A lamp starting control circuit

Abstract

The utility model discloses a lamp slow start control circuit of starting, be connected with switching power supply, including energy storage capacitor, voltage dividing circuit, output voltage control circuit and switching switch circuit, energy storage capacitor is connected with input voltage, is used for charging energy storage, voltage dividing circuit is connected with energy storage capacitor, is used for voltage dividing slow opening, output voltage control circuit is connected with voltage dividing circuit, is used for keeping a stable value output and realizes slow start control, switching switch circuit is connected with output voltage control circuit, is used for switching change different output voltage value. The utility model discloses the structure setting is reasonable, and its overall structure component is few, and each partial structure adopts discrete component and realizes, can promote use reliability, and the synchronism is strong, can realize different selection through switching switch, is favorable to satisfy the use demand of different situation, is favorable to reduce cost, also is convenient for the operation of overhaul and maintenance, is favorable to promote use stability and reliability.

Description

Technical Field

[0001] This utility model belongs to the field of lighting control circuit technology, specifically relating to a lighting fixture soft-start control circuit. Background Technology

[0002] Lighting fixtures are a common type of lighting and decorative electrical appliance. They are generally equipped with control circuits for starting and stopping the fixtures. In the existing technology, LED light sources have a fast response time, meaning that the LED light source starts or stops simultaneously when the switch is activated, as shown in CN201621309503.8, a power supply starting circuit. While this can meet the needs of general use, it cannot meet the needs of certain environments, such as low-light environments. In such environments, it can cause discomfort to the human eye and may also generate a large instantaneous current, causing the LED light source to burn out and affecting its stable operation. Utility Model Content

[0003] The purpose of this utility model is to provide a lamp start-up soft-start control circuit with a reasonable structure that is conducive to improving the stability of use.

[0004] The technical solution to achieve the purpose of this utility model is a lamp start-up soft start control circuit, which is connected to a switching power supply and includes an energy storage capacitor, a voltage divider circuit, an output voltage control circuit, and a switching circuit.

[0005] The energy storage capacitor is connected to the input voltage and is used for charging and energy storage;

[0006] The voltage divider circuit is connected to the energy storage capacitor and is used to slowly turn on the voltage.

[0007] The output voltage control circuit is connected to the voltage divider circuit to maintain a stable output value and achieve soft start control;

[0008] The switching circuit is connected to the output voltage control circuit; it is used to switch and change different output voltage values.

[0009] A further preferred embodiment is that the voltage divider circuit includes a first switch, a thirty-sixth resistor, a thirty-ninth resistor, a fortieth resistor, a fourth voltage regulator, a forty-first resistor, a twentieth capacitor, a nineteenth capacitor, a forty-second resistor, a second optocoupler, and a thirty-first resistor.

[0010] The nineteenth capacitor, the thirty-ninth resistor, and the fortieth resistor are connected in parallel, with one end connected to the control terminal of the fourth voltage regulator and the other end grounded.

[0011] The first switch and the thirty-sixth resistor are connected in series between the negative terminal of the energy storage capacitor and the control terminal of the fourth voltage regulator;

[0012] The twentieth capacitor and the forty-second resistor are connected in series between the control terminal and the negative terminal of the fourth voltage regulator;

[0013] The second optocoupler is connected in series with the forty-first resistor, with one end connected to the positive terminal of the energy storage capacitor and the other end connected to the negative terminal of the fourth voltage regulator.

[0014] The thirty-first resistor is connected in parallel with the second optocoupler.

[0015] A further preferred embodiment is that the output voltage control circuit includes a forty-third resistor, a twenty-fourth capacitor, a fifth voltage regulator, a forty-ninth resistor, a forty-eighth resistor, and a forty-fifth resistor;

[0016] The forty-third resistor is connected between the thirty-first resistor and the negative terminal of the fifth voltage regulator. The twenty-fourth capacitor, the forty-ninth resistor, and the forty-eighth resistor are connected in parallel, with one end connected to the control terminal of the fifth voltage regulator and the other end grounded.

