CN218473440U

CN218473440U - DC12/24V universal voltage module

Info

Publication number: CN218473440U
Application number: CN202221843836.4U
Authority: CN
Inventors: 朱达旺; 利莉
Original assignee: Shenzhen Leadbeyond Optoelectronics Co ltd
Current assignee: Shenzhen Leadbeyond Optoelectronics Co ltd
Priority date: 2022-07-18
Filing date: 2022-07-18
Publication date: 2023-02-10
Anticipated expiration: 2032-07-18

Abstract

The utility model discloses a DC12/24V universal voltage module, including PT4115, inductance L and current sampling resistance Rs, PT4115 includes current sampling end CSN, power input end VIN, dimming end DIM, grounding end GND and power switch SW; the inductor L is connected in series with the output end of a power supply and connected in series with the LED to form a loop, the power supply input end VIN is electrically connected with the power supply, the current sampling end CSN is connected in series with the LED lamp, the dimming end is electrically connected with an external control key, the grounding end is connected with a ground wire, and the power switch SW is connected in series with the inductor L. The utility model discloses in using the module with the constant current IC of wide voltage input, through wide voltage input 12 ~ 24V's constant current drive IC, can realize the inside switch constant current of LED module in certain voltage range to adaptation 12V and 24V's DC power supply are fit for conventional DC12V on the market, DC24V power supply mixed use, bring the facility for the life of production.

Description

DC12/24V universal voltage module

Technical Field

The utility model relates to a LED uses technical field, concretely relates to general voltage module of DC 12/24V.

Background

The Light Emitting Diode (LED) is a very effective light source, is energy-saving and environment-friendly, has long service life, and along with the continuous development of the illumination industry, the LED light emitting module is rapidly developed in the illumination field with excellent energy-saving, low-carbon and green environment-friendly effects.

When an LED is used as a light source of a lighting device, the life of the lighting device depends not only on the LED but also on components such as a driving power supply. In the current application, the bottleneck of the life of the LED lighting device is still the driving power. In order to reduce the influence of the service life of a driving power supply on the service life of an LED lamp, researchers improve the existing direct-current power supply driving device on one hand, and design a brand-new circuit for directly driving an LED by alternating current on the other hand.

The input voltage of the low-voltage LED module is supplied by a direct current power supply, but the output voltage values of the conventional power supply are generally DC12V, DC24V and DC48V. Common LED modules have corresponding voltage values, and when a 12V power supply is damaged, the module cannot be normally powered by a 24V power supply.

Therefore, a DC12/24V universal voltage module is needed to solve the problem that the power supply with other voltage cannot normally supply power to the module after the power supply with single voltage fails, so as to implement the hybrid use of the conventional DC12V and DC24V power supplies in the market.

SUMMERY OF THE UTILITY MODEL

Therefore, in order to solve the above problems, a DC12/24V universal voltage module is provided, in which a constant current IC is applied to the module to realize the constant current of an internal switch of the module, so as to adapt to the mixed use of the existing 12V and 24V power supplies.

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

a DC12/24V universal voltage module comprises a PT4115, an inductor L and a current sampling resistor Rs, wherein the PT4115 comprises a current sampling end CSN, a power supply input end VIN, a dimming end DIM, a ground end GND and a power switch SW; the inductor L is connected in series with the output end of a power supply and connected in series with the LED to form a loop, the power supply input end VIN is electrically connected with the power supply, the current sampling end CSN is connected in series with the LED lamp, the dimming end is electrically connected with an external control key, the grounding end is connected with the ground wire, and the power switch SW is connected in series with the inductor L.

Preferably, the current sampling resistor Rs includes R1 and R2, and the R1 and R2 are connected in parallel.

Preferably, the PT4115 is connected in parallel with a capacitor C1.

Preferably, a schottky diode D2 is connected in parallel between the power input terminal VIN and the power switch SW.

Preferably, the inductor L is connected in series between the schottky diode D2 and the light emitting diode.

Preferably, the LED lamp is provided with a plurality of LED lamps.

Preferably, a diode D1 is connected in series between the power supply and the PT4115, and the diode DI and the schottky diode D2 are opposite in direction.

Preferably, the LED lamp comprises a shell, a lampshade, a wire and a circuit board, wherein the circuit board is provided with a diode crystal, the lampshade is arranged on the shell, and the lampshade corresponds to the position of the diode crystal.

Preferably, the side surface of the lampshade is provided with a protrusion for preventing rotation.

Preferably, the shell is provided with a round hole for installing a lampshade, and the round hole is provided with a groove corresponding to the lampshade.

