CN211509380U - Silicon controlled rectifier dimming color-changing circuit - Google Patents
Silicon controlled rectifier dimming color-changing circuit Download PDFInfo
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- CN211509380U CN211509380U CN201922146321.3U CN201922146321U CN211509380U CN 211509380 U CN211509380 U CN 211509380U CN 201922146321 U CN201922146321 U CN 201922146321U CN 211509380 U CN211509380 U CN 211509380U
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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
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- 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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Abstract
The utility model discloses a silicon controlled rectifier dimming color-changing circuit, relates to the electron field, including the input rectification filter circuit, passive bleeder circuit, transformer magnetism converting circuit and the rectification filter circuit's of output rectification filter circuit, drive control IC, switch detection circuit, back level IC supply circuit, colour temperature control IC and the colour temperature control circuit that connect gradually, drive control IC with rectification filter circuit is connected, and back level IC supply circuit and colour temperature control circuit are connected respectively to output rectification filter circuit's output, back level IC supply circuit and colour temperature control IC, and colour temperature control IC connects colour temperature control circuit; the electromagnetic conversion circuit is connected with the switch detection circuit, and the switch detection circuit is connected with the color temperature control IC, so that the flicker can be avoided, and the stability of the power supply can be improved.
Description
Technical Field
The utility model relates to an electron field especially relates to a silicon controlled rectifier circuit that discolours of adjusting luminance.
Background
The light source, LED, has the features of high light efficiency, long service life and no pollution. With the advancement of national promulgated regulations that prohibit the production and use of incandescent lamps, the market penetration of LED lighting is increasing. With the progress of technology, LED lighting products gradually become intelligent, conditions are provided for the realization of secondary energy conservation of lamps, and LED lamps with dimming functions are more and more widely applied. The market LED lamps and lanterns adjust luminance the mode and have three kinds, do respectively: analog dimming, PWM dimming and silicon controlled dimming. The silicon controlled rectifier dimming circuit is simple and easy to operate, replaces a lamp for dimming the LED, and does not need to change the original dimming circuit, so that the dimming mode is generally good. After a traditional LED silicon controlled rectifier dimming circuit on the market is connected with a silicon controlled rectifier dimmer, when the silicon controlled rectifier is switched on, the voltage of AC commercial power (power frequency alternating current) is almost instantaneously applied to an LC input filter of an LED lamp power supply. A voltage step applied to the inductor may cause oscillation. If the dimmer current is below the thyristor holding current during oscillation, the thyristor will stop conducting. The thyristor trigger circuit is charged and then the thyristor is turned on again. The irregular multiple restarting of the controllable silicon can cause the LED drive to generate audio noise or LED flicker. To avoid the problem of audible noise or LED flicker caused by false triggering or premature turn-off of the thyristors, the input EMI filter inductance and capacitance must be as small as possible, which helps to reduce such unwanted oscillations. When the dimming is performed deeply, in order to maintain the conduction maintaining current of the thyristor, the resistor is connected to the loop, and when the thyristor is adjusted to the maximum dimming position, the loss of the resistor is maximum, so that the power supply efficiency of the framework is low, and particularly when the dimming of high-power LED lighting equipment is applied, the heating value of the resistor is larger, so that the reliability of the LED power supply is greatly reduced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a silicon controlled rectifier dimming color-changing circuit can realize avoiding twinkling the stability that improves the power.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
a thyristor dimmable color change circuit comprising: an input rectifying and filtering circuit, a passive bleeder circuit, a transformer magnetic conversion circuit and a rectifying and filtering main circuit of an output rectifying and filtering circuit, a drive control IC, a switch detection circuit, a post-stage IC power supply circuit, a color temperature control IC and a color temperature control circuit which are connected in sequence, wherein,
the drive control IC is connected with the rectification filtering main circuit and is used for controlling the current of the rectification filtering main circuit;
the output end of the output rectifying and filtering circuit is respectively connected with the rear-stage IC power supply circuit and the color temperature control circuit, the rear-stage IC power supply circuit is connected with the color temperature control IC, and the color temperature control IC is connected with the color temperature control circuit;
the transformer magnetic conversion circuit is connected with the switch detection circuit, and the switch detection circuit is connected with the color temperature control IC.
