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Logic protection emitter coupling excitation type filtering amplification LED constant power supply

A technology of emitter coupling and logic protection, applied in the field of logic protection emitter coupling excitation filter amplification LED constant power supply, can solve problems such as large ripple coefficient, low efficiency, radio frequency interference, etc., achieve good filtering and amplification, improve The effect of carrying current and reducing radio frequency interference

Inactive Publication Date: 2015-10-07
CHENGDU LEIKEER SCI & TECH
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  • Summary
  • 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 a logic-protected emitter-coupled excitation type filter-amplified constant power supply for LEDs

Method used

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  • Logic protection emitter coupling excitation type filtering amplification LED constant power supply
  • Logic protection emitter coupling excitation type filtering amplification LED constant power supply
  • Logic protection emitter coupling excitation type filtering amplification LED constant power supply

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Embodiment

[0029] Such as figure 1 As shown, the present invention includes a diode rectifier U, a power amplifier P1, a transformer T, a voltage comparator U1, a switch filter circuit, a power supply output circuit, a voltage transformation feedback circuit, a nonlinear negative feedback circuit, a current detection amplifier circuit, and a ramp wave generation device 40 , slope compensator M, oscillator 30 , slide regulator 50 , beam excitation logic amplifier circuit, filter amplifier circuit 10 and logic protection emitter coupled amplifier circuit 20 . 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...

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Abstract

The invention discloses a logic protection emitter coupling excitation type large-current LED constant power source. The 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 connected between the output end of the positive electrode of the diode rectifier U and the in-phase end of the power amplifier P1 in series, a power output circuit connected with a secondary side coil L2 of the transformer T and the like. The power source is characterized by being further provided with a light beam excitation type logic amplifying circuit connected with the diode rectifier U, a slope compensator M and a current detection amplifier circuit and a logic protection emitter coupling amplifying circuit connected between a ramp generator and an oscillator in series. According to the power source, current detection is achieved through the current detection amplifier circuit, the loaded current of the switching power source can be effectively increased, and the application range of the power source is widened.

Description

technical field [0001] The invention relates to a switch stabilized voltage power supply, in particular to a logic protection emitter coupling excitation filter amplification constant power supply for LEDs. 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 regulator 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 o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 黄涛
Owner CHENGDU LEIKEER SCI & TECH
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