Intelligent dimming LED power supply

Abstract

The utility model relates to an intelligent dimming LED power supply. The intelligent dimming LED power supply comprises a power factor correction booster circuit, a half-bridge constant voltage circuit, a Buck voltage reduction constant current circuit, an auxiliary power supply output circuit, a single-chip microcomputer and an LED module. The single-chip microcomputer is connected with a USB programming interface, an NTC temperature detection circuit, an NFC current adjusting circuit and a dimming interface. The USB programming interface is connected with the single-chip microcomputer and used for adjusting output current to achieve constant lumen. The NTC temperature detection circuit is connected with the single chip microcomputer and is used for detecting the temperature of the LED power supply so as to protect the LED module; the NFC current adjusting circuit is connected with the single chip microcomputer and is used for realizing remote wireless dimming; the dimming interface is connected with the single-chip microcomputer and used for achieving wired dimming. According to the utility model, different types of dimming can be realized through the NFC and the dimming interface, the USB programming interface is arranged to adjust the output current so as to realize constant lumen, and the NTC temperature detection circuit is arranged to protect the LED module, so that the energy consumption is effectively reduced, the service life of the LED is prolonged, and the purposes of energy conservation and environmental protection are realized.

Description

Technical Field

[0001] The utility model discloses a dimming LED power supply, belongs to the technical field of LED power supplies, and specifically relates to an intelligent dimming LED power supply. Background Art

[0002] Smart dimming LED power supply is a power supply device that can adjust the brightness of LED lights as needed. It realizes dimming function by controlling the current or voltage of LED to meet the lighting needs in different scenarios. Smart dimming LED power supply usually has the following characteristics:

[0003] Wide dimming range: The light can be adjusted continuously as needed, from completely off to any brightness between maximum brightness.

[0004] Various dimming methods: Dimming operations can be performed through physical switches, remote controls, mobile phone APPs, etc., which is convenient for users to use and control.

[0005] Strong compatibility: Smart dimming LED drivers usually support use with a variety of LED lamps and can adapt to LED products of different types and specifications.

[0006] In general, intelligent dimming LED power supply has broad application prospects in the field of lighting and can provide users with a more comfortable and convenient lighting experience.

[0007] However, the dimming LED power supply in the prior art will increase its power consumption because it needs to adjust the brightness of the LED, and the adjustment of the brightness will cause the temperature to rise. When the temperature is too high, the service life of the LED will be reduced. Utility Model Content

[0008] Purpose of the utility model: to provide an intelligent dimming LED power supply to solve the above-mentioned problems.

[0009] Technical solution: An intelligent dimming LED power supply, the LED power supply comprising: a power factor correction boost circuit, a half-bridge constant voltage circuit, a Buck step-down constant current circuit, an auxiliary power output circuit, a single-chip microcomputer and an LED module;

[0010] The single chip microcomputer is connected to a USB programming interface, an NTC temperature detection circuit, an NFC current regulation circuit and a dimming interface;

[0011] The USB programming interface is connected to the single chip microcomputer and is used to adjust the output current to achieve constant lumen;

[0012] The NTC temperature detection circuit is connected to the single chip microcomputer and is used for temperature detection of the LED power supply to protect the LED module;

[0013] The NFC current regulation circuit is connected to the single chip microcomputer to realize remote wireless dimming;

[0014] The dimming interface is connected to the single chip microcomputer and is used to realize wired dimming.

[0015] In a further embodiment, the input end of the power factor correction boost circuit is connected to the power supply, and the output end is connected to the input end of the half-bridge constant voltage circuit, the output end of the half-bridge constant voltage circuit is connected to the input end of the Buck step-down constant current circuit, the output end of the Buck step-down constant current circuit is connected to the single-chip microcomputer, the input end of the auxiliary power supply output circuit is connected to the single-chip microcomputer, and the LED module is connected to the single-chip microcomputer.

