CN202425163U - Input voltage adaptive circuit for LED (Light Emitting Diode) light source - Google Patents

Abstract

The utility model provides an input voltage adaptive circuit for an LED (Light Emitting Diode) light source. The input voltage adaptive circuit is connected with an LED driving module so as to drive an LED light emitter. The input voltage adaptive circuit comprises a reverse connection prevention module, a step-up module, a power input indication module and a step-down module; after an input voltage is stabilized, the input voltage is connected into the LED driving module, and the LED driving module drives the LED light emitter in a certain manner; the reverse connection prevention module is arranged at the input end of the step-up module; and the output end of the step-up module is connected with the power input indication module and the step-down module. With the adoption of the input voltage adaptive circuit, the LED driving module can have a wide voltage input range of 5-26 V, and the circuit is controlled to stably work, so that the input voltage adaptive circuit is applicable to most conventional low-voltage LED light sources.

Description

LED light source input voltage adaptive circuit

technical field

The utility model belongs to the field of intelligent lighting, in particular to an LED light source input voltage adaptive circuit.

Background technique

LED light source has a series of unique advantages such as energy saving, environmental protection, long life, fast response, rich colors, good controllability, safety, etc. The field has good application prospects.

Most of the common LED light sources at this stage are powered by 12V or 24V. The power supply can be provided by the mains conversion or the battery. The fluctuation of the grid voltage or the drop of the battery power usually causes a certain change in the output of the LED driver module, which in turn affects the lighting of the LED luminous body. effect and working life.

Utility model content

In view of this, the utility model provides an LED light source input voltage adaptive circuit, which can make the LED drive module have a wide voltage input range of 5V-26V, and the control circuit works stably, and is suitable for most conventional low-voltage LED light sources.

In order to achieve the above object, the technical scheme of the utility model is as follows:

An LED light source input voltage adaptive circuit, which is connected to an LED driver module to drive an LED illuminant, in particular, the LED light source input voltage adaptive circuit includes an anti-reverse connection module, a boost module, a power input indication module and a step-down module , the anti-reverse connection module is placed at the input end of the boost module, and the output end of the boost module is connected with a power input indicating module and a step-down module.

Preferably, in the above LED light source input voltage adaptive circuit, the anti-reverse connection module is a diode.

Preferably, in the above LED light source input voltage adaptive circuit, the diode is a Schottky diode.

Preferably, in the above LED light source input voltage adaptive circuit, the power input indicating module is composed of a light emitting diode and a current limiting resistor connected in series.

Compared with the prior art, the LED light source input voltage adaptive circuit of the utility model first raises the input voltage to a certain set fixed value through the boost module, and then lowers the output voltage of the boost module to a certain value by the step-down module. A certain set voltage value can enable the LED driver module to obtain a stable voltage supply when the power input changes, and the control circuit works stably and reliably.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can obtain other drawings according to these drawings without any creative effort.

Fig. 1 shows the structural block diagram of the LED light source input voltage adaptive circuit in the specific embodiment of the utility model;

FIG. 2 is a specific circuit diagram of the LED light source input voltage adaptive circuit in FIG. 1 .

Detailed ways

The technical solutions in the embodiments of the utility model are clearly and completely described below, obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

FIG. 1 is a structural block diagram of an LED light source input voltage adaptive circuit in a specific embodiment of the present invention.

In FIG. 1 , the output terminal of the LED light source input voltage adaptive circuit 10 is connected to the input terminal of the LED driving module 15 , and the output terminal of the LED driving module 15 is connected to the input terminal of the LED illuminant 16 .

The LED light source input voltage adaptive circuit 10 successively boosts and bucks the voltage at the input terminal and then outputs it in a stable voltage. The LED driving module 15 receives the stable voltage and drives the LED illuminant 16 in a certain way.

The LED light source input voltage adaptive circuit 10 includes an anti-reverse connection module 11, a boost module 12, a power input indicating module 14 and a step-down module 13, and the anti-reverse connection module 11 is placed at the input end of the boost module 12, The output terminal of the step-up module 12 is connected with the power input indicating module 14 and the step-down module 13 . The anti-reverse connection module 11 preferably adopts a Schottky diode.

FIG. 2 is a specific circuit diagram of the LED light source input voltage adaptive circuit in FIG. 1 .

The boost module 12 is mainly composed of an integrated chip 121, and the integrated chip 121 of the boost module 12 is preferably LM2587, and the boost module 12 can raise the input voltage of 5V-26V to 28V.

The step-down module 13 is mainly composed of an integrated chip 132. The integrated chip 132 of the step-down module 13 is preferably LM2596. The step-down module 13 can reduce the output voltage of the boost module 12 to a certain set value.

The output end of the boost module 12 is connected to the input end of the step-down module 13, the input end of the boost module 12 is connected with a diode, and the diode constitutes the anti-reverse connection module 11, and the output end of the boost module 12 is also connected with a light emitting diode 141 A light-emitting branch formed in series with the current-limiting resistor 142, the light-emitting circuit constitutes the power input indicating module 14; the feedback terminal of the step-down module 13 is an adjustable resistor 131, and one end of the adjustable resistor 131 is grounded through the resistor 132, The other end is grounded through a capacitor 133 . By changing the resistance value of the adjustable resistor 131, the output voltage of the step-down module 13 can be adjusted to meet the actual application requirements of LED illuminants with different specifications.

The LED light source input voltage self-adaptive circuit of the utility model first raises the input voltage to a certain set fixed value through the boost module, and then lowers the output voltage of the boost module to a certain set voltage value by the step-down module, which can The LED drive module can obtain a stable voltage supply in the power input range of 5V-26V, so as to ensure the stable operation of the control circuit, and is suitable for most conventional low-voltage LED light sources.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. led light source input voltage adapting circuit; Connect the LED driver module with the driving LED luminous element; It is characterized in that: said led light source input voltage adapting circuit comprises anti-reverse module, boost module, power supply input indicating module and step-down module; Said anti-reverse module places the input of said boost module, and the output of said boost module connects power supply input indicating module and step-down module.

2. led light source input voltage adapting circuit according to claim 1 is characterized in that: said anti-reverse module is a diode.

3. led light source input voltage adapting circuit according to claim 2 is characterized in that: said diode is a Schottky diode.

4. led light source input voltage adapting circuit according to claim 1 is characterized in that: said power supply input indicating module is made up of light-emitting diode and current-limiting resistance series connection.

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