CN215345146U

CN215345146U - Constant voltage LED lamp driving power supply circuit

Info

Publication number: CN215345146U
Application number: CN202120786726.8U
Authority: CN
Inventors: 罗陶; 刘霞
Original assignee: Shenzhen Ivolt Technology Co ltd
Current assignee: Shenzhen Ivolt Technology Co ltd
Priority date: 2021-04-17
Filing date: 2021-04-17
Publication date: 2021-12-28
Anticipated expiration: 2031-04-17

Abstract

The utility model provides a constant-voltage LED lamp driving power supply circuit, belonging to the technical field of intelligent illumination; including A line, with the parallelly connected B line of A line, it has first gas discharge tube GDT1 to establish ties on the A line, and it has second gas discharge tube GDT2 to establish ties on the B line, and A line, B line are established ties respectively and are had the rectifier unit, and the rectifier unit includes: the rectifier bridge Q is composed of four diodes Q1, Q2, Q3 and Q4, the fifth reactor L5, the fifth capacitor C5 and the sixth capacitor C6 form a filter circuit, one ends of the fifth capacitor C5 and the sixth capacitor C6 are respectively connected with two ends of the fifth reactor L5, a connection point of the fifth reactor L5 and the sixth capacitor C6, and another end connection point of the fifth capacitor C5 and the sixth capacitor C6 are respectively connected with two input terminals of a DC/DC conversion unit, and the DC/DC conversion unit is connected with a current stabilizing and voltage stabilizing circuit LC. The problems of poor current and voltage stability, no lightning stroke resistance, no energy conservation and no environmental protection are solved.

Description

Constant voltage LED lamp driving power supply circuit

Technical Field

The utility model provides a constant-voltage LED lamp driving power supply circuit, and belongs to the technical field of intelligent illumination.

Background

Along with the rapid development of modern intelligent buildings, the importance of intelligent LED illumination control is more and more obvious, and compared with the traditional illumination control mode mainly based on switching value and manual control, the intelligent LED illumination control system has the problems of energy conservation, environmental protection, safety, stability and flexible use. The traditional public space LED lamp lighting circuit LED lamp is always on day to night, resources are wasted, the cost is high, the LED lamp is often subjected to sudden and sudden flashing due to unstable voltage, the LED lamp is inconvenient to popularize and use widely, meanwhile, the LED lamp bead is sensitive to static electricity and poor in lightning surge resistance, and the problem that how to enable the LED lighting lamp to work stably under the harsh lightning condition is solved.

SUMMERY OF THE UTILITY MODEL

The constant-voltage LED lamp driving power supply circuit provided by the utility model is simple in structure, and can solve the problems of poor current and voltage stability, no lightning stroke resistance, no energy conservation and no environmental protection.

In order to solve the above problems, the present invention provides the following technical solutions: the utility model provides a constant voltage LED lamp drive power supply circuit, includes A line, the B line parallelly connected with A line, it has first gas discharge tube GDT1 to establish ties on the A line, it has second gas discharge tube GDT2 to establish ties on the B line, be equipped with common mode inductance between first gas discharge tube GDT1 and the second gas discharge tube GDT2, A line, B line are established ties respectively and are had rectifier unit, rectifier unit includes: the lighting circuit comprises a rectifier bridge Q, a fifth reactor L5, a fifth capacitor C5 and a sixth capacitor C6, wherein the rectifier bridge Q is composed of four diodes Q1, Q2, Q3 and Q4, the fifth reactor L5, the fifth capacitor C5 and the sixth capacitor C6 form a filter circuit, one ends of the fifth capacitor C5 and the sixth capacitor C6 are respectively connected with two ends of a fifth reactor L5, a connection point of the fifth reactor L5 and a sixth capacitor C6, a connection point of the fifth capacitor C5 and the other end of a sixth capacitor C6 are respectively connected with two input terminals of a DC/DC conversion unit, the DC/DC conversion unit is connected with a steady-current stabilizing circuit LC, the steady-current LC comprises a sixth reactor L6 and a seventh capacitor C7, two ends of the seventh capacitor C7 are used for being connected with an automatic control lighting circuit, and the automatic control lighting circuit comprises a unidirectional control lighting circuit, a unidirectional control lighting circuit VS, an LED lamp, a voltage detection thyristor integrated chip MAX837 and a voltage detection integrated chip MAX837, A slide rheostat RP and a photo resistor RG.

