CN219761379U - Alternating current dimming circuit for LED power supply - Google Patents
Alternating current dimming circuit for LED power supply Download PDFInfo
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- CN219761379U CN219761379U CN202321167621.XU CN202321167621U CN219761379U CN 219761379 U CN219761379 U CN 219761379U CN 202321167621 U CN202321167621 U CN 202321167621U CN 219761379 U CN219761379 U CN 219761379U
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- 238000005286 illumination Methods 0.000 description 2
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Abstract
The utility model discloses an alternating current dimming circuit for an LED power supply, which comprises a power supply management circuit, an MOS tube Q1, a resistor R4, a control circuit, a singlechip circuit and a PUSH switch, wherein the input end of the power supply management circuit is connected with a live wire L and a zero wire N, the power supply management circuit outputs an LED+ end, an LED-end and a GNS end, a lamp is connected between the LED+ end and the LED-end, the source electrode of the MOS tube Q1 is connected with the GNS end, the drain electrode of the MOS tube Q1 is connected with the LED-end, the grid electrode of the MOS tube Q1 is connected with the output end of the singlechip circuit through the resistor R4, and the input end of the control circuit is connected with the live wire L or the zero wire N through the PUSH switch and the output end is connected with the detection end of the singlechip circuit; through the structure, the detection end of the singlechip circuit is pulled up to a high level, and the detection end of the singlechip circuit is pulled down to a low level when the PUSH switch is closed, and the detection end of the singlechip circuit outputs a corresponding PWM duty ratio to conduct the MOS tube Q1 when detecting the low level so as to drive the lamp, thereby realizing dimming of the lamp.
Description
Technical Field
The utility model relates to the field of LED power supplies, in particular to an alternating current dimming circuit for an LED power supply.
Background
With the rapid development of the LED illumination industry, the LED lamps are used for all households and outdoor illumination, so that the LED power supply market is vigorously developed; at present, more dimming power supplies such as thyristors and 0-10V, DALI, DMX are used in the market, other control modes are controlled by re-signal lines except for the thyristors, and although the thyristors can utilize alternating current input of mains supply to control dimming, the thyristors chop alternating current and generate high spike pulses, so that an alternating current dimming circuit for an LED power supply is needed to solve the problems.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an ac dimming circuit for an LED power supply.
The technical scheme adopted by the embodiment of the utility model for solving the technical problems is as follows: the utility model provides an alternating current dimming circuit for LED power, includes power management circuit, MOS pipe Q1, resistance R4, control circuit, singlechip circuit and PUSH switch, power management circuit's input is connected with live wire L and zero line N, power management circuit output LED+ end, LED-end and GNS end, lamps and lanterns access between LED+ end and the LED-end, MOS pipe Q1's source is connected with the GNS end, MOS pipe Q1's drain electrode is connected with the LED-end, MOS pipe Q1's grid is connected with singlechip circuit's output through resistance R4, control circuit's input is connected with live wire L or zero line N through PUSH switch, output with singlechip circuit's detection end is connected.
Further, the control circuit comprises a diode D1, a resistor R3-4, a triode Q2 and an optical coupler U2, the power management circuit outputs a VDD end, a VCC end and a GND end, the detection end of the single chip microcomputer circuit is connected with one end of an optical coupler U2 light receiver, the other end of the optical coupler U2 light receiver is connected with the GNS end, one end of the optical coupler U2 light emitter is connected with the VCC end through a resistor R3, the other end of the optical coupler U2 light emitter is connected with a collector of the triode Q2, an emitter of the triode Q2 is connected with the GND end, a base of the triode Q2 is connected with a cathode of the diode D1, and an anode of the diode D1 is connected with the PUSH switch.
Further, the alternating current dimming circuit for the LED power supply further comprises a resistor R1 and a capacitor C2, one end of the resistor R1 is connected with the VDD end, the other end of the resistor R1 is respectively connected with one end of the optocoupler U2 light receiver, the detection end of the singlechip circuit and one end of the capacitor C2, and the other end of the capacitor C2 is connected with the GNS end.
Further, the alternating current dimming circuit for the LED power supply further comprises a resistor R2 and a resistor R5, one end of the resistor R2 is connected with the cathode of the diode D1, the other end of the resistor R2 is respectively connected with the base electrode of the triode Q2 and one end of the resistor R5, and the other end of the resistor R5 is connected with the GND end.
