Performance comparison between incandescent lamp and white LED

1. General LED is a solid-state light source. When a forward voltage is applied at both ends, the minority carriers and the majority carriers in the semiconductor compound, and the excess energy released will cause photon emission. Light emitting diodes with different colors can be made of different materials. As a new light source, the […]

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Design and principle of practical optical fiber LED driving circuit

In developing an array signal processing system, because the array antenna must be placed in the open area around and the array signal processing unit is located in the center of the circular display antenna, it is necessary to carry out duplex communication between the array signal processing unit and the microcomputer located 1 ~ […]

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LED driving circuit design of ansenmey ncpiolx series switching power supply

1 Introduction The development of ultra-high brightness light emitting diodes (LEDs) is more rapid than previously expected. More than ten years ago, LEDs with luminous intensity reaching or exceeding 100 candela (CD) were defined as ultra-high brightness LEDs, while the current level has already exceeded 1300 CD. A few years ago, the working current of […]

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Surge protection design of LED driving circuit

LED is very popular in the market because of its high efficiency and low energy consumption. Therefore, it is widely used in display lighting, signal indicator and other fields. However, the wide range of application fields also challenges the environmental adaptability of LED itself. When working outdoors, the driving circuit of LED is very vulnerable […]

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Design of LED driving circuit based on junction temperature protection

Long service life and high efficiency are preconditions, that is, appropriate working conditions. The main factor affecting the lifetime and luminous efficiency is the working junction temperature of LED. The test data provided by mainstream LED manufacturers show that the luminous efficiency of LED is almost inversely proportional to the junction temperature, and the life […]

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Driving design of LED brightness control based on DC / DC boost converter

1 Introduction LED has been widely used in lighting, backlight and other fields because of its low power consumption, high luminous efficiency and long service life. The brightness of LED is directly proportional to the working current. In order to maintain the stability of brightness, a stable constant current power supply is needed. In terms […]

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Design of non isolated LED driving circuit based on a high power factor

introduction As an emerging industrial technology, LED lighting is constantly developing a wider range of applications. For AC power input applications, switching power supply based on flyback topology is usually used at present. Flyback topology switching power supply includes input rectifier filter circuit, switch control circuit, isolation