Touch-control dimming LED power supply with memory function, and design method thereof

Abstract

The invention provides a touch-control dimming LED power supply with the memory function, and a design method thereof. The LED power supply comprises a rectifier starting circuit, a constant-current driving chip, a charging and power storage circuit, a compensation circuit, a voltage stabilizing circuit, a touch-control dimming chip and an LED light-emitting circuit. The rectifier starting circuitrectifies the 220V alternating-current voltage into the direct-current voltage and supplies the power to the constant-current driving chip so as to start the working of the constant-current driving chip. The constant-current driving chip supplies the power to the charging and power storage circuit. The charging and power storage circuit is used for charging and storing power so as to drive the LED light-emitting circuit in a to-be-driven state. The charging and power storage circuit is used for continuously supplying power to the constant-current driving chip based on the stable direct-current voltage outputted through the compensation circuit. Meanwhile, the charging and power storage circuit is also used for supplying power to the touch-control dimming chip based on the 5V direct-current voltage outputted through the voltage stabilizing circuit. According to the invention, the charging and power storage circuit is designed in a driving power supply, so that the power supply stability of the constant-current driving chip and the touch-control dimming chip in the touch-control dimming LED power supply is improved. The touch-control dimming LED power supply is simple in circuit structure, and realizes the brightness memory function. The use reliability and the stability of the touch-control dimming LED power supply are improved.

Description

technical field [0001] The invention relates to a touch dimming LED power supply with a memory function and a design method thereof, belonging to the technical field of LED circuits. Background technique [0002] LED is a semiconductor device that can directly convert electrical energy into light energy. It is different from the principle of incandescent lamp tungsten filament luminescence and energy-saving lamp three-based toner luminescence, but uses electric field luminescence. In modern society, due to the advantages of LEDs such as small size, long life, high luminous efficiency, no radiation and low power consumption, people are increasingly using LEDs as light sources for LED lamps. With more and more research on the touch dimming control circuit, LED dimmable power supply is also coming to the market. [0003] CN104869720A, relates to an adjustable LED lamp and its dimming method. The adjustable LED lamp includes a driving device and a lighting lamp connected to the...

AI Technical Summary

Problems solved by technology

[0005] The circuit structure of the actual memory function in the existing dimming circuit with memory function described above is complex, and the voltage stability needs to be improved.

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