Constant-current lamp strip

Abstract

The utility model discloses a constant-current lamp strip, which comprises a control chip U2, a pin 1 of the control chip U2 is connected with a power supply circuit, a pin 2 of the control chip U2 is connected with a power supply loop, and the control chip U2 can output 5V voltage to supply power to a micro-control circuit; a pin 3 of the control chip U2 is connected with the input end of the micro-control circuit, and a pin 4 of the control chip U2 is connected with the output end of the micro-control circuit. According to the utility model, the power supply circuit is connected with the micro-control circuit, the U2 is a linear constant-current chip and is characterized in that 5V power can be output to the micro-control circuit for power supply, and the power supply circuit outputs 5V voltage through the VIN end of the pin 2 of the R4 to the U2 and through the internal constant-voltage source circuit, so that the micro-control of the lamp strip is realized, the control is more linear, the problems of dazzling and stroboflash are effectively avoided, and the use stability of the lamp strip is improved.

Description

Technical Field

[0001] The utility model relates to the field of light strip control circuits, in particular to a constant current light strip. Background Art

[0002] In light strip control, especially in some bathrooms, safety considerations are involved, and low voltage is generally used to power the light strip. At the same time, in order to control the brightness of the light strip, a microcontroller circuit is generally combined with a chip to achieve brightness adjustment of the light strip. However, the existing constant current control circuit is relatively complex and has a high production cost. Utility Model Content

[0003] The main purpose of the utility model is to propose a constant current light strip, aiming to improve the control circuit of the light strip and thus realize the constant current output of the light strip, ensure the stepless dimming of the light strip, avoid the problem of glare, improve the comfort of the light strip, reduce flicker and improve the photo-taking effect of the bathroom mirror.

[0004] To achieve the above purpose, the utility model provides a constant current light strip, comprising:

[0005] Control chip U2, pin 1 of the control chip U2 is connected to the power supply circuit, pin 2 of the control chip U2 is connected to the power supply loop, the power supply circuit is provided with an LED lamp, and the control chip U2 can output a 5V voltage to power the microcontroller circuit;

[0006] The pin 3 of the control chip U2 is connected to the input end of the micro-control circuit, and the pin 4 of the control chip U2 is connected to the output end of the micro-control circuit.

[0007] U2 is a linear constant current chip, which is characterized by being able to output 5V electricity to power the micro-control circuit. The power supply circuit is through R4 to the VIN terminal of U2's pin 2, and outputs 5V voltage through the internal constant voltage source circuit, thereby realizing micro-control of the light strip, and its control is more linear, effectively avoiding the problems of glare and flicker, and improving the stability of the light strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is the circuit diagram of the utility model.

[0009] In the figure, 101 is the first branch, and 102 is the second branch. DETAILED DESCRIPTION

[0010] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0011] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0012] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the utility model, the descriptions of "first" or "second" etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0013] like Figure 1 As shown, a constant current light strip comprises:

[0014] Control chip U2, pin 1 of the control chip U2 is connected to the power supply circuit, pin 2 of the control chip U2 is connected to the power supply loop, the power supply circuit is provided with an LED lamp, and the control chip U2 can output a 5V voltage to power the microcontroller circuit;

[0015] The pin 3 of the control chip U2 is connected to the input end of the micro-control circuit, and the pin 4 of the control chip U2 is connected to the output end of the micro-control circuit.

[0016] U2 is a linear constant current chip, which is characterized by being able to output 5V electricity to power the micro-control circuit. The power supply circuit is through R4 to the VIN terminal of U2's pin 2, and outputs 5V voltage through the internal constant voltage source circuit, thereby realizing micro-control of the light strip, and its control is more linear, effectively avoiding the problems of glare and flicker, and improving the stability of the light strip.

[0017] Specifically, the pin 2 is an input pin, thereby realizing a power supply circuit.

[0018] In the embodiment of the utility model, the micro-control circuit is a sound wave controller, a microwave controller and a light wave controller, thereby realizing the brightness change of the light strip controlled by a small voltage.

[0019] Specifically, the control chip U2 is provided with a ground pin, and the ground pin is connected to the pin 6 through a first branch, and the first branch is provided with a resistor RS2.

[0020] In the embodiment of the utility model, the first branch is connected to the pin 7 through the second branch, and the second branch is provided with a ground terminal. Through the setting of the pins 6 and 7, the voltage is stabilized at 5V, avoiding damage to the microcontroller circuit caused by high voltage.

[0021] Specifically, the pin 4 is a brightness control PWM pulse width modulation current signal, and the pin 3 is a PW power supply, which further converts the electrical signal into a control signal.

[0022] In the embodiment of the utility model, the control chip U2 is IC--H7250, which is packaged in ESOP8. H7250 is an LED linear constant current control chip that can realize the first stage of light mixing and is compatible with three-stage brightness adjustment functions, and is applicable to 4-46V.

[0023] Because linear ICs have fewer peripheral components, they are used by many customers in circuits with small current and low voltage difference, which can save a lot of components, so cost control is effective. They support PWM dimming and linear dimming.

[0024] Of course, some existing chips can also be used to achieve linear dimming.

[0025] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A constant current light strip, characterized in that: include: The control chip U2, the pin 1 of the control chip U2 is connected to the power supply circuit, the power supply circuit is provided with an LED lamp, the pin 2 of the control chip U2 is connected to the power supply loop, and the control chip U2 can output a 5V voltage to power the micro control circuit; The pin 3 of the control chip U2 is connected to the input end of the micro-control circuit, and the pin 4 of the control chip U2 is connected to the output end of the micro-control circuit.

2. The constant current light strip according to claim 1, characterized in that: The pin 2 is an input pin.

3. The constant current light strip according to claim 1, characterized in that: The micro-control circuit is an acoustic wave controller, a microwave controller and a light wave controller.

4. The constant current light strip according to claim 1, characterized in that: The control chip U2 is provided with a ground pin, and the ground pin is connected to the pin 6 through a first branch, and the first branch is provided with a resistor RS2.

5. The constant current light strip according to claim 4, characterized in that: The first branch is connected to the pin 7 via a second branch, and the second branch is provided with a ground terminal.

6. The constant current light strip according to claim 1, characterized in that: The pin 4 is the brightness control PWM pulse width modulation current signal, and the pin 3 is the PW power supply.

7. The constant current light strip according to claim 1, characterized in that: The model of the control chip U2 is IC--H7250, which adopts ESOP8 packaging.

Images