CN212876163U

CN212876163U - LED power drive IC control circuit

Info

Publication number: CN212876163U
Application number: CN202022260246.6U
Authority: CN
Inventors: 裴金锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-04-02
Anticipated expiration: 2030-10-12

Abstract

The utility model relates to the technical field of LED power supply driving, in particular to an LED power supply driving IC control circuit, the circuit comprises a winding resistor, a rectifier bridge stack, a discharge resistor, an LED light source module group, an electrolytic capacitor, a chip capacitor and a plurality of IC chips, the winding resistors comprise a first winding resistor and a second winding resistor, the first winding resistor and the second winding resistor are respectively connected with the rectifier bridge stack, the LED light source module group and the IC chip are respectively connected with the rectifier bridge stack, the electrolytic capacitor and the chip capacitor are connected with the LED light source module group in parallel, the discharge resistor is arranged between the rectifier bridge stack and the LED light source module group, the output current does not change along with the voltage of the OUT port, so that better constant current performance is achieved, and the stability is greatly improved; furthermore, the utility model discloses system structure is simple, and peripheral component is few, and the scheme is with low costs, and the circuit is simple, and the stable performance is safe.

Description

LED power drive IC control circuit

Technical Field

The utility model relates to a LED power drive technical field especially indicates a LED power drive IC control circuit.

Background

The LED driving IC chip is a driving chip applied to an LED, and is mainly used to control a current passing through the LED to achieve an effect of making the LED emit light, and is benefited by the continuous expansion of an application area of the LED, the development of the LED driving IC chip is also continuously progressed, and an industrial scale is continuously expanded. The LED light emitting principle is to convert electrical energy into light, that is, applying current to a compound semiconductor, and releasing excess energy in the form of light through the combination of electrons and holes, thereby achieving the effect of light emission. Because the brightness of the light is determined by the current, the stronger the current passing through the LED, the brighter the light, therefore, the stability of the current will affect the quality of the LED light emission, generally, the method of controlling the LED current will adopt the way of supplying fixed voltage, and adjust the current intensity passing through the LED in the way of resistance, which is the solution with the lowest cost, so the disadvantage is that the resistance not only increases the power consumption, but also can increase the heat energy, reduce the life of the LED, and at the same time, when the voltage of the power supply source changes, the current amount passing through the LED can not be adjusted in time, thus the phenomenon of unstable LED light emission may occur. Due to the requirement for controlling the LED current is increased, the demand of the LED drive IC chip is also increased, and the LED drive IC chip capable of providing accurate current is expected to become the mainstream of the market under the conditions that the application of the LED backlight source is greatly increased and the resolution of the LED large-scale advertising board is continuously improved. However, the existing LED driving IC chip still has the disadvantages of poor automatic dimming capability, low stability, and the like.

SUMMERY OF THE UTILITY MODEL

To the technical problem that above-mentioned prior art exists, the utility model provides a simple structure, with low costs, the reliability is high, the good LED power drive IC control circuit of stability.

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

the utility model provides a LED power drive IC control circuit, the circuit includes winding resistance, rectifier bridge heap, discharge resistance, LED light source module group, electrolytic capacitor, paster electric capacity and a plurality of IC chip, winding resistance includes first winding resistance and second winding resistance, first winding resistance and second winding resistance respectively with the rectifier bridge heap is connected, LED light source module group and IC chip respectively with the rectifier bridge heap is connected, electrolytic capacitor and paster electric capacity with LED light source module group meets, discharge resistance set up in the rectifier bridge heap with between the LED light source module group, and with the IC chip meets each other, the IC chip is provided with REXT resistance, REXT resistance sets up to 5mA-60 mA.

Preferably, the IC chip includes a first IC chip and a second IC chip, the first IC chip is provided with a first REXT resistor, and the second IC chip is provided with a second REXT resistor.

Preferably, the LED light source module group includes several groups of LED light sources, and the several groups of LED light sources are connected in series.

Preferably, the number of the LED light source module groups is not less than 2.

Preferably, the circuit further comprises a voltage dependent resistor connected in series with the first and second wire winding resistors.

Preferably, the IC chip uses SM2082D control chip.

