DALI dimming non-isolated output wide-range power supply

Abstract

The utility model relates to the technical field of power supplies, in particular to a DALI (Digital Addressable Lighting Interface) dimming non-isolated output wide-range power supply, which comprises an EMC (Electro Magnetic Compatibility) circuit, a rectifying circuit, an active and passive bleeder circuit, a PFC (Power Factor Correction) circuit, a BUCK circuit, a chip power supply circuit, a DALI dimming circuit and a relay switch circuit, the output end of the DALI dimming circuit is connected with the input end of the relay switch circuit, and the input end of the rectifying circuit is connected with an EMC circuit; according to the utility model, the non-isolated power supply in the market has low safety, high output voltage during no-load, the risk of electric shock is reduced, a DALI dimming non-isolated output voltage wide-range power supply is realized, the output is closed when the DALI circuit detects that the output voltage is high and a high level is supplied to the normally-closed relay during no-load, and the protection effect is achieved when the output voltage does not exist; and low power consumption can be achieved after the output is closed during no-load, so that the loss of a power grid is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to a DALI dimming non-isolated output wide range power supply. Background Art

[0002] LED lighting now needs more and more brightness control (dimming). DALI dimming is a typical digital PWM dimming method. Through the DALI dimming device, instructions are sent to the lamp control end. DALI can dim each power supply with a matching address separately, control the current output by the power supply, and thus control the brightness of the lamp. The advantage is that the dimming is accurate, stable, and smooth. Most of the products on the market now have a limited output voltage range of isolated power supplies and low efficiency. When non-isolated power supplies are repaired, there is a loop with the input voltage, which is prone to the risk of electric shock. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a DALI dimming non-isolated output wide-range power supply to solve the technical problems in the prior art that "most of the products on the market now have a limited output voltage range of isolated power supplies and low efficiency, and the non-isolated power supply has a loop with the input voltage during maintenance, which easily causes the risk of electric shock."

[0004] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] A DALI dimming non-isolated output wide range power supply, characterized in that it includes an EMC circuit, a rectifier circuit, an active and passive discharge circuit, a PFC circuit, a BUCK circuit, a chip power supply circuit, a DALI dimming circuit, and a relay switch circuit. The EMC circuit and one input end of the DALI dimming circuit are connected to the mains, the output end of the DALI dimming circuit is connected to the input end of the relay switch circuit, the input end of the rectifier circuit is connected to the EMC circuit, the output end of the rectifier circuit is connected to the BUCK circuit via the active and passive discharge circuit and the PFC circuit, the PFC circuit is connected to the input end of the BUCK circuit, and the output end of the BUCK circuit is connected to a normally closed relay.

[0006] As a preferred technical solution of the present utility model, the rectifier circuit is used to convert the input AC mains power into DC power.

[0007] As a preferred technical solution of the present utility model, the output end of the DALI dimming circuit is provided with a signal access end.

[0008] As a preferred technical solution of the utility model, an LED lighting device is provided at the output end of the relay switch circuit.

[0009] The utility model provides a DALI dimming non-isolated output wide range power supply, which has the following beneficial effects:

[0010] DALI dimming non-isolated output voltage wide range power supply. When it is unloaded, the DALI dimming circuit detects that the output voltage is high and gives a high level to the normally closed relay, and the output is turned off. The output voltage has no protection effect. When it is unloaded, turning off the output can achieve low power consumption, greatly reducing the loss to the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a principle block diagram of a DALI dimming non-isolated output wide range power supply proposed by the utility model;

[0012] Figure 2 The utility model provides a circuit diagram of a DALI dimming non-isolated output wide-range power supply. DETAILED DESCRIPTION

[0013] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0014] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments:

[0015] refer to Figure 1-2 A DALI dimming non-isolated output wide range power supply includes an EMC circuit, a rectifier circuit, an active and passive discharge circuit, a PFC circuit, a BUCK circuit, a chip power supply circuit, a DALI dimming circuit, and a relay switch circuit. The EMC circuit and one input end of the DALI dimming circuit are connected to the mains, the output end of the DALI dimming circuit is connected to the input end of the relay switch circuit, the input end of the rectifier circuit is connected to the EMC circuit, the output end of the rectifier circuit is connected to the active and passive discharge circuit, the active and passive discharge circuit is connected to the PFC circuit, the PFC circuit is connected to the input end of the BUCK circuit, and the output end of the BUCK circuit is connected to the normally closed relay switch circuit.

[0016] Furthermore, the rectifier circuit is used to convert the input AC mains power into DC power.

[0017] Furthermore, the output end of the DALI dimming circuit is provided with a signal access end.

[0018] Furthermore, the output end of the relay switch circuit is connected to an LED lighting device.

[0019] Furthermore, the power-on ends of the PFC circuit, the buck circuit, and the DALI dimming circuit are all connected to the chip power supply circuit.

[0020] An input terminal of the EMC circuit is connected to the mains, and the output terminal of the EMC circuit is connected to the input terminal of the rectifier circuit. The input terminal can be connected to the mains 176Vac-264Vac, and the AC is converted into DC through the EMC circuit and the rectifier circuit.

[0021] When the input is turned on, the chip U102 works, and the chip power supply circuit starts to work, providing a stable 15V voltage. At this time, the capacitor CE103 supplies power to the PFC circuit, the BUCK circuit, and the DALI dimming circuit respectively. When each part of the circuit works, the inductor L1 and T102 induce electromotive force, and the output voltage is adjusted through the 3rd foot of U201, and the current is adjusted through the 6th foot. The output is connected to a capacitor CE201 for filtering, and a 12V normally closed relay is connected after the output. When the power supply is working, the dimming line CN201 gives a low level, and the relay does not work. The power supply is unloaded or the output line is loose. The sub-board gives the relay a high level, and the relay works (disconnected) and the power output is powered off. When working, it can prevent accidental contact with the output terminal and electric shock, which greatly improves safety. Lightning protection devices (RV101) and surge suppression devices (RT101) are added to the input end to ensure that the circuit is not broken down when lightning strikes or when multiple inputs are connected in parallel and powered on, and the relay cannot be started, which effectively protects the reliability of the circuit.

[0022] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A DALI dimming non-isolated output wide range power supply, characterized in that: The invention comprises an EMC circuit, a rectifier circuit, an active and passive discharge circuit, a PFC circuit, a BUCK circuit, a chip power supply circuit, a DALI dimming circuit, and a relay switch circuit. An input end of the EMC circuit and the DALI dimming circuit is connected to the mains, an output end of the DALI dimming circuit is connected to an input end of the relay switch circuit, an input end of the rectifier circuit is connected to the EMC circuit, an output end of the rectifier circuit is connected to the BUCK circuit via an active and passive discharge circuit and a PFC circuit, the PFC circuit is connected to the input end of the BUCK circuit, and an output end of the BUCK circuit is connected to a normally closed relay.

2. A DALI dimming non-isolated output wide range power supply according to claim 1, characterized in that: The rectifier circuit is used to convert the input AC mains power into DC power.

3. A DALI dimming non-isolated output wide range power supply according to claim 1, characterized in that: The output end of the DALI dimming circuit is provided with a signal access end.

4. A DALI dimming non-isolated output wide range power supply according to claim 1, characterized in that: The output end of the relay switch circuit is provided with an LED lighting device.

5. A DALI dimming non-isolated output wide range power supply according to claim 1, characterized in that: The power-on ends of the PFC circuit, buck circuit, and DALI dimming circuit are all connected to the chip power supply circuit.

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