fed back, and according to reference voltage output error correction voltage, the inverting input receiving voltage feedback signal of comparator, its in-phase input end receives the difference of reference voltage and error correction voltage, and exports comparison signal；Turn-on time generation circuit is used to provide ON time signal, and logic control circuit is according to comparison signal and ON time signal output logic control signal to power stage circuit.Regulation process of the present utility model passes through error correction so that the precision of switch-mode regulation is higher, while efficiency high.
Description
Technical field
It the utility model is related to switching regulaor, more particularly to a kind of switch controling adjustment device.
Background technology
In the control mode of switching regulaor, COT control models have obtained extensively should due to the advantages of its is a large amount of
With.In COT control models, switching regulation circuit can not need loop compensation networks, so that circuit design is more
Simply.Being additionally, since the switching regulation circuit being controlled using COT control models can need not utilize error to amplify
Voltage is adjusted device.Thus, there is more preferable transient response performance using the switching regulation circuit of COT control models.
In addition, if switching regulation circuit is in PFM patterns under light condition, PWM patterns are under heavy condition, then it is sharp
With COT control models, transition of the switching regulation circuit from the PWM mode under PFM patterns to the heavy condition under light condition
To be more smooth.Because COT control models have above-mentioned advantage and are not limited to above-mentioned advantage, thus, COT control models exist
It is widely applied in the power supply technology of switching regulation circuit.But current switch controls to adjust the precision of device not
It is high.
Utility model content
For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of switch controling adjustment device,
It can solve the problems, such as that degree of regulation is not high.
The purpose of this utility model is realized using following technical scheme：
One kind switch controling adjustment device, including on-off circuit and control circuit, the on-off circuit include switching tube and
Output inductor, control circuit include voltage detecting circuit, power stage circuit, error correction circuit, comparator, ON time production
Raw circuit, logic control circuit；The error correction circuit is used for the voltage feedback signal that receiving voltage detection circuit is fed back,
And according to reference voltage output error correction voltage, the inverting input receiving voltage feedback signal of comparator, it is the same as mutually defeated
Enter the difference that end receives reference voltage and error correction voltage, and export comparison signal；Turn-on time generation circuit is led for offer
Logical time signal, logic control circuit are electric to power stage according to comparison signal and ON time signal output logic control signal
Road；The voltage detecting circuit includes detection resistance, and detection resistance has first end and the second end, and first end receives and flows through inductance
The inductive current of device, voltage detecting circuit distinguish detection switch pipe turn-on and turn-off moment detection resistance both ends voltage drop with
Obtain voltage feedback signal.
Preferably, switching tube includes upper switch pipe and lower switch pipe, and upper switch pipe has first end and the second end, described
First end receives input voltage, and lower switch pipe has first end and the second end, and the first end is coupled to the second of upper switch pipe
End, second end are coupled to reference ground, the switching tube turn-on and turn-off moment for upper switch pipe the turn-on and turn-off moment or under
The turn-on and turn-off moment of switching tube.
Preferably, voltage detecting circuit also includes first switch, has first end and the second end, and first end is coupled to detection
Second end of resistance；Second switch, has first end and the second end, and first end is coupled to the second end of first switch, and second
End is connected to reference ground；3rd switch, has first end and the second end, first end is connected to the first end of detection resistance；4th
Switch, has first end and the second end, and first end is coupled to the first end of the 3rd switch；First electric capacity, is coupled to first switch
The second end and the 3rd switch the second end between；5th switch, has first end and the second end, and first end is coupled to detection electricity
Second end of resistance；6th switch, there is first end and the second end, first end is coupled to the second end of the 5th switch, and the second end connects
It is connected to reference ground；7th switch, has first end and the second end, first end is connected to the first end of detection resistance；8th switch,
With first end and the second end, first end is coupled to the second end of the 7th switch, and the second end is coupled to the second of the 4th switch
End；Second electric capacity, it is coupled between the second end of the 5th switch and the second end of the 7th switch；And the 3rd electric capacity, have the
One end and the second end, first end are coupled to the second end of the 4th switch and as the output end of average voltage detecting circuit to carry
For equal threshold voltage, the second end is connected to reference ground.