In one embodiment, the system further comprises an input voltage sampling circuit, a starting circuit, a power switch tube, an IC power supply circuit, a current sampling circuit and a voltage sampling circuit, wherein,
the input end of the input voltage sampling circuit is connected with the input rectifying and filtering circuit, and the output end of the input voltage sampling circuit is connected with the drive control IC;
the output end of the passive bleeder circuit is connected with the drive control IC through the starting circuit;
the output ends of the IC power supply circuit, the voltage sampling circuit and the current sampling circuit are all connected with the drive control IC, and the input ends of the IC power supply circuit, the voltage sampling circuit and the current sampling circuit are all connected with the output end of the transformer magnetic conversion circuit;
the drive control IC is connected to the power switch tube, and the output end of the power switch tube is respectively connected to the transformer magnetic conversion circuit and the current sampling circuit.
In one embodiment, the input rectifying and filtering circuit comprises an input EMI filtering circuit and a rectifying bridge connected to an output terminal of the EMI rectifying and filtering circuit.
In one embodiment, the color temperature control circuit comprises at least two color temperature control branches for connecting a load.
In one embodiment, the color temperature control branch includes a power switch tube, a first color temperature resistor and a second color temperature resistor, one end of the first color temperature resistor is connected to the color temperature control IC, the other end of the first color temperature resistor is connected to the power switch tube, one end of the second color temperature resistor is grounded, the other end of the second color temperature resistor is connected to the input end of the power switch tube, and the output end of the power switch tube is used for connecting a load.
In one embodiment, the post-stage IC power supply circuit includes a capacitor and two resistors connected in parallel to the capacitor, one end of the capacitor is connected to the output rectifying and filtering circuit, and the other end of the capacitor is connected to the color temperature control IC.
In one embodiment, the input voltage sampling circuit includes a first resistance line and a second resistance line connected in parallel, one end of the first resistance line is connected to the driving control IC, the other end of the first resistance line is connected to one end of a rectifier bridge, and one end of the second resistance line is connected to the driving control IC, and the other end of the second resistance line is connected to the other end of the rectifier bridge.
In one embodiment, the passive bleeder circuit includes a first resistor, a first capacitor, a second capacitor, a third capacitor, and a resistor-inductor parallel line, two ends of the resistor-inductor parallel line are respectively connected to one ends of the first and second capacitors, the other ends of the first and second capacitors are grounded, the first resistor is connected to one end of the third capacitor, and the other end of the third capacitor is connected to ground.
In one embodiment, the parallel connection of the resistors and the inductors comprises a second resistor and an inductor, and the second resistor and the inductor are connected in parallel.
An LED lamp comprises the silicon controlled dimming switch color-changing circuit.
The utility model has the advantages that:
firstly, the problem of audio noise or LED flicker generated by LED driving of a color temperature circuit is solved by arranging a passive bleeder circuit to bleed current and voltage.
And secondly, a voltage sampling circuit, a starting circuit, a power switch tube, an IC power supply circuit, a current sampling circuit and a voltage sampling circuit are arranged and connected to a drive control IC, and the drive control IC controls a rectification filtering main circuit to realize maximum current output by comparing related current and voltage.
Drawings
FIG. 1 is a schematic structural view of a silicon controlled light-adjusting color-changing circuit according to the present invention;
fig. 2 is a schematic diagram of a specific circuit structure of the scr dimming/color-changing circuit shown in fig. 1.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
As shown in fig. 1-2, a scr dimming color-changing circuit includes: an input rectifying and filtering circuit, a passive bleeder circuit, a transformer magnetic conversion circuit and a rectifying and filtering main circuit of an output rectifying and filtering circuit, a drive control IC, a switch detection circuit, a post-stage IC power supply circuit, a color temperature control IC and a color temperature control circuit which are connected in sequence, wherein,
the drive control IC is connected with the rectification filtering main circuit and is used for controlling the current of the rectification filtering main circuit;
the output end of the output rectifying filter circuit is respectively connected with the rear-stage IC power supply circuit and the color temperature control circuit, the rear-stage IC power supply circuit is connected with the color temperature control IC, and the color temperature control IC is connected with the color temperature control circuit;
the transformer magnetic conversion circuit is connected with the switch detection circuit, and the switch detection circuit is connected with the color temperature control IC.
