Blue light LED lamp protection system with amplification type field intensity detection circuit

Abstract

The invention discloses an excitation type blue light LED lamp protection system. The excitation type blue light LED lamp protection system is characterized by being mainly composed of a gate drive circuit, a logical control circuit, a power amplifier P1, a power amplifier P2, a pulse comparator U1, a pulse comparator U2, a field-effect tube MOS1, a field-effect tube MOS2, a field-effect tube MOS3, a field-effect tube MOS4 and an oscillator, wherein the power amplifier P1 and the power amplifier P2 are connected with the logical control circuit, the pulse comparator U1 and the pulse comparator U2 are connected with the logical control circuit, gates of the field-effect tube MOS1, the field-effect tube MOS2, the field-effect tube MOS3 and the field-effect tube MOS4 are connected with the gate drive circuit, and the oscillator is connected between the negative pole input end of the pulse comparator U1 and the negative pole input end of the pulse comparator U2 in series. The excitation type blue light LED lamp protection system has the short circuit protection function, the overvoltage protection function and the open circuit protection function, and the power consumption of the excitation type blue light LED lamp protection system is quite low and is only one third of the power consumption of a traditional protection circuit. According to the excitation type blue light LED lamp protection system, as a switching current source is arranged, the electricity demand of a protection circuit can be guaranteed, external electromagnetic interference can be effectively avoided, and the control sensitivity and the control accuracy can be improved.

Description

technical field [0001] The invention relates to an LED protection circuit, in particular to a blue LED lamp protection system of an amplified field strength detection circuit. Background technique [0002] At present, due to the characteristics of low energy consumption, long service life, safety and environmental protection, LED lamps have become one of the mainstream products for people's living lighting. Since LED lamps are different from traditional incandescent lamps, they need to be driven by a dedicated drive circuit, so there are various protection systems on the market to prevent the drive system from being interfered by internal or external adverse factors. [0003] Although most of these protection systems have short-circuit protection functions and overheat protection functions, the structures of these protection systems are often relatively complicated, and their maintenance is relatively difficult. At the same time, the energy consumption of these protection s...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of complex structure, high energy consumption, and poor overall protection in the current LED lamp protection system, and provide an amplified field strength detection circuit with over-current protection and over-temperature protection functions blue light LED light protection system

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