A three-wire low-voltage drive power supply circuit

Abstract

This utility model discloses a three-wire low-voltage drive power supply circuit, including a three-wire input terminal, a rectifier and filter circuit, a PFC boost circuit, a voltage regulator circuit, a power adjustment circuit, an AC detection circuit, and a control drive circuit. The rectifier and filter circuit is connected to the three-wire input terminal, the PFC boost circuit is connected to the rectifier and filter circuit, the voltage regulator circuit is connected to the PFC boost circuit, the power adjustment circuit is connected to the PFC boost circuit, the AC detection circuit is connected to the input terminal of the rectifier and filter circuit, and the control drive circuit is connected to the voltage regulator circuit. This utility model has a reasonable structural design. Through the power adjustment circuit, AC detection circuit, and control drive circuit, power adjustment and output control adjustment can be realized, facilitating adjustment and control operation, improving ease of use and reliability, and meeting the needs of different applications.

Description

Technical Field

[0001] This utility model belongs to the field of power supply circuit technology, specifically relating to a three-wire low-voltage drive power supply circuit. Background Technology

[0002] A driver power supply is a power supply circuit for electrical appliances such as lamps. It generally includes an AC input terminal and a rectifier and filter circuit connected to the AC input terminal. It can also be equipped with a corresponding PFC boost circuit and auxiliary power supply circuit, as shown in CN202322379482.3. Although it can meet the general usage requirements, it is not conducive to control and adjustment operations, which will affect its applicability, reduce its ease of use and effectiveness, and make it difficult to meet market demands. Utility Model Content

[0003] The purpose of this invention is to provide a three-wire low-voltage drive power supply circuit with a reasonable structure and convenient control and adjustment.

[0004] The technical solution to achieve the purpose of this utility model is a three-wire low-voltage drive power supply circuit, including a three-wire input terminal, a rectifier and filter circuit, a PFC boost circuit, a voltage regulator circuit, a power adjustment circuit, an AC detection circuit, and a control and drive circuit. The rectifier and filter circuit is connected to the three-wire input terminal and is used to rectify and filter the input power supply.

[0005] The PFC boost circuit is connected to the rectifier filter circuit and is used to boost the input voltage to 400V;

[0006] The voltage regulator circuit is connected to the PFC boost circuit and is used to step down the input voltage and supply power to the control drive circuit.

[0007] The power regulation circuit is connected to the PFC boost circuit and is used to receive PWM signals and realize output power regulation control.

[0008] The AC detection circuit is connected to the input terminal of the rectifier filter circuit and is used to detect AC signals and provide detection signals to the control drive circuit.

[0009] The control drive circuit is connected to the voltage regulator circuit, and the PWMC signal terminal of the control drive circuit is connected to the power regulation circuit for output power drive control.

[0010] A further preferred embodiment is that the voltage regulator circuit includes a non-isolated buck constant voltage driver chip and an electrolytic capacitor circuit;

[0011] The output voltage of the voltage regulator circuit is 3.3V.

[0012] A further preferred embodiment is that the non-isolated buck constant voltage driver chip is model BP2525F.

[0013] A further preferred embodiment is that the control drive circuit includes a control chip, an optocoupler control circuit connected to the control chip, a drive circuit connected to the optocoupler control circuit, and an output terminal connected to the drive circuit.

[0014] A further preferred embodiment is that the main chip of the PFC boost circuit is BP2628D.

[0015] This utility model has positive effects: its structure is reasonably designed, which can not only effectively realize PFC boost regulation, but also realize power regulation and output control regulation through power regulation circuit, AC detection circuit and control drive circuit, which facilitates regulation and control operation, improves the ease of use and reliability, can meet the needs of different situations and has strong applicability. Attached Figure Description

[0016] 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:

[0017] Figure 1 This is a schematic diagram of the specific circuit structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the amplifier circuit of the rectifier filter circuit in this utility model;

[0019] Figure 3 This is a schematic diagram of the amplifier circuit of the PFC boost circuit in this utility model;

[0020] Figure 4 This is a detailed circuit diagram of the voltage stabilization power supply circuit, AC detection circuit, and control drive circuit in this utility model.

[0021] Figure 5 This is a schematic diagram of the power regulation circuit in this utility model.

