A control circuit for implementing 0-10V dimming and multi-step setting

Abstract

The application provides a control circuit for realizing 0-10V dimming and multi-grade setting, applied to the technical field of dimming circuit, comprising a dimming signal input end, a power supply voltage positive end, a power supply voltage negative end, an output voltage end and a control end, which are used for converting the dimming signal into a required voltage signal, wherein the resistance value of the resistance connected to the control end is adjusted to adjust the maximum voltage value of the output voltage to realize multi-grade setting; one end of the resistance R1 connected to the power supply voltage positive end, the other end of the resistance R1 is connected to the resistance R2 and the common end of the dimming signal input end, the other end of the resistance R2 is connected to the parallel resistance R3 and the voltage stabilizing tube Dz1, the other end of the voltage stabilizing tube Dz1 is connected to the power supply voltage negative end; the other end of the resistance R3 is connected to the common end of the voltage stabilizing tube Dz2 and the resistance R4, the other end of the voltage stabilizing tube Dz2 is connected to the control end, the other end of the resistance R4 is connected to the parallel resistance R5 and the resistance R6, the other end of the resistance R6 is connected to the common end of the output voltage end and the capacitor C2, the other end of the resistance R5 and the capacitor C2 is connected to the power supply voltage negative end. On the basis of realizing the 0-10V dimming function, the control end is connected to the voltage stabilizing tube Dz2, the resistance value connected to the control end is adjusted to control the maximum value of the output voltage, and the multi-grade setting function is realized.

Description

Technical Field

[0001] This invention belongs to the field of dimming circuit technology, specifically relating to a control circuit that enables 0-10V dimming and multiple dimming settings. Background Technology

[0002] In the current lighting market, especially in North America, 0-10V dimming control is widely used, and applications that enable multiple power levels in a single lighting product are quite common. The demand for miniaturized power supplies is increasing, while price competition is fierce. These requirements necessitate innovative design of the driver power supply in conjunction with the luminaire, making driver power supply design increasingly challenging. While existing solutions can largely meet the electrical parameter requirements, they often fall short of miniaturization and low-cost optimization.

[0003] like Figure 1 As shown, in the prior art, a dedicated signal conversion chip compatible with the toggle function is usually used to convert the dimming signal and realize the toggle control. The circuit increases the cost of the chip and peripheral circuits, and also increases the space required for PCB wiring, which is not conducive to miniaturization.

[0004] In addition, the signal obtained after conversion by the conversion chip is usually a PWM pulse width modulation signal. This PWM signal needs to be filtered or connected to a chip that can receive PWM signals, which increases the cost and design complexity to some extent. Summary of the Invention

[0005] In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a control circuit that realizes 0-10V dimming and multiple settings. On the basis of realizing the 0-10V dimming function, a control terminal DIP is set to be connected to a Zener diode Dz2. By adjusting the resistance value connected to the control terminal DIP, the maximum value of the output voltage is controlled, thereby realizing the multiple settings function.

[0006] A control circuit for achieving 0-10V dimming and multiple setting levels includes a dimming signal input terminal DIMI, a positive terminal V+ of the power supply voltage, a negative terminal V- of the power supply voltage, a voltage output terminal DIMO, and a control terminal DIP. The control circuit is used to convert the dimming signal input to the circuit via the dimming signal input terminal DIMI into the required voltage signal and output it via the voltage output terminal DIMO. The resistance value connected to the control terminal DIP is adjusted to adjust the maximum voltage value of the output voltage of the voltage output terminal DIMO to achieve multiple setting levels, allowing the control circuit to switch between different levels.

[0007] The positive terminal V+ of the power supply voltage is connected to one end of resistor R1, and the other end of resistor R1 is connected to the common terminal of resistor R2 and dimming signal input terminal DIMI. The other end of resistor R2 is connected to resistor R3 and Zener diode Dz1 in parallel. The other end of Zener diode Dz1 is connected to the negative terminal V- of the power supply voltage.

[0008] The other end of resistor R3 is connected to the common terminal of Zener diode Dz2 and resistor R4. The other end of Zener diode Dz2 is connected to the control terminal DIP. The other end of resistor R4 is connected to resistors R5 and R6 in parallel. The other end of resistor R5 is connected to the negative terminal of the power supply voltage V-. The other end of resistor R6 is connected to the common terminal of voltage output terminal DIMO and capacitor C2. The other end of capacitor C2 is connected to the negative terminal of the power supply voltage V-.

[0009] Preferably, the input voltage range of the dimming signal is 0-10V, and the power supply voltage connected between the positive terminal V+ and the negative terminal V- of the power supply voltage is greater than 10V.

[0010] Preferably, the voltage regulation range of the Zener diode Dz1 is 7.5V to 9.1V.

