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Excitation type large-current LED constant switching stabilized power source

A technology of switching regulated power supply and high current, which is applied in the direction of electric light source, electric lamp circuit layout, light source, etc. It can solve the problems of large ripple coefficient, radio frequency interference, and low efficiency, so as to increase the carrying current and reduce radio frequency interference. broad effect

Inactive Publication Date: 2015-03-25
CHENGDU COPOO TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of large ripple coefficient, serious radio frequency interference, complex circuit and low efficiency existing in the current switch-type regulated power supply, and to provide an excitation-type high-current LED constant switch regulated power supply

Method used

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  • Excitation type large-current LED constant switching stabilized power source

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Embodiment

[0020] Such as figure 1 As shown, the non-linear negative feedback large current LED constant switching regulated power supply of the present invention includes a diode rectifier U, a power amplifier P1, a transformer T, a voltage comparator U1, a switching filter circuit, a power supply output circuit, and a variable voltage feedback circuit , Non-linear negative feedback circuit, current detection amplifier circuit, ramp generator, slope compensator M, oscillator, sliding regulator and beam-excited logic amplifier circuit. Wherein, the transformer T is composed of a primary coil L1 disposed on the primary side, a secondary coil L2 disposed on the secondary side, and a secondary coil L3 disposed on the secondary side. In the present invention, a sliding tap is provided on the primary coil L1 of the transformer T, and the sliding tap is controlled by a sliding regulator to ensure that the present invention can automatically adjust the primary coil L1, the secondary coil L2 and...

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Abstract

The invention discloses an excitation type large-current LED constant switching stabilized power source. The excitation type large-current LED constant switching stabilized power source is mainly composed of a diode rectifier U, a power amplifier P1, a transformer T, a voltage comparator U1, a switch filter circuit, a power output circuit, a voltage transformation feedback circuit, a nonlinear negative feedback circuit, a current detection amplifier circuit and the like, wherein the switch filter circuit is connected between the positive electrode output end of the diode rectifier U and the same-phase end of the power amplifier P1 in series, the power output circuit is connected with a secondary-side coil L2 of the transformer T, the voltage transformation feedback circuit is connected with a secondary-side coil L3 of the transformer, the nonlinear negative feedback circuit is connected with the voltage transformation feedback circuit, the input end of the current detection amplifier circuit is connected with the negative electrode output end of the diode rectifier U, and the output end of the current detection amplifier circuit is connected with the R end of the voltage comparator U1. According to the excitation type large-current LED constant switching stabilized power source, current detection is achieved through the current detection amplifier circuit, the borne current of the switching stabilized power source can be effectively increased, and the application range of the power source can be accordingly wider.

Description

technical field [0001] The invention relates to a switching and stabilizing power supply, in particular to an excitation-type high-current LED constant switching and stabilizing power supply. Background technique [0002] With the continuous advancement of science and technology, electronic products have brought great convenience to people's life while their functions are becoming more and more powerful. The voltage stabilizing circuit is easy to operate. The traditional series linear regulating voltage stabilizing circuit has the characteristics of high stability, adjustable output voltage, small ripple coefficient, and simple circuit. However, the adjustment tubes of these series linear adjustment type voltage stabilizing circuits always work in the amplified state, and current flows all the time, so the power consumption of the tubes is relatively large, and the efficiency of the circuit is not high, generally only reaching 30% to 50% %about. In order to overcome the ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 罗娅
Owner CHENGDU COPOO TECH
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