[0017] The forty-fifth resistor is connected between the positive terminal of the energy storage capacitor and the control terminal of the fifth voltage regulator.

[0018] A further preferred embodiment is that the switching circuit includes a second switch, a third switch, a forty-sixth resistor, and a forty-seventh resistor;

[0019] The second switch is connected in series with the forty-sixth resistor;

[0020] The third switch is connected in series with the forty-seventh resistor;

[0021] Furthermore, the series circuit of the second switch and the forty-sixth resistor, and the series circuit of the third switch and the forty-seventh resistor, are all connected in parallel with the forty-fifth resistor.

[0022] This utility model has positive effects: its structure is reasonable, with few components and each part is implemented using discrete components, which not only improves the reliability of use, but also has strong synchronization. Different selections can be achieved by switching the switch, which helps to meet the needs of different situations, reduces costs, and facilitates inspection and maintenance operations, thus improving the stability and reliability of use. Attached Figure Description

[0023] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0024] Figure 1 This is a schematic diagram of the specific circuit structure of this utility model.

[0025] Figure labels: Voltage divider circuit 1, output voltage control circuit 2, switching circuit 3. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example

[0028] See Figure 1 A soft-start control circuit for a lighting fixture, connected to a switching power supply, includes an energy storage capacitor EC5, a voltage divider circuit 1, an output voltage control circuit 2, and a switching circuit 3. In this embodiment, the energy storage capacitor is connected to the input voltage for charging and energy storage; the voltage divider circuit is connected to the energy storage capacitor for slow voltage division and start-up; the output voltage control circuit is connected to the voltage divider circuit to maintain a stable output value and achieve soft-start control; and the switching circuit is connected to the output voltage control circuit to switch between different output voltage values. Each part of the circuit is implemented using discrete components, which not only improves reliability but also ensures strong synchronization.

[0029] Furthermore, the voltage divider circuit includes a first switch K1, a thirty-sixth resistor R36, a thirty-ninth resistor R39, a fortieth resistor R40, a fourth voltage regulator U4, a forty-first resistor R41, a twentieth capacitor C20, a nineteenth capacitor C19, a forty-second resistor R42, a second optocoupler U2B, and a thirty-first resistor R31. When connected, the nineteenth capacitor, the thirty-ninth resistor, and the fortieth resistor are connected in parallel, with one end connected to the control terminal of the fourth voltage regulator and the other end grounded. The first switch and the thirty-sixth resistor are connected in series between the negative terminal of the energy storage capacitor and the control terminal of the fourth voltage regulator. The twentyth capacitor and the forty-second resistor are connected in series between the control terminal and the negative terminal of the fourth voltage regulator. The second optocoupler is connected in series with the forty-first resistor, with one end connected to the positive terminal of the energy storage capacitor and the other end connected to the negative terminal of the fourth voltage regulator. The thirty-first resistor is connected in parallel with the second optocoupler. When in use, pressing switch K1 activates the slow-start mode. The input voltage begins to charge EC5 and flows through the voltage divider circuit composed of R36, R39, R40, U4, R41, R31, and U2B. U4 begins to operate, and a relatively small current flows through U2B. As time progresses, EC5 slowly charges, U4 reaches full operation, and the output voltage of the entire circuit rises to the set range. The slow-start circuit has completed its slow-start state.

[0030] Meanwhile, its output voltage control circuit includes a 43rd resistor R43, a 24th capacitor C24, a 5th voltage regulator U5, a 49th resistor R49, a 48th resistor R48, and a 45th resistor R45. In connection, the 43rd resistor is connected between the 31st resistor and the negative terminal of the 5th voltage regulator. The 24th capacitor, 49th resistor, and 48th resistor are connected in parallel, with one end connected to the control terminal of the 5th voltage regulator and the other end grounded. The 45th resistor is connected between the positive terminal of the energy storage capacitor and the control terminal of the 5th voltage regulator. When the output set value is reached, the pre-stage slow-start circuit ceases operation, and the output voltage control circuit composed of R31, R43, U5, R49, R48, and R45 takes over. After setting the required parameter values, the output remains at a relatively stable standard value, thus achieving a slow-start workflow.