Further, the alternating current dimming circuit for the LED power supply further comprises a capacitor C1, one end of the capacitor C1 is connected with the cathode of the diode D1 and the base of the triode Q2 respectively, and the other end of the capacitor C1 is connected with the GND end.
The utility model has the beneficial effects that: the alternating current dimming circuit for the LED power supply comprises a power supply management circuit, an MOS tube Q1, a resistor R4, a control circuit, a single chip microcomputer circuit and a PUSH switch, wherein the input end of the power supply management circuit is connected with a live wire L and a zero line N, the power supply management circuit outputs an LED+ end, an LED-end and a GNS end, a lamp is connected between the LED+ end and the LED-end, the source electrode of the MOS tube Q1 is connected with the GNS end, the drain electrode of the MOS tube Q1 is connected with the LED-end, the grid electrode of the MOS tube Q1 is connected with the output end of the single chip microcomputer circuit through the resistor R4, and the input end of the control circuit is connected with the live wire L or the zero line N through the PUSH switch and the output end is connected with the detection end of the single chip microcomputer circuit; through the structure, the detection end of the singlechip circuit is pulled up to a high level, and the detection end of the singlechip circuit is pulled down to a low level when the PUSH switch is closed, and the detection end of the singlechip circuit outputs a corresponding PWM duty ratio to conduct the MOS tube Q1 when detecting the low level so as to drive the lamp, thereby realizing dimming of the lamp.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic block diagram of an AC dimmer circuit for an LED power supply;
fig. 2 is a schematic circuit diagram of an ac dimmer circuit for an LED power supply.
Detailed Description
Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.
In the description of the present utility model, plural means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and the above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the present utility model, unless clearly defined otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly and may be connected directly or indirectly through an intermediary; the connecting device can be fixedly connected, detachably connected and integrally formed; may be a mechanical connection; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the utility model can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.
Referring to fig. 1-2, an alternating current dimming circuit for an LED power supply comprises a power management circuit, a MOS tube Q1, a resistor R4, a control circuit, a single chip microcomputer circuit and a PUSH switch, wherein the input end of the power management circuit is connected with a live wire L and a null wire N, the power management circuit outputs an led+ end, an LED-end and a GNS end, a lamp is connected between the led+ end and the LED-end, the source electrode of the MOS tube Q1 is connected with the GNS end, the drain electrode of the MOS tube Q1 is connected with the LED-end, the gate electrode of the MOS tube Q1 is connected with the output end of the single chip microcomputer circuit through the resistor R4, and the input end of the control circuit is connected with the live wire L or the null wire N through the PUSH switch, and the output end is connected with the detection end of the single chip microcomputer circuit.
The control circuit comprises a diode D1, a resistor R3-4, a triode Q2 and an optocoupler U2, wherein the power management circuit outputs a VDD end, a VCC end and a GND end, a detection end of the single chip microcomputer circuit is connected with one end of an optocoupler U2 light receiver, the other end of the optocoupler U2 light receiver is connected with the GNS end, one end of the optocoupler U2 light emitter is connected with the VCC end through a resistor R3, the other end of the optocoupler U2 light emitter is connected with a collector of the triode Q2, an emitter of the triode Q2 is connected with the GND end, a base of the triode Q2 is connected with a cathode of the diode D1, and an anode of the diode D1 is connected with the PUSH switch.
The alternating current dimming circuit for the LED power supply further comprises a resistor R1 and a capacitor C2, one end of the resistor R1 is connected with the VDD end, the other end of the resistor R1 is respectively connected with one end of an optocoupler U2 light receiver, the detection end of the singlechip circuit and one end of the capacitor C2, and the other end of the capacitor C2 is connected with the GNS end.
The alternating current dimming circuit for the LED power supply further comprises a resistor R2 and a resistor R5, one end of the resistor R2 is connected with the cathode of the diode D1, the other end of the resistor R2 is respectively connected with the base electrode of the triode Q2 and one end of the resistor R5, and the other end of the resistor R5 is connected with the GND end.
The alternating current dimming circuit for the LED power supply further comprises a capacitor C1, one end of the capacitor C1 is connected with the cathode of the diode D1 and the base of the triode Q2 respectively, and the other end of the capacitor C1 is connected with the GND end.
