A multi-channel, multi-voltage adaptive energy-saving circuit for lighting control

Abstract

This utility model discloses a multi-channel, multi-voltage adaptive energy-saving circuit for lighting control, relating to the field of lighting control. The multi-channel, multi-voltage adaptive energy-saving circuit for lighting control includes: a power input port circuit for introducing external power, converting it into a working voltage VIN, and outputting it to the control section power supply circuit and a high-power step-down constant current constant voltage circuit; and a control section power supply circuit for converting the working voltage VIN into a first voltage for the controller to operate. Compared with the prior art, the advantages of this utility model are: the multi-channel, multi-voltage combination of this utility model can meet the needs of various lighting combinations with different voltage requirements; after adding a lighting switch control circuit to the positive terminal of the lighting power supply, it effectively solves the energy waste problem caused by the large static current of traditional lighting fixtures in the off state; and with multiple voltage outputs, controller manufacturers do not need to customize a large number of different versions of controllers for each customer with different voltage requirements.

Description

Technical Field

[0001] This utility model relates to the field of lighting control, specifically a multi-channel, multi-voltage adaptive energy-saving circuit for lighting control. Background Technology

[0002] In controller + LED light strip (light fixture) applications, there are often many different input and output voltage requirements. When the controller can control multiple groups of lights, each group of lights may require different voltages. Therefore, controller manufacturers have to customize products according to different customer needs, resulting in many production versions that require improvement. Utility Model Content

[0003] The purpose of this invention is to provide a multi-channel, multi-voltage adaptive energy-saving circuit for lighting control, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A multi-channel, multi-voltage adaptive energy-saving circuit for lighting control includes: The power input port circuit is used to introduce an external power supply (e.g., DC5-24V), convert it into the working voltage VIN, and output it to the power supply circuit of the control section and the high-power step-down constant current constant voltage circuit. The power supply circuit of the control section is used to convert the working voltage VIN into a first voltage (3.3V) for the controller to operate; A high-power step-down constant current constant voltage circuit is used to convert the working voltage VIN into a second voltage (5V / 3A) to power the lamps through the lamp switch control circuit. The lighting switch control circuit is used to receive control from the controller and use a second voltage or external power supply to power the lighting fixture. The output of the power input port circuit is connected to the input of the power supply circuit of the control section and the input of the high-power step-down constant current and constant voltage circuit. The output of the power supply circuit of the control section is connected to the first input of the lighting switch control circuit, and the output of the high-power step-down constant current and constant voltage circuit is connected to the second input of the lighting switch control circuit.

[0005] As a further embodiment of this utility model: the power input port circuit includes an interface INPUT1, the second end of the interface INPUT1 is grounded, the first end of the interface INPUT1 is connected to the positive terminal of the diode D1, the negative terminal of the diode D1 is connected to one end of the capacitor C1, one end of the capacitor C2, the input terminal of the power supply circuit of the control part, and the input terminal of the high-power step-down constant current constant voltage circuit, the other end of the capacitor C1 is grounded, and the other end of the capacitor C2 is grounded.

[0006] As a further improvement of this utility model: the power supply circuit of the control part includes chip U1, the model of chip U1 is HT7533, pin 1 of chip U1 is grounded, pin 2 of chip U1 is connected to the output terminal of the power input port circuit, pin 3 of chip U1 is connected to one end of capacitor C3, one end of capacitor C4, and the first input terminal of the lamp switch control circuit, the other end of capacitor C3 is grounded, and the other end of capacitor C4 is grounded.

