CN211880670U - 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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- CN211880670U CN211880670U CN201921933500.5U CN201921933500U CN211880670U CN 211880670 U CN211880670 U CN 211880670U CN 201921933500 U CN201921933500 U CN 201921933500U CN 211880670 U CN211880670 U CN 211880670U
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Abstract
The utility model discloses a linear constant current LED drive anti-vibration ringing circuit, including 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 inputs 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 outputs in direct current side, just rectifier bridge DB 1's direct current side negative pole output is earthed with filter capacitance CX 1's one end altogether, rectifier bridge DB 1's the positive output in direct current side and filter capacitance CX 1's the other end pass through the node jointly with rectifier diode D1's anodal connection, rectifier diode D1's negative pole passes through the node and is connected with resistance VR 2's one end, resistance VR 2's other end ground connection. The utility model discloses strengthen the reliability of product, improved the price/performance ratio of product.
Description
Technical Field
The utility model relates to the field of lighting, especially, relate to a linear constant current LED drive 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.
SUMMERY OF THE UTILITY MODEL
Based on the technical problem that the background art exists, the utility model provides a linear constant current LED drive anti-vibration ring wave circuit can prevent effectively in LED illumination lamps and lanterns use that high pressure (2500v) ringing wave from damaging electronic circuit, protection LED load, is applicable to in the linear constant current LED drive of high pressure and keeps apart and the non-isolation LED drive.
The utility model adopts the technical proposal that:
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 utility model has the advantages that:
the utility model provides a high peak voltage that causes because of external condition interference, or ground connection among the high-voltage linear constant current LED drive technical field to electronic circuit in the damage of electronic components, strengthened the reliability of product, improved the price/performance ratio of product.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Fig. 2 is the utility model discloses be applied to the circuit schematic diagram in the linear constant current LED drive of high pressure.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all 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, will the utility model discloses a circuit is arranged in the drive of the linear constant current LED of high pressure, and drive circuit, load LED insert as fig. 2 in the utility model discloses an in the circuit.
In the utility model, the voltage dependent resistor VR1, the rectifier bridge DB1, the filter capacitor CX1, the rectifier diode D1 and the voltage dependent resistor VR2 form a secondary high peak discharge protection circuit, and the 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 utility model is suitable for an keep apart and non-keep apart drive circuit and line ball nature constant current LED drive, it is only a typical application mode that fig. 2 shows.
The utility model discloses meet a piezo-resistor VR2 to ground behind rectifier diode D1 to the damage that causes the product because of external disturbance in the linear constant current LED drive technical field of high pressure has been solved to the mode of low cost.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection 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 |
|---|---|---|---|
| CN201921933500.5U CN211880670U (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 |
|---|---|---|---|
| CN201921933500.5U CN211880670U (en) | 2019-11-11 | 2019-11-11 | Linear constant-current LED driving anti-vibration ring wave circuit |
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| CN211880670U true CN211880670U (en) | 2020-11-06 |
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| CN201921933500.5U Active CN211880670U (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 |
|---|---|---|---|---|
| CN110831280A (en) * | 2019-11-11 | 2020-02-21 | 吉安伊戈尔电气有限公司 | Linear constant-current LED driving anti-vibration ring wave circuit |
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2019
- 2019-11-11 CN CN201921933500.5U patent/CN211880670U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110831280A (en) * | 2019-11-11 | 2020-02-21 | 吉安伊戈尔电气有限公司 | Linear constant-current LED driving anti-vibration ring wave circuit |
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