CN211267182U - Independent driving power supply for enabling LED lamp to normally emit light - Google Patents

Abstract

The utility model discloses a make normal luminous independent drive power supply of LED lamp, include: a rectifier circuit that rectifies an input alternating current to output a pulsating direct current voltage; and a constant current output circuit for converting the pulsating direct current voltage output by the rectifying circuit to output different constant direct currents; the utility model aims at providing a make the normal luminous independent drive power supply of LED lamp, make G9LED lamp export stable power after lighting, according to the different invariable direct current of constant current chip output, make the luminous chip of LED send the light of different colour temperatures, make the light that sends be torch luminous state.

Description

Independent driving power supply for enabling LED lamp to normally emit light

Technical Field

The utility model belongs to the technical field of the illumination, concretely relates to make normal luminous independent drive power supply of LED lamp.

Background

The G9 type lamp bead is a stitch type lamp bead, the lamp bead is commonly used on modern European crystal ceiling lamps, the traditional G9 lamp bead is a halogen lamp using tungsten filaments, wherein halogen is harmful substances, the lamp bead is high in temperature and high in power during working, energy is not enough, environment is protected, and the service life is short.

The LED lamp has the advantage that traditional halogen lamp does not possess as novel light source, but in view of among the prior art G9LED lamp power unstable after lighting, appear stroboflash, life-span is short, other defects that can't make the LED lamp normally luminous such as temperature height for realize that the G9LED lamp performance of comprehensive luminous is restricted, and application scene application scope is narrow, remains to be improved.

Disclosure of Invention

The utility model aims at above problem, provide an independent drive power supply who makes the LED lamp normally luminous, aim at can not take place the stroboscopic after lighting, have stable power.

In order to achieve the above object, the utility model adopts the following technical scheme:

a rectifier circuit that rectifies an input alternating current to output a pulsating direct current voltage; the rectifying circuit comprises a rectifier bridge stack BD1, and the input end of the rectifier bridge stack BD1 is connected with alternating current through a power switch K1;

a constant current output circuit for converting the pulsating direct current voltage output by the rectifying circuit to output different constant direct current; the constant current output circuit comprises a constant current chip EG2000A, a resistor R2, a resistor R3, a capacitor C1 and a capacitor C2; the power supply port VDD is connected with the negative output end of the rectifying circuit through a capacitor C2, the power supply port VCC of the constant current chip EG2000A is connected with the negative output end of the rectifying circuit through a capacitor C1, the first current adjusting end of the constant current chip EG2000A is connected with the negative output end of the rectifying circuit through a resistor R2, the second current adjusting end of the constant current chip EG2000A is connected with the negative output end of the rectifying circuit through a resistor R3, and the power supply port of the constant current chip EG2000A is connected with the positive output end of the rectifying circuit.

Further, a protection resistor R1 is also arranged between the rectifying circuit and the constant current output circuit.

Further, the bridge rectifier stack BD1 is formed by four diodes.

Compared with the prior art, the utility model, the beneficial effects are that: different constant direct currents are output according to the constant current chips, so that the LED light-emitting chips emit light with different color temperatures, and the emitted light is in a torch light-emitting state; other advantages of the present invention will be further explained in the detailed description of the invention.

Drawings

Fig. 1 is a circuit diagram of the independent driving power supply of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.

Referring to fig. 1, a circuit diagram of a lamp independent driving power supply 5 for enabling an LED lamp to normally emit light is provided, the circuit is simple in structure, a required circuit board is small, the circuit board can be placed in a barrel body capable of achieving overall light emission, color modulation can be achieved, power factor is high, and electric energy can be saved. The power supply circuit specifically comprises a power supply switch K1, a rectifying circuit and a constant current output circuit.

The rectifier circuit adopts a full-bridge rectifier bridge stack BD1 formed by four diodes, and the input end of the rectifier bridge stack BD1 is connected with alternating current through a power switch K1 and used for rectifying the input alternating current to output pulsating direct current voltage.

The constant current output circuit comprises a constant current chip EG2000A, a resistor R2, a resistor R3, a capacitor C1 and a capacitor C2. The VDD power port is connected with the negative output end of the rectifying circuit through a capacitor C2, the VCC power port of the constant current chip EG2000A is connected with the negative output end of the rectifying circuit through a capacitor C1, the first current adjusting end of the constant current chip EG2000A is connected with the negative output end of the rectifying circuit through a resistor R2, the second current adjusting end of the constant current chip EG2000A is connected with the negative output end of the rectifying circuit through a resistor R3, and the power supply port of the constant current chip EG2000A is connected with the positive output end of the rectifying circuit.

The constant current chip EG2000A converts the pulsating dc voltage output from the rectifier circuit to output different constant dc currents according to the on/off of the power switch K1. The constant current output port of the constant current chip EG2000A is connected with the cathode end of the COB packaged LED light emitting chip 3, and the anode end of the LED light emitting chip 3 is connected with the anode output end of the rectifier bridge stack, so that light with different color temperatures can be emitted according to different constant direct currents output by the constant current chip EG2000A, and the emitted light is in a torch light emitting state through the different color temperatures.

Preferably, a protection resistor R1 is further provided between the rectifying circuit and the constant current output circuit. Wherein, the resistance of R1 is 1M ohm, the resistance of R2 and R3 is 20 ohm, and the capacitance resistance of C1 and C2 is 16V 10uf, although the protection scope of the present invention is not limited to this value.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and their core concepts. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the above technical features can be combined in a proper manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.

Claims (3)

1. An independent driving power supply for normally lighting an LED lamp, comprising:

a rectifier circuit that rectifies an input alternating current to output a pulsating direct current voltage; the rectifying circuit comprises a rectifier bridge stack BD1, and the input end of the rectifier bridge stack BD1 is connected with alternating current through a power switch K1;

a constant current output circuit for converting the pulsating direct current voltage output by the rectifying circuit to output different constant direct current; the constant current output circuit comprises a constant current chip EG2000A, a resistor R2, a resistor R3, a capacitor C1 and a capacitor C2; the power supply port VDD is connected with the negative output end of the rectifying circuit through a capacitor C2, the power supply port VCC of the constant current chip EG2000A is connected with the negative output end of the rectifying circuit through a capacitor C1, the first current adjusting end of the constant current chip EG2000A is connected with the negative output end of the rectifying circuit through a resistor R2, the second current adjusting end of the constant current chip EG2000A is connected with the negative output end of the rectifying circuit through a resistor R3, and the power supply port of the constant current chip EG2000A is connected with the positive output end of the rectifying circuit.

2. The independent driving power supply of claim 1, wherein a protection resistor R1 is further disposed between the rectifying circuit and the constant current output circuit.

3. The independent driving power supply of claim 1, wherein the bridge rectifier BD1 is formed by four diodes.

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