[0022] Figure reference numerals: 1. Three-wire input terminal; 2. Rectifier and filter circuit; 3. PFC boost circuit; 4. Regulated power supply circuit; 5. Power adjustment circuit; 6. AC detection circuit; 7. Control and drive circuit; 7. Control chip; 71. Optocoupler control circuit; 72. Drive circuit; 73. Output terminal; 74. Detailed Implementation

[0023] 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.

[0024] Example

[0025] See Figures 1 to 5 As shown, a three-wire low-voltage drive power supply circuit includes a three-wire input terminal 1, a rectifier and filter circuit 2, a PFC boost circuit 3, a voltage regulator circuit 4, a power adjustment circuit 5, an AC detection circuit 6, and a control drive circuit 7. The three-wire input terminal is a three-phase mains connection terminal. When connected, the rectifier and filter circuit is connected to the three-wire input terminal to rectify and filter the input power supply. The PFC boost circuit is connected to the rectifier and filter circuit to boost the input voltage to 400V. The voltage regulator circuit is connected to the PFC boost circuit to step down the input voltage and supply power to the control drive circuit. The power adjustment circuit is connected to the PFC boost circuit to receive PWM signals and implement output power regulation control. The main chip of the PFC boost circuit is a BP2628D.

[0026] The AC detection circuit is connected to the input terminal of the rectifier and filter circuit to detect AC signals and provide detection signals to the control drive circuit. The control drive circuit is connected to the voltage regulator circuit, and its PWMC signal terminal is connected to the power adjustment circuit for output power drive control. The output terminals of the control drive circuit are used to connect to the Y or W terminals of the lamp, enabling different control operations of the lamp.

[0027] In this embodiment, the voltage regulator circuit includes a non-isolated buck-constant voltage driver chip and an electrolytic capacitor circuit; the output voltage of the voltage regulator circuit is 3.3V. Furthermore, the non-isolated buck-constant voltage driver chip is model BP2525F.

[0028] In this embodiment, the control drive circuit includes a control chip 71, an optocoupler control circuit 72 connected to the control chip, a drive circuit 73 connected to the optocoupler control circuit, and an output terminal 74 connected to the drive circuit. The control chip is a conventional chip from the prior art, such as the 51 System-on-a-Chip, and is simply applied in a basic manner.

[0029] This utility model has positive effects: its structure is reasonably designed, which can not only effectively realize PFC boost regulation, but also realize power regulation and output control regulation through power regulation circuit, AC detection circuit and control drive circuit, which facilitates regulation and control operation, improves the ease of use and reliability, can meet the needs of different situations and has strong applicability.

[0030] 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.

[0031] 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 three-wire low-voltage drive power supply circuit, comprising a three-wire input terminal, a rectifier and filter circuit, a PFC boost circuit, a voltage regulator circuit, a power adjustment circuit, an AC detection circuit, and a control and drive circuit, characterized in that: The rectifier and filter circuit is connected to the three-wire input terminal and is used to rectify and filter the input power supply. The PFC boost circuit is connected to the rectifier filter circuit and is used to boost the input voltage to 400V; The voltage regulator circuit is connected to the PFC boost circuit and is used to step down the input voltage and supply power to the control drive circuit. The power regulation circuit is connected to the PFC boost circuit and is used to receive PWM signals and realize output power regulation control. The AC detection circuit is connected to the input terminal of the rectifier filter circuit and is used to detect AC signals and provide detection signals to the control drive circuit. The control drive circuit is connected to the voltage regulator circuit, and the PWMC signal terminal of the control drive circuit is connected to the power regulation circuit for output power drive control.

2. The three-wire low-voltage drive power supply circuit according to claim 1, characterized in that: The voltage regulated power supply circuit includes a non-isolated buck constant voltage driver chip and an electrolytic capacitor circuit; The output voltage of the voltage regulator circuit is 3.3V.

3. The three-wire low-voltage drive power supply circuit according to claim 2, characterized in that: The non-isolated buck constant voltage driver chip is model BP2525F.

4. The three-wire low-voltage drive power supply circuit according to claim 1, characterized in that: The control drive circuit includes a control chip, an optocoupler control circuit connected to the control chip, a drive circuit connected to the optocoupler control circuit, and an output terminal connected to the drive circuit.

5. A three-wire low-voltage drive power supply circuit according to claim 1, characterized in that: The main chip of the PFC boost circuit is model BP2628D.

Images