CN105407614A - Dimming control circuit provided with fan and having turn-off function - Google Patents
Dimming control circuit provided with fan and having turn-off function Download PDFInfo
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- CN105407614A CN105407614A CN201510979058.XA CN201510979058A CN105407614A CN 105407614 A CN105407614 A CN 105407614A CN 201510979058 A CN201510979058 A CN 201510979058A CN 105407614 A CN105407614 A CN 105407614A
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- circuit
- fan
- pwm
- resistance
- dimming
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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- Circuit Arrangement For Electric Light Sources In General (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a dimming control circuit provided with a fan and having a turn-off function. The dimming control circuit comprises a light-emitting diode (LED) constant-current source, a pulse width modulation (PWM) reverse circuit, a dimming circuit, a switching circuit, a fan speed regulating circuit, a PWM signal device and an LED lamp with the fan, wherein the constant-current source is connected with the fan speed regulating circuit, the dimming circuit and the switching circuit respectively, and then connected in series with the LED lamp with the fan; the fan speed regulating circuit, the dimming circuit and the switching circuit are connected with the PWM reverse circuit; and the other end of the PWM reverse circuit is connected with the external PWM signal device. The dimming control circuit is simple in structure; the number of components is very small; and the loss and cost are reduced. PWM signals can be reversed through the PWM reverse circuit, so that fan speed and brightness following, dimming and switching-on/off can be performed synchronously. The dimming circuit is stable in dimming linearity and accurate in dimming proportion. The circuit switching-on/off loss is small. PWM speed regulation is realized through the fan speed regulating circuit and a divider resistor.
Description
Technical field
The present invention relates to adjusting control circuit, be specifically related to a kind of adjusting control circuit being provided with fan and turn-off function.
Background technology
Current field of LED illumination constantly develops, along with the lifting of technology, the heat radiation of product, high cost, intellectuality, power source life, energy saving become the development bottleneck in field, so expand a series of Development Scheme around this bottleneck, have to strengthen fin, make the various dimming arrangement of single-chip microcomputer and cut off input power and could realize Push And Release function etc., all unavoidable in high costs, wiring construction complexity, increase loss, dimming arrangement disunity.
Summary of the invention
Main purpose of the present invention is that providing a kind of is provided with the fan of rotating speed and brilliant synchrotron and the adjusting control circuit of turn-off function.By using the light-adjusting module such as general PWM light modulating device and WIFI, DALI on market to be connected with the present invention, rotation speed of the fan can be realized simultaneously and follow brightness adjustment speed and carry out dispelling the heat, realize precise proportions light modulation, realize power supply Push And Release function and can the synchronous parallel connection use of multiple stage product.
The technical solution used in the present invention is: a kind of adjusting control circuit being provided with fan and turn-off function, comprises the LED lamp of LED constant current source, PWM negater circuit, light adjusting circuit, switching circuit, speed regulation circuit for fan, pwm signal device, band fan; Described constant-current source is connected with speed regulation circuit for fan, light adjusting circuit, switching circuit respectively, be connected in series with band fan LED lamp again, wherein speed regulation circuit for fan, light adjusting circuit, switching circuit are connected with PWM negater circuit, and the PWM negater circuit other end is connected with extraneous pwm signal device.
Further, described PWM negater circuit comprises triode Q3, resistance R4, resistance R5, triode Q4, resistance R7, resistance R8; Described Q3 base stage and R4 connect, and collector electrode is connected with R5, and the R5 other end connects ground, and described Q4 base stage is connected with R7, collector electrode and being connected with R8, the connection of the R8 other end.
Further, described light adjusting circuit comprises transport and placing device U2, resistance R9; Described transport and placing device U2 positive pole is connected with R9, and U2 output is connected with negative pole, and the R9 other end connects outside PWM dim signal.
Further, described switching circuit comprises metal-oxide-semiconductor Q2, voltage stabilizing didoe ZD1, triode Q1, resistance R1; Described metal-oxide-semiconductor Q2 drains and LED lamp is contacted connects, Q2 source electrode is connected to ground, described R9 and Q2 grid connects, the R9 other end is connected with VCC, described ZD1 positive pole connecting triode Q2 grid, negative pole is connected to ground, and described Q1 collector electrode is connected with Q2 grid, emitter is connected to ground, base stage is connected with pwm signal.
Further, described speed regulation circuit for fan comprises step-down chip U3A, electric capacity C60, C22, resistance R10, R11, R12, R13, diode D20, inductance L 8A; Described C60 and R13 is in parallel, described R10 and R11 series connection, the FB that one end connects U3A feeds back pin, the other end is connected with reverse pwm signal, and described D20 positive pole connects U3A three-prong, and negative pole connects U3A second pin, described L8A one end connects U3A second pin, the other end connects R13, C60, C22 positive pole respectively, and described R12 one end connects D20 positive pole, C22 negative pole respectively, and the other end connects R10, R13, C60 respectively.