The utility model provides a technical problem be, common LED module has the magnitude of voltage that corresponds, and just can not give the module normal power supply when the 12V power damage, unable adaptation conventional DC12V on the market, the current situation that DC24V power mixes and uses. The utility model discloses in using the module with the constant current IC of wide voltage input, through wide voltage input 12 ~ 24V's constant current drive IC, can realize the inside switch constant current of LED module in certain voltage range to adaptation 12V and 24V's DC power supply are fit for conventional DC12V on the market, DC24V power supply mixed use, bring the facility for the life of production.

Drawings

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

Wherein:

FIG. 1 is a schematic diagram of a DC12/24V universal voltage module circuit according to the present invention;

FIG. 2 is a schematic diagram of a three-dimensional structure of a DC12/24V universal voltage module according to the present invention;

FIG. 3 is an exploded view of a DC12/24V universal voltage module according to the present invention;

fig. 4 is an enlarged view of fig. 3 at M.

Description of the figures:

10. a housing; 11. a circular hole; 111. a groove; 20. a lamp shade; 21. a protrusion; 30. a circuit board; 31. a diode crystal; 40. and (4) conducting wires.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in figures 1 to 4 of the drawings,

a DC12/24V universal voltage module comprises a PT4115, an inductor L and a current sampling resistor Rs, wherein the PT4115 is a voltage reduction constant current source in a continuous inductor current conduction mode and is used for driving one or more 1W or 3W series LEDs, the maximum current is 1.2 amperes, and over-temperature protection can be realized.

The output current of RT4115 is adjustable and can reach 1.2 amperes at most. PT4115 can drive LEDs up to tens of watts depending on different input voltages and external devices. PT4115 has a built-in power switch SW, adopts high-end current sampling to set the average current of the LED, and can accept analog dimming and wide-range PWM dimming through a dimming end DIM pin. When the voltage of DIM is lower than 0.3v, the power switch SW is turned off, and PT4115 enters a standby state of polar operating current.

The inductor has the characteristics that the larger the inductor is, the lower the working frequency is, and the better the constant current effect is; the larger the output current is, the smaller the required inductance value is, and the inductance is convenient to select; the higher the output voltage is, the higher the efficiency is, and the efficiency of 3 series connections is higher than that of 1 series connection; the interior has the excess temperature protect function, and the outside can design excess temperature protection circuit, has dual protection to the LED.

PT4115 embeds power switch SW, adopts high-end current sampling to set up LED average current, can accept PWM through the terminal DIM pin of adjusting luminance and adjust luminance, and when the voltage of adjusting luminance terminal DIM was less than 0.3V, power switch SW turned off, PT4115 got into the standby state of extremely low operating current.

The PT4115 comprises a current sampling terminal CSN, a power input terminal VIN, a dimming terminal DIM, a ground terminal GND and a power switch SW; the inductor L is connected in series with the output end of a power supply and connected in series with the LED to form a loop, the power supply input end VIN is electrically connected with the power supply, the current sampling end CSN is connected in series with the LED lamp, the current sampling end CSN can be connected in series with one or more LED lamps, the dimming end DIM is electrically connected with an external control key, the grounding end is connected with the ground wire, and the power switch SW is connected in series with the L.

The current sampling resistor Rs comprises R1 and R2, the R1 and the R2 are connected in parallel, and the PT4115 is connected with a capacitor C1 in parallel. A schottky diode D2 is connected in parallel between the power input end VIN and the power switch SW, and the inductor L is connected in series between the schottky diode D2 and the light emitting diode.

The LED lamps are provided with a plurality of LEDs, the working efficiency can be improved, preferably three LEDs are provided, a diode D1 is connected between the power supply and the PT4115 in series, and the direction of the diode DI is opposite to that of the Schottky diode D2.

When the power input end VIN is powered on, the initial current of the inductor L and the current sampling resistor Rs is zero, the output current of the LED lighting lamp is also zero, at this time, the output of the CS comparator of the current sampling end CSN is high, the internal power switch SW is in a conducting state, and the power switch SW is at a low potential.

The current flows from the power input terminal VIN through the current sampling resistor Rs, the inductor L, the LED and the internal power switch SW, the rising speed of the current is determined by the voltage drop of the power input terminal VIN, the inductor L and the LED, a voltage difference VSCN is generated across the current sampling resistor Rs, the function of the CS comparator is to compare two or more data items to determine whether they are equal or not, or to determine the magnitude relationship and the arrangement order between them, and the CS comparator of the current sampling terminal CSN is used to compare the voltage of the power input terminal VIN with the voltage difference of the current sampling terminal.

