CN206879150U - A kind of chop control linear switch constant current and constant power circuit - Google Patents
A kind of chop control linear switch constant current and constant power circuit Download PDFInfo
- Publication number
- CN206879150U CN206879150U CN201720787071.XU CN201720787071U CN206879150U CN 206879150 U CN206879150 U CN 206879150U CN 201720787071 U CN201720787071 U CN 201720787071U CN 206879150 U CN206879150 U CN 206879150U
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- Prior art keywords
- constant current
- circuit
- comparison amplifier
- copped wave
- constant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
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Abstract
The utility model discloses a kind of chop control linear switch constant current and constant power circuit, including：Rectification circuit and flow control circuit, flow control circuit includes copped wave comparison amplifier A, constant current comparison amplifier B and constant current tube Q1, copped wave comparison amplifier A output end is connected with constant current comparison amplifier B electrode input end, constant current comparison amplifier B negative input is connected with constant current tube Q1 source electrode, and constant current comparison amplifier B output end is connected with constant current tube Q1 grid；Constant current tube Q1 drain electrode is connected with LED negative pole, and LED positive pole and the output end of rectification circuit connect；Constant current tube Q1 source electrode is by examining leakage resistance R4 ground connection；Copped wave comparison amplifier A negative input is connected by the output end of resistance R1 and rectification circuit, and is also grounded by resistance R2.The utility model makes linear constant current circuit accomplish invariable power, tunable optical, overvoltage protection while the power consumption that can reduce Q1 using wave chopping technology.
Description
Technical field
It the utility model is related to electronic drive circuit control technology field, and in particular to a kind of chop control linear switch is permanent
Flow invariable power circuit.
Background technology
LED is as a kind of efficient new light sources, because with long lifespan, energy consumption is low, energy-conserving and environment-protective, is just being widely used in each
Field illuminates.
When LED is as lamp light source, the service life of light fixture depends not only on LED lamp bead in itself, in addition to driving
Power supply, in current application scheme, the LED lamp life-span depends primarily on driving power, and main driving power type is：1) switch
Power supply；2) linear constant current power supply；3) capacitance-resistance power supply.
Linear constant current driving power is cost-effective, but there is also some it is fatal the shortcomings that, adjusted when line voltage raises
Pipe Q1 pressure drops raise, and heating is serious, and input power also fluctuates with voltage ripple of power network, has a strong impact on the reliable of linear power supply
Property.
Utility model content
In order to solve the above-mentioned technical problem, the utility model proposes a kind of chop control linear switch constant current and constant power electricity
Road, it makes linear constant current circuit accomplish invariable power, tunable optical, overvoltage protection while the power consumption that can reduce Q1 using wave chopping technology.
In order to achieve the above object, the technical solution of the utility model is as follows：
A kind of chop control linear switch constant current and constant power circuit, including：Rectification circuit, the input of rectification circuit and city
Electrical connection, in addition to：Flow control circuit, flow control circuit include：Copped wave comparison amplifier A, constant current comparison amplifier B and constant current tube
Q1, copped wave comparison amplifier A output end are connected with constant current comparison amplifier B electrode input end, constant current comparison amplifier B's
Negative input is connected with constant current tube Q1 source electrode, and constant current comparison amplifier B output end is connected with constant current tube Q1 grid；
Constant current tube Q1 drain electrode is connected with LED negative pole, and LED positive pole and the output end of rectification circuit connect；
Constant current tube Q1 source electrode is by examining leakage resistance R4 ground connection；
Copped wave comparison amplifier A negative input is connected by the output end of resistance R1 and rectification circuit, and is also passed through
Resistance R2 is grounded.
The utility model makes linear constant current circuit accomplish invariable power, tunable optical, overvoltage protection while energy using wave chopping technology
Reduce Q1 power consumption.
On the basis of above-mentioned technical proposal, following improvement can be also done：
As preferable scheme, copped wave comparison amplifier A cathode power supply input pin is grounded by electric capacity C1, copped wave ratio
Negative power supply input pin compared with amplifier A is directly grounded.
It is more stable using above-mentioned preferable scheme, circuit.
As preferable scheme, copped wave comparison amplifier A electrode input end connects+2V voltages.
It is more stable using above-mentioned preferable scheme, circuit.