[0007] As a further embodiment of this utility model: the high-power step-down constant current constant voltage circuit includes chip U2, the model of chip U2 is CX8525. Pin 4 of chip U2 is connected to the output terminal of the power input port circuit. Pin 6 of chip U2 is connected to pin 5 of chip U2, one end of resistor R14, and one end of inductor L1. The other end of resistor R14 is grounded through capacitor C10. The other end of inductor L1 is connected to one end of resistor R10, one end of resistor R13, and pin 3 of chip U2. The other end of resistor R10 is connected to the other end of resistor R13, one end of resistor R11, pin 2 of chip U2, one end of capacitor C6, one end of capacitor C7, one end of capacitor C8, and the second input terminal of the lamp switch control circuit. The other end of capacitor C6, the other end of capacitor C7, and the other end of capacitor C8 are grounded. The other end of resistor R11 is connected to one end of resistor R15, one end of capacitor C9, and pin 1 of chip U2. The other end of resistor R15 and the other end of capacitor C9 are grounded.

[0008] As a further embodiment of this utility model: the lamp switch control circuit includes a MOSFET M1. The source (S) of MOSFET M1 is connected to one end of resistor R1, one end of resistor R2, one end of resistor R3, and the negative terminal of Zener diode D2. The other end of resistor R1 is connected to a second voltage through a switch controlled by the controller. The other end of resistor R2 is connected to an external power supply through another switch controlled by the controller. The gate (G) of MOSFET M1 is connected to the other end of resistor R3, the positive terminal of Zener diode D2, and one end of resistor R4. The drain (D) of MOSFET M1 is connected to the first terminal of lamp interface OUTPUT1. The second terminal of lamp interface OUTPUT1 is connected to the controller. The third terminal of lamp interface OUTPUT1 is grounded. Lamp is connected to external lamps through lamp interface OUTPUT1. The other end of resistor R4 is connected to the collector of transistor Q1. The emitter of transistor Q1 is grounded. The base of transistor Q1 is connected to the controller through resistor R5.

[0009] Compared with the prior art, the beneficial effects of this utility model are: the multi-channel and multi-voltage combination of this utility model can meet the needs of various lamp combinations with different voltage requirements. Whether it is different voltages of different groups of lamps or the diverse requirements of input and output voltage, it can be easily handled. At the same time, the wide voltage support characteristics of the control switch circuit enable the whole system to work stably in various power supply environments. By adding a lamp switch control circuit to the positive terminal of the lamp power supply, the problem of energy waste caused by the large static current of traditional lamps when they are off is effectively solved. Especially in battery-powered applications, such as automotive ambient lighting, it can significantly extend battery life, which is in line with the development trend of energy conservation and environmental protection. With multiple voltage outputs, controller manufacturers do not need to customize a large number of different versions of controllers for each customer with different voltage requirements. The main control function circuits can remain consistent, and only the power conversion and lighting control switch circuits need to be adjusted appropriately, which greatly reduces the number of production versions, lowers production costs, and reduces the difficulty of production management. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a multi-channel, multi-voltage adaptive energy-saving circuit for lighting control.

[0011] Figure 2 This is a circuit diagram of a multi-channel, multi-voltage adaptive energy-saving circuit for lighting control. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0013] Please see Figure 1 A multi-channel, multi-voltage adaptive energy-saving circuit for lighting control, comprising: The power input port circuit is used to introduce an external power supply (e.g., DC5-24V), convert it into the working voltage VIN, and output it to the power supply circuit of the control section and the high-power step-down constant current constant voltage circuit. The power supply circuit of the control section is used to convert the working voltage VIN into a first voltage (3.3V) for the controller to operate; A high-power step-down constant current constant voltage circuit is used to convert the working voltage VIN into a second voltage (5V / 3A) to power the lamps through the lamp switch control circuit. The lighting switch control circuit is used to receive control from the controller and use a second voltage or external power supply to power the lighting fixture. The output of the power input port circuit is connected to the input of the power supply circuit of the control section and the input of the high-power step-down constant current and constant voltage circuit. The output of the power supply circuit of the control section is connected to the first input of the lighting switch control circuit, and the output of the high-power step-down constant current and constant voltage circuit is connected to the second input of the lighting switch control circuit.

