CN219761378U - LED power supply with quick power failure detection function - Google Patents
LED power supply with quick power failure detection function Download PDFInfo
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- CN219761378U CN219761378U CN202321167590.8U CN202321167590U CN219761378U CN 219761378 U CN219761378 U CN 219761378U CN 202321167590 U CN202321167590 U CN 202321167590U CN 219761378 U CN219761378 U CN 219761378U
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- 238000001514 detection method Methods 0.000 title claims abstract description 43
- 238000001914 filtration Methods 0.000 claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 21
- 238000004804 winding Methods 0.000 claims description 21
- 238000010586 diagram Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000006467 substitution reaction Methods 0.000 description 2
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Abstract
The utility model discloses an LED power supply with a rapid power failure detection function, which comprises a power management circuit, a magnetic device, a rectifying and filtering circuit, a singlechip circuit and a power failure detection circuit, wherein the input end of the power management circuit is connected with a live wire L and a zero wire N, the input end of the magnetic device and the output end of the power management circuit are respectively connected with one end of the power failure detection circuit and the input end of the rectifying and filtering circuit, a load is connected to the output end of the rectifying and filtering circuit, and the other end of the power failure detection circuit is connected with the singlechip circuit; after the LED power supply is electrified, the induced voltage on the output end of the magnetic device is directly detected through the singlechip circuit, and after the mains supply input of the LED power supply is powered down, the power-down signal of the induced voltage on the output end of the magnetic device is detected through the singlechip circuit, so that quick power-down detection is realized.
Description
Technical Field
The utility model relates to the field of LED power supplies, in particular to an LED power supply with a rapid power failure detection function.
Background
With the rapid development of the LED illumination industry, the LED lamps are used for illumination of various households and outdoor, so that the LED power supply market is vigorously developed, and the requirements on the LED power supply are higher and higher; in some places with severe power consumption environments, fluctuation and even power failure can occur in a power grid, so that abnormal power failure occurs to an LED power supply, data loss is caused to a user, most of current LED power supplies are detected by using power failure of a power supply voltage, and the power supply voltage is generally stored by a large electrolytic capacitor, so that the detection speed can be slower, and therefore, an LED power supply with a rapid power failure detection function is urgently 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. Therefore, the utility model provides an LED power supply with a rapid power failure detection function.
The technical scheme adopted by the embodiment of the utility model for solving the technical problems is as follows: the utility model provides a LED power with quick power failure detection function, includes power management circuit, magnetic device, rectification filter circuit, singlechip circuit and power failure detection circuit, power management circuit's input is connected with live wire L and zero line N, magnetic device's input with power management circuit's output respectively with power failure detection circuit's one end and rectification filter circuit's input are connected, and the load inserts rectification filter circuit's output, power failure detection circuit's the other end with the singlechip circuit is connected.
Further, the magnetic device is set as a transformer T1, the output end of the power management circuit is connected with a primary winding N1 of the transformer T1, and a secondary winding N2 of the transformer T1 is connected with the rectifying and filtering circuit and the power failure detection circuit respectively.
Further, the power failure detection circuit comprises a diode D2, a capacitor C1, a resistor R1 and a resistor R2, one end of a secondary winding N2 of the transformer T1 is respectively connected with an anode of the diode D2, a rectifying and filtering circuit and a power pin of the singlechip U1, the other end of the secondary winding N2 of the transformer T1 is connected with a grounding end, a cathode of the diode D2 is respectively connected with one end of the resistor R1 and one end of the capacitor C1, the other end of the resistor R1 is respectively connected with a detection pin of the singlechip U1 and one end of the resistor R2, and the other end of the resistor R2 is respectively connected with the other end of the capacitor C1 and the grounding end.
Further, the rectifying and filtering circuit comprises a diode D1 and an electrolytic capacitor EC1, wherein the anode of the diode D1 is respectively connected with one end of a secondary winding N2 of the transformer T1 and the anode of the diode D2, and the cathode of the diode D1 is respectively connected with one end of a load, a power pin of the singlechip U1 and the anode of the electrolytic capacitor EC1, and the cathode of the electrolytic capacitor EC1 is grounded.
The utility model has the beneficial effects that: the LED power supply with the rapid power failure detection function comprises a power management circuit, a magnetic device, a rectification filter circuit, a singlechip circuit and a power failure detection circuit, wherein the input end of the power management circuit is connected with a live wire L and a zero wire N, the input end of the magnetic device and the output end of the power management circuit are respectively connected with one end of the power failure detection circuit and the input end of the rectification filter circuit, a load is connected to the output end of the rectification filter circuit, and the other end of the power failure detection circuit is connected with the singlechip circuit; after the LED power supply is electrified, the induced voltage on the output end of the magnetic device is directly detected through the singlechip circuit, and after the mains supply input of the LED power supply is powered down, the power-down signal of the induced voltage on the output end of the magnetic device is detected through the singlechip circuit, so that quick power-down detection is realized.
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 functional block diagram of an LED power supply with a fast power down detection function;
fig. 2 is a schematic circuit diagram of an LED power supply with a fast power down detection function.
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 LED power supply with a rapid power failure detection function includes a power management circuit, a magnetic device, a rectifying and filtering circuit, a single chip microcomputer circuit and a power failure detection circuit, wherein an input end of the power management circuit is connected with a live wire L and a zero wire N, an input end of the magnetic device and an output end of the power management circuit are respectively connected with one end of the power failure detection circuit and an input end of the rectifying and filtering circuit, a load is connected to an output end of the rectifying and filtering circuit, and the other end of the power failure detection circuit is connected with the single chip microcomputer circuit.