As preferable scheme, copped wave comparison amplifier A output+1V signals input constant current comparison amplifier B positive pole is defeated
Enter end.
It is more stable using above-mentioned preferable scheme, circuit.
As preferable scheme, copped wave comparison amplifier A cathode power supply input pin is managed by JFET and rectification circuit
Output end connection.
It is more stable using above-mentioned preferable scheme, circuit.
As preferable scheme, copped wave comparison amplifier A negative input is connected with pwm circuit.
Using above-mentioned preferable scheme, PWM light modulations are carried out.
As preferable scheme, resistance R2 is variable resistor.
Using above-mentioned preferable scheme, copped wave light modulation linear light sorurce can be used as by changing resistance R2 resistance.
As preferable scheme, connected between rectification circuit and civil power by multilevel decompression circuit, multilevel decompression circuit
For carrying out multilevel decompression to civil power.
It is more stable using above-mentioned preferable scheme, performance.
As preferable scheme, connected between rectification circuit and civil power by mu balanced circuit, mu balanced circuit is used to keep
Voltage is steady.
It is more stable using above-mentioned preferable scheme, performance.
As preferable scheme, connected between rectification circuit and flow control circuit by battery.
Using above-mentioned preferable scheme, performance is more stable, even if civil power disconnects suddenly, power supply will not also suddenly disappear, and protects
Demonstrate,prove the stability of circuit.
Brief description of the drawings
Fig. 1 is that a kind of structure for chop control linear switch constant current and constant power circuit that the utility model embodiment provides is shown
One of be intended to.
Fig. 2 is that a kind of structure for chop control linear switch constant current and constant power circuit that the utility model embodiment provides is shown
The two of intention.
Fig. 3 is the internal structure schematic diagram for the flow control circuit that the utility model embodiment provides.
Fig. 4 is the attachment structure schematic diagram for the copped wave comparison amplifier A that the utility model embodiment provides.
Fig. 5 be the utility model embodiment provide relatively obtained by copped wave comparison amplifier A and input voltage fluctuation
Proportional dutycycle waveform.
Wherein：1 rectification circuit, 2 flow control circuits.
Embodiment
Describe preferred embodiment of the present utility model in detail below in conjunction with the accompanying drawings.
In order to reach the purpose of this utility model, a kind of some of them of chop control linear switch constant current and constant power circuit
In embodiment,
As Figure 1-4, a kind of chop control linear switch constant current and constant power circuit includes：Rectification circuit 1 and flow control electricity
Road 2, the input of rectification circuit 1 electrically connect with city, and after the rectification of rectification circuit 1, the output end of rectification circuit 1 is civil power
Vin positive poles, Vin negative poles ground connection.
Flow control circuit 2 includes：Copped wave comparison amplifier A, constant current comparison amplifier B and constant current tube Q1, copped wave are relatively put
Big device A output end is connected with constant current comparison amplifier B electrode input end, constant current comparison amplifier B negative input and
Constant current tube Q1 source electrode connection, constant current comparison amplifier B output end are connected with constant current tube Q1 grid；
Constant current tube Q1 drain electrode is connected with LED negative pole, and LED positive pole and the output end of rectification circuit connect；
Constant current tube Q1 source electrode is by examining leakage resistance R4 ground connection；
Copped wave comparison amplifier A negative input is connected by the output end of resistance R1 and rectification circuit, and is also passed through
Resistance R2 is grounded, and resistance R2 is variable resistor, and copped wave light modulation linear power supply can be used as by changing R2 resistances.
Copped wave comparison amplifier A cathode power supply input pin is grounded by electric capacity C1, copped wave comparison amplifier A negative pole
Power input pin is directly grounded.
Copped wave comparison amplifier A electrode input end connects+2V voltages.
Copped wave comparison amplifier A cathode power supply input pin is managed by JFET and is connected with the output end of rectification circuit 1.
Copped wave comparison amplifier A negative input is connected with pwm circuit, PWM can be used as to dim.
As Figure 1-4, connected in figure with each pin of flow control circuit 2, flow control circuit 2 pin 1 connection LED101
Negative pole, the pin 2 of control circuit 2 connection inspection leakage resistance R4, the pin 3 of flow control circuit 2 connection resistance R1 to Vin positive poles, are connected simultaneously
Resistance R2 to Vin negative poles, the pin 4 of control circuit 2 connection Vin negative poles, the pin 5 of control circuit 2 connection Vin positive poles, flow control circuit 2
Pin 6 connects electric capacity C1 to Vin negative poles.
