Radiation-resistant low-harmonic LED drive circuit and LED lamp

Abstract

The invention provides an irradiation-resistant low-harmonic LED drive circuit. The irradiation-resistant low-harmonic LED drive circuit comprises a rectification unit and a drive unit. The input end of the rectifying unit is connected with an external power supply, and the output end is connected with the driving unit and used for rectifying and filtering the external power supply to obtain a direct-current power supply and outputting the direct-current power supply to the driving unit. The driving unit is used for converting the voltage of the direct-current power supply into the working voltage of the LED light source, the driving unit comprises a first chip SM2315, a first capacitor and a second resistor, a first pin of the first chip SM2315 is connected with the output end of the rectifying unit, a second pin and a ninth pin of the first chip SM2315 are grounded, a third pin of the first chip SM2315 is grounded after being connected with the first capacitor, and a fourth pin of the first chip SM2315 is grounded after being connected with the second capacitor. The fourth pin is connected with a second resistor and then is grounded, and the eighth pin, the seventh pin, the sixth pin and the fifth pin are used for being connected with an LED light source. Correspondingly, the invention further provides an LED lamp. The LED drive circuit can effectively tolerate the radiation dose in the lamp life, and meets the requirements of life and power distribution.

Description

Technical field [0001] The present invention relates to the field of lighting technology, particularly, to a radiation resistant low harmonic LED driving circuit and LED lamps. Background technique [0002] Nuclear Power Plant of the presence of high energy ray radiation contaminated area, LED (Light-Emitting Diode, LED) driving circuit when the digital integrated circuit chips, LED drive circuit after the irradiation at a dose effect will be reached damage, leading to lamp failure. [0003] Currently, the driving circuit radiation resistant shielding material employed as a heavy metal such as lead, protect the circuit from radiation damage, but the method enables a substantial increase in the weight of the lamp, the lamp also need some irradiation seismic resistance, increased weight of the fixture to fixture seismic qualification and fixed a challenge. A flexible lead-free or with radiation shielding material, however, such new technology maturity lower material cost is high. T...

AI Technical Summary

Problems solved by technology

[0002] There are high-energy rays in nuclear radiation pollution areas of nuclear power plants. If the LED (Light-Emitting Diode, light-emitting diode) drive circuit uses a digital integrated circuit chip, the LED drive circuit will be damaged after the radiation reaches a certain dose, which will cause the lamp to malfunction.

[0003] At present, the radiation-resistant driving circuit uses heavy metals such as lead as shielding materials to protect the circuit from radiation damage. However, this method greatly increases the weight of the lamp. Some radiation-resistant lamps also need to be earthquake-resistant. and installation and fixation pose challenges

Or use flexible lead-free radiation shielding materials, but these new materials have low technological maturity and high cost

Or adopt the method of separately arranging the circuit and the light source, for example, arranging the parts with weak radiation resistance such as the circuit in the low-irradiation area, but this arrangement method makes it difficult to install the lamps

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