CN110831280A - Linear constant-current LED driving anti-vibration ring wave circuit - Google Patents
Linear constant-current LED driving anti-vibration ring wave circuit Download PDFInfo
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- CN110831280A CN110831280A CN201911094390.2A CN201911094390A CN110831280A CN 110831280 A CN110831280 A CN 110831280A CN 201911094390 A CN201911094390 A CN 201911094390A CN 110831280 A CN110831280 A CN 110831280A
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Abstract
The invention discloses a linear constant-current LED driving anti-ringing circuit which comprises a resistor VR1, a rectifier bridge DB1, a filter capacitor CX1, a rectifier diode D1 and a resistor VR2, wherein two input ends of an alternating current side of the rectifier bridge DB1 are respectively connected with an L line and an N line, the resistor VR1 is connected to the L line and the N line in parallel, the filter capacitor CX1 is connected between two output ends of a direct current side of the rectifier bridge DB1 in parallel, a negative output end of a direct current side of the rectifier bridge DB1 is grounded with one end of the filter capacitor CX1, a positive output end of a direct current side of the rectifier bridge DB1 and the other end of the filter capacitor CX1 are connected with the positive electrode of the rectifier diode D1 through a node, the negative electrode of the rectifier diode D1 is connected with one end of the resistor VR2 through the node, and the other end of the resistor VR2 is grounded. The invention enhances the reliability of the product and improves the cost performance of the product.
Description
Technical Field
The invention relates to the field of illumination, in particular to a linear constant-current LED driving anti-vibration ring wave circuit.
Background
The LED is taken as a new generation green light source, is a hotspot of research and development in the current illumination field, and as the LED is applied more and more widely, the LED driving modes are more and more, and generally, the LED driving modes are divided into three driving modes of isolation, non-isolation and high-voltage linear constant-current driving. The high-voltage linear constant current driving and non-isolation driving scheme has the characteristic of low cost, in recent years, the high-voltage linear constant current driving is more and is rapidly developed, and great application value is shown. On one hand, the light emitting efficiency of the LED is required to be continuously improved, the price is required to be continuously reduced, and on the other hand, more requirements are provided for the service life of the LED lamp. Because the power supply is similar to the traditional switching power supply principle, the circuit is complex, the number of electronic elements is large, the production process is complex, the production cost is high, and the failure probability is high. To reduce cost, high voltage linear constant current drive applications are being developed.
The high-voltage linear constant-current drive has the advantages that:
1. low cost, high efficiency, high PF value, low THD, easy dimming;
2. high cost performance, photoelectric integration, modularization and long service life;
3. no electromagnetic interference, less parts, simple production and low manufacturing cost.
The disadvantages of high voltage linear constant current drive are:
1. the input voltage range can only be single voltage input, the constant current of full voltage can not be realized, and the high-voltage non-isolated power supply, the high-voltage output and the product electrical isolation must be well done;
2. the stability of the electronic circuit is easily influenced due to poor interference strength of resisting high-voltage (2500v) ringing waves.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a linear constant-current LED driving anti-ringing circuit which can effectively prevent high-voltage (2500v) ringing waves from damaging an electronic circuit and protecting an LED load in the use process of an LED lighting lamp and is suitable for high-voltage linear constant-current LED driving and isolated and non-isolated LED driving.
The technical scheme adopted by the invention is as follows:
the utility model provides a linear constant current LED drive anti-vibration ring wave circuit which characterized in that, includes resistance VR1, rectifier bridge DB1, filter capacitance CX1, rectifier diode D1, resistance VR2, L line, N line are inserted respectively to rectifier bridge DB 1's two input ends in the interchange side, resistance VR1 parallel connection is on L line, N line, parallel connection has filter capacitance CX1 between rectifier bridge DB 1's the two output ends in the direct current side, and rectifier bridge DB 1's the negative pole output of direct current side and filter capacitance CX 1's one end are earthed together, rectifier bridge DB 1's the positive pole output of direct current side and filter capacitance CX 1's the other end is connected with rectifier diode D1's positive pole through the node jointly, rectifier diode D1's negative pole passes through the node and is connected with the one end of resistance VR2, the other end of resistance VR2 is earthed.
Further, the linear constant-current LED driving anti-ringing circuit is characterized in that the resistor VR1 and the resistor VR2 are all voltage dependent resistors with adjustable resistance values.
The invention has the advantages that:
the invention solves the problem that high peak voltage damages electronic components in an electronic circuit due to external condition interference or grounding in the technical field of high-voltage linear constant-current LED driving, enhances the reliability of products and improves the cost performance of the products.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Fig. 2 is a schematic diagram of a circuit applied to high-voltage linear constant-current LED driving according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Examples are given.