As shown in Fig. 2 in order that flow control circuit 2 has copped wave function, the pin 3 of flow control circuit 2 connects resistance R1 and arrived respectively
Vin positive poles, resistance R2 to Vin negative poles are connected, detect Vin voltage changes, relatively obtain and input by copped wave comparison amplifier A
The proportional dutycycle waveform of voltage pulsation, as shown in Fig. 5 oscillogram.
As long as fixed R1, R2 resistance of over-voltage protecting function, copped wave comparison amplifier A negative input (i.e. pin 3) are defeated
Enter Vin voltage signals and copped wave comparison amplifier A benchmark compare generation 100HZ overvoltage duty cycle signals, such as Fig. 5 oscillogram institute
Show.
Simulation light modulation implementation method is fixed resistance R1 resistances, regulation resistance R2 resistances, is produced by copped wave comparison amplifier A
Raw 100HZ dimming duty cycle signals, as shown in Fig. 5 oscillogram.
PWM dims the negative input (i.e. pin 3) that copped wave comparison amplifier A is directly inputted by PWM+2V signals, cuts
Ripple comparison amplifier A output ends obtain the signal with PWM input signal equal duty cycles.
Copped wave comparison amplifier A output+1V signals input constant current comparison amplifier B electrode input end, constant current tube Q1's
Source electrode connects resistance R4, and the voltage corresponding with LED101 is produced on resistance R4, is inputted by constant current comparison amplifier B negative poles
End makes constant current tube Q1 be operated in linear constant current and switch invariable power state compared with its benchmark+1V.
A kind of chop control linear switch constant current and constant power circuit of the utility model has the beneficial effect that：
Linear constant current circuit is set to accomplish invariable power, tunable optical, mistake using wave chopping technology 1. the utility model provides one kind
Pressure is protected while can reduce the drive circuit of constant current tube Q1 power consumptions, therefore the also known as linear permanent power frequency switch stream perseverance of the utility model
Power circuit.
2. copped wave comparison amplifier A electrode input end connection reference level+2V, copped wave comparison amplifier A negative pole are defeated
Enter end connection Vin with benchmark to compare, change the different duty output for producing 100HZ frequencies by Vin voltage levels, copped wave is compared
Amplifier A output connection constant current comparison amplifiers B benchmark, the Duty ratio control constant current ratio as caused by copped wave comparison amplifier A
Compared with amplifier B, constant current comparison amplifier B electrode input ends connection copped wave comparison amplifier A output end, constant current comparison amplifier
B negative input connection constant current tube Q1 source electrodes, constant current comparison amplifier B output end connection constant current tube Q1 grid.
The utility model is as the linear permanent flow control module biggest advantage that switchs：
With linear constant current invariable power, overvoltage protection can be used as, PWM light modulations can be used as and simulates light modulation, whole constant current
Unit is to be operated in the warbled on off states of 100HZ, really realizes linear switch LED drive power, the utility model has
The advantages of linear power supply, there is the characteristic of Switching Power Supply again, therefore the utility model has broken linear power supply and can be only applied to small work(
Rate LED drives, and can be applied in single channel peak power 50W drivings.
Because utility model works are in linear on off state, output LED current peak value is to maintain constant, LED electricity
Stream size be by duty cycle adjustment, therefore linear multistage application in make power limitation control, brightness adjustment control, overvoltage control when not
The LED sections of phenomenon not worked can be made.
In order to further optimize implementation result of the present utility model, in other embodiment, remaining feature skill
Art is identical, and difference is, is connected between rectification circuit 1 and civil power by multilevel decompression circuit, and multilevel decompression circuit is used
In to civil power progress multilevel decompression.
It is more stable using above-mentioned preferable scheme, performance.
In order to further optimize implementation result of the present utility model, in other embodiment, remaining feature skill
Art is identical, and difference is, is connected between rectification circuit 1 and civil power by mu balanced circuit, and mu balanced circuit is used to keep electricity
Flatten steady.
It is more stable using above-mentioned preferable scheme, performance.
In order to further optimize implementation result of the present utility model, in other embodiment, remaining feature skill
Art is identical, and difference is, is connected between rectification circuit 1 and flow control circuit 2 by battery.
