CN211152277U

CN211152277U - Linear L ED drive circuit and L ED lamp

Info

Publication number: CN211152277U
Application number: CN201922376596.6U
Authority: CN
Inventors: 刘长柱
Original assignee: Xiamen Yankon Energetic Lighting Co Ltd; Zhejiang Yankon Group Co Ltd
Current assignee: Xiamen Yankon Energetic Lighting Co Ltd; Zhejiang Yankon Group Co Ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-07-31
Anticipated expiration: 2029-12-26

Abstract

The utility model relates to an L ED drives technical field, relates to a linear L ED drive circuit and L0 ED lamp especially, the utility model discloses a linear L ED drive circuit and L ED lamp, wherein, linear L ED drive circuit includes diode D1, diode D2, electric capacity C1, electric capacity C2 and L ED light source, electric capacity C1 and electric capacity C2 are electrolytic capacitor, diode D1's negative terminal meets alternating current power supply's live wire input L, diode D1's positive terminal meets electric capacity C1's negative terminal and L ED light source's negative terminal respectively, diode D2's positive terminal connects alternating current power supply's live wire input L, diode D2's negative terminal meets electric capacity C2's positive terminal and L ED light source's positive terminal respectively, electric capacity C1's positive terminal and electric capacity C2's negative terminal input N simultaneously.

Description

Linear L ED drive circuit and L ED lamp

Technical Field

The utility model belongs to the technical field of L ED drives, specifically relate to a linear L ED drive circuit and L ED lamp.

Background

L ED lamp has been widely used in various places because of its advantages of high efficiency, energy saving, long life, environmental protection, etc. L ED lamp needs L ED driving circuit for driving.

The traditional L ED driving circuit is mostly controlled by an integrated circuit and is realized by a switching power supply formed by a switching tube (mainly an MOS tube), the circuit structure of the L ED driving circuit is complex, the cost is high, the stability is low, and the influence of temperature and humidity is large, the MOS tube is easy to cause overhigh temperature in the uninterrupted switching process, so the service life of the MOS tube is influenced, the unstable output condition can be caused in the later use period, the service life of the L ED is too short, the output L ED has large current ripple waves and high stroboflash, the visual health is not facilitated, in the uninterrupted switching process of the MOS tube, a large EMI problem is formed, and large electromagnetic radiation can also cause harm to human bodies.

Disclosure of Invention

An object of the utility model is to provide a linear L ED drive circuit and L ED lamp are used for solving the technical problem that above-mentioned exists.

In order to achieve the purpose, the utility model adopts the technical scheme that a linear L ED drive circuit comprises a diode D1, a diode D2, a capacitor C1, capacitors C2 and a L ED light source, wherein the capacitors C1 and C2 are electrolytic capacitors, the negative end of the diode D1 is connected with the live wire input end L of an alternating current power supply, the positive end of the diode D1 is respectively connected with the negative end of the capacitor C1 and the negative end of the L ED light source, the positive end of the diode D2 is connected with the live wire input end L of the alternating current power supply, the negative end of the diode D2 is respectively connected with the positive end of the capacitor C2 and the positive end of the L ED light source, and the positive end of the capacitor C1 and the negative end of the capacitor C2 are simultaneously connected with the neutral wire input end N of the alternating current power supply.

Furthermore, the LED lamp also comprises a current limiting resistor R1, and the current limiting resistor R1 is connected in series with a loop of the L ED light source.

Further, the voltage-dependent resistor VR1 is included, and the voltage-dependent resistor VR1 is connected between the live input terminal L and the neutral input terminal N.

Further, a fuse F1 is included, and the fuse F1 is connected in series to the live input L.

Further, the diode D1 and the diode D2 are silicon diodes or germanium diodes.

Further, the withstand voltage values of the diode D1 and the diode D2 are 1000V.

The utility model also provides an L ED lamp is equipped with foretell linear L ED drive circuit.

The utility model has the advantages of:

the utility model discloses a voltage doubling effect is realized to two diodes and two electric capacity, drive L ED, need not integrated circuit, only there are few discrete components, moreover, the steam generator is simple in structure, easily realize, the present artifical and material cost that rises day by day of saving that can be very big, it is little influenced by temperature and humidity, the circuit is stable, high frequency switch components and parts are not contained in the whole circuit, so there is not EMI's problem, do not have big electromagnetic radiation, can healthily use, do not contain overheated components and parts, improvement drive circuit's that can be better stability, adopt electrolytic capacitor to carry out energy storage and filtering, make the output ripple reduce greatly, L ED lights and tends to not have the stroboflash, it is more healthy to make the illumination.

