0-10V dimming non-isolated high-voltage output power supply compatible with NFC function

Abstract

The utility model discloses a 0-10V dimming non-isolated high-voltage output power supply compatible with an NFC function, which relates to the technical field of LED driving power supplies and comprises an EMI circuit, a three-terminal sampling integrated circuit, an input electromagnetic interference circuit, a damping leakage circuit, a lightning protection circuit, a full-wave rectification circuit, a BOOST circuit, a BUCK circuit, an LDO circuit, a single-chip microcomputer dimming circuit, a relay circuit and an NFC circuit. The output end of the full-wave rectification circuit is connected with the BOOST circuit, the output end of the BOOST circuit is connected with the LDO circuit, the LDO circuit, the BUCK circuit, the single-chip microcomputer dimming circuit, the NFC circuit and the relay circuit are sequentially connected, 0-10 V dimming is achieved for the BOOST circuit, the BUCK circuit, the single-chip microcomputer circuit and the dimming circuit after passing through the EMI circuit, the output is provided with a relay and overvoltage detection, the safety of a non-isolated power supply is improved, the NFC dimming function is achieved, and the power supply is safe and reliable. The dimming diversity is increased, and the dimming fineness is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of LED drive circuits, in particular to a 0-10V dimming non-isolated high-voltage output power supply compatible with NFC function. Background Technique

[0002] At present, LED lighting has higher requirements for dimming methods and effects. In addition, the efficiency requirements for power supplies are becoming more and more stringent. Non-isolated power supplies significantly improve efficiency, but there is a risk of electric shock. Separate dimming methods can no longer meet the requirements, and more intelligent dimming methods are needed. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a 0-10V dimming non-isolated high-voltage output power supply compatible with NFC function to solve the technical problems in the prior art that "non-isolated power supplies significantly improve efficiency, but there is a risk of electric shock. Separate dimming methods can no longer meet the requirements, and more intelligent dimming methods are needed".

[0004] To achieve the above objectives, the utility model is realized through the following technical solutions:

[0005] A 0-10V dimming non-isolated high-voltage output power supply compatible with NFC function, the power supply includes: EMI circuit, three-terminal sampling integrated circuit, input electromagnetic interference circuit, damping discharge circuit, lightning protection circuit, full-wave rectifier circuit, BOOST circuit, BUCK circuit, LDO circuit, single-chip microcomputer dimming circuit, relay circuit and NFC circuit. The output end of the full-wave rectifier circuit is connected to the BOOST circuit, and the output end of the BOOST circuit is connected to the LDO circuit. The LDO circuit, BUCK circuit, single-chip microcomputer dimming circuit, NFC circuit and relay circuit are connected in sequence.

[0006] As a preferred technical solution of the utility model, the EMI circuit is used to filter out part of the power grid interference, and the full-wave rectifier circuit converts alternating current into pulsating direct current.

[0007] As a preferred technical solution of the utility model, the input ends of each part of the circuit such as the BOOST circuit, BUCK circuit, single-chip microcomputer circuit and dimming circuit are externally connected to a VCC power supply of 12V.

[0008] The utility model provides a 0-10V dimming non-isolated high-voltage output power supply compatible with NFC function, which has the following beneficial effects:

[0009] After passing through the EMI circuit, it supplies power to the BOOST, BUCK, microcontroller circuit, and dimming circuit to achieve 0-10V dimming. The output is equipped with a relay and overvoltage detection, which improves the safety of the non-isolated power supply and reduces the risk of electric shock. It has an NFC dimming function, increasing the diversity of dimming and also enhancing the dimming fineness. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is the flowchart of the operation of this utility model;

[0011] Figure 2 is the circuit diagram of this utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] The following further describes in detail the embodiments of this utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate this utility model, but cannot be used to limit the scope of this utility model. In the description of this utility model, unless otherwise specified, the meaning of "a plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of this utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0013] Embodiment

[0014] Refer to Figure 1 , a 0-10V dimming non-isolated high-voltage output power supply compatible with NFC function, the power supply includes: EMI circuit, three-terminal sampling integrated circuit, input electromagnetic interference circuit, damping discharge circuit, lightning protection circuit, full-wave rectification circuit, BOOST circuit, BUCK circuit, LDO circuit, microcontroller dimming circuit, relay circuit and NFC circuit,

[0015] The input end of the lightning protection circuit is connected to the mains electricity and the output end is connected to the EMI circuit. The output end of the EMI circuit is connected to the damping discharge circuit. The output end of the damping discharge circuit is connected to the full-wave rectification circuit. The output end of the full-wave rectification circuit is connected to the Π-shaped filter circuit. The output end of the Π-shaped filter circuit is connected to the BOOST circuit. The output end of the BOOST circuit is connected to the LDO circuit. The output end of the LDO circuit is respectively connected to the BUCK circuit, the microcontroller dimming circuit, and the NFC circuit. The output end of the BUCK circuit is respectively electrically connected to the relay circuit and the three-terminal sampling integrated circuit. The output ends of the relay circuit and the NFC circuit are jointly connected to the LED output circuit;

[0016] Among them, the EMI circuit is used to filter out part of the power grid interference, and the full-wave rectifier circuit converts alternating current into pulsating direct current.

