Low-voltage constant-current plant illumination soft lamp strip

Abstract

The utility model provides a low-voltage constant-current plant lighting soft lamp strip, which is characterized by comprising a plant lighting subunit, the plant lighting subunit comprises a lamp string, a Zener diode Zener, a power supply capacitor C1, a power supply resistor RV, a sampling resistor Rext and a constant-current chip U1, a pin 2 of the constant-current chip U1 is grounded, a pin 3 of the constant-current chip U1 is grounded, and a pin 4 of the constant-current chip U1 is grounded. A pin 3 of the constant-current chip U1 is connected with one end of the sampling resistor Rext, the other end of the sampling resistor Rext is grounded, a pin 6 of the constant-current chip U1 is connected with one end of the power supply resistor RV, the other end of the power supply resistor RV is connected with an anode of the lamp string, a cathode of the lamp string is connected with a pin 4 of the constant-current chip U1, and a pin 5 of the constant-current chip U1 is connected with a pin 6 of the sampling resistor Rext. And the anode of the Zener diode Zener is grounded. The low-voltage constant-current plant lighting soft lamp strip has the advantages of having an over-temperature protection function and being long in service life.

Description

Technical Field

[0001] The utility model relates to a lighting device, in particular to a low-voltage constant-current plant lighting soft light belt. Background Art

[0002] Plant lights, as the name implies, are lamps used for plants. Plant lights simulate the principle that plants need sunlight for photosynthesis, supplementing the light for plants or completely replacing sunlight.

[0003] Existing plant lamps lack over-temperature protection function and have a short service life. Summary of the invention

[0004] In order to solve the problems in the prior art, the utility model provides a low-voltage constant-current plant lighting soft light strip.

[0005] The utility model provides a low-voltage constant-current plant lighting soft light strip, comprising a plant lighting sub-unit, wherein the plant lighting sub-unit comprises a light string, a voltage-stabilizing diode Zener, a power supply capacitor C1, a power supply resistor RV, a sampling resistor Rext and a constant current chip U1, wherein a pin 2 of the constant current chip U1 is grounded, a pin 3 of the constant current chip U1 is connected to one end of the sampling resistor Rext, the other end of the sampling resistor Rext is grounded, a pin 6 of the constant current chip U1 is connected to one end of the power supply resistor RV, the other end of the power supply resistor RV is connected to the anode of the light string, the cathode of the light string is connected to a pin 4 of the constant current chip U1, the anode of the voltage-stabilizing diode Zener is grounded, the cathode of the voltage-stabilizing diode Zener is connected to a pin 6 of the constant current chip U1, the anode of the light string is connected to the power supply voltage, one end of the power supply capacitor C1 is grounded, and the other end of the power supply capacitor C1 is connected to the power supply voltage.

[0006] As a further improvement of the utility model, the light string includes white light LEDs and red light LEDs connected in series, and the white light LEDs and red light LEDs are arranged in white-red-white-white-red-white-red-white.

[0007] As a further improvement of the present utility model, there are at least two plant lighting sub-units.

[0008] The beneficial effect of the utility model is that through the above scheme, a low-voltage constant-current plant lighting soft light strip is provided, which has an over-temperature protection function and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other solutions can be obtained based on these drawings without paying creative work.

[0010] Figure 1 The utility model discloses a circuit diagram of a low-voltage constant-current plant lighting soft light strip. DETAILED DESCRIPTION

[0011] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0012] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0013] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0014] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0015] like Figure 1As shown, a low-voltage constant-current plant lighting soft light strip includes a plant lighting sub-unit, wherein the plant lighting sub-unit includes a light string, a voltage-stabilizing diode Zener, a power supply capacitor C1, a power supply resistor RV, a sampling resistor Rext and a constant current chip U1, wherein pin 2 of the constant current chip U1 is grounded, pin 3 of the constant current chip U1 is connected to one end of the sampling resistor Rext, the other end of the sampling resistor Rext is grounded, pin 6 of the constant current chip U1 is connected to one end of the power supply resistor RV, the other end of the power supply resistor RV is connected to the anode of the light string, the cathode of the light string is connected to pin 4 of the constant current chip U1, the anode of the voltage-stabilizing diode Zener is grounded, the cathode of the voltage-stabilizing diode Zener is connected to pin 6 of the constant current chip U1, the anode of the light string is connected to the power supply voltage, one end of the power supply capacitor C1 is grounded, and the other end of the power supply capacitor C1 is connected to the power supply voltage.

[0016] The light string includes white light LEDs and red light LEDs connected in series, and the white light LEDs and red light LEDs are arranged in white-red-white-white-red-white-red-white. Figure 1 Among them, W1, W12, W3, W4 and W5 are white light LEDs, while RED1, RED2 and RED3 are red light LEDs.

[0017] There are at least two plant lighting sub-units. Figure 1 S1 in the figure is the first string of lights, and Sn is the nth string of lights.

[0018] White light LED parameters: display index Ra80+, voltage VF: 2.6-2.8V, color temperature Tc: 4000K, brightness 34.5-40.5Lm, color tolerance SDCM<3.

[0019] Red light LED parameters: voltage VF: 2.0-2.2V, center wavelength λcentroid: 646-666nm.

[0020] The constant current chip U1 is preferably NU502, which is a simple small / medium power constant current component that is very easy to use in various LED lighting products. It has excellent load and power modulation rate and very small current output error. It can make the LED current very stable. Even if the power supply and load change range is large, it can keep the LED brightness uniform and increase the LED service life.

[0021] The power supply capacitor C1 uses 0805 / 1uF 50V; plus a power supply resistor RV and a sampling resistor Rext.

[0022] Zener diode Zener diode uses 5.1V Zener diode, which can effectively protect the life of constant current chip U1.

[0023] The constant current chip U1 also has an over-temperature protection function: when the chip temperature is between T0 and T1, the current will drop by 0.8% for every 10°C increase. When the chip junction temperature is higher than T1, the output current of NU502 will drop by about 28% for every 10°C increase, and the current output will begin to decrease to reduce the chip power. When the chip junction temperature continues to rise to T2, the output current will be almost turned off. When the temperature begins to drop, U1 will slowly resume normal current output in the same way.

[0024] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A low voltage constant current plant lighting soft light strip, characterized by: The plant lighting subunit includes a light string, a voltage-stabilizing diode Zener, a power supply capacitor C1, a power supply resistor RV, a sampling resistor Rext and a constant current chip U1, wherein pin 2 of the constant current chip U1 is grounded, pin 3 of the constant current chip U1 is connected to one end of the sampling resistor Rext, the other end of the sampling resistor Rext is grounded, pin 6 of the constant current chip U1 is connected to one end of the power supply resistor RV, the other end of the power supply resistor RV is connected to the anode of the light string, the cathode of the light string is connected to pin 4 of the constant current chip U1, the anode of the voltage-stabilizing diode Zener is grounded, the cathode of the voltage-stabilizing diode Zener is connected to pin 6 of the constant current chip U1, the anode of the light string is connected to the power supply voltage, one end of the power supply capacitor C1 is grounded, and the other end of the power supply capacitor C1 is connected to the power supply voltage.

2. The low-voltage constant-current plant lighting soft light strip according to claim 1 is characterized in that: The light string includes a white light LED and a red light LED connected in series, and the white light LED and the red light LED are arranged in white-red-white-white-red-white-red-white.

3. The low-voltage constant-current plant lighting soft light strip according to claim 1 is characterized in that: There are at least two plant lighting sub-units.

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