[0031] Meanwhile, the switching circuit includes a second switch K2, a third switch K3, a forty-sixth resistor R46, and a forty-seventh resistor R47. In connection, the second switch and the forty-sixth resistor are connected in series; the third switch and the forty-seventh resistor are connected in series; and both the series circuit of the second switch and the forty-sixth resistor, and the series circuit of the third switch and the forty-seventh resistor, are connected in parallel with the forty-fifth resistor. Switching between the K2 and K3 push-button switches changes the output voltage value, allowing for different lamp voltages. Combined with the forty-fifth resistor, where the three resistors R45, R46, and R47 have different resistance values, three levels of variable power can be achieved.

[0032] This utility model has positive effects: its structure is reasonable, with few components and each part is implemented using discrete components, which not only improves the reliability of use, but also has strong synchronization. Different selections can be achieved by switching the switch, which helps to meet the needs of different situations, reduces costs, and facilitates inspection and maintenance operations, thus improving the stability and reliability of use.

[0033] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural parts described in the instruction manual can also be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0034] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A lamp start-up soft-start control circuit, connected to a switching power supply, characterized in that: This includes an energy storage capacitor, a voltage divider circuit, an output voltage control circuit, and a switching circuit; The energy storage capacitor is connected to the input voltage and is used for charging and energy storage; The voltage divider circuit is connected to the energy storage capacitor and is used to slowly turn on the voltage. The output voltage control circuit is connected to the voltage divider circuit to maintain a stable output value and achieve soft start control; The switching circuit is connected to the output voltage control circuit; it is used to switch and change different output voltage values.

2. The lamp start-up soft-start control circuit according to claim 1, characterized in that: The voltage divider circuit includes a first switch, a thirty-sixth resistor, a thirty-ninth resistor, a fortieth resistor, a fourth voltage regulator, a forty-first resistor, a twentieth capacitor, a nineteenth capacitor, a forty-second resistor, a second optocoupler, and a thirty-first resistor; The nineteenth capacitor, the thirty-ninth resistor, and the fortieth resistor are connected in parallel, with one end connected to the control terminal of the fourth voltage regulator and the other end grounded. The first switch and the thirty-sixth resistor are connected in series between the negative terminal of the energy storage capacitor and the control terminal of the fourth voltage regulator; The twentieth capacitor and the forty-second resistor are connected in series between the control terminal and the negative terminal of the fourth voltage regulator; The second optocoupler is connected in series with the forty-first resistor, with one end connected to the positive terminal of the energy storage capacitor and the other end connected to the negative terminal of the fourth voltage regulator. The thirty-first resistor is connected in parallel with the second optocoupler.

3. The lamp start-up soft-start control circuit according to claim 2, characterized in that: The output voltage control circuit includes a forty-third resistor, a twenty-fourth capacitor, a fifth voltage regulator, a forty-ninth resistor, a forty-eighth resistor, and a forty-fifth resistor; The forty-third resistor is connected between the thirty-first resistor and the negative terminal of the fifth voltage regulator. The twenty-fourth capacitor, the forty-ninth resistor, and the forty-eighth resistor are connected in parallel, with one end connected to the control terminal of the fifth voltage regulator and the other end grounded. The forty-fifth resistor is connected between the positive terminal of the energy storage capacitor and the control terminal of the fifth voltage regulator.

4. The lamp start-up soft-start control circuit according to claim 3, characterized in that: The switching circuit includes a second switch, a third switch, a forty-sixth resistor, and a forty-seventh resistor; The second switch is connected in series with the forty-sixth resistor; The third switch is connected in series with the forty-seventh resistor; Furthermore, the series circuit of the second switch and the forty-sixth resistor, and the series circuit of the third switch and the forty-seventh resistor, are all connected in parallel with the forty-fifth resistor.

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