[0016] In a further embodiment, the auxiliary power output circuit outputs a 12V voltage.

[0017] In a further embodiment, the NTC temperature detection circuit includes: a thermistor RT1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C1, a capacitor C2, an operational amplifier U1A and a voltage regulator D1;

[0018] One end of the thermistor RT1 is connected to one end of the resistor R1, and the other end is connected to one end of the resistor R3. One end of the resistor R5 is simultaneously connected to the other end of the resistor R1, one end of the resistor R2 and one end of the capacitor C1, and the other end of the resistor R2 is grounded. One end of the resistor R6 is simultaneously connected to the other end of the resistor R3, one end of the resistor R4 and the other end of the capacitor C1, and the other end of the resistor R4 is grounded. The non-inverting input end of the operational amplifier U1A is simultaneously connected to the other end of the resistor R5 and one end of the resistor R8, and the other end of the resistor R8 is grounded. The inverting input end of the operational amplifier U1A is simultaneously connected to the other end of the resistor R6 and one end of the resistor R7. The output end of the operational amplifier U1A is simultaneously connected to the other end of the resistor R7, one end of the capacitor C2 and the negative electrode of the voltage regulator D1 and connected to the single-chip computer. The other end of the capacitor C2 is grounded, and the positive electrode of the voltage regulator D1 is grounded.

[0019] In a further embodiment, the NFC current regulation circuit is composed of an NFC chip and a coil, the single-chip microcomputer and the coil are electrically connected to the NFC chip, the NFC current regulation circuit performs NFC communication with the single-chip microcomputer by setting the NFC chip and the coil, and stores parameter setting information through the NFC chip, the single-chip microcomputer reads the parameter setting information stored in the NFC current regulation circuit, and controls and adjusts the output dimming signal according to the parameter setting information.

[0020] Beneficial effects: The utility model discloses a dimming LED power supply, which belongs to the technical field of LED power supplies, and specifically relates to an intelligent dimming LED power supply, comprising: a power factor correction boost circuit, a half-bridge constant voltage circuit, a Buck step-down constant current circuit, an auxiliary power supply output circuit, a single-chip microcomputer and an LED module; the single-chip microcomputer is connected with a USB programming interface, an NTC temperature detection circuit, an NFC current regulation circuit and a dimming interface; the USB programming interface is connected to the single-chip microcomputer for adjusting the output current to achieve constant lumen; the NTC temperature detection circuit is connected to the single-chip microcomputer for temperature detection of the LED power supply to protect the LED module; the NFC current regulation circuit is connected to the single-chip microcomputer for remote wireless dimming; the dimming interface is connected to the single-chip microcomputer for wired dimming; the utility model can achieve different types of dimming through NFC and the dimming interface, and at the same time, a USB programming interface is set to adjust the output current to achieve constant lumen. In addition, the NTC temperature detection circuit is set to protect the LED module, so that the utility model effectively reduces energy consumption and extends the service life of the LED, thereby achieving the goals of energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 It is a schematic diagram of the NTC temperature detection circuit of the utility model. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present utility model, 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] An intelligent dimming LED power supply, comprising: a power factor correction boost circuit, a half-bridge constant voltage circuit, a Buck step-down constant current circuit, an auxiliary power output circuit, a single chip microcomputer and an LED module;

[0027] In one embodiment, Figure 1 As shown, the single chip microcomputer is connected to a USB programming interface, an NTC temperature detection circuit, an NFC current regulation circuit and a dimming interface;

[0028] The USB programming interface is connected to the single chip microcomputer and is used to adjust the output current to achieve constant lumen;

[0029] The NTC temperature detection circuit is connected to the single chip microcomputer and is used for temperature detection of the LED power supply to protect the LED module;

[0030] The NFC current regulation circuit is connected to the single chip microcomputer to realize remote wireless dimming;

[0031] The dimming interface is connected to the single chip microcomputer and is used to realize wired dimming.