Because the voltage doubling principle is adopted, the input voltage can be adjusted within a certain range under the influence of the input voltage, L ED power and brightness can be adjusted, L ED power and brightness can be changed through different capacitance capacities, and the adjustability is good.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic circuit diagram of an embodiment of the present invention.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 1, a linear L ED driving circuit includes a diode D1, a diode D2, a capacitor C1, capacitors C2 and L ED light sources, where the capacitors C1 and C2 are electrolytic capacitors, a negative terminal of the diode D1 is connected to a live input L of an ac power source, positive terminals of the diode D1 are respectively connected to a negative terminal of the capacitor C1 and a negative terminal of the L ED light source, a positive terminal of the diode D2 is connected to a live input L of the ac power source, negative terminals of the diode D2 are respectively connected to a positive terminal of the capacitor C2 and a positive terminal of the L ED light source, and the negative terminals of the capacitor C1 and the capacitor C2 are simultaneously connected to a neutral input N of the ac power source.

The capacitor C1 and the capacitor C2 adopt electrolytic capacitors, so that the capacitance is large, the output ripple is greatly reduced, the L ED light source is lightened and tends to have no stroboflash, the illumination is healthier, and the cost is low.

In this embodiment, the L ED light source is composed of a plurality of leds L ED1 … L EDN connected in series, but not limited thereto, and in other embodiments, the L ED light source may be composed of a single led, or a plurality of leds connected in series and parallel.

In this embodiment, the diodes D1 and D2 may be various diodes such as silicon diodes and germanium diodes. Preferably, in this embodiment, the voltage withstanding values of the diode D1 and the diode D2 are 1000V to improve the stability and reliability of the driving circuit, but not limited thereto, and in other embodiments, the voltage withstanding values of the diode D1 and the diode D2 may be selected according to actual needs.

Preferably, in this embodiment, the lighting circuit further includes a current limiting resistor R1, and the current limiting resistor R1 is connected in series to the loop of the L ED light source, so that the output current is smoother, the stroboscopic effect of lighting the L ED light source is smaller, and the resistance value of the current limiting resistor R1 can be selected according to actual needs.

Further, in this specific embodiment, a varistor VR1 is further included, the varistor VR1 is connected between the live line input terminal L and the neutral line input terminal N, and when a lightning surge occurs or an abnormally high voltage is input, the whole circuit is protected by the varistor VR1, so that stability, safety and reliability are improved.

Further, in this embodiment, the power supply further includes a fuse F1, and the fuse F1 is connected in series to the live input terminal L to perform current abnormal protection, thereby improving safety and reliability.

The working principle is as follows:

when the voltage of the live wire input end L is positive and the voltage of the zero line input end N is negative, the diode D2 is turned on, the capacitor C2 is charged, and the voltage is charged to the voltage of the live wire input end L and the zero line input end N, wherein the voltage of the alternating current power supply is E2

When the voltage of the live wire input end L is negative and the voltage of the zero wire input end N is positive, the diode D1 is conducted, the capacitor C1 is charged, and the voltage is charged to

The voltage across the L ED light source is maintained constant after a period

As long as it satisfies

The forward Voltage (VF) value of the L ED light source can be larger than L ED light source, namely, the L ED light source can be turned on and lighted.

In this embodiment, the L ED light source has parameters of 190V, 38mA and 8W, the AC power source has parameters of 120V, 60Hz and 110mA, the diodes D1 and D2 have parameters of 1A/1000V, the capacitors C1 and C2 have parameters of 2.2uf/400V, and the current limiting resistor R1 has parameters of 3.3 Ω/0.5W, but not limited thereto.

In practical use, the power of the L ED light source can be adjusted by adjusting the sizes of the capacitors C1 and C2, the power of the L ED light source can be adjusted by adjusting the VF value of the L ED light source, the power of the L ED light source can be adjusted by adjusting the voltage of the input ac power source, and the adjustability is high.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A linear L ED drive circuit is characterized by comprising a diode D1, a diode D2, a capacitor C1, a capacitor C2 and a L ED light source, wherein the capacitor C1 and the capacitor C2 are electrolytic capacitors, the negative end of the diode D1 is connected with a live wire input end L of an alternating current power supply, the positive end of the diode D1 is respectively connected with the negative end of the capacitor C1 and the negative end of the L ED light source, the positive end of the diode D2 is connected with a live wire input end L of the alternating current power supply, the negative end of the diode D2 is respectively connected with the positive end of the capacitor C2 and the positive end of the L ED light source, and the positive end of the capacitor C1 and the negative end of the capacitor C2 are simultaneously connected with a neutral wire input end N of the alternating current power supply.

2. The linear L ED driver circuit as claimed in claim 1, further comprising a current limiting resistor R1, wherein the current limiting resistor R1 is connected in series with the loop of L ED light source.

3. The linear L ED driver circuit of claim 1, further comprising a voltage dependent resistor VR1, the voltage dependent resistor VR1 being coupled between the hot input L and the neutral input N.

4. The linear L ED driver circuit of claim 1, further comprising a fuse F1, the fuse F1 being connected in series to the hot input L.

5. The linear L ED driving circuit of claim 1, wherein the diodes D1 and D2 are silicon diodes or germanium diodes.

6. The linear L ED driving circuit of claim 1, wherein the diode D1 and the diode D2 have a breakdown voltage of 1000V.

7. An L ED lamp, characterized in that it is provided with a linear L ED driver circuit as claimed in any one of claims 1 to 6.