In this embodiment, the working process of the main line is as follows: the input end of the input rectifying filter circuit is respectively connected with a zero line and a live wire, current passes through the passive bleeder circuit after being rectified and filtered, under the condition that the color temperature control voltage is low, the passive bleeder circuit can discharge redundant voltage and current, the flickering phenomenon of an LED is avoided, the voltage can be more stable through the transformer magnetic conversion circuit and the output rectifying filter circuit, the output rectifying circuit supplies power for a stable IC of the color temperature control IC through a rear-stage IC power supply circuit, further, the transformer magnetic conversion circuit is also connected with the switch detection circuit, the switch detection circuit performs transmission of electric signals through the switching of the detection circuit, and the color temperature control IC receives the electric signals to realize the switching of the color temperature control circuit.
In the present embodiment, the color temperature control IC is an integrated chip of model HT68F 002X.
In the embodiment, the circuit also comprises an input voltage sampling circuit, a starting circuit, a power switch tube, an IC power supply circuit, a current sampling circuit and a voltage sampling circuit, wherein,
the input end of the input voltage sampling circuit is connected with the input rectifying filter circuit, and the output end of the input voltage sampling circuit is connected with the drive control IC;
the output end of the passive bleeder circuit is connected with the drive control IC through the starting circuit;
the output ends of the IC power supply circuit, the voltage sampling circuit and the current sampling circuit are all connected with the drive control IC, and the input ends of the IC power supply circuit, the voltage sampling circuit and the current sampling circuit are all connected with the output end of the transformer magnetic conversion circuit;
the drive control IC is connected to the power switch tube, and the output end of the power switch tube is respectively connected to the transformer magnetic conversion circuit and the current sampling circuit.
In the present embodiment, the color temperature control IC is an integrated chip of model IW 3689X.
In this embodiment, the input rectifying and filtering circuit includes an input EMI filtering circuit and a rectifying bridge connected to an output terminal of the EMI rectifying and filtering circuit.
In this embodiment, the switch detection circuit includes a diode D3, an input terminal of the diode D3 is connected to an input terminal of the output rectifying filter circuit and a secondary coil pin 5 of the transformer magnetic conversion circuit, an output terminal of the diode D3 is connected to one end of a capacitor C17, the capacitor C17 is connected in parallel with a line in which the first detection line resistor R28 and the second detection line resistor R16 are connected in series, the other end of the capacitor C17 is connected to a VSS pin of the color temperature control IC, the other end of the capacitor C17 is further connected to ground, and a pin PA0 of the color temperature control IC is connected between the first detection line resistor R28 and the second detection line resistor R16.
In this embodiment, the color temperature control circuit includes at least two color temperature control branches for connecting the load, so that the color temperature control IC controls the on/off of the color temperature control circuit according to the signal of the switch detection circuit.
In this embodiment, the color temperature control branch includes a power switch Q2, a first color temperature resistor R36 and a second color temperature resistor R34, one end of the first color temperature resistor R36 is connected to the color temperature control IC, the other end thereof is connected to the power switch Q2, one end of the second color temperature resistor R36 is grounded, the other end thereof is connected to the input end of the power switch Q2, and the output end of the power switch Q2 is used for connecting a load.
In this embodiment, the input voltage sampling circuit includes a first resistance line and a second resistance line connected in parallel, one end of the first resistance line is connected to the driving control IC, the other end of the first resistance line is connected to one end of the rectifier bridge, one end of the second resistance line is connected to the driving control IC, and the other end of the second resistance line is connected to the other end of the rectifier bridge.
In this embodiment, the passive bleeder circuit includes a first resistor R7, a first capacitor C4, a second capacitor C5, a third capacitor, and a resistor-inductor parallel line, two ends of the resistor-inductor parallel line are respectively connected to one ends of the first and second capacitors, the other ends of the first and second capacitors are grounded, the first resistor R7 is connected to one end of the third capacitor C6, and the other end of the third capacitor C6 is connected to ground.
In this embodiment, the resistor-inductor parallel line includes a second resistor R6 and an inductor L3, and the second resistor R6 and the inductor L3 are connected in parallel.
An LED lamp comprises the silicon controlled dimming switch color-changing circuit.
