CN215420859U

CN215420859U - Novel LED drive circuit

Info

Publication number: CN215420859U
Application number: CN202122117221.5U
Authority: CN
Inventors: 黄志伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2022-01-04
Anticipated expiration: 2031-09-02

Abstract

The utility model discloses a novel LED driving circuit, which comprises a rectifying module, a voltage regulating module and a constant current output module which are electrically connected in sequence, wherein the input end of the rectifying module is connected with an external power supply, the output end of the constant current output module is connected with an LED lamp, the rectifying module comprises a rectifying bridge D, the voltage regulating module comprises a plurality of LED lamp beads connected in series and/or in parallel, the constant current module comprises a plurality of constant current diodes DS connected in series and/or in parallel and internally provided with temperature induction, the constant current modules are used for providing over-temperature protection, and when the temperature exceeds a set value, the output current is stabilized or reduced to protect the driving circuit; output can be adjusted according to the voltage and current demand of LED lamps and lanterns through above-mentioned structure to have with low costs, light efficiency height and low power dissipation's advantage, have very high price/performance ratio, accord with the user demand.

Description

Novel LED drive circuit

Technical Field

The utility model relates to the field of LED driving, in particular to a novel LED driving circuit.

Background

The driving technologies which are popular in the field of LED illumination comprise isolated driving, non-isolated driving and single-section or multi-section constant current alternating current direct driving technologies, and the technologies have common problems: 1. the cost is higher; 2. EMI harmonic wave, THD and the like are serious 3, the electrical conversion efficiency is low, and for example, in a single-stage constant current driving technology, more than 75% of the EMI harmonic wave, THD and the like are difficult to achieve; therefore, a new LED driving circuit is urgently needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a novel LED driving circuit.

The technical scheme adopted by the embodiment of the utility model for solving the technical problem is as follows: the utility model provides a novel LED drive circuit, including the rectifier module of electricity connection in order, voltage regulation module and constant current output module, rectifier module's input and external power source are connected, constant current output module's output and LED lamp are connected, rectifier module includes rectifier bridge D, voltage regulation module includes that a plurality of is established ties and/or parallelly connected LED lamp pearl, constant current module includes that a plurality of is established ties and/or parallelly connected and built-in temperature-sensing's constant current diode DS for provide the excess temperature protection, stable or reduce output current in order to protect drive circuit when the temperature exceedes the setting value.

Furthermore, the novel LED driving circuit further comprises a capacitor bank, wherein two ends of the capacitor bank are respectively connected with the output end of the rectifying module and the output end of the constant current output module, and the capacitor bank comprises a plurality of capacitors C which are connected in series and/or in parallel.

Further, the novel LED driving circuit further comprises a piezoresistor MOV, and two ends of the piezoresistor MOV are respectively connected with the rectifying module and the voltage regulating module.

Further, the novel LED drive circuit further comprises a surge protection device PTC, and two ends of the surge protection device PTC are connected with the rectifying module and the voltage regulating module respectively.

The utility model has the beneficial effects that: a novel LED drive circuit comprises a rectifier module, a voltage regulation module and a constant current output module which are electrically connected in sequence, wherein the input end of the rectifier module is connected with an external power supply, the output end of the constant current output module is connected with an LED lamp, the rectifier module comprises a rectifier bridge D, the voltage regulation module comprises a plurality of LED lamp beads connected in series and/or in parallel, the constant current module comprises a plurality of constant current diodes DS connected in series and/or in parallel and provided with a temperature sensor in a built-in mode, the constant current modules are used for providing over-temperature protection, and when the temperature exceeds a set value, the output current is stabilized or reduced to protect the drive circuit; output can be adjusted according to the voltage and current demand of LED lamps and lanterns through above-mentioned structure to have with low costs, light efficiency height and low power dissipation's advantage, have very high price/performance ratio, accord with the user demand.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a circuit diagram of a novel LED driving circuit.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, a plurality of means is two or more, and greater than, less than, more than, etc. are understood as excluding the present number, and greater than, less than, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless explicitly defined otherwise, the terms "disposed," "mounted," "connected," and the like are to be understood in a broad sense, and for example, may be directly connected or indirectly connected through an intermediate; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be a mechanical connection; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above-mentioned words in the present invention can be reasonably determined by those skilled in the art in combination with the detailed contents of the technical solutions.

Referring to fig. 1, a novel LED driving circuit includes a rectifier module 10, a voltage regulator module 20 and a constant current output module 30 electrically connected in sequence, an input end of the rectifier module 10 is connected with an external power supply, an output end of the constant current output module 30 is connected with an LED lamp, the rectifier module 10 includes a rectifier bridge D, the voltage regulator module 20 includes a plurality of series and/or parallel constant current diodes DS with built-in temperature sensing for providing over-temperature protection, and when the temperature exceeds a set value, the output current is stabilized or reduced to protect the driving circuit.

The novel LED driving circuit further comprises a capacitor bank, wherein two ends of the capacitor bank are respectively connected with the output end of the rectifying module 10 and the output end of the constant current output module 30, and the capacitor bank comprises a plurality of capacitors C which are connected in series and/or in parallel.