The magnetic device is set as a transformer T1, the output end of the power management circuit is connected with a primary winding N1 of the transformer T1, and a secondary winding N2 of the transformer T1 is respectively connected with the rectifying and filtering circuit and the power failure detection circuit.
The power failure detection circuit comprises a diode D2, a capacitor C1, a resistor R1 and a resistor R2, wherein one end of a secondary winding N2 of a transformer T1 is respectively connected with an anode of the diode D2, a rectifying and filtering circuit and a power pin of a singlechip U1, the other end of the secondary winding N2 of the transformer T1 is connected with a grounding end, a cathode of the diode D2 is respectively connected with one end of the resistor R1 and one end of the capacitor C1, the other end of the resistor R1 is respectively connected with a detection pin of the singlechip U1 and one end of the resistor R2, and the other end of the resistor R2 is respectively connected with the other end of the capacitor C1 and the grounding end.
The rectifying and filtering circuit comprises a diode D1 and an electrolytic capacitor EC1, wherein the anode of the diode D1 is respectively connected with one end of a secondary winding N2 of the transformer T1 and the anode of the diode D2, and the cathode of the diode D1 is respectively connected with one end of a load, a power supply pin of the singlechip U1 and the anode of the electrolytic capacitor EC1, and the cathode of the electrolytic capacitor EC1 is grounded.
The working principle of the utility model is as follows:
when the system is electrified, a live wire L and a zero wire N which are input by a mains supply are connected to a power management circuit through terminals, a driving voltage is output to a primary winding N1 of a transformer T1 after being processed by the power management circuit, a voltage induced by a secondary winding N2 of the transformer T1 is rectified through a diode D1, a voltage VDD is output after being filtered through a capacitor EC1, meanwhile, the voltage VDD supplies power to a singlechip U1, and a voltage induced by a secondary winding N2 of the transformer T1 is connected to a 3 rd pin of the singlechip U1 for detection after being rectified through a diode D2 and filtered through a capacitor C1 and then divided by a resistor R1 and a resistor R2; when the system is powered off, the voltage of the live wire L and the zero wire N is disconnected, the power management circuit is powered off to output driving voltage, the voltage induced by the secondary winding N2 of the transformer T1 disappears, meanwhile, the voltage on the 3 rd pin of the singlechip U1 starts to be powered off rapidly, and the singlechip U1 can detect the power-off signal; the utility model has the advantages that: after the LED power supply is electrified, the induced voltage on the secondary winding N2 of the transformer T1 is detected through the singlechip U1, and after the mains supply input of the LED power supply is powered down, the induced voltage power-down signal on the secondary winding N2 of the transformer T1 is detected through the singlechip U1, so that quick power-down detection 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 (4)
1. An LED power with quick power down detects function, its characterized in that: the power supply comprises a power supply management circuit, a magnetic device, a rectifying and filtering circuit, a singlechip circuit and a power failure detection circuit, wherein the input end of the power supply management circuit is connected with a live wire L and a zero wire N, the input end of the magnetic device is connected with the output end of the power supply management circuit, one end of the power failure detection circuit and the input end of the rectifying and filtering circuit respectively, a load is connected with the output end of the rectifying and filtering circuit, and the other end of the power failure detection circuit is connected with the singlechip circuit.
2. The LED power supply with rapid power loss detection function according to claim 1, wherein: the magnetic device is set as a transformer T1, the output end of the power management circuit is connected with a primary winding N1 of the transformer T1, and a secondary winding N2 of the transformer T1 is respectively connected with the rectifying and filtering circuit and the power failure detection circuit.
3. The LED power supply with rapid power loss detection function according to claim 2, wherein: the power failure detection circuit comprises a diode D2, a capacitor C1, a resistor R1 and a resistor R2, wherein one end of a secondary winding N2 of a transformer T1 is respectively connected with an anode of the diode D2, a rectifying and filtering circuit and a power pin of a singlechip U1, the other end of the secondary winding N2 of the transformer T1 is connected with a grounding end, a cathode of the diode D2 is respectively connected with one end of the resistor R1 and one end of the capacitor C1, the other end of the resistor R1 is respectively connected with a detection pin of the singlechip U1 and one end of the resistor R2, and the other end of the resistor R2 is respectively connected with the other end of the capacitor C1 and the grounding end.
4. The LED power supply with rapid power loss detection function according to claim 2, wherein: the rectification filter circuit comprises a diode D1 and an electrolytic capacitor EC1, wherein the anode of the diode D1 is respectively connected with one end of a secondary winding N2 of the transformer T1 and the anode of the diode D2, and the cathode of the diode D1 is respectively connected with one end of a load, a power supply pin of the singlechip U1 and the anode of the electrolytic capacitor EC1, and the cathode of the electrolytic capacitor EC1 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321167590.8U CN219761378U (en) | 2023-05-15 | 2023-05-15 | LED power supply with quick power failure detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321167590.8U CN219761378U (en) | 2023-05-15 | 2023-05-15 | LED power supply with quick power failure detection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219761378U true CN219761378U (en) | 2023-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321167590.8U Active CN219761378U (en) | 2023-05-15 | 2023-05-15 | LED power supply with quick power failure detection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219761378U (en) |
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2023
- 2023-05-15 CN CN202321167590.8U patent/CN219761378U/en active Active
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