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Radiation-resistant constant current source circuit with light source protection function

A technology of protection function and constant current source, which is applied in the field of power electronics to achieve the effect of stable and reliable constant current source circuit, reducing output current and power

Active Publication Date: 2022-08-09
WAROM TECH INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Based on the existing problems, the present invention provides a radiation-resistant constant current source circuit with light source protection function, aiming to solve the problem of how to protect the light source from excessive temperature

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  • Radiation-resistant constant current source circuit with light source protection function

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Embodiment Construction

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0046] It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but it is not intended to limit the present invention.

[0048] see figure 1 , the present invention provides a constant current source c...

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Abstract

The invention provides an irradiation-resistant constant current source circuit with a light source protection function, which comprises a first triode, a second triode, a third triode, a fourth triode and a fifth triode, the anode of the first voltage stabilizing diode is connected with the cathode of the voltage input end, and the cathode is connected with the base of the first triode; the base electrode of the second triode is connected with the emitting electrode of the first triode, the emitting electrode is connected with the negative electrode of the voltage input end, and the collector electrode is connected with the negative electrode of the light source; the first temperature switch is attached to the cooling fin, and the first end of the first temperature switch is connected with the emitter of the second triode; the second temperature switch is attached to the heat dissipation plate of the light source, the first end is connected with the second end of the first temperature switch, and the second end is connected with the negative electrode of the voltage input end. Over-temperature protection is carried out on the heating power element and the light source through the first temperature switch and the second temperature switch, and a stable and reliable constant current source circuit is provided.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a constant current source circuit with radiation resistance and light source protection function. Background technique [0002] The high-power constant current sources commonly used in the market are mostly designed with integrated circuit chips. In nuclear power plants, after the integrated circuit chips are irradiated, the control is easy to fail. How to provide a stable and reliable constant current power supply for the LED light source is required. solved problem. The conventional constant current source circuit has low output power and low light source temperature, and heat dissipation can be done through the aluminum plate. However, in high-power lamps, such as power above 600W, the temperature of the LED light source is high, and it is easily damaged when it exceeds 125 degrees Celsius. The constant current source circuit is to be able to provide a stable curren...

Claims

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Application Information

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IPC IPC(8): G05F1/56
CPCG05F1/56Y02B20/30
Inventor 李江王亚德周青唐树华刘保华冯晓花
Owner WAROM TECH INC
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