Lamp driver of AC detection dimming circuit

Abstract

The utility model discloses a lamp driver of an AC detection dimming circuit, which comprises a shell and a shell cover arranged on the shell, a control circuit board is arranged in the shell, and two ends of the shell are provided with an input terminal and an output terminal which are connected with the control circuit board; the control circuit board is provided with a rectification filter circuit connected with the input terminal, a controller connected with the rectification filter circuit, a transformer circuit and a lamp driving circuit, and the lamp driving circuit is arranged between the controller and the output terminal; the control circuit board is further provided with an AC detection circuit connected with the input terminal and a dimming drive circuit connected with the AC detection circuit, and the dimming drive circuit is electrically connected with the output terminal. According to the utility model, the structure arrangement is reasonable, the dimming driving circuit is enabled to realize voltage regulation of the lamp through the AC detection signal, the light brightness of the lamp is adjusted, the detection dimming operation is realized, the use stability of the whole structure is improved, the applicability is strong, and the practicability is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of lamp driving, and in particular relates to a lamp driver with an AC detection dimming circuit. Background Art

[0002] LED lamps are a common lighting and decorative structure, which generally include a shell, a light source board and a control circuit board. Conventional control circuit boards can only realize the on / off control of the light source board. Although they can meet the general usage requirements, they cannot effectively realize self-test dimming control, which will affect the stability of use and scope of application to a certain extent, and therefore their practicality is limited. Summary of the Invention

[0003] The purpose of the utility model is to provide a lamp driver with an AC detection dimming circuit which has a reasonable structure and is conducive to realizing detection dimming operation.

[0004] The technical solution for achieving the purpose of the utility model is a lamp driver with an AC detection dimming circuit, comprising a housing, a housing cover provided on the housing, a control circuit board provided in the housing, and input terminals and output terminals connected to the control circuit board provided at both ends of the housing;

[0005] The control circuit board is provided with a rectifier filter circuit connected to the input terminal, a controller, a transformer circuit and a lamp driving circuit connected to the rectifier filter circuit, and the lamp driving circuit is provided between the controller and the output terminal;

[0006] The control circuit board is further provided with an AC detection circuit connected to the input terminal and a dimming drive circuit connected to the AC detection circuit. The dimming drive circuit is electrically connected to the output terminal.

[0007] Further preferably, the AC detection circuit includes an eleventh unidirectional diode, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor and an optical coupler;

[0008] The eleventh unidirectional diode, the thirty-fourth resistor, and the thirty-fifth resistor are connected in series, the anode of the eleventh unidirectional diode is connected to the cathode of the input terminal, the other end of the thirty-fifth resistor is connected to the anode of the input terminal of the optocoupler, the anode of the input terminal is connected to the cathode of the input terminal of the optocoupler, and the thirty-sixth resistor is connected in parallel between the anode and cathode of the input terminal of the optocoupler;

[0009] The output end of the optical coupler is connected to the dimming drive circuit.

[0010] Further preferably, the dimming drive circuit includes a control single chip microcomputer and two voltage divider circuits with the same structure connected to the output terminal of the control single chip microcomputer, and the two voltage divider circuits are connected to the voltage stabilizing chip in the lamp drive circuit;

[0011] The voltage divider circuit includes a unidirectional diode and a resistor connected in series.

[0012] Further preferably, the main chip model of the controller is UC3854.

[0013] Further preferably, the AC detection circuit and the dimming drive circuit are arranged at two ends of the housing.

[0014] The utility model has positive effects: the structure of the utility model is reasonably set up, and it is provided with an AC detection circuit and a dimming drive circuit. The AC detection signal can be used to enable the dimming drive circuit to adjust the voltage of the lamp, thereby adjusting the light brightness of the lamp, which is conducive to realizing the detection of dimming operations, and is conducive to improving the stability of the overall structure, and has strong applicability and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein:

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a specific circuit diagram of the present utility model.

[0018] Reference numerals: housing 1 , control circuit board 2 , input terminal 3 , output terminal 4 , rectifier and filter circuit 5 , controller 6 , transformer circuit 7 , lamp driving circuit 8 , AC detection circuit 9 , dimming driving circuit 10 . DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0020] See Figure 1 and Figure 2As shown, a lamp driver with an AC detection dimming circuit includes a shell 1, a shell cover arranged on the shell, a control circuit board 2 is arranged in the shell, and input terminals 3 and output terminals 4 connected to the control circuit board are arranged at both ends of the shell; in this embodiment, the shell and the shell cover are conventional structures in the prior art, and can be aluminum or stainless steel structures, or insulating plastic structures, the input terminals are electrically connected to the market, and the output terminals are connected to the lamp.

[0021] In actual use, the control circuit board is equipped with a rectifier and filter circuit 5 connected to the input terminal, a controller 6, a transformer circuit 7, and a lamp driver circuit 8 connected to the rectifier and filter circuit. The lamp driver circuit is located between the controller and the output terminal. The controller's main chip model is UC3854. The rectifier and filter circuit, controller, transformer circuit 7, and lamp driver circuit 8 are all conventional structures in the prior art and are only briefly used, so detailed description is not provided.