Advantage of the present invention:
Circuit structure of the present invention is simple, and components and parts are considerably less, reduce loss and cost; PWM negater circuit wherein can make pwm signal reverse, makes that fan wind speed is followed with brightness, light modulation and Push And Release can synchronously carry out; Light adjusting circuit wherein, the light modulation linearity is stablized, and light modulation is accurate in scale; Push And Release circuit wherein, loss is little; The additional divider resistance of speed regulation circuit for fan wherein realizes PWM speed governing.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.
Fig. 1 structured flowchart being provided with the adjusting control circuit of fan and turn-off function of the present invention;
Fig. 2 PWM negater circuit of the present invention schematic diagram;
Fig. 3 light adjusting circuit schematic diagram of the present invention;
Fig. 4 switching circuit schematic diagram of the present invention;
Fig. 5 fan alignment circuit of the present invention schematic diagram.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Referring to figs. 1 to Fig. 5, a kind of adjusting control circuit being provided with fan and turn-off function as shown in Figures 1 to 5, comprises the LED lamp of LED constant current source, PWM negater circuit, light adjusting circuit, switching circuit, speed regulation circuit for fan, pwm signal device, band fan; Described constant-current source is connected with speed regulation circuit for fan, light adjusting circuit, switching circuit respectively, be connected in series with band fan LED lamp again, wherein speed regulation circuit for fan, light adjusting circuit, switching circuit are connected with PWM negater circuit, and the PWM negater circuit other end is connected with extraneous pwm signal device.
Described PWM negater circuit comprises triode Q3, resistance R4, resistance R5, triode Q4, resistance R7, resistance R8; Described Q3 base stage and R4 connect, and collector electrode is connected with R5, and the R5 other end connects ground, and described Q4 base stage is connected with R7, collector electrode and being connected with R8, the connection of the R8 other end.
Described light adjusting circuit comprises transport and placing device U2, resistance R9; Described transport and placing device U2 positive pole is connected with R9, and U2 output is connected with negative pole, and the R9 other end connects outside PWM dim signal.
Described switching circuit comprises metal-oxide-semiconductor Q2, voltage stabilizing didoe ZD1, triode Q1, resistance R1; Described metal-oxide-semiconductor Q2 drains and LED lamp is contacted connects, Q2 source electrode is connected to ground, described R9 and Q2 grid connects, the R9 other end is connected with VCC, described ZD1 positive pole connecting triode Q2 grid, negative pole is connected to ground, and described Q1 collector electrode is connected with Q2 grid, emitter is connected to ground, base stage is connected with pwm signal.
Described speed regulation circuit for fan comprises step-down chip U3A, electric capacity C60, C22, resistance R10, R11, R12, R13, diode D20, inductance L 8A; Described C60 and R13 is in parallel, described R10 and R11 series connection, the FB that one end connects U3A feeds back pin, the other end is connected with reverse pwm signal, and described D20 positive pole connects U3A three-prong, and negative pole connects U3A second pin, described L8A one end connects U3A second pin, the other end connects R13, C60, C22 positive pole respectively, and described R12 one end connects D20 positive pole, C22 negative pole respectively, and the other end connects R10, R13, C60 respectively.
With reference to figure 2, PWM negater circuit operation principle as shown in Figure 2:
When the 5V voltage of pwm signal enters R4, the B pole of Q3 is identical with E pole tension, and Q3 is obstructed, R5 ground connection, export reverse 0V, when the 0V of pwm signal enters R4, there is voltage difference B pole and the E pole of Q3, and are greater than 0.7V, Q3 conducting, R5 meets 5V, exports as reverse 5V, thus makes pwm signal reverse when adjusting.Q4, R7, R8 operation principle is identical therewith.
With reference to figure 3, light adjusting circuit operation principle as shown in Figure 3: (voltage follower circuit)
When pwm signal enters R9, carry out voltage follow strengthened by pwm signal by U2 transport and placing device, make pwm signal originally be not easy distortion, the REF that U2 exports is connected with the current reference point of constant-current source, thus changes output current accurately, plays light modulation effect.
With reference to figure 4, switching circuit figure operation principle as shown in Figure 4:
During normal work, VCC voltage enters R1 step-down and enters metal-oxide-semiconductor Q2 grid, through voltage stabilizing didoe ZD1 voltage stabilizing, and driven MOS pipe Q2 conducting, LED lamp is opened and is lit; When reverse PWM is enable, Q1 conducting, voltage R1 being entered mos gate pole is pulled to ground, and metal-oxide-semiconductor cuts, and LED lamp turns off breath and goes out.Therefore, when reverse PWM is enable, LED is closed; When reverse PWM is not enable, LED is opened.