The novel LED driving circuit further comprises a piezoresistor MOV, and two ends of the piezoresistor MOV are respectively connected with the rectifying module 10 and the voltage regulating module 20.

The novel LED drive circuit further comprises an anti-surge device PTC, and two ends of the anti-surge device PTC are respectively connected with the rectifying module 10 and the voltage regulating module 20.

The technical implementation scenario of the utility model is as follows: the external mains supply 220Vac or 110Vac, Vac external supply current voltage, through the rectifier module 10, the voltage is approximately vacx1.4 equal to Vin, the input current flows to the voltage regulation module 20 composed of 1 or more LED lamp bead groups after being rectified by the rectifier module 10, each LED lamp bead group includes a plurality of LED lamp beads connected in series, according to the designed LED lamp bead voltage current characteristics and the required output light flux and color rendering index of the lighting fixture, the voltage is reduced from Vin to Vi, Vi should be designed to the lowest value, so that the constant current required by the output system is supplied to the constant current output module composed of one or more constant current diode DS groups, each constant current diode DS group includes a plurality of constant current diodes DS connected in series, ideally, Vin is reduced to Vi, the lower the constant current diodes have lower power consumption, the system can be designed to have very low system power consumption, if Vin-Vi LED lamp beads are lower, the lower the power consumption of the constant current diode Ds is, the lower the cost is, and the multi-choice LED lamp beads can be easily selected and designed to meet the requirements of an LED lighting system with high lighting effect and low power consumption.

In addition, the system can be additionally provided with a group of capacitors C connected in series and/or in parallel, the capacitors C are used as buffers according to the voltage and current requirements of the system, and the output current optimizes important ripple parameters of the system, so that the output flicker of the LED lighting system is reduced, and the user experience value of the product is reduced.

Specific examples of implementation:

1. when a 9W bulb lamp is driven, after commercial power is rectified, current passes through an LED lamp bead group from Vin, the LED lamp bead group comprises 7 or more than 7 LED lamp beads and is connected to 1 constant current Diode (DS), Vin is externally connected with a capacitor C to a loop, the design can flexibly provide different light effects, different color rendering indexes and different luminous fluxes, the LED lamp can be driven only by using one string of LED lamp beads and one constant current Diode (DS) as long as a proper LED lamp is selected, the cost is optimized, and the PCB design is simplest;

2. when the LED bulb is applied to driving a lamp tube, the lamp tube can be 0.6M, 1.2M and 1.5M, the cost is optimized, the LED bulb groups respectively correspond to 48, 96 and 128 LED bulbs, the power is generally 0.2W, the current of an SMD 2835-level constant current diode DS is generally within 30mA, the cost is optimized, the PCB design is simplest, the heat dissipation is most effective, and the service life of a product is longest;

3. outdoor lamps, for example, Nx 10W's high-power lamps and lanterns, when N equals 3, after the commercial power rectification Vin through 3 LED lamp pearl groups that connect in parallel each other, every LED lamp pearl group includes 10 LED lamp pearls of establishing ties, and the power of every cluster is 10W, 3 constant current diode DS groups of UNICOM, and the current value of optimization 20-30mA, bigger power is according to the proportion N equals 3 and is 30W, and N equals 10 and is 100W, and general outdoor lighting 1000 within N equals 10.

It is to be understood that the present invention is not limited to the above-described embodiments, and that equivalent modifications and substitutions may be made by those skilled in the art without departing from the spirit of the present invention, and that such equivalent modifications and substitutions are to be included within the scope of the appended claims.

Claims

1. A novel LED drive circuit is characterized in that: the LED lamp is characterized by comprising a rectifying module (10), a voltage regulating module (20) and a constant current output module (30) which are electrically connected in sequence, wherein the input end of the rectifying module (10) is connected with an external power supply, the output end of the constant current output module (30) is connected with an LED lamp, the rectifying module (10) comprises a rectifying bridge D, the voltage regulating module (20) comprises a plurality of LED lamp beads which are connected in series and/or in parallel, the constant current module comprises a plurality of constant current diodes DS which are connected in series and/or in parallel and are provided with temperature sensing in a built-in mode, the constant current modules are used for providing over-temperature protection, and when the temperature exceeds a set value, the output current is stabilized or reduced so as to protect a driving circuit.

2. The novel LED driving circuit according to claim 1, wherein: the rectifier circuit further comprises a capacitor bank, wherein two ends of the capacitor bank are respectively connected with the output end of the rectifier module (10) and the output end of the constant current output module (30), and the capacitor bank comprises a plurality of capacitors C which are connected in series and/or in parallel.

3. The novel LED driving circuit according to claim 1, wherein: the rectifier circuit further comprises a voltage dependent resistor MOV, and two ends of the voltage dependent resistor MOV are respectively connected with the rectifier module (10) and the voltage regulating module (20).

4. The novel LED driving circuit according to claim 1, wherein: the power supply further comprises an anti-surge device PTC, and two ends of the anti-surge device PTC are respectively connected with the rectifying module (10) and the voltage regulating module (20).