[0022] In this embodiment, the control circuit board is also provided with an AC detection circuit 9 connected to the input terminal and a dimming drive circuit 10 connected to the AC detection circuit. The dimming drive circuit is electrically connected to the output terminal. The AC detection circuit detects the input terminal and generates a corresponding signal, which is processed by the control chip of the dimming drive circuit and drives the lamp to achieve dimming operation. The control chip of the dimming drive circuit is SM15106T, SL8701, or BP5178L, but other common programmable microcontrollers can also be used, so detailed description is not provided.

[0023] The AC detection circuit includes an eleventh unidirectional diode D11, a thirty-fourth resistor R34, a thirty-fifth resistor R35, a thirty-sixth resistor R36, and an optocoupler U5. When connected, the eleventh unidirectional diode, the thirty-fourth resistor, and the thirty-fifth resistor are connected in series, the anode of the eleventh unidirectional diode is connected to the cathode of the input terminal, the other end of the thirty-fifth resistor is connected to the anode of the optocoupler input terminal, the anode of the input terminal is connected to the cathode of the optocoupler input terminal, and the thirty-sixth resistor is connected in parallel between the anode and cathode of the optocoupler input terminal. The output of the optocoupler is connected to a dimming drive circuit. The dimming drive circuit includes a control microcontroller and two identical voltage divider circuits connected to the output of the control microcontroller. The two voltage divider circuits are connected to a voltage stabilizing chip in the lamp drive circuit. The voltage divider circuit includes a unidirectional diode and a resistor connected in series. In actual application, the control microcontroller receives the AC signal from the AC detection circuit and outputs two controllable basic voltage signals, which are divided by the D12 and R38 series circuit and the D13 and R37 series circuit respectively. The resistance value of R37 is 6.8K and the resistance value of R38 is 15K. They can change the reference voltage of the voltage regulator chip in the lamp circuit, thereby realizing the adjustment of the output voltage.

[0024] In order to save overall space, the AC detection circuit and the dimming drive circuit are arranged at both ends of the housing during processing and connection, matching with the input terminal and the output terminal.

[0025] The utility model has positive effects: the structure of the utility model is reasonably set up, and it is provided with an AC detection circuit and a dimming drive circuit. The AC detection signal can be used to enable the dimming drive circuit to adjust the voltage of the lamp, thereby adjusting the light brightness of the lamp, which is conducive to realizing the detection of dimming operations, and is conducive to improving the stability of the overall structure, and has strong applicability and good practicality.

[0026] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components described in the specification can also be directly processed according to existing technical common sense without any doubt. At the same time, the connection method of each component adopts the mature conventional means in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so no specific description is given here.

[0027] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to enumerate all embodiments here. However, obvious variations or modifications arising from the essence of the present invention remain within the scope of protection of the present invention.

Claims

1. A lamp driver with an AC detection dimming circuit, comprising a housing and a cover disposed on the housing, characterized in that: A control circuit board is provided in the housing, and input terminals and output terminals connected to the control circuit board are provided at both ends of the housing; The control circuit board is provided with a rectifier filter circuit connected to the input terminal, a controller, a transformer circuit and a lamp driving circuit connected to the rectifier filter circuit, and the lamp driving circuit is provided between the controller and the output terminal; The control circuit board is further provided with an AC detection circuit connected to the input terminal and a dimming drive circuit connected to the AC detection circuit. The dimming drive circuit is electrically connected to the output terminal.

2. The lamp driver with an AC detection dimming circuit according to claim 1, characterized in that: The AC detection circuit includes an eleventh unidirectional diode, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, and an optical coupler; The eleventh unidirectional diode, the thirty-fourth resistor, and the thirty-fifth resistor are connected in series, the anode of the eleventh unidirectional diode is connected to the cathode of the input terminal, the other end of the thirty-fifth resistor is connected to the anode of the input terminal of the optocoupler, the anode of the input terminal is connected to the cathode of the input terminal of the optocoupler, and the thirty-sixth resistor is connected in parallel between the anode and cathode of the input terminal of the optocoupler; The output end of the optical coupler is connected to the dimming drive circuit.

3. The lamp driver with an AC detection dimming circuit according to claim 2, wherein: The dimming drive circuit includes a control single chip microcomputer and two voltage divider circuits with the same structure connected to the output end of the control single chip microcomputer. The two voltage divider circuits are connected to the voltage stabilizing chip in the lamp drive circuit. The voltage divider circuit includes a unidirectional diode and a resistor connected in series.

4. The lamp driver with an AC detection dimming circuit according to claim 1, wherein: The main chip model of the controller is UC3854.

5. The lamp driver with an AC detection dimming circuit according to claim 2, wherein: The AC detection circuit and the dimming drive circuit are arranged at two ends of the housing.

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