Preferably, error correction circuit includes subtraction filter circuit and reference voltage regulation circuit, the subtraction filtered electrical
Road receives the voltage feedback signal and the reference voltage, and provides subtraction filtering signal；The reference voltage adjusts circuit
The subtraction filtering signal is received, and the error correction voltage is provided.
Compared with prior art, the beneficial effects of the utility model are：
Regulation process of the present utility model passes through error correction so that the precision of switch-mode regulation is higher, while efficiency high.
Brief description of the drawings
Fig. 1 is a kind of function structure chart for switching controling adjustment device of the present utility model.
Embodiment
Below, with reference to accompanying drawing and embodiment, the utility model is described further：
Referring to Fig. 1, the utility model provides a kind of switch controling adjustment device, and it includes on-off circuit and control circuit,
On-off circuit receives input voltage and converts input voltage into output voltage, on-off circuit by the turn-on and turn-off of switching tube
Any suitable circuit topological structure, such as synchronous or asynchronous buck on-off circuit, forward converter can be used.
Switching tube can be any controllable semiconductor switch device, such as igbt.On-off circuit includes switching tube and defeated
Go out inductor, control circuit includes voltage detecting circuit, power stage circuit, error correction circuit, comparator, ON time and produced
Circuit, logic control circuit；The error correction circuit is used for the voltage feedback signal that receiving voltage detection circuit is fed back, with
And according to reference voltage output error correction voltage, the inverting input receiving voltage feedback signal of comparator, its homophase input
End receives the difference of reference voltage and error correction voltage, and exports comparison signal；Turn-on time generation circuit is used to provide conducting
Time signal, logic control circuit is according to comparison signal and ON time signal output logic control signal to power stage circuit；
The voltage detecting circuit includes detection resistance, and detection resistance has first end and the second end, and first end receives and flows through inductor
Inductive current, voltage detecting circuit respectively detection switch pipe in the voltage drop at turn-on and turn-off moment detection resistance both ends to obtain
Take voltage feedback signal.
The real-time voltage at detection resistance both ends is directly proportional with the real-time current for flowing through detection resistance, and its scale factor is to examine
The resistance of measuring resistance.
In one embodiment, switching tube includes upper switch pipe and lower switch pipe, and upper switch pipe has first end and second
End, the first end receive input voltage, and lower switch pipe has first end and the second end, and the first end is coupled to upper switch
Second end of pipe, second end are coupled to reference ground, and the switching tube turn-on and turn-off moment is the turn-on and turn-off of upper switch pipe
Moment or the turn-on and turn-off moment of lower switch pipe.
Preferably, power detection circuit also includes first switch, there is first end and the second end, first end is coupled to detection
Second end of resistance；Second switch, has first end and the second end, and first end is coupled to the second end of first switch, and second
End is connected to reference ground；3rd switch, has first end and the second end, first end is connected to the first end of detection resistance；4th
Switch, has first end and the second end, and first end is coupled to the first end of the 3rd switch；First electric capacity, is coupled to first switch
The second end and the 3rd switch the second end between；5th switch, has first end and the second end, and first end is coupled to detection electricity
Second end of resistance；6th switch, there is first end and the second end, first end is coupled to the second end of the 5th switch, and the second end connects
It is connected to reference ground；7th switch, has first end and the second end, first end is connected to the first end of detection resistance；8th switch,
With first end and the second end, first end is coupled to the second end of the 7th switch, and the second end is coupled to the second of the 4th switch
End；Second electric capacity, it is coupled between the second end of the 5th switch and the second end of the 7th switch；And the 3rd electric capacity, have the
One end and the second end, first end are coupled to the second end of the 4th switch and as the output end of average voltage detecting circuit to carry
For equal threshold voltage, the second end is connected to reference ground.
Further, error correction circuit includes subtraction filter circuit and reference voltage regulation circuit, the subtraction filtering
Circuit receives the voltage feedback signal and the reference voltage, and provides subtraction filtering signal；Reference voltage regulation circuit connects
The subtraction filtering signal is received, and error correction voltage is provided.Subtraction filtering really includes subtraction circuit and prior art is normal
The low-pass filter circuit seen.Subtraction circuit is by four resistors and operational amplifier.Low-pass filter circuit includes filter resistor
And filter condenser.The first terminal of filter resistor receives subtraction signal；The first terminal of capacitor is coupled to resistor
Second terminal, and its Second terminal is connected to the ground, wherein, the first terminal of capacitor and the Second terminal of resistor form low pass
The output end of filter circuit, export subtraction filtering signal.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
Corresponding change and deformation, and all these changes and deformation should all belong to the protection of the utility model claims
Within the scope of.