[0014] In this embodiment: Please refer to Figure 2 The power input port circuit includes interface INPUT1. The second terminal of interface INPUT1 is grounded. The first terminal of interface INPUT1 is connected to the positive terminal of diode D1. The negative terminal of diode D1 is connected to one end of capacitor C1, one end of capacitor C2, the input terminal of the power supply circuit of the control section, and the input terminal of the high-power step-down constant current constant voltage circuit. The other end of capacitor C1 is grounded, and the other end of capacitor C2 is grounded.

[0015] An external power source (which can be a power adapter of approximately 12V or 24V, and the total power of the external adapter must be greater than the maximum power of the connected LED strip) is introduced through the INPUT1 interface to serve as the power supply.

[0016] In this embodiment: Please refer to Figure 2 The power supply circuit of the control section includes chip U1, model number HT7533. Pin 1 of chip U1 is grounded, pin 2 of chip U1 is connected to the output terminal of the power input port circuit, and pin 3 of chip U1 is connected to one end of capacitor C3, one end of capacitor C4, and the first input terminal of the lamp switch control circuit. The other end of capacitor C3 is grounded, and the other end of capacitor C4 is grounded.

[0017] Chip U1 converts the working voltage VIN into a first voltage (3.3V), which serves as the working voltage for the controller (MCU). The MCU has two main functions: 1. To provide lighting data to the RGB lights, enabling them to run various lighting effects (such as rainbow and marquee effects); 2. To control the power supply of each group of lights. MCU control of switches and light operation status is a common technology and will not be elaborated here.

[0018] In this embodiment: Please refer to Figure 2 The high-power step-down constant current constant voltage circuit includes chip U2, model number CX8525. Pin 4 of chip U2 is connected to the output terminal of the power input port circuit. Pin 6 of chip U2 is connected to pin 5 of chip U2, one end of resistor R14, and one end of inductor L1. The other end of resistor R14 is grounded through capacitor C10. The other end of inductor L1 is connected to one end of resistor R10, one end of resistor R13, and pin 3 of chip U2. The other end of resistor R10 is connected to the other end of resistor R13, one end of resistor R11, pin 2 of chip U2, one end of capacitor C6, one end of capacitor C7, one end of capacitor C8, and the second input terminal of the lamp switch control circuit. The other end of capacitor C6, the other end of capacitor C7, and the other end of capacitor C8 are grounded. The other end of resistor R11 is connected to one end of resistor R15, one end of capacitor C9, and pin 1 of chip U2. The other end of resistor R15 and the other end of capacitor C9 are grounded.

[0019] Chip U2 converts the operating voltage VIN into a high-power constant voltage and constant current output of 5V / 3A. Pin 1 of chip U2 receives the feedback voltage signal after voltage division by resistors R11 and R15 to ensure constant voltage output.

[0020] In this embodiment: Please refer to Figure 2 The lighting switch control circuit includes a MOSFET M1. The source (S) of MOSFET M1 is connected to one end of resistor R1, one end of resistor R2, one end of resistor R3, and the negative terminal of Zener diode D2. The other end of resistor R1 is connected to a second voltage through a switch controlled by the controller. The other end of resistor R2 is connected to an external power supply through another switch controlled by the controller. The gate (G) of MOSFET M1 is connected to the other end of resistor R3, the positive terminal of Zener diode D2, and one end of resistor R4. The drain (D) of MOSFET M1 is connected to the first terminal of the lighting interface OUTPUT1. The second terminal of the lighting interface OUTPUT1 is connected to the controller. The third terminal of the lighting interface OUTPUT1 is grounded. The lighting interface OUTPUT1 is connected to an external lighting fixture. The other end of resistor R4 is connected to the collector of transistor Q1. The emitter of transistor Q1 is grounded. The base of transistor Q1 is connected to the controller through resistor R5.