Using above-mentioned preferable scheme, performance is more stable, even if civil power disconnects suddenly, power supply will not also suddenly disappear, and protects
Demonstrate,prove the stability of circuit.
The above is only preferred embodiment of the present utility model, it is noted that for one of ordinary skill in the art
For, on the premise of not departing from the utility model and creating design, various modifications and improvements can be made, these belong to this
The protection domain of utility model.
Claims (10)
1. a kind of chop control linear switch constant current and constant power circuit, including：Rectification circuit, the input of the rectification circuit with
City electrically connects, it is characterised in that also includes：Flow control circuit, the flow control circuit include：Copped wave comparison amplifier A, constant current are compared
Amplifier B and constant current tube Q1, the output end of the copped wave comparison amplifier A and the positive pole of the constant current comparison amplifier B are defeated
Enter end connection, the negative input of the constant current comparison amplifier B is connected with constant current tube Q1 source electrode, and amplification is compared in the constant current
Device B output end is connected with constant current tube Q1 grid；
The drain electrode of the constant current tube Q1 is connected with LED negative pole, and LED positive pole is connected with the output end of the rectification circuit；
The source electrode of the constant current tube Q1 is by examining leakage resistance R4 ground connection；
The negative input of the copped wave comparison amplifier A is connected by resistance R1 with the output end of the rectification circuit, and also
It is grounded by resistance R2.
2. chop control linear switch constant current and constant power circuit according to claim 1, it is characterised in that the copped wave ratio
Cathode power supply input pin compared with amplifier A is grounded by electric capacity C1, and the negative power supply input of the copped wave comparison amplifier A is drawn
Pin is directly grounded.
3. chop control linear switch constant current and constant power circuit according to claim 2, it is characterised in that the copped wave ratio
Electrode input end compared with amplifier A connects+2V voltages.
4. chop control linear switch constant current and constant power circuit according to claim 3, it is characterised in that the copped wave ratio
Compared with the electrode input end that amplifier A output+1V signals input the constant current comparison amplifier B.
5. chop control linear switch constant current and constant power circuit according to claim 4, it is characterised in that the copped wave ratio
Cathode power supply input pin compared with amplifier A is managed by JFET to be connected with the output end of the rectification circuit.
6. the chop control linear switch constant current and constant power circuit according to claim any one of 1-5, it is characterised in that institute
The negative input for stating copped wave comparison amplifier A is connected with pwm circuit.
7. chop control linear switch constant current and constant power circuit according to claim 6, it is characterised in that the resistance R2
For variable resistor.
8. chop control linear switch constant current and constant power circuit according to claim 7, it is characterised in that in the rectification
Connected between circuit and the civil power by multilevel decompression circuit, the multilevel decompression circuit is used to carry out multistage drop to civil power
Pressure.
9. chop control linear switch constant current and constant power circuit according to claim 7, it is characterised in that in the rectification
Connected between circuit and the civil power by mu balanced circuit, the mu balanced circuit is used to keep voltage steady.
10. chop control linear switch constant current and constant power circuit according to claim 7, it is characterised in that described whole
Connected between current circuit and the flow control circuit by battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720787071.XU CN206879150U (en) | 2017-06-30 | 2017-06-30 | A kind of chop control linear switch constant current and constant power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720787071.XU CN206879150U (en) | 2017-06-30 | 2017-06-30 | A kind of chop control linear switch constant current and constant power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206879150U true CN206879150U (en) | 2018-01-12 |
Family
ID=61331761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720787071.XU Withdrawn - After Issue CN206879150U (en) | 2017-06-30 | 2017-06-30 | A kind of chop control linear switch constant current and constant power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206879150U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107148121A (en) * | 2017-06-30 | 2017-09-08 | 苏州菲达旭微电子有限公司 | A kind of chop control linear switch constant current and constant power circuit |
-
2017
- 2017-06-30 CN CN201720787071.XU patent/CN206879150U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107148121A (en) * | 2017-06-30 | 2017-09-08 | 苏州菲达旭微电子有限公司 | A kind of chop control linear switch constant current and constant power circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180112 Effective date of abandoning: 20190111 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180112 Effective date of abandoning: 20190111 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180112 Effective date of abandoning: 20190115 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180112 Effective date of abandoning: 20190115 |