[0011] Preferably, resistor R1 is used to limit the supply current of the supply voltage, limiting the supply current to below 2mA.

[0012] Preferably, resistors of different resistance values ​​are connected between the control terminal DIP and the negative terminal V- of the power supply voltage to adjust the maximum output voltage value of the DIMO output terminal.

[0013] Preferably, the common terminal of resistors R2 and R3 and Zener diode Dz1 is also connected to capacitor C1, and the other end of capacitor C1 is connected to the negative terminal of the power supply voltage V-.

[0014] The beneficial effects of this invention are as follows: This control circuit, which realizes 0-10V dimming and multiple power levels, limits the supply current of the power supply voltage through resistor R1, limits the external current of the dimming signal through resistor R2, clamps the voltage of the dimming signal through Zener diode Dz1, and uses a voltage divider network to divide the dimming signal, converting it into the required output voltage and outputting it through the voltage output terminal DIMO to achieve the 0-10V dimming function. Furthermore, a control terminal DIP is provided, and the maximum value of the output voltage output through the voltage output terminal DIMO is controlled by adjusting the resistance value of the resistor connected between the control terminal DIP and the negative terminal V- of the power supply voltage, thereby realizing the multiple power level setting function and allowing the circuit to switch between different power levels. Compared with integrated circuit solutions such as SY5867 used in the market, this circuit has a simpler structure, more streamlined design, and uses fewer components, meeting both performance requirements and the requirements of miniaturization and low cost. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a circuit diagram of the prior art involved in this invention;

[0017] Figure 2 This is the circuit diagram of the present invention. Detailed Implementation

[0018] Example 1

[0019] like Figure 2 As shown, a control circuit for achieving 0-10V dimming and multiple setting levels includes a dimming signal input terminal DIMI, a positive terminal V+ of the power supply voltage, a negative terminal V- of the power supply voltage, a voltage output terminal DIMO, and a control terminal DIP. The control circuit converts the dimming signal input from the dimming signal input terminal DIMI into the required voltage signal and outputs it from the voltage output terminal DIMO. Adjusting the resistance value between the control terminal DIP and the negative terminal V- of the power supply voltage adjusts the maximum output voltage value of the voltage output terminal DIMO to achieve multiple setting levels, allowing the control circuit to switch between different levels.

[0020] Specifically, such as Figure 1 As shown, the control circuit includes resistors R1, R2, R3, R4, R5, and R6, capacitors C1 and C2, and Zener diodes Dz1 and Dz2.

[0021] The positive terminal V+ of the power supply voltage is connected to one end of resistor R1, and the other end of resistor R1 is connected to the common terminal of resistor R2 and the dimming signal input terminal DIMI. The input voltage range of the dimming signal is 0-10V. Resistor R1 is used to limit the supply current of the power supply voltage, limiting the supply current to below 2mA, and resistor R2 is used to limit the external current of the dimming signal.

[0022] The other end of resistor R2 is connected in parallel with resistor R3, capacitor C1, and Zener diode Dz1. The other ends of capacitor C1 and Zener diode Dz1 are both connected to the negative terminal V- of the power supply. Zener diode Dz1 is used to set the upper clamping voltage of the dimming signal, limiting the upper limit of the dimming signal and preventing excessive voltage from damaging the circuit. In this embodiment, the Zener diode Dz1 has a voltage regulation range of 7.5V to 9.1V. Capacitor C1 is used to filter out interference in the circuit.

[0023] The other end of resistor R3 is connected to the common terminal of Zener diode Dz2 and resistor R4. The other end of Zener diode Dz2 is connected to the control terminal DIP. The other end of resistor R4 is connected to resistors R5 and R6 in parallel. The other end of resistor R5 is connected to the negative terminal of the power supply voltage V-. The other end of resistor R6 is connected to the common terminal of voltage output terminal DIMO and capacitor C2. The other end of capacitor C2 is connected to the negative terminal of the power supply voltage V-.

[0024] Resistors R3, R4, and R5 form a voltage divider network to divide the input dimming signal to obtain a voltage-divided signal. Resistor R6 and capacitor C2 form a filter network to smooth the output signal and ensure the stability of the output voltage. Voltage regulator Dz2 is used to clamp the output signal, limiting the maximum voltage value of the output signal.

[0025] It should be noted that the supply voltage connected between the positive terminal V+ and the negative terminal V- of the supply voltage is greater than 10V. The Zener diode Dz2 should be selected with a voltage greater than the system's shutdown voltage of 0-10V. For example, if the shutdown point is 0.5V, then a Zener diode with a voltage regulation range of 1V to 5.1V should be selected.

[0026] Working principle: This control circuit realizes 0-10V dimming and multiple setting. When in use, a power supply voltage greater than 10V is connected between the positive terminal V+ and the negative terminal V- of the power supply voltage. The dimming signal input terminal DIMI input voltage range is 0-10V.