[0032] In one embodiment, Figure 1 As shown, the input end of the power factor correction boost circuit is connected to the power supply, and the output end is connected to the input end of the half-bridge constant voltage circuit, the output end of the half-bridge constant voltage circuit is connected to the input end of the Buck step-down constant current circuit, the output end of the Buck step-down constant current circuit is connected to the single-chip microcomputer, the input end of the auxiliary power supply output circuit is connected to the single-chip microcomputer, and the LED module is connected to the single-chip microcomputer.

[0033] In one embodiment, Figure 1 As shown, the auxiliary power supply output circuit outputs a 12V voltage.

[0034] In one embodiment, Figure 2As shown, the NTC temperature detection circuit includes: a thermistor RT1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C1, a capacitor C2, an operational amplifier U1A and a voltage regulator D1;

[0035] One end of the thermistor RT1 is connected to one end of the resistor R1, and the other end is connected to one end of the resistor R3. One end of the resistor R5 is simultaneously connected to the other end of the resistor R1, one end of the resistor R2 and one end of the capacitor C1, and the other end of the resistor R2 is grounded. One end of the resistor R6 is simultaneously connected to the other end of the resistor R3, one end of the resistor R4 and the other end of the capacitor C1, and the other end of the resistor R4 is grounded. The non-inverting input end of the operational amplifier U1A is simultaneously connected to the other end of the resistor R5 and one end of the resistor R8, and the other end of the resistor R8 is grounded. The inverting input end of the operational amplifier U1A is simultaneously connected to the other end of the resistor R6 and one end of the resistor R7. The output end of the operational amplifier U1A is simultaneously connected to the other end of the resistor R7, one end of the capacitor C2 and the negative electrode of the voltage regulator D1 and connected to the single-chip computer. The other end of the capacitor C2 is grounded, and the positive electrode of the voltage regulator D1 is grounded.

[0036] In one embodiment, the NFC current regulation circuit is composed of an NFC chip and a coil, and the single-chip microcomputer and the coil are electrically connected to the NFC chip. The NFC current regulation circuit performs NFC communication with the single-chip microcomputer by setting the NFC chip and the coil, and stores parameter setting information through the NFC chip. The single-chip microcomputer reads the parameter setting information stored in the NFC current regulation circuit, and controls and adjusts the output dimming signal according to the parameter setting information.

[0037] Working principle: When the utility model is working, it is powered on first, and the power supply is connected to the power factor correction boost circuit through the power factor correction boost circuit to improve the power factor of the load device, and it is connected to the power grid. The boost converter is used to adjust the output current according to the current waveform and voltage waveform of the load device, thereby improving the power factor, and then the output voltage is output to the half-bridge constant voltage circuit to achieve the regulation function of the constant output voltage. It consists of two power switches (MOSFET or IGBT, etc.) and a corresponding drive circuit. In the half-bridge constant voltage circuit, the input power supply and the output load are connected respectively through two power switches. One of the power switches is a high-side switch, and the other is a low-side switch. By switching these two switches at the right time, the size of the output voltage can be controlled, thereby achieving the regulation of the constant output voltage.

[0038] The output voltage is then sent to the Buck step-down constant current circuit to provide a stable current output for the load. In the Buck constant current circuit, the output voltage and current are adjusted by controlling the on-time of the switch tube. The Buck step-down constant current circuit consists of a power MOSFET switch tube, an inductor, a diode and an output capacitor. When the input voltage is applied to the circuit, the switch tube switches periodically, allowing the inductor to store energy and provide current to the load. Controlling the on-time of the switch tube can achieve precise adjustment of the output voltage and current, and then the output voltage assists the power supply output circuit and LED module;

[0039] In addition, the single chip microcomputer performs protection and dimming operations according to the USB programming interface, NTC temperature detection circuit, NFC current regulation circuit and dimming interface. Changes in the thermistor RT1 in the NTC temperature detection circuit will cause changes in the voltage across the capacitor C1. The higher the temperature, the smaller the resistance of the thermistor RT1, the higher the voltage of the resistor R4, and the smaller the voltage difference across the capacitor C1, and vice versa. Therefore, different voltages are output to the single chip microcomputer according to the temperature value of the thermistor RT1, and the single chip microcomputer adjusts the voltage output to the LED module according to the voltage value.