The working principle of the utility model is as follows: when the system is electrified, a live wire L and a zero wire N of a commercial power are respectively connected to a power management circuit through a terminal 1 and a terminal 2, and after being processed by the power management circuit, an LED+ end, an LED-end, a VDD end, a VCC end, a GND end and a GNS end are respectively output, wherein a lamp is connected between the LED+ end and the LED-end, the VDD end is connected to a 3 rd pin of a singlechip U1 after being filtered by a resistor R1 and a capacitor C2, and the 3 rd pin of the singlechip U1 is pulled up to a high level; the PUSH switch can be connected with a live wire L or a zero line N, when the PUSH switch is closed, the live wire L or the zero line N is connected to a terminal 3 through the PUSH switch, a PUSH switch signal on the terminal 3 is conducted with a triode Q2 after passing through a diode D1 and through the voltage division of a resistor R2 and a resistor R5 and the filtering of a capacitor C1, the triode Q2 pulls the 2 nd pin of the optocoupler U2 to GND, the optocoupler U2 is conducted, the 3 rd pin of the singlechip U1 is pulled down to GNS after the optocoupler U2 is conducted, when the 3 rd pin of the singlechip U1 detects a low level, a corresponding PWM duty ratio is output through the 1 st pin of the singlechip U1, the MOS tube Q1 is conducted after passing through the resistor R4, and the MOS tube Q1 drives a lamp, so that the dimming of the lamp is realized.
Of course, the present utility model is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications and substitutions without departing from the spirit of the present utility model, and these equivalent modifications and substitutions are included in the scope of the present utility model as defined in the appended claims.
Claims (5)
1. An ac dimming circuit for an LED power supply, characterized by: the LED lamp comprises a power management circuit, an MOS tube Q1, a resistor R4, a control circuit, a single chip microcomputer circuit and a PUSH switch, wherein the input end of the power management circuit is connected with a live wire L and a null wire N, the power management circuit outputs an LED+ end, an LED-end and a GNS end, a lamp is connected between the LED+ end and the LED-end, a source electrode of the MOS tube Q1 is connected with the GNS end, a drain electrode of the MOS tube Q1 is connected with the LED-end, a grid electrode of the MOS tube Q1 is connected with the output end of the single chip microcomputer circuit through the resistor R4, and the input end of the control circuit is connected with the live wire L or the null wire N through the PUSH switch and the output end is connected with the detection end of the single chip microcomputer circuit.
2. An ac dimming circuit for an LED power supply as claimed in claim 1, wherein: the control circuit comprises a diode D1, a resistor R3-4, a triode Q2 and an optocoupler U2, wherein the power management circuit outputs a VDD end, a VCC end and a GND end, the detection end of the single chip microcomputer circuit is connected with one end of an optocoupler U2 light receiver, the other end of the optocoupler U2 light receiver is connected with the GNS end, one end of the optocoupler U2 light emitter is connected with the VCC end through a resistor R3, the other end of the optocoupler U2 light emitter is connected with a collector of the triode Q2, an emitter of the triode Q2 is connected with the GND end, a base of the triode Q2 is connected with a cathode of the diode D1, and an anode of the diode D1 is connected with the PUSH switch.
3. An ac dimming circuit for an LED power supply as claimed in claim 2, wherein: the LED light source further comprises a resistor R1 and a capacitor C2, wherein one end of the resistor R1 is connected with the VDD end, the other end of the resistor R1 is respectively connected with one end of an optical coupler U2 light receiver, the detection end of a singlechip circuit and one end of the capacitor C2, and the other end of the capacitor C2 is connected with the GNS end.
4. An ac dimming circuit for an LED power supply as claimed in claim 2, wherein: the resistor R2 and the resistor R5 are further included, one end of the resistor R2 is connected with the cathode of the diode D1, the other end of the resistor R2 is connected with the base electrode of the triode Q2 and one end of the resistor R5 respectively, and the other end of the resistor R5 is connected with the GND end.
5. An ac dimming circuit for an LED power supply as claimed in claim 2, wherein: the LED lamp further comprises a capacitor C1, one end of the capacitor C1 is connected with the cathode of the diode D1 and the base of the triode Q2 respectively, and the other end of the capacitor C1 is connected with the GND end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321167621.XU CN219761379U (en) | 2023-05-15 | 2023-05-15 | Alternating current dimming circuit for LED power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321167621.XU CN219761379U (en) | 2023-05-15 | 2023-05-15 | Alternating current dimming circuit for LED power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219761379U true CN219761379U (en) | 2023-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321167621.XU Active CN219761379U (en) | 2023-05-15 | 2023-05-15 | Alternating current dimming circuit for LED power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219761379U (en) |
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2023
- 2023-05-15 CN CN202321167621.XU patent/CN219761379U/en active Active
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