Claims (4)
1. one kind switch controling adjustment device, it is characterised in that including on-off circuit and control circuit, the on-off circuit includes
Switching tube and output inductor, control circuit include voltage detecting circuit, power stage circuit, error correction circuit, comparator, led
Logical time generation circuit, logic control circuit；The error correction circuit is used for the voltage that receiving voltage detection circuit is fed back
Feedback signal, and according to reference voltage output error correction voltage, the inverting input receiving voltage feedback signal of comparator,
Its in-phase input end receives the difference of reference voltage and error correction voltage, and exports comparison signal；Turn-on time generation circuit is used
In providing ON time signal, logic control circuit is according to comparison signal and ON time signal output logic control signal to work(
Rate level circuit；The voltage detecting circuit includes detection resistance, and detection resistance has first end and the second end, first end receiving stream
Inductive current through inductor, voltage detecting circuit distinguish electricity of the detection switch pipe at turn-on and turn-off moment detection resistance both ends
Pressure drop is to obtain voltage feedback signal.
2. switch controling adjustment device as claimed in claim 1, it is characterised in that switching tube includes upper switch pipe and opened with
Guan Guan, upper switch pipe have a first end and the second end, and the first end receives input voltage, lower switch pipe have first end and
Second end, the first end are coupled to the second end of upper switch pipe, and second end is coupled to reference ground, switching tube conducting and pass
The disconnected moment is the turn-on and turn-off moment of upper switch pipe or the turn-on and turn-off moment of lower switch pipe.
3. switch controling adjustment device as claimed in claim 1, it is characterised in that voltage detecting circuit is also opened including first
Close, there is first end and the second end, first end is coupled to the second end of detection resistance；Second switch, there is first end and the
Two ends, first end are coupled to the second end of first switch, and the second end is connected to reference ground；3rd switch, has first end and the
Two ends, first end are connected to the first end of detection resistance；4th switch, has first end and the second end, and first end is coupled to the
The first end of three switches；First electric capacity, it is coupled between the second end of first switch and the second end of the 3rd switch；5th opens
Close, there is first end and the second end, first end is coupled to the second end of detection resistance；6th switch, has first end and second
End, first end are coupled to the second end of the 5th switch, and the second end is connected to reference ground；7th switch, has first end and second
End, first end are connected to the first end of detection resistance；8th switch, there is first end and the second end, first end to be coupled to the 7th
Second end of switch, the second end are coupled to the second end of the 4th switch；Second electric capacity, be coupled to the 5th switch the second end with
Between second end of the 7th switch；And the 3rd electric capacity, there is first end and the second end, first end is coupled to the of the 4th switch
Two ends and as the output end of average voltage detecting circuit to provide equal threshold voltage, the second end is connected to reference ground.
4. switch controling adjustment device as claimed in claim 1, it is characterised in that error correction circuit includes subtraction filtered electrical
Road and reference voltage regulation circuit, the subtraction filter circuit receives the voltage feedback signal and the reference voltage, and carries
For subtraction filtering signal；The reference voltage regulation circuit receives the subtraction filtering signal, and provides the error correction electricity
Pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720725240.7U CN206805192U (en) | 2017-06-20 | 2017-06-20 | One kind switch controling adjustment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720725240.7U CN206805192U (en) | 2017-06-20 | 2017-06-20 | One kind switch controling adjustment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206805192U true CN206805192U (en) | 2017-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720725240.7U Expired - Fee Related CN206805192U (en) | 2017-06-20 | 2017-06-20 | One kind switch controling adjustment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206805192U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115919226A (en) * | 2023-01-16 | 2023-04-07 | 芜湖美的智能厨电制造有限公司 | Position detection method and circuit of dishwasher shunt valve and dishwasher |
-
2017
- 2017-06-20 CN CN201720725240.7U patent/CN206805192U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115919226A (en) * | 2023-01-16 | 2023-04-07 | 芜湖美的智能厨电制造有限公司 | Position detection method and circuit of dishwasher shunt valve and dishwasher |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171226 Termination date: 20190620 |
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| CF01 | Termination of patent right due to non-payment of annual fee |