[0040] At the same time, the USB programming interface is connected to the microcontroller to adjust the output current to achieve constant lumen; the NTC temperature detection circuit is connected to the microcontroller to detect the temperature of the LED power supply to protect the LED module; the dimming interface is connected to the microcontroller to achieve wired dimming.

[0041] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. An intelligent dimming LED power supply, characterized in that: The LED power supply includes: a power factor correction boost circuit, a half-bridge constant voltage circuit, a Buck step-down constant current circuit, an auxiliary power output circuit, a single-chip microcomputer and an LED module; The single chip microcomputer is connected to a USB programming interface, an NTC temperature detection circuit, an NFC current regulation circuit and a dimming interface; The USB programming interface is connected to the single chip microcomputer and is used to adjust the output current to achieve constant lumen; The NTC temperature detection circuit is connected to the single chip microcomputer and is used for temperature detection of the LED power supply to protect the LED module; The NFC current regulation circuit is connected to the single chip microcomputer to realize remote wireless dimming; The dimming interface is connected to the single chip microcomputer and is used to realize wired dimming.

2. According to claim 1, the intelligent dimming LED power supply is characterized in that: The input end of the power factor correction boost circuit is connected to the power supply, and the output end is connected to the input end of the half-bridge constant voltage circuit. The output end of the half-bridge constant voltage circuit is connected to the input end of the Buck step-down constant current circuit. The output end of the Buck step-down constant current circuit is connected to the single-chip microcomputer. The input end of the auxiliary power supply output circuit is connected to the single-chip microcomputer, and the LED module is connected to the single-chip microcomputer.

3. According to claim 1, the intelligent dimming LED power supply is characterized in that: The auxiliary power output circuit outputs a 12V voltage.

4. According to claim 1, the intelligent dimming LED power supply is characterized in that: The NTC temperature detection circuit includes: a thermistor RT1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a capacitor C1, a capacitor C2, an operational amplifier U1A and a voltage regulator tube D1; One end of the thermistor RT1 is connected to one end of the resistor R1, and the other end is connected to one end of the resistor R3. One end of the resistor R5 is simultaneously connected to the other end of the resistor R1, one end of the resistor R2 and one end of the capacitor C1, and the other end of the resistor R2 is grounded. One end of the resistor R6 is simultaneously connected to the other end of the resistor R3, one end of the resistor R4 and the other end of the capacitor C1, and the other end of the resistor R4 is grounded. The non-inverting input end of the operational amplifier U1A is simultaneously connected to the other end of the resistor R5 and one end of the resistor R8, and the other end of the resistor R8 is grounded. The inverting input end of the operational amplifier U1A is simultaneously connected to the other end of the resistor R6 and one end of the resistor R7. The output end of the operational amplifier U1A is simultaneously connected to the other end of the resistor R7, one end of the capacitor C2 and the negative electrode of the voltage regulator D1 and connected to the single-chip computer. The other end of the capacitor C2 is grounded, and the positive electrode of the voltage regulator D1 is grounded.

5. According to claim 1, the intelligent dimming LED power supply is characterized in that: The NFC current regulation circuit is composed of an NFC chip and a coil. The single-chip microcomputer and the coil are electrically connected to the NFC chip. The NFC current regulation circuit performs NFC communication with the single-chip microcomputer by setting the NFC chip and the coil, and stores parameter setting information through the NFC chip. The single-chip microcomputer reads the parameter setting information stored in the NFC current regulation circuit, and controls and adjusts the output dimming signal according to the parameter setting information.

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