The module has two working states:

the first state: the power switch SW is in an off state:

if (VIN-VCSN) >115mv, the output of the cs comparator goes low, the internal power switch SW is turned off, and current flows through the current sampling resistor Rs, the LED, the schottky diode D2, and the inductor L at another speed;

and a second state: the power switch SW is in an on state:

if (VIN-VCSN) <85mV, power switch SW is reopened, so that the average current over the LED is:

the average current of the LED is set by an external current sampling resistor Rs, and in the case that the DIM terminal is floating or the voltage of the external DIM terminal is higher than 2.5V (but must be lower than 5V), the average current of the LED is determined by the resistor Rs connected across VIN and CSN: IOUT =0.1/Rs (Rs ≧ 0.082 Ω), which sets the operating current of the LED.

The wide voltage is high adaptability of the electric appliance to voltage, the voltage with different grades can be applied in a certain range, and the switching constant current in the module is realized through the design.

The utility model provides a general voltage module of DC12/24V, includes shell 10, lamp shade 20, circuit board 30 and wire 40, be provided with diode crystal 31 on the circuit board 30, this diode crystal 31 is the LED lamp, lamp shade 20 is installed on shell 10, the position of this lamp shade 20 correspondence diode crystal 31, the lamp shade 20 side is provided with prevents taking place rotatory arch 21, and this lamp shade 20 is the spherical shape, and light of being convenient for evenly passes. Be provided with the round hole 11 that is used for installing lamp shade 20 on the shell 10, be provided with on the round hole 11 and correspond the bellied recess 111 of lamp shade 20, wire 40 has two, two wires 40 pass and link to each other with circuit board 30 from shell 10, lamp shade 20 and shell 10 integrated into one piece are favorable to preventing steam, dust entering.

The principle and the flow of the device are as follows:

the PT4115, the inductor L and the current sampling resistor Rs form a voltage reduction constant current LED controller, a constant current IC with wide voltage input is applied to a module, and constant current of an internal switch of the module is achieved within a certain voltage range, so that power supply of 12-24V direct current input voltage is achieved.

The utility model provides a technical problem be, common LED module has the magnitude of voltage that corresponds, and just can not give the module normal power supply when the 12V power damage, unable adaptation conventional DC12V on the market, the current situation that DC24V power mixes and uses. The utility model discloses in using the module with the constant current IC of wide voltage input, through 12 ~ 24V's of wide voltage input constant current drive IC, can realize the internal switch constant current of LED module in certain voltage range to adaptation 12V and 24V's DC power supply, DC12V, the mixed use of DC24V power that is fit for on the market conventionality brings the facility for the life of producing.

The above description is only for the preferred embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present application and the inventive concept thereof within the technical scope of the present application, and shall be covered by the scope of the present application. In addition, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A DC12/24V universal voltage module is characterized by comprising a PT4115, an inductor L and a current sampling resistor Rs, wherein the PT4115 comprises a current sampling end CSN, a power supply input end VIN, a dimming end DIM, a ground end GND and a power switch SW; the inductor L is connected in series with the output end of a power supply and connected in series with the LED to form a loop, the power supply input end VIN is electrically connected with the power supply, the current sampling end CSN is connected in series with the LED lamp, the dimming end is electrically connected with an external control key, the grounding end is connected with the ground wire, and the power switch SW is connected in series with the inductor L.

2. The DC12/24V universal voltage module as claimed in claim 1, wherein the current sampling resistor Rs includes R1 and R2, and the R1 and R2 are connected in parallel.

3. A DC12/24V universal voltage module according to claim 1, wherein the PT4115 is connected in parallel with a capacitor C1.

4. The DC12/24V universal voltage module as claimed in claim 1, wherein a schottky diode D2 is connected in parallel between the power input terminal VIN and the power switch SW.

5. The DC12/24V universal voltage module as claimed in claim 1, wherein the inductor L is connected in series between the Schottky diode D2 and the light emitting diode.

6. The DC12/24V universal voltage module as claimed in claim 1, wherein the LED lamps are provided in plural numbers.

7. The DC12/24V universal voltage module as claimed in claim 4, wherein a diode D1 is connected in series between the power supply and the PT4115, and the diode DI and the Schottky diode D2 are in opposite directions.

8. The DC12/24V universal voltage module according to any one of claims 1 to 7, comprising a housing, a lamp cover, a lead and a circuit board, wherein the circuit board is provided with a diode crystal, the lamp cover is mounted on the housing, and the lamp cover corresponds to the position of the diode crystal.

9. The DC12/24V universal voltage module according to claim 8, wherein the side of the lampshade is provided with a protrusion for preventing rotation.

10. The DC12/24V universal voltage module according to claim 9, wherein the housing is provided with a circular hole for mounting a lamp cover, and the circular hole is provided with a groove corresponding to the projection of the lamp cover.