CN219124400U

CN219124400U - Dimming power supply for respectively adjusting output voltage or PWM (pulse width modulation) by two paths of dimming signals

Info

Publication number: CN219124400U
Application number: CN202223283415.3U
Authority: CN
Inventors: 赵显云
Original assignee: Zhuhai Shengchang Electronics Co ltd
Current assignee: Zhuhai Shengchang Electronics Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-06-02
Anticipated expiration: 2032-12-08

Abstract

The utility model provides a dimming power supply for respectively adjusting output voltage or PWM by two paths of dimming signals, which comprises the following components: the device comprises an electromagnetic filter circuit, a switching power supply main control circuit, a transformer, a rectification filter circuit, a feedback regulation loop, a first dimming signal processing circuit, a second dimming signal processing circuit, a PWM driving circuit and an MOS tube; the electromagnetic filter circuit, the switching power supply main control circuit, the transformer and the rectification filter circuit are sequentially connected, and the output end of the rectification filter circuit is respectively connected with the positive pole of the lamp and the feedback regulation loop; the feedback regulation loop is also respectively connected with the switching power supply main control circuit and the first dimming signal processing circuit; the PWM driving circuit is respectively connected with the second dimming signal processing circuit and the grid electrode of the MOS tube; the drain electrode of the MOS tube is connected with the negative electrode of the lamp. The utility model has two dimming modes and two output modes, can realize the dimming without stroboflash and noise, and can realize synchronous dimming by connecting lamps with various colors and color temperatures.

Description

Dimming power supply for respectively adjusting output voltage or PWM (pulse width modulation) by two paths of dimming signals

Technical Field

The utility model relates to the technical field of dimming power supplies, in particular to a dimming power supply with two paths of dimming signals for respectively adjusting output voltage or PWM.

Background

The LED lighting has become mainstream lighting, meanwhile, along with the improvement of living standard, there are more and more demands for dimmable LED lighting, and dimming power supplies with multiple dimming modes appear on the market to control the brightness or color temperature and color of the LED lamp.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide a dimming power supply with two paths of dimming signals for respectively adjusting output voltage or PWM.

In order to achieve the above object, the present utility model provides the following solutions:

a dimming power supply for respectively adjusting output voltage or PWM by two dimming signals, comprising:

the device comprises an electromagnetic filter circuit, a switching power supply main control circuit, a transformer, a rectification filter circuit, a feedback regulation loop, a first dimming signal processing circuit, a second dimming signal processing circuit, a PWM driving circuit and an MOS tube;

the electromagnetic filter circuit, the switching power supply main control circuit, the transformer and the rectifying filter circuit are sequentially connected, and the output end of the rectifying filter circuit is respectively connected with the positive pole of the lamp and the feedback regulation loop; the feedback regulation loop is also respectively connected with the switching power supply main control circuit and the first dimming signal processing circuit; the PWM driving circuit is respectively connected with the second dimming signal processing circuit and the grid electrode of the MOS tube; and the drain electrode of the MOS tube is connected with the negative electrode of the lamp.

Preferably, the electromagnetic filter circuit is connected with a live wire and a zero wire of the commercial power respectively.

Preferably, the rectifying and filtering circuit and the MOS tube are both connected with the ground.

According to the specific embodiment provided by the utility model, the utility model discloses the following technical effects:

the utility model provides a dimming power supply for respectively adjusting output voltage or PWM by two paths of dimming signals, which comprises the following components: the device comprises an electromagnetic filter circuit, a switching power supply main control circuit, a transformer, a rectification filter circuit, a feedback regulation loop, a first dimming signal processing circuit, a second dimming signal processing circuit, a PWM driving circuit and an MOS tube; the electromagnetic filter circuit, the switching power supply main control circuit, the transformer and the rectifying filter circuit are sequentially connected, and the output end of the rectifying filter circuit is respectively connected with the positive pole of the lamp and the feedback regulation loop; the feedback regulation loop is also respectively connected with the switching power supply main control circuit and the first dimming signal processing circuit; the PWM driving circuit is respectively connected with the second dimming signal processing circuit and the grid electrode of the MOS tube; and the drain electrode of the MOS tube is connected with the negative electrode of the lamp. The utility model has two dimming modes and two output modes, can realize the dimming without stroboflash and noise, and can realize synchronous dimming by connecting lamps with various colors and color temperatures.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a circuit according to an embodiment of the present utility model;

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The terms "first," "second," "third," and "fourth" and the like in the description and in the claims of this application and in the drawings, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, inclusion of a list of steps, processes, methods, etc. is not limited to the listed steps but may alternatively include steps not listed or may alternatively include other steps inherent to such processes, methods, products, or apparatus.

The utility model aims to provide a dimming power supply with two paths of dimming signals for respectively adjusting output voltage or PWM, which has two dimming modes and two output modes, can realize strobe-free and noise-free dimming, and can realize synchronous dimming even when being connected with lamps with various colors and color temperatures.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

Fig. 1 is a schematic circuit diagram provided by the embodiment of the utility model, as shown in fig. 1, an input end of the utility model is connected with a mains supply, the mains supply is filtered by an electromagnetic filter circuit 1 after passing through the input end and then is input into a switch power supply main control circuit 2, the switch power supply main control circuit 2 and a transformer T1 convert energy into a secondary of the transformer T1, and the energy is rectified and filtered by a rectifying and filtering circuit 3 to be converted into working voltage required by an LED lamp. The rectifying and filtering circuit 3 is connected with the positive pole V+ of the lamp.

When the lamp needs to be matched with the dimming operation of the voltage-regulating mode, an external dimmer is connected to the interface of the dimming signal 1, the dimming signal is input to the first dimming signal processing circuit 4, a reference signal which changes along with the dimming signal is processed and output to the feedback regulating circuit 4, the feedback regulating circuit 4 simultaneously samples the output voltage and compares the output voltage with the reference signal, and the output control signal is output to the switching power supply main control circuit 2 to regulate the output voltage, so that the brightness of the lamp is regulated, the output voltage changes along with the change of the reference signal, and therefore the output voltage also changes along with the change of the dimming signal.

When the lamp needs to be matched with the dimming operation of the PWM mode, an external dimmer is connected to the interface of the dimming signal 2, the dimming signal is input to the second dimming signal processing circuit 6, the corresponding PWM signal is processed and converted and output, the PWM signal is input to the PWM driving circuit 7, the switching time of the MOS tube Q1 is controlled after amplification, and the power supply is output in a PWM mode, so that the brightness of lamplight is regulated. The drain electrode of the MOS tube Q1 is connected with the negative electrode V-of the lamp.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.

The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present utility model and the core ideas thereof; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.

Claims

1. A dimming power supply for respectively adjusting output voltage or PWM by two dimming signals, comprising:

2. The two-way dimming signal respectively adjusting output voltage or PWM dimming power supply according to claim 1, wherein the electromagnetic filter circuit is respectively connected with a live wire and a zero wire of the mains supply.

3. The two-way dimming signal adjusting output voltage or PWM dimming power supply according to claim 1, wherein the rectifying and filtering circuit and the MOS transistor are both connected to ground.