Compared with the prior art, the utility model has the advantages that;

the IC chip of the utility model is provided with REXT resistor which is set to 5mA-60mA, thus realizing that the output current does not change along with the voltage of OUT port, achieving better constant current performance and greatly improving the stability; furthermore, the utility model discloses system structure is simple, and peripheral component is few, and the scheme is with low costs, and the circuit is simple, and the stable performance is safe.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention;

fig. 2 is a schematic structural diagram of the present invention;

fig. 3 is a schematic structural diagram of the present invention;

fig. 4 is a schematic structural diagram of the present invention;

fig. 5 is a schematic structural diagram of the present invention;

description of the drawings: 1. a first winding resistor; 2. a second winding resistor; 3. a rectifier bridge stack; 4. a voltage dependent resistor; 5. a discharge resistor; 6. an electrolytic capacitor; 7. an LED light source module group; 8. a chip capacitor; 9. a first IC chip; 10. a second IC chip; 11. a first REXT resistor; 12. a second REXT resistance.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

The utility model provides a LED power drive IC control circuit, the circuit includes winding resistance, rectifier bridge heap 3, discharge resistance 5, LED light source module group 7, electrolytic capacitor 6, paster electric capacity 8 and a plurality of IC chip, winding resistance includes first winding resistance 1 and second winding resistance 2, first winding resistance 1 and second winding resistance 2 respectively with rectifier bridge heap 3 is connected, LED light source module group 7 and IC chip respectively with rectifier bridge heap 3 is connected, electrolytic capacitor 6 and paster electric capacity 8 with LED light source module group 7 meets, discharge resistance 5 set up in rectifier bridge heap 3 with between the LED light source module group 7, and with the IC chip meets each other, the IC chip is provided with REXT resistance, REXT resistance sets up to 5mA-60 mA.

It should be mentioned that the IC chip includes a first IC chip 9 and a second IC chip 10, the first IC chip 9 is provided with a first REXT resistor 11, and the second IC chip 10 is provided with a second REXT resistor 12. The LED light source module group 7 includes a plurality of groups of LED light sources, and the plurality of groups of LED light sources are connected in series. The number of the LED light source module groups 7 is not less than 2. The circuit further comprises a piezoresistor 4, and the piezoresistor 4 is connected with the first winding resistor 1 and the second winding resistor 2 in series. The IC chip uses SM2082D control chip.

The utility model discloses output current sets up to 5mA-60mA by REXT resistance, and output current does not change along with chip port voltage variation, realizes better constant current performance, and system simple structure, peripheral components and parts are few, and the scheme is ripe stable. When the inside high temperature of LED lamps and lanterns, can arouse the serious light decay of LED lamp play line, reduce LED life, when the inside junction temperature of IC chip surpasses 110 ℃, the utility model discloses will reduce output current automatically, reduce the inside temperature of lamps and lanterns, ensure the reliability and the stability of this product.

Fig. 2-5 may implement various preferred schemes by multiple sets and different arrangements.

It can be seen from the above implementation that the novel structure of this use is simple, with low costs, the reliability is high, stability is good.

The above description is only the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all the modifications and changes made by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.

Claims

1. An LED power supply driving IC control circuit is characterized by comprising a winding resistor, a rectifier bridge stack (3), a discharge resistor (5), an LED light source module group (7), an electrolytic capacitor (6), a patch capacitor (8) and a plurality of IC chips, wherein the winding resistor comprises a first winding resistor (1) and a second winding resistor (2), the first winding resistor (1) and the second winding resistor (2) are respectively connected with the rectifier bridge stack (3), the LED light source module group (7) and the IC chips are respectively connected with the rectifier bridge stack (3), the electrolytic capacitor (6) and the patch capacitor (8) are connected with the LED light source module group (7) in parallel, the discharge resistor (5) is arranged between the rectifier bridge stack (3) and the LED light source module group (7) and connected with the IC chips in parallel, and the IC chips are provided with REXT resistors, the REXT resistance was set to 5mA-60 mA.

2. The LED power driver IC control circuit according to claim 1, characterized in that the IC chip comprises a first IC chip (9), a second IC chip (10), the first IC chip (9) being provided with a first REXT resistor (11), the second IC chip (10) being provided with a second REXT resistor (12).

3. The LED power driver IC control circuit according to claim 1, wherein the LED light source module group (7) comprises several groups of LED light sources, and the several groups of LED light sources are connected in series.

4. The LED power driving IC control circuit according to claim 1, wherein the number of the LED light source module groups (7) is not less than 2.

5. The LED power driver IC control circuit according to claim 1, characterized in that the circuit further comprises a varistor (4), the varistor (4) being connected in series with the first (1) and second (2) winding resistors.

6. The LED power supply driving IC control circuit according to claim 1, wherein the IC chip uses SM2082D control chip.