[0021] The lighting switch control circuit can be set to multiple groups. Here, we take the first group as an example. The first group of lights is a 5V / 3A RGB LED strip. The controller controls the switch at resistor R1 to be turned on and the switch at resistor R2 to be turned off. The controller (MCU) outputs a high level ON_OFF1. At this time, NPN transistor Q1 is turned on, which pulls down the gate voltage of MOSFET M1 (PMOS), making the source voltage much higher than the gate voltage. MOSFET M1 is turned on, and the 5V / 3A voltage is connected to the lighting interface OUTPUT1 through resistor R1 and MOSFET M1 to power the first group of lights. Conversely, if the controller outputs a low level to ON_OFF1, transistor Q1 and MOSFET M1 will be cut off, thus physically cutting off the positive terminal of the lamp's power supply and achieving energy saving. If the lamp is only turned off by the controller's control signal DATA without cutting off the power supply, the lamp's static power consumption will be very high. Taking SM16703 as an example, this static power consumption comes from the SM16703 chip datasheet. The static power consumption of one LED driver IC is about 2mA, and 100 driver ICs would be 0.2A.

[0022] If the first group of lights is a 12V / 2A or 24V / 2A LED strip, the controller will open the switch at resistor R1 and close the switch at resistor R2, allowing for different power supplies to meet the power needs of different lighting devices. This example uses two power supplies, but in actual use, it's not limited to these two; multiple lights, such as five, can be powered simultaneously, with the controller selecting one for each.

[0023] Adding a light switch control circuit to the positive terminal of the light fixture's power supply needs to meet the high power requirements of the light strip and also be compatible with different power supply ranges.

[0024] Regarding how to achieve multi-voltage combinations: In practice, the controller only performs the power conversion circuit required by the basic control circuit (5-24V input to 3.3V output, generally with low power); however, if the input is high voltage (e.g., 12-24V) while the LED strip requires low voltage (5V), then a high-power power conversion is needed.

[0025] As shown in the schematic diagram, the power supply circuit of the control section supplies power to the controller (such as the MCU); while the high-power step-down constant current and constant voltage circuit supplies power to the light strip (light fixture), and can achieve 12-24V input and 5V3A (this power is adjustable) constant current and constant voltage output, which is sufficient for most application scenarios.

[0026] Multiple sets of lights are controlled by separate switches; when multiple sets of lights require different voltage power supplies, the switch controller circuits for each set of lights can be set separately.

[0027] For specific implementation parameters, please refer to the multi-channel multi-voltage combination table:

[0028] By adding a control switch circuit to the positive terminal of the lamp's power supply, the lamp's power supply circuit is cut off when the lamp is turned off, thus truly achieving energy saving.

[0029] The lighting switch control circuit can meet the high current requirements of the lighting fixture by selecting different MOSFETs and MOSFET combinations, thus achieving high probability requirements. Since different MOSFETs have different gate-source voltages, this circuit uses Zener diode D2 to clamp the gate-source voltage of MOSFET M1, enabling it to support a wide voltage input of 5-24V.

[0030] The working principle of this utility model is as follows: the power input port circuit is used to introduce external power (e.g., DC5-24V), convert it into working voltage VIN, and output it to the power supply circuit of the control section and the high-power step-down constant current constant voltage circuit; the power supply circuit of the control section is used to convert the working voltage VIN into a first voltage (3.3V) for the controller to operate; the high-power step-down constant current constant voltage circuit is used to convert the working voltage VIN into a second voltage (5V / 3A) to power the lamps through the lamp switch control circuit; the lamp switch control circuit is used to receive the control of the controller and use the second voltage or external power as the power supply to power the lamps.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-path multi-voltage adaptive energy saving circuit for luminaire control, characterized by, This multi-channel, multi-voltage adaptive energy-saving circuit for lighting control includes: The power input port circuit is used to introduce external power, convert it into working voltage VIN, and output it to the power supply circuit of the control section and the high-power step-down constant current constant voltage circuit. The power supply circuit of the control section is used to convert the working voltage VIN into a first voltage for the controller to operate. A high-power step-down constant current constant voltage circuit is used to convert the working voltage VIN into a second voltage, which supplies power to the lamps through the lamp switch control circuit. The lighting switch control circuit is used to receive control from the controller and use a second voltage or external power supply to power the lighting fixture. The output of the power input port circuit is connected to the input of the power supply circuit of the control section and the input of the high-power step-down constant current and constant voltage circuit. The output of the power supply circuit of the control section is connected to the first input of the lighting switch control circuit, and the output of the high-power step-down constant current and constant voltage circuit is connected to the second input of the lighting switch control circuit.