[0017] Among them, the input ends of each part of the circuit such as the BOOST circuit, the BUCK circuit, the single-chip microcomputer circuit, and the dimming circuit are externally connected to the VCC power supply of 12V.

[0018] The working principle of the present utility model: The input end of this circuit is connected to the 220VAC commercial power. After passing through the EMI circuit, it supplies power to the BOOST, BUCK, single-chip microcomputer circuit, and dimming circuit to achieve 0-10V dimming. The output is equipped with a relay and overvoltage detection, which improves the safety of the non-isolated power supply. It has an NFC dimming function, increases the diversity of dimming, and also improves the dimming fineness.

[0019] Reference Figure 2 , the input end is connected to the commercial power, passes through the lightning protection circuit and is connected to the EMI circuit and the damping discharge circuit, and then passes through the rectifier circuit to rectify the alternating current into direct current. At the same time, through the LDO circuit, the chip U102 works, and the VCC power supply starts the circuit to work, providing a stable VCC voltage. At this time, the capacitor CE103 supplies power to the PFC circuit, the BUCK circuit, and the dimming circuit respectively. When each part of the circuit works, the inductor L1 and T102 induce electromotive force, adjust the output voltage through the 3rd pin of U201, adjust the current through the 6th pin, the output is connected to a capacitor CE201 for filtering, and then connected to a 12V normally closed relay after output. After power-on, the normal output is obtained. When it is detected that the output voltage is high under no-load, the daughter board gives a high level to PWM2, and the relay works, so that the power supply output is cut off, preventing accidental contact with the output end and electric shock, which greatly improves the safety. During dimming, it is connected through NFC, and a PWM signal is given through U53. This signal is input to the U52 dimming chip through R69, and the fine adjustment of the output is realized by changing the signal of the GATE pin.

[0020] The current non-isolated power supply has low safety, high output voltage under no-load, and there is a risk of electric shock. This design turns off the output voltage by closing the relay when the power supply is under no-load, avoiding this risk. At the same time, it is compatible with the 0-10V dimming of NFC, meeting the user's requirements for the diversity and accuracy of dimming.

[0021] As described above, it is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model.

Claims

1. A 0-10V dimming non-isolated high-voltage output power supply compatible with NFC function, the power supply comprising: EMI circuit, three-terminal sampling integrated circuit, input electromagnetic interference circuit, damping discharge circuit, lightning protection circuit, full-wave rectifier circuit, BOOST circuit, BUCK circuit, LDO circuit, single-chip microcomputer dimming circuit, relay circuit and NFC circuit, characterized in that, The input end of the lightning protection circuit is connected to the mains electricity and the output end is connected to the EMI circuit, the output end of the EMI circuit is connected to the damping discharge circuit, the output end of the damping discharge circuit is connected to the full-wave rectifier circuit, the output end of the full-wave rectifier circuit is connected to the Π-shaped filter circuit, the output end of the Π-shaped filter circuit is connected to the BOOST circuit, the output end of the BOOST circuit is connected to the LDO circuit, the output end of the LDO circuit is respectively connected to the BUCK circuit, the single-chip microcomputer dimming circuit and the NFC circuit, the output end of the BUCK circuit is respectively electrically connected to the relay circuit and the three-terminal sampling integrated circuit, and the output ends of the relay circuit and the NFC circuit are jointly connected to the LED output circuit.

2. The 0-10V dimming non-isolated high-voltage output power supply compatible with NFC function according to claim 1, characterized in that, The EMI circuit is used to filter out some grid interferences, and the full-wave rectifier circuit converts the alternating current into pulsating direct current.

3. A 0-10V dimming non-isolated high-voltage output power supply compatible with NFC function according to claim 1, characterized in that, The input ends of each part of the circuit such as the BOOST circuit, the BUCK circuit, the single-chip microcomputer circuit and the dimming circuit are externally connected to the VCC power supply of 12V.

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