DC power supply control circuit applied to multi-primary-color film and television lamp

Abstract

The invention discloses a DC power supply control circuit applied to a multi-primary color film and television lamp, which comprises a main control chip U6, and an input detection circuit, a conversion circuit, an output detection circuit, a working mode switching circuit, an input voltage control circuit and a chip working frequency control circuit which are respectively connected with the main control chip U6, the conversion circuit comprises a first conversion circuit and a second conversion circuit, the first conversion circuit is connected with a current detection circuit connected with the main control chip U6, the output detection circuit is connected with the main control chip U6 through a first feedback circuit and a second feedback circuit, and the output detection circuit is connected with an electric appliance power supply circuit. According to the invention, after different input voltages are converted, constant voltage output is carried out, the brightness of the lamp color is accurately controlled, the buck-boost function is realized, the accurate control of the output voltage in a PWM mode is supported, and the use of LED lamps with power of 50W, 100W and the like is supported.

Description

technical field [0001] The invention relates to a control circuit, in particular to a DC power supply control circuit applied to a multi-primary color video lamp. Background technique [0002] In the DC power supply of traditional multi-primary color video lights, the input voltage is generally greater than or less than the output voltage, and the output voltage cannot be accurately controlled, which makes it difficult to accurately control the brightness of the color of the lamp, the input voltage range is small, and the output voltage range is also small. Can not meet the use requirements of video lights, especially can not meet the use requirements of high-power video lights. Therefore, in order to avoid the disadvantages existing in the prior art, it is necessary to make improvements to the prior art. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to overcome the shortcomings and deficiencies in the prior art, and to provide a DC power suppl...

AI Technical Summary

Problems solved by technology

[0002] In the traditional DC power supply of multi-color film and television lamps, the input voltage is generally greater than or less than the output voltage, and the output voltage cannot be precisely controlled, which makes it difficult to accurately control the brightness of the lamp color. The input voltage range is small, and the output voltage range is also small. It cannot meet the requirements for the use of film and television lights, especially the requirements for the use of high-power film and television lights

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