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A single-chip microcomputer power switch to brighten an LED light switching power supply and its control method

A switching power supply and LED lamp technology, applied in the field of lighting brightness control and household appliance control, to achieve the effect of convenient operation, few peripheral components and simple structure

Inactive Publication Date: 2019-03-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are almost no dedicated IC chips for this kind of control, especially those that require perfect functions.

Method used

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  • A single-chip microcomputer power switch to brighten an LED light switching power supply and its control method
  • A single-chip microcomputer power switch to brighten an LED light switching power supply and its control method
  • A single-chip microcomputer power switch to brighten an LED light switching power supply and its control method

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Embodiment

[0040] The present invention adds single-chip microcomputer and can't do without supplying power to the single-chip microcomputer, and the voltage of the single-chip microcomputer requires 3 to 5V, so from Figure 1 to Figure 6 , the power supply end 4 of the single-chip microcomputer (that is, the input end of the step-down regulator) is connected to the positive pole of each power supply that is higher than 5V but relatively close to 5V (there are also separate windings for separate power supply, for some additional functions or useful There are more indicator lights 3 and beeping buzzers), and the power-taking terminal 4 of the single-chip microcomputer is unidirectionally powered to the single-chip microcomputer through the diode D after stepping down and stabilizing the voltage. The so-called step-down voltage regulator is commonly used as a three-terminal voltage regulator, such as 78L05, 7550, 7144, AMS1117. It is simpler and may be connected in series with a resistor co...

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Abstract

The invention discloses a single-chip microcomputer power switch to brighten an LED lamp switching power supply and a control method thereof. The LED lamp switching power supply is adjusted through the power switch, which mainly consists of a switching power supply, a single-chip computer, a diode D, a capacitor C, a resistor R, and a PWM smoothing filter capacitor Composed of C0; the positive pole of the LED light power output by the switching power supply is connected to the power supply terminal of the single-chip microcomputer, and the power supply terminal of the single-chip microcomputer is connected to the positive pole of the diode D after being stepped down and regulated, and the negative pole of the diode D and the positive terminal of the capacitor C are connected to the positive pole of the single-chip microcomputer power supply ; The PWM output port of the microcontroller is connected to one end of the resistor R, and the other end of the resistor R and one end of the capacitor C0 are connected to the comparator TL431 or the FB pin or an optocoupler isolation device. The invention fully explores the potential functions of the new single-chip microcomputer, and adds the single-chip microcomputer to the LED light switching power supply in an extremely simplified manner to realize power switch and brightness adjustment, so that the original ordinary light switch and circuit can be directly installed with adjustable brightness LED lights. , and still use the original ordinary light switch to adjust the brightness.

Description

technical field [0001] The invention relates to the fields of brightness control of illuminating lamps and control of household appliances, in particular to a single-chip microcomputer power switch to brighten an LED lamp switching power supply and a control method thereof. Background technique [0002] At present, the application and promotion of LED lamps are mainly to replace traditional lighting lamps, and most of them do not have the function of adjusting brightness, so they do not reflect the characteristics of energy saving and longevity of LED lamps in low-brightness conditions. Although the market also has LED lights with adjustable brightness, the operation panel installation or remote control to adjust the brightness adds complexity. [0003] Only an ordinary power switch is used to adjust the brightness of the lamp or the wind speed of the electric fan. It has a simple structure and is easy to install. It does not need to modify the original circuit on the wall o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/37Y02B20/30
Inventor 金隐华刘恩茂吴非逸
Owner ZHEJIANG UNIV
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