Two ends of the first gas discharge tube GDT1 are respectively connected with a first pin a and a second pin b of a common mode inductor, and two ends of the second gas discharge tube GDT1 are respectively connected with a third pin c and a fourth pin d of the common mode inductor.

The connection point between the fifth reactor L5 and the fifth capacitor C5, and the connection point between the other ends of the fifth capacitor C5 and the sixth capacitor C6 are connected to the two

output terminals

1 and 2 of the rectifier bridge Q, respectively.

An input end of the sixth reactor L6 is connected in series to the first output terminal 1 of the DC/DC conversion unit, and the seventh capacitor C7 is connected in parallel between an output end of the sixth reactor L6 and the second output terminal 2 of the DC/DC conversion unit.

The LED lamp is connected with the anode of the unidirectional thyristor VS, the trigger end of the unidirectional thyristor VS is connected with the output end of the voltage detection integrated chip MAX837, and the output end of the voltage detection integrated chip MAX837 is connected with the light emitting diode D1.

The input end of the voltage detection integrated chip MAX837 is connected with one end of a photosensitive resistor RG, and the other end of the photosensitive resistor RG is connected with the negative output end of the DC/DC conversion unit through a slide rheostat RP.

A voltage stabilizing diode VD1 is connected in parallel between the positive output end and the negative output end of the DC/DC conversion unit, the negative electrode of the voltage stabilizing diode VD1 is connected with the positive output end of the DC/DC conversion unit, and the positive electrode of the voltage stabilizing diode VD1 is connected with the negative output end of the DC/DC conversion unit.

The utility model has the beneficial effects that: the LED lamp has a simple structure, the problems of flickering of the LED lamp caused by unstable current and voltage and prolonging of the service life of the LED lamp are solved through the arrangement of the DC/DC conversion unit and the steady-current voltage stabilizing circuit LC, high voltage is clamped and absorbed through the arrangement of the first gas discharge tube GDT1 and the second gas discharge tube GDT2 to better protect a circuit, and the problems of energy saving and resource waste caused by large-day lamp turning-on are solved through the matched use of the slide rheostat RP and the photoresistor RG.

Drawings

Fig. 1 is a schematic structural diagram of a constant voltage LED lamp driving power circuit according to the present invention.

Fig. 2 is a schematic diagram of a partial left-segment enlarged structure of a constant-voltage LED lamp driving power circuit according to the present invention.

Fig. 3 is a schematic diagram of a partially enlarged middle section of a constant voltage LED lamp driving power circuit according to the present invention.

Fig. 4 is a schematic diagram of a partial right-end enlarged structure of a constant voltage LED lamp driving power circuit according to the present invention.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

According to the illustration of FIG. 1: the utility model provides a constant-voltage LED lamp driving power supply circuit which comprises: the rectifier comprises a line A and a line B connected with the line A in parallel, wherein a first gas discharge tube GDT1 is connected on the line A in series, a second gas discharge tube GDT2 is connected on the line B in series, a common-mode inductor is arranged between the first gas discharge tube GDT1 and the second gas discharge tube GDT2, a rectifier unit is connected on the line A and the line B in series respectively, and the rectifier unit comprises: the lighting circuit comprises a rectifier bridge Q, a fifth reactor L5, a fifth capacitor C5 and a sixth capacitor C6, wherein the rectifier bridge Q is composed of four diodes Q1, Q2, Q3 and Q4, the fifth reactor L5, the fifth capacitor C5 and the sixth capacitor C6 form a filter circuit, one ends of the fifth capacitor C5 and the sixth capacitor C6 are respectively connected with two ends of a fifth reactor L5, a connection point of the fifth reactor L5 and a sixth capacitor C6, a connection point of the fifth capacitor C5 and the other end of a sixth capacitor C6 are respectively connected with two input terminals of a DC/DC conversion unit, the DC/DC conversion unit is connected with a steady-current stabilizing circuit LC, the steady-current LC comprises a sixth reactor L6 and a seventh capacitor C7, two ends of the seventh capacitor C7 are used for being connected with an automatic control lighting circuit, and the automatic control lighting circuit comprises a unidirectional control lighting circuit, a unidirectional control lighting circuit VS, an LED lamp, a voltage detection thyristor integrated chip MAX837 and a voltage detection integrated chip MAX837, A sliding rheostat RP and a photoresistor RG; two ends of the first gas discharge tube GDT1 are respectively connected with a first pin a and a second pin b of a common-mode inductor, and two ends of the second gas discharge tube GDT1 are respectively connected with a third pin c and a fourth pin d of the common-mode inductor; a connection point of the fifth reactor L5 and the fifth capacitor C5, and connection points of the other ends of the fifth capacitor C5 and the sixth capacitor C6 are respectively connected with two