The technical solutions provided by the embodiments of the present application are introduced in detail, and specific examples are applied in the description to explain the principles and embodiments of the present application, and the descriptions of the embodiments are only used to help understanding the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, the specific embodiments and the application range may be changed. In summary, the description is specific and detailed, but not to be construed as limiting the scope of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (9)
1. A thyristor dimming color change circuit, comprising: an input rectifying and filtering circuit, a passive bleeder circuit, a transformer magnetic conversion circuit and a rectifying and filtering main circuit of an output rectifying and filtering circuit, a drive control IC, a switch detection circuit, a post-stage IC power supply circuit, a color temperature control IC and a color temperature control circuit which are connected in sequence, wherein,
the drive control IC is connected with the rectification filtering main circuit and is used for controlling the current of the rectification filtering main circuit;
the output end of the output rectifying and filtering circuit is respectively connected with the rear-stage IC power supply circuit and the color temperature control circuit, the rear-stage IC power supply circuit is connected with the color temperature control IC, and the color temperature control IC is connected with the color temperature control circuit;
the transformer magnetic conversion circuit is connected with the switch detection circuit, and the switch detection circuit is connected with the color temperature control IC.
2. The SCR photochromic circuit of claim 1, further comprising an input voltage sampling circuit, a start-up circuit, a power switch, an IC power supply circuit, a current sampling circuit, and a voltage sampling circuit, wherein,
the input end of the input voltage sampling circuit is connected with the input rectifying and filtering circuit, and the output end of the input voltage sampling circuit is connected with the drive control IC;
the output end of the passive bleeder circuit is connected with the drive control IC through the starting circuit;
the output ends of the IC power supply circuit, the voltage sampling circuit and the current sampling circuit are all connected with the drive control IC, and the input ends of the IC power supply circuit, the voltage sampling circuit and the current sampling circuit are all connected with the output end of the transformer magnetic conversion circuit;
the drive control IC is connected to the power switch tube, and the output end of the power switch tube is respectively connected to the transformer magnetic conversion circuit and the current sampling circuit.
3. The scr dimming circuit of claim 1, wherein the input rectifying filter circuit comprises an input EMI filter circuit and a rectifying bridge coupled to an output of the input EMI filter circuit.
4. The SCR dimmable color changing circuit of claim 1, wherein said color temperature control circuit comprises at least two color temperature control branches for connecting a load.
5. The SCR dimming color-changing circuit of claim 4, wherein the color temperature control branch comprises a power switch tube, a first color temperature resistor and a second color temperature resistor, one end of the first color temperature resistor is connected to the color temperature control IC, the other end of the first color temperature resistor is connected to the power switch tube, one end of the second color temperature resistor is grounded, the other end of the second color temperature resistor is connected to the input end of the power switch tube, and the output end of the power switch tube is connected to a load.
6. The SCR dimming color-changing circuit according to any one of claims 1-5, wherein the post-stage IC power supply circuit comprises a capacitor and two resistors connected in parallel to the capacitor, one end of the capacitor is connected to the output rectifying and filtering circuit, and the other end of the capacitor is connected to the color temperature control IC.
7. The scr dimming circuit of claim 2, wherein the input voltage sampling circuit comprises a first resistance line and a second resistance line connected in parallel, wherein one end of the first resistance line is connected to the driving control IC, and the other end thereof is connected to one end of a rectifier bridge, and one end of the second resistance line is connected to the driving control IC, and the other end thereof is connected to the other end of the rectifier bridge.
8. The SCR dimming color circuit of any one of claims 1-5, wherein the passive bleeding circuit comprises a first resistor, a first capacitor, a second capacitor, a third capacitor and a resistor-inductor parallel line, two ends of the resistor-inductor parallel line are respectively connected to one ends of the first and second capacitors, the other ends of the first and second capacitors are grounded, the first resistor is connected to one end of the third capacitor, and the other end of the third capacitor is connected to ground.
9. The scr dimming circuit of claim 8, wherein the resistor-inductor parallel line comprises a second resistor and an inductor, the second resistor and the inductor being connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922146321.3U CN211509380U (en) | 2019-12-04 | 2019-12-04 | Silicon controlled rectifier dimming color-changing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922146321.3U CN211509380U (en) | 2019-12-04 | 2019-12-04 | Silicon controlled rectifier dimming color-changing circuit |
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| Publication Number | Publication Date |
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| CN211509380U true CN211509380U (en) | 2020-09-15 |
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| CN201922146321.3U Active CN211509380U (en) | 2019-12-04 | 2019-12-04 | Silicon controlled rectifier dimming color-changing circuit |
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