[0027] The supply current of the power supply voltage is limited by resistor R1, the external current of the dimming signal is limited by resistor R2, the upper limit of the dimming signal voltage is limited by the clamping effect of Zener diode D1, the dimming signal is divided by a voltage divider network formed by resistors R3, R4 and R5, and the output voltage from the DIMO voltage output terminal is smoothed and filtered by a filter network formed by resistor R6 and capacitor C2 to ensure signal stability. The output voltage is used to control the power and brightness of the lighting equipment.

[0028] Furthermore, by selecting the value of the resistor connected between the control terminal DIP and the negative terminal V- of the power supply voltage, the maximum voltage value of the output voltage of the voltage output terminal DIMO can be controlled to achieve different levels of adjustment, thereby realizing the multi-level setting of the circuit.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control circuit for implementing 0-10V dimming and multi-step setting, characterized in that, The control circuit is used for converting the dimming signal inputted by the dimming signal input end DIMI into a required voltage signal and outputting the voltage signal by the voltage output end DIMO, wherein the resistance value of the resistance connected with the control end DIP is adjusted to adjust the maximum voltage value of the output voltage of the voltage output end DIMO to realize multi-grade setting, and the control circuit is switched between different grades. One end of the resistance R1 is connected with the positive power supply voltage end V+, and the other end of the resistance R1 is connected with the common end of the resistance R2 and the dimming signal input end DIMI. The other end of the resistance R3 is connected with the common end of the resistance R4 and the voltage stabilizing tube Dz2, the other end of the voltage stabilizing tube Dz2 is connected with the control end DIP, the other end of the resistance R4 is connected with the parallel resistance R5 and R6, the other end of the resistance R5 is connected with the negative power supply voltage end V-, and the other end of the resistance R6 is connected with the common end of the voltage output end DIMO and the capacitor C2. The resistance with different resistance values is connected between the control end DIP and the negative power supply voltage end V- to adjust the maximum voltage value of the output voltage outputted by the voltage output end DIMO.

2. The control circuit to achieve 0-10V dimming along with multi-step setting as claimed in claim 1, wherein, The input voltage range of the dimming signal is 0-10V, and the power supply voltage connected between the positive power supply voltage end V+ and the negative power supply voltage end V- is greater than 10V.

3. The control circuit to achieve 0-10V dimming along with multi-step setting as claimed in claim 1, wherein, The voltage stabilizing value of the voltage stabilizing tube Dz1 ranges from 7.5V to 9.1V.

4. The control circuit to achieve 0-10V dimming along with multi-step setting as claimed in claim 1, wherein, The resistance R1 is used for limiting the power supply current of the power supply voltage, and the power supply current is limited below 2mA.

5. The control circuit to achieve 0-10V dimming along with multi-step setting as claimed in claim 1, wherein, The common end of the resistance R2, the resistance R3 and the voltage stabilizing tube Dz1 is further connected with the capacitor C1, and the other end of the capacitor C1 is connected with the negative power supply voltage end V-. The control circuit is used for converting the dimming signal inputted by the dimming signal input end DIMI into a required voltage signal and outputting the voltage signal by the voltage output end DIMO, wherein the resistance value of the resistance connected with the control end DIP is adjusted to adjust the maximum voltage value of the output voltage of the voltage output end DIMO to realize multi-grade setting, and the control circuit is switched between different grades. One end of the resistance R1 is connected with the positive power supply voltage end V+, and the other end of the resistance R1 is connected with the common end of the resistance R2 and the dimming signal input end DIMI. The other end of the resistance R3 is connected with the common end of the resistance R4 and the voltage stabilizing tube Dz2, the other end of the voltage stabilizing tube Dz2 is connected with the control end DIP, the other end of the resistance R4 is connected with the parallel resistance R5 and R6, the other end of the resistance R5 is connected with the negative power supply voltage end V-, and the other end of the resistance R6 is connected with the common end of the voltage output end DIMO and the capacitor C2. The resistance with different resistance values is connected between the control end DIP and the negative power supply voltage end V- to adjust the maximum voltage value of the output voltage outputted by the voltage output end DIMO. The input voltage range of the dimming signal is 0-10V, and the power supply voltage connected between the positive power supply voltage end V+ and the negative power supply voltage end V- is greater than 10V. The voltage stabilizing value of the voltage stabilizing tube Dz1 ranges from 7.5V to 9.1V. The resistance R1 is used for limiting the power supply current of the power supply voltage, and the power supply current is limited below 2mA. The common end of the resistance R2, the resistance R3 and the voltage stabilizing tube Dz1 is further connected with the capacitor C1, and the other end of the capacitor C1 is connected with the negative power supply voltage end V-.

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