output terminals

1 and 2 of the rectifier bridge Q; an input end of the sixth reactor L6 is connected in series to the first output terminal 1 of the DC/DC conversion unit, and the seventh capacitor C7 is connected in parallel between an output end of the sixth reactor L6 and the second output terminal 2 of the DC/DC conversion unit; the LED lamp is connected with the anode of a unidirectional thyristor VS, the trigger end of the unidirectional thyristor VS is connected with the output end of a voltage detection integrated chip MAX837, and the output end of the voltage detection integrated chip MAX837 is connected with a light emitting diode D1; the input end of the voltage detection integrated chip MAX837 is connected with one end of a photoresistor RG, and the other end of the photoresistor RG is connected with the negative output end of the DC/DC conversion unit through a slide rheostat RP; a voltage stabilizing diode VD1 is connected in parallel between the positive output end and the negative output end of the DC/DC conversion unit, the negative electrode of the voltage stabilizing diode VD1 is connected with the positive output end of the DC/DC conversion unit, and the positive electrode of the voltage stabilizing diode VD1 is connected with the negative output end of the DC/DC conversion unit.

Principle of the utility model

In summary, the following steps: when an instantaneous high voltage enters the line A and the line B, and when the line A and the line B pass through the common-mode inductor, the instantaneous high voltage is generated on a first pin a, a second pin B, a third pin C and a fourth pin d of the common-mode inductor, the high voltage is clamped and absorbed by a first gas discharge tube GDT1 and a second gas discharge tube GDT2, so that the voltage of a rear-stage circuit is protected within a normal range, a mains supply is changed into direct current and rectified through a rectifying unit, then the direct current is converted through a DC/DC conversion unit, the electric energy after the direct current conversion is suitable for illumination of an automatic control illumination circuit, direct current with stable voltage is obtained on an output terminal of the DC/DC conversion unit, an LC circuit formed by a sixth reactor L6 and a seventh capacitor C7 is mainly used for stabilizing current, and when the output current of the reactor is increased, the voltage drop of the sixth reactor L6 is increased, so that the output current is reduced; on the contrary, when the output current is reduced, the voltage drop of the sixth reactor L6 is reduced, so that the output current is increased, the seventh capacitor C7 is used for filtering out alternating current components generated when the current changes, the light intensity of the finally driven LED illuminating lamp is stable and soft, and has no flicker sense, so that the service life of the LED illuminating lamp can be prolonged, when the LED illuminating lamp works in the daytime, the photoresistor RG is irradiated by natural light to present a low-resistance state, the level of the input end of the voltage detection integrated chip MAX837 is lower than the valve voltage (1.2V), the output end of the voltage detection integrated chip MAX837 outputs a low level, the unidirectional thyristor VS has no trigger signal and is in a turn-off state, the LED lamp is not lighted, and the voltage detection integrated chip MAX837 is in a monitoring state; when the day look darkens gradually, the resistance of photo resistance RG is along with the grow, voltage detection integrated chip MAX 837's input level constantly increases, when being higher than valve voltage (1.2V), voltage detection integrated chip MAX 837's output high level, one-way thyristor VS receives trigger signal department and carries out the on-state, the LED lamp lights, slide rheostat RP's resistance can also be adjusted, the node of the output high level of adjustment voltage detection integrated chip MAX837, can adjust photo resistance's sensitivity, high durability and convenient use, and the circuit is simple, and is low in cost. The utility model has simple structure and can solve the problems of poor current and voltage stability, no lightning stroke resistance, no energy saving and environmental protection.