2. The multi-path multi-voltage adaptive energy saving circuit for luminaire control according to claim 1, wherein, The power input port circuit includes interface INPUT1. The second terminal of interface INPUT1 is grounded. The first terminal of interface INPUT1 is connected to the positive terminal of diode D1. The negative terminal of diode D1 is connected to one end of capacitor C1, one end of capacitor C2, the input terminal of the power supply circuit of the control section, and the input terminal of the high-power step-down constant current constant voltage circuit. The other end of capacitor C1 is grounded, and the other end of capacitor C2 is grounded.

3. The multi-path multi-voltage adaptive energy saving circuit for luminaire control according to claim 1, wherein, The power supply circuit of the control section includes chip U1, model number HT7533. Pin 1 of chip U1 is grounded, pin 2 of chip U1 is connected to the output terminal of the power input port circuit, and pin 3 of chip U1 is connected to one end of capacitor C3, one end of capacitor C4, and the first input terminal of the lamp switch control circuit. The other end of capacitor C3 is grounded, and the other end of capacitor C4 is grounded.

4. The multi-channel, multi-voltage adaptive energy-saving circuit for lighting control according to claim 1, characterized in that, The high-power step-down constant current constant voltage circuit includes chip U2, model number CX8525. Pin 4 of chip U2 is connected to the output terminal of the power input port circuit. Pin 6 of chip U2 is connected to pin 5 of chip U2, one end of resistor R14, and one end of inductor L1. The other end of resistor R14 is grounded through capacitor C10. The other end of inductor L1 is connected to one end of resistor R10, one end of resistor R13, and pin 3 of chip U2. The other end of resistor R10 is connected to the other end of resistor R13, one end of resistor R11, pin 2 of chip U2, one end of capacitor C6, one end of capacitor C7, one end of capacitor C8, and the second input terminal of the lamp switch control circuit. The other ends of capacitor C6, C7, and C8 are grounded. The other end of resistor R11 is connected to one end of resistor R15, one end of capacitor C9, and pin 1 of chip U2. The other ends of resistor R15 and capacitor C9 are grounded.

5. The multi-channel, multi-voltage adaptive energy-saving circuit for lighting control according to any one of claims 1, 3, and 4, characterized in that, The lighting switch control circuit includes a MOSFET M1. The source (S) of MOSFET M1 is connected to one end of resistor R1, one end of resistor R2, one end of resistor R3, and the negative terminal of Zener diode D2. The other end of resistor R1 is connected to a second voltage through a switch controlled by the controller. The other end of resistor R2 is connected to an external power supply through another switch controlled by the controller. The gate (G) of MOSFET M1 is connected to the other end of resistor R3, the positive terminal of Zener diode D2, and one end of resistor R4. The drain (D) of MOSFET M1 is connected to the first terminal of the lighting interface OUTPUT1. The second terminal of the lighting interface OUTPUT1 is connected to the controller. The third terminal of the lighting interface OUTPUT1 is grounded. The lighting interface OUTPUT1 is connected to an external lighting fixture. The other end of resistor R4 is connected to the collector of transistor Q1. The emitter of transistor Q1 is grounded. The base of transistor Q1 is connected to the controller through resistor R5.

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