As shown in fig. 1, the linear constant-current LED driving ring-wave preventing circuit includes a voltage dependent resistor VR1, a rectifier bridge DB1, a filter capacitor CX1, a rectifier diode D1, and a voltage dependent resistor VR2, wherein two input ends of an ac side of the rectifier bridge DB1 are respectively connected to an L line and an N line, the voltage dependent resistor VR1 is connected in parallel to the L line and the N line, the filter capacitor CX1 is connected in parallel between two output ends of a dc side of the rectifier bridge DB1, a negative output end of a dc side of the rectifier bridge DB1 is connected to one end of the filter capacitor CX1, a positive output end of a dc side of the rectifier bridge DB1 and the other end of the filter capacitor CX1 are connected to an anode of the rectifier diode D1 through a node, a negative electrode of the rectifier diode D1 is connected to one end of the voltage dependent resistor VR2 through the node, and the other end of the voltage dependent resistor VR2 is connected to.
As shown in fig. 2, the circuit of the present invention is used in the high-voltage linear constant-current LED driving, and the driving circuit and the load LED are connected to the circuit of the present invention as shown in fig. 2.
In the invention, a voltage dependent resistor VR1, a rectifier bridge DB1, a filter capacitor CX1, a rectifier diode D1 and a voltage dependent resistor VR2 form a secondary high peak discharge protection circuit, so that a product is protected twice; a piezoresistor VR1 is connected in parallel with the front L/N line of the rectifier bridge DB1, and high peak voltage generated outside is discharged at high voltage through a piezoresistor VR1 line to protect a rear-stage circuit; wherein, the voltage dependent resistor VR1 and the rectifier bridge DB1 form a first-level high peak discharge rectification protection circuit; the filter capacitor CX1, the rectifier diode D1 and the voltage dependent resistor VR2 form a secondary peak value absorption rectification bleeder rectification protection circuit for protecting a post-stage circuit and a load LED.
The invention is suitable for isolated and non-isolated driving circuits and line-pressing constant-current LED driving, and the mode shown in FIG. 2 is only a typical application mode.
According to the invention, the rear part of the rectifier diode D1 is connected with the voltage dependent resistor VR2 in an earthed manner, so that the problem of damage to a product caused by external interference in the technical field of high-voltage linear constant-current LED driving is solved in a manner of lowest cost.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (2)
1. A linear constant-current LED driving anti-ringing circuit is characterized by comprising a resistor (VR1), a rectifier bridge (DB1), a filter capacitor (CX1), a rectifier diode (D1) and a resistor (VR2), two input ends of the alternating current side of the rectifier bridge (DB1) are respectively connected to an L line and an N line, the resistor (VR1) is connected to the L line and the N line in parallel, a filter capacitor (CX1) is connected in parallel between two output ends of the direct current side of the rectifier bridge (DB1), and the DC side negative output end of the rectifier bridge (DB1) is connected with one end of the filter capacitor (CX1) in common, the direct current side positive electrode output end of the rectifier bridge (DB1) and the other end of the filter capacitor (CX1) are connected with the positive electrode of the rectifier diode (D1) through a node, the negative electrode of the rectifying diode (D1) is connected with one end of a resistor (VR2) through a node, and the other end of the resistor (VR2) is grounded.
2. The linear constant-current LED driving anti-ringing circuit as claimed in claim 1, wherein the resistor (VR1) and the resistor (VR2) are all voltage dependent resistors with adjustable resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911094390.2A CN110831280A (en) | 2019-11-11 | 2019-11-11 | Linear constant-current LED driving anti-vibration ring wave circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911094390.2A CN110831280A (en) | 2019-11-11 | 2019-11-11 | Linear constant-current LED driving anti-vibration ring wave circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110831280A true CN110831280A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911094390.2A Pending CN110831280A (en) | 2019-11-11 | 2019-11-11 | Linear constant-current LED driving anti-vibration ring wave circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227593A1 (en) * | 2020-05-15 | 2021-11-18 | 佛山市威得士灯饰电器有限公司 | Linear silicon-controlled dimming driving apparatus for led lamp |
-
2019
- 2019-11-11 CN CN201911094390.2A patent/CN110831280A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227593A1 (en) * | 2020-05-15 | 2021-11-18 | 佛山市威得士灯饰电器有限公司 | Linear silicon-controlled dimming driving apparatus for led lamp |
| EP4152894A4 (en) * | 2020-05-15 | 2024-05-22 | Vertex Lighting And Electrical Co Ltd | Linear silicon-controlled dimming driving apparatus for led lamp |
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