With reference to figure 5, speed regulation circuit for fan figure operation principle as shown in Figure 5:
U3A in this figure is the step-down chip that market leads to, chip the 4th pin FB is feedback pin, can set output voltage size is that fan is powered, in the present invention, at the series connection of chip feedback pin R10, R11 to reverse PWM, when the enable duty ratio of reverse pwm signal occurs to become, enter R10, R11 to feedback pin, thus the output voltage set by changing, rotation speed of the fan is changed, plays adjustment fan speed and wind-force is changed.
Circuit structure of the present invention is simple, and components and parts are considerably less, reduce loss and cost; PWM negater circuit wherein can make pwm signal reverse, makes that fan wind speed is followed with brightness, light modulation and Push And Release can synchronously carry out; Light adjusting circuit wherein, the light modulation linearity is stablized, and light modulation is accurate in scale; Push And Release circuit wherein, loss is little; The additional divider resistance of speed regulation circuit for fan wherein realizes PWM speed governing.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. be provided with an adjusting control circuit for fan and turn-off function, it is characterized in that, comprise the LED lamp of LED constant current source, PWM negater circuit, light adjusting circuit, switching circuit, speed regulation circuit for fan, pwm signal device, band fan; Described constant-current source is connected with speed regulation circuit for fan, light adjusting circuit, switching circuit respectively, be connected in series with band fan LED lamp again, wherein speed regulation circuit for fan, light adjusting circuit, switching circuit are connected with PWM negater circuit, and the PWM negater circuit other end is connected with extraneous pwm signal device.
2. the adjusting control circuit being provided with fan and turn-off function according to claim 1, is characterized in that, described PWM negater circuit comprises triode Q3, resistance R4, resistance R5, triode Q4, resistance R7, resistance R8; Described Q3 base stage and R4 connect, and collector electrode is connected with R5, and the R5 other end connects ground, and described Q4 base stage is connected with R7, collector electrode and being connected with R8, the connection of the R8 other end.
3. the adjusting control circuit being provided with fan and turn-off function according to claim 1, is characterized in that, described light adjusting circuit comprises transport and placing device U2, resistance R9; Described transport and placing device U2 positive pole is connected with R9, and U2 output is connected with negative pole, and the R9 other end connects outside PWM dim signal.
4. the adjusting control circuit being provided with fan and turn-off function according to claim 1, is characterized in that, described switching circuit comprises metal-oxide-semiconductor Q2, voltage stabilizing didoe ZD1, triode Q1, resistance R1; Described metal-oxide-semiconductor Q2 drains and LED lamp is contacted connects, Q2 source electrode is connected to ground, described R9 and Q2 grid connects, the R9 other end is connected with VCC, described ZD1 positive pole connecting triode Q2 grid, negative pole is connected to ground, and described Q1 collector electrode is connected with Q2 grid, emitter is connected to ground, base stage is connected with pwm signal.
5., according to the arbitrary described adjusting control circuit being provided with fan and turn-off function of claim 1-4, it is characterized in that, described speed regulation circuit for fan comprises step-down chip U3A, electric capacity C60, C22, resistance R10, R11, R12, R13, diode D20, inductance L 8A; Described C60 and R13 is in parallel, described R10 and R11 series connection, the FB that one end connects U3A feeds back pin, the other end is connected with reverse pwm signal, and described D20 positive pole connects U3A three-prong, and negative pole connects U3A second pin, described L8A one end connects U3A second pin, the other end connects R13, C60, C22 positive pole respectively, and described R12 one end connects D20 positive pole, C22 negative pole respectively, and the other end connects R10, R13, C60 respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510979058.XA CN105407614B (en) | 2015-12-23 | 2015-12-23 | A kind of adjusting control circuit provided with fan and turn-off function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510979058.XA CN105407614B (en) | 2015-12-23 | 2015-12-23 | A kind of adjusting control circuit provided with fan and turn-off function |
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| CN105407614A true CN105407614A (en) | 2016-03-16 |
| CN105407614B CN105407614B (en) | 2017-12-29 |
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| CN201510979058.XA Active CN105407614B (en) | 2015-12-23 | 2015-12-23 | A kind of adjusting control circuit provided with fan and turn-off function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107682969A (en) * | 2017-10-27 | 2018-02-09 | 深圳市银河风云网络系统股份有限公司 | A kind of light-dimming method and system |
| CN110721388A (en) * | 2019-10-11 | 2020-01-24 | 深圳市奥尔智慧健康有限公司 | Driving circuit of shaded pole motor sleep aid instrument |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107682969A (en) * | 2017-10-27 | 2018-02-09 | 深圳市银河风云网络系统股份有限公司 | A kind of light-dimming method and system |
| CN110721388A (en) * | 2019-10-11 | 2020-01-24 | 深圳市奥尔智慧健康有限公司 | Driving circuit of shaded pole motor sleep aid instrument |
| CN110721388B (en) * | 2019-10-11 | 2022-03-22 | 深圳市奥尔智慧健康有限公司 | Driving circuit of shaded pole motor sleep aid instrument |
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| Publication number | Publication date |
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| CN105407614B (en) | 2017-12-29 |
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