Filtering amplification-type overvoltage protection circuit-based LED dimming driving system

An overvoltage protection circuit and dimming drive technology, which is applied in the field of drive systems, can solve the problems of LED light sources that cannot be dimmed, achieve stable brightness, filter out interference signals and unstable harmonic signals, and ensure stability.

Inactive Publication Date: 2018-02-16
CHENGDU YUEXIANGXIANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect that most of the LED light sources on the market cannot be adjusted, and provide a filter-amplified overvoltage protection circuit that not only has a simple structure, but also can be adjusted to meet people's individual needs. LED dimming drive system

Method used

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  • Filtering amplification-type overvoltage protection circuit-based LED dimming driving system
  • Filtering amplification-type overvoltage protection circuit-based LED dimming driving system
  • Filtering amplification-type overvoltage protection circuit-based LED dimming driving system

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Embodiment

[0023] Such as figure 1 As shown, the LED dimming driving system based on the filtering and amplifying overvoltage protection circuit of the present invention is mainly composed of a driving chip U1, a resistor R5, a resistor R6, a capacitor C4, a diode D1, a diode D3, a field effect tube power circuit, and an emitter Drive enhancement circuit, filter amplifier circuit, overvoltage protection circuit and triode drive circuit. Specifically, the P pole of the diode D1 is connected to the TRIAC pin of the driver chip U1 through the resistor R5, and its N pole is connected to the VCC pin of the driver chip U1. The FET power supply circuit is respectively connected to the P pole of the diode D1 and the DIM pin of the driving chip U1. The P pole of the diode D3 is connected to the DIM pin of the driver chip U1 through the resistor R6 and the filter amplifier circuit sequentially, and its N pole is connected to the GATE pin of the driver chip U1. The triode drive circuit is connect...

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Abstract

The invention discloses a filtering amplification-type overvoltage protection circuit-based LED dimming driving system. The filtering amplification-type overvoltage protection circuit-based LED dimming driving system is characterized by mainly comprising a driving chip U1, a resistor R5, a resistor R6, a capacitor C4, a diode D1, a diode D3, a field-effect transistor power circuit, an emitter driving reinforcement circuit, a filtering amplification circuit, an overvoltage protection circuit and a triode driving circuit. A BP3108 integrated chip is employed and a peripheral circuit is combined,the resistance change of a sliding rheostat RP can be controlled, so that the brightness of an LED light source can be adjusted according to demand, individual demand of people is satisfied, and thefiltering amplification-type overvoltage protection circuit-based LED dimming driving system is suitable for promotion and application.

Description

technical field [0001] The invention relates to a driving system, in particular to an LED dimming driving system based on a filter amplifying overvoltage protection circuit. Background technique [0002] With the development of society and the improvement of living standards, people's minds have also been fully liberated. Nowadays, people are very individualized, have their own unique insights into the cognition of objects, and have different needs for things. Similarly, the sensitivity to light is not necessarily the same. Moreover, due to the increasing abundance of electronic products, people's excessive eye use is becoming more and more serious, and the degree of damage to the eyes is different, and the sensitivity to light is also different. Most of the LED light sources currently on the market cannot be dimmed, so they cannot meet people's individual needs. Contents of the invention [0003] The purpose of the present invention is to overcome the defect that most o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/50H05B45/395H05B45/10Y02B20/30
Inventor 王青松
Owner CHENGDU YUEXIANGXIANG TECH CO LTD
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