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A constant voltage LED lamp driving power supply circuit is characterized in that: the rectifier comprises a line A and a line B connected with the line A in parallel, wherein a first gas discharge tube GDT1 is connected on the line A in series, a second gas discharge tube GDT2 is connected on the line B in series, a common-mode inductor is arranged between the first gas discharge tube GDT1 and the second gas discharge tube GDT2, a rectifier unit is connected on the line A and the line B in series respectively, and the rectifier unit comprises: the lighting circuit comprises a rectifier bridge Q, a fifth reactor L5, a fifth capacitor C5 and a sixth capacitor C6, wherein the rectifier bridge Q is composed of four diodes Q1, Q2, Q3 and Q4, the fifth reactor L5, the fifth capacitor C5 and the sixth capacitor C6 form a filter circuit, one ends of the fifth capacitor C5 and the sixth capacitor C6 are respectively connected with two ends of a fifth reactor L5, a connection point of the fifth reactor L5 and a sixth capacitor C6, a connection point of the fifth capacitor C5 and the other end of a sixth capacitor C6 are respectively connected with two input terminals of a DC/DC conversion unit, the DC/DC conversion unit is connected with a steady-current stabilizing circuit LC, the steady-current LC comprises a sixth reactor L6 and a seventh capacitor C7, two ends of the seventh capacitor C7 are used for being connected with an automatic control lighting circuit, and the automatic control lighting circuit comprises a unidirectional control lighting circuit, a unidirectional control lighting circuit VS, an LED lamp, a voltage detection thyristor integrated chip MAX837 and a voltage detection integrated chip MAX837, A slide rheostat RP and a photo resistor RG.

2. The constant voltage LED lamp driving power supply circuit according to claim 1, wherein: two ends of the first gas discharge tube GDT1 are respectively connected with a first pin a and a second pin b of a common mode inductor, and two ends of the second gas discharge tube GDT1 are respectively connected with a third pin c and a fourth pin d of the common mode inductor.

3. The constant voltage LED lamp driving power supply circuit according to claim 1, wherein: the connection point between the fifth reactor L5 and the fifth capacitor C5, and the connection point between the other ends of the fifth capacitor C5 and the sixth capacitor C6 are connected to the two output terminals 1 and 2 of the rectifier bridge Q, respectively.

4. The constant voltage LED lamp driving power supply circuit according to claim 1, wherein: an input end of the sixth reactor L6 is connected in series to the first output terminal 1 of the DC/DC conversion unit, and the seventh capacitor C7 is connected in parallel between an output end of the sixth reactor L6 and the second output terminal 2 of the DC/DC conversion unit.

5. The constant voltage LED lamp driving power supply circuit according to claim 1, wherein: the LED lamp is connected with the anode of the unidirectional thyristor VS, the trigger end of the unidirectional thyristor VS is connected with the output end of the voltage detection integrated chip MAX837, and the output end of the voltage detection integrated chip MAX837 is connected with the light emitting diode D1.

6. The constant voltage LED lamp driving power supply circuit according to claim 1, wherein: the input end of the voltage detection integrated chip MAX837 is connected with one end of a photosensitive resistor RG, and the other end of the photosensitive resistor RG is connected with the negative output end of the DC/DC conversion unit through a slide rheostat RP.

7. The constant voltage LED lamp driving power supply circuit according to claim 1, wherein: a voltage stabilizing diode VD1 is connected in parallel between the positive output end and the negative output end of the DC/DC conversion unit, the negative electrode of the voltage stabilizing diode VD1 is connected with the positive output end of the DC/DC conversion unit, and the positive electrode of the voltage stabilizing diode VD1 is connected with the negative output end of the DC/DC conversion unit.