Direct current voltage power supply lighting circuit

Abstract

The invention discloses a direct current voltage power supply lighting circuit comprising a bridge rectifier U1, a resistor R11, a triode V2, a potentiometer RP1 and a resistor R5, wherein the voltage input end of the bridge rectifier U1 is connected with an alternating current electric supply, the positive voltage output end of the bridge rectifier U1 is connected with the resistor R11, the other end of the resistor R11 is connected with the collector of the triode V2, the collector of the triode V3 is connected with the drain of a field effect transistor V1, and the source of the field effect transistor V1 is connected with the grid of the field effect transistor V1, the resistor R1, a capacitor C1, a capacitor C2, the collector of the triode V4 and the collector of the triode V5. According to the direct current voltage power supply lighting circuit provided by the invention, basic electronic elements are used for forming a voltage stabilization module, a differential amplification module and a cascade amplification module; a stable big voltage output is provided for a lighting lamp, meanwhile a function of overcurrent protection is provided, and the lamp is prevented from being damaged by overcurrent; and therefore, the circuit has the advantages of being diverse in function, convenient to use and stable in performance.

Description

technical field [0001] The invention relates to a lighting circuit, in particular to a lighting circuit powered by DC voltage. Background technique [0002] With the continuous improvement of people's living standards, electronic equipment has become an indispensable part of life, especially various household appliances have brought great convenience to people's life and work, such electronic devices using DC power supply are all A power converter with higher precision and higher current is required. Especially for the field of lighting, lighting is one of the most widely used applications of electric energy by human beings. There are various types of lighting equipment in the existing market, especially low-end products. Although low-end products have a price advantage over high-end products, their quality is often inferior as you wish. Moreover, most of the existing DC lighting equipment cannot provide high-voltage DC output due to the low output voltage, so the brightne...

AI Technical Summary

Problems solved by technology

Especially for the field of lighting, lighting is one of the most widely used applications of electric energy by human beings. There are various types of lighting equipment in the existing market, especially low-end products. Although low-end products have a price advantage over high-end products, their quality is often inferior do what you want

Moreover, most of the existing DC lighting equipment cannot provide a high-voltage DC output due to the low output voltage, so the brightness of the lighting equipment is low and cannot provide sufficient illuminance

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