CN220606122U - Low-voltage color temperature adjusting module circuit adapting to isolated power supply - Google Patents

Abstract

The utility model discloses a low-voltage color temperature adjusting module circuit adapting to an isolated power supply, which comprises a first resistor, a second resistor and a third resistor, wherein the first resistor, the second resistor and the third resistor are connected with an LED, the third resistor is further connected with a single chip microcomputer with a pin of a conversion module, the 4 pin and the 6 pin of the single chip microcomputer respectively generate a first PWM signal and a second PWM signal, the first PWM signal and the second PWM signal respectively pass through a fourth resistor and a fifth resistor and then are respectively connected with a first MOS tube and a second MOS tube, the first MOS tube and the second MOS tube are respectively connected with a first lamp bead and a second lamp bead, and the gear of the single chip microcomputer is at least provided with 5 gears. The utility model solves the problems that the color temperature adjusting circuit in the prior art is not suitable for high-power adjustment, is easy to deviate and has lower efficiency.

Description

Low-voltage color temperature adjusting module circuit adapting to isolated power supply

Technical Field

The utility model relates to the field of color temperature adjusting circuits, in particular to a low-voltage color temperature adjusting module circuit adaptive to an isolated power supply.

Background

The existing color temperature adjustment mode is generally realized by three modes: a group of resistors are connected in series in the lamp beads to divide the voltage so as to realize the brightness of the lamp beads, and then the lamp beads with different color temperatures are used for realizing color temperature adjustment; a group of resistors are connected in series in the lamp beads to split the brightness of the lamp beads, and then the lamp beads with different color temperatures are used for realizing color temperature adjustment; mixing colors through two different lamp beads; to realize color temperature adjustment.

However, the current color temperature adjustment mode has the following defects: the resistor is not suitable for high-power color temperature adjustment, and for high current, the resistance temperature can be increased sharply; the color temperature shifts with the temperature rise of the resistor; the color temperature matching proportion process is complex, time consuming is long, and efficiency is low.

Disclosure of Invention

The technical scheme aims to solve one of the technical problems in the related technology at least to a certain extent. Therefore, the main purpose of the present utility model is to provide a low-voltage temperature-adjusting module circuit adapted to an isolated power supply, which aims to solve the problems that the temperature adjusting mode in the prior art is not suitable for high-power adjustment, and is easy to deviate and has low efficiency.

In order to achieve the above purpose, the utility model provides a low-voltage temperature-adjusting module circuit adapting to an isolated power supply, which comprises a first resistor, a second resistor and a third resistor connected with an LED, wherein the third resistor is further connected with a singlechip with a pin of a conversion module, the pins 4 and 6 of the singlechip respectively generate a first PWM signal and a second PWM signal, respectively pass through a fourth resistor and a fifth resistor and then are respectively connected with a first MOS tube and a second MOS tube, the first MOS tube and the second MOS tube are respectively connected with a first lamp bead and a second lamp bead,

wherein, the singlechip gear is equipped with 5 shelves at least.

As a still further scheme of the utility model, a linear voltage stabilizer is also connected between the third resistor and the singlechip.

As still further scheme of the present utility model, a filter capacitor is arranged between the linear voltage stabilizer and the third resistor.

As a still further scheme of the utility model, the singlechip and the linear voltage stabilizer are also provided with at least two filter capacitors, and the output voltage of the linear voltage stabilizer is 5V.

As a still further scheme of the utility model, the 1-5 gears of the singlechip are respectively that the PWM1 outputs 100% high level and the PWM2 does not output; PWM1 outputs 70% high level, PWM2 outputs 30% high level; PWM1 outputs 50% high level, PWM2 outputs 50% high level; PWM1 outputs 30% high level, PWM2 outputs 70% high level; PWM1 does not output and PWM2 outputs 100% high.

As a still further scheme of the utility model, the first MOS tube and the second MOS tube are respectively connected with a filter capacitor.

The beneficial effects of the utility model are as follows:

the low-voltage color temperature adjusting module circuit adapting to the isolated power supply provided by the utility model outputs two groups of complementary pwm waveforms to control the mos tube switch through the singlechip respectively, so that the functions of mixing the current of two groups of different lamp beads with the current to form different color temperatures are controlled. And the different color temperatures can be assembled and selected according to the requirements. The circuit structure is simple, and the dimming efficiency is high.

Drawings

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

Fig. 1 is a schematic circuit diagram of a temperature adjusting module according to the present utility model.

[ Main part/Assembly reference numerals Specification Table ]

Reference numerals	Name of the name	Reference numerals	Name of the name
				LED	LED	AD	Conversion module
R1	First resistor	C1-5	Filter capacitor
				R2	Second resistor	Q3	First MOS tube
R3	Third resistor	Q4	Second MOS tube
				R4	Fourth resistor	PWM1	First PWM signal
R5	Fifth resistor	PWM2	Second PWM signal
				U1	Linear voltage stabilizer	C-	First lamp bead
MCU	Singlechip microcomputer	W-	Second lamp bead

Detailed Description

The following are provided:

referring to fig. 1, the main structure includes a first resistor, a second resistor and a third resistor connected with an LED, the third resistor is further connected with a single chip microcomputer with a pin of a conversion module, the 4 pin and the 6 pin of the single chip microcomputer respectively generate a first PWM signal and a second PWM signal, and after passing through a fourth resistor and a fifth resistor respectively, the single chip microcomputer is respectively connected with a first MOS tube and a second MOS tube, the first MOS tube and the second MOS tube are respectively connected with a first lamp bead and a second lamp bead, wherein the gear of the single chip microcomputer is at least provided with 5 gears.

The working principle is as follows:

when the single module is powered on, the single chip can obtain about five volts of working voltage through a voltage reducing circuit. At this time, the single chip can generate two sets of complementary PWM signals according to the position of the shift, and the two sets of complementary PWM signals are given to the two sets of MOS, and the two sets of MOS respectively correspond to different color temperatures, so that the magnitude of current added on the two sets of lamp beads is changed, the color temperatures are mixed, and the function of wanting different color temperatures is achieved.

Specifically, as shown in FIG. 1, when the LED +/-is connected to a power supply, the voltage is divided by R1/R2/R3, and 5V voltage is output to the U1 to supply power to the MCU. When the MCU starts to work, according to the sampling voltage where the AD is located, delay is carried out for about 20us, a group of complementary PWM waveforms (first PWM signals and PWM2 signals) are generated from the 4 pins/6 pins of the MCU, and the complementary PWM waveforms pass through R5/R4 to the grid electrodes of the first MOS tube and the second MOS tube to perform a switching function on the MOS. The two capacitors of C5/C6 are added for eliminating peak voltage of MOS tube. The two groups of MOS tubes correspond to the lamp beads with two color temperatures, and each MOS tube controls the current of each group of lamp beads and is matched with the other group to be mixed into the desired color temperature.

In a preferred embodiment of the utility model: and a linear voltage stabilizer is also connected between the third resistor and the singlechip.

In a preferred embodiment of the utility model: a filter capacitor is arranged between the linear voltage stabilizer and the third resistor.

In a preferred embodiment of the utility model: the singlechip and the linear voltage stabilizer are also provided with at least two filter capacitors, and the output voltage of the linear voltage stabilizer is 5V.

In a preferred embodiment of the utility model: the single chip microcomputer 1-5 gear positions are respectively that the PWM1 outputs 100% high level, and the PWM2 does not output; PWM1 outputs 70% high level, PWM2 outputs 30% high level; PWM1 outputs 50% high level, PWM2 outputs 50% high level; PWM1 outputs 30% high level, PWM2 outputs 70% high level; PWM1 does not output and PWM2 outputs 100% high. When the singlechip dials a first gear, the PWM1 outputs 100% of high level, and the PWM2 does not output;

when the singlechip dials into a second gear, PWM1 outputs 70% of high level, and PWM2 outputs 30% of high level;

when the singlechip dials into three gears, PWM1 outputs 50% of high level, and PWM2 outputs 50% of high level;

when the singlechip dials into a fourth gear, PWM1 outputs 30% of high level, and PWM2 outputs 70% of high level;

when the singlechip dials into five gears, PWM1 does not output, and PWM2 outputs 100% high level.

In a preferred embodiment of the utility model: the first MOS tube and the second MOS tube are also respectively connected with a filter capacitor.

The foregoing is only a preferred embodiment of the technical solution of the present utility model, and is not intended to limit the scope of the technical solution of the present utility model, and all the equivalent structural changes made by the technical solution specification and the attached drawings or the direct/indirect application in other related technical fields are included in the scope of the technical solution of the present utility model.

Claims (6)

1. A low-voltage color temperature adjusting module circuit suitable for an isolated power supply is characterized by comprising

The first resistor, the second resistor and the third resistor are connected with the LED, the third resistor is further connected with a singlechip with pins of a conversion module, the 4 pins and the 6 pins of the singlechip respectively generate a first PWM signal and a second PWM signal, the first PWM signal and the second PWM signal respectively pass through a fourth resistor and a fifth resistor and then are respectively connected with a first MOS tube and a second MOS tube, the first MOS tube and the second MOS tube are respectively connected with a first lamp bead and a second lamp bead,

wherein, the singlechip gear is equipped with 5 shelves at least.

2. The low-voltage color temperature adjusting module circuit adapting to the isolated power supply according to claim 1, wherein a linear voltage stabilizer is further connected between the third resistor and the single chip microcomputer.

3. The low voltage palette temperature module circuit of claim 2 wherein a filter capacitor is provided between the linear voltage regulator and the third resistor.

4. The low voltage temperature adjusting module circuit for adapting to the isolated power supply according to claim 3, wherein the single chip microcomputer and the linear voltage stabilizer are further provided with at least two filter capacitors, and the output voltage of the linear voltage stabilizer is 5V.

5. The low-voltage color temperature adjusting module circuit adapting to the isolated power supply according to claim 1, wherein the single chip microcomputer 1-5 gears are respectively that PWM1 outputs 100% high level and PWM2 does not output; PWM1 outputs 70% high level, PWM2 outputs 30% high level; PWM1 outputs 50% high level, PWM2 outputs 50% high level; PWM1 outputs 30% high level, PWM2 outputs 70% high level; PWM1 does not output and PWM2 outputs 100% high.

6. The low-voltage temperature adjusting module circuit for adapting to the isolated power supply according to claim 1, wherein the first MOS tube and the second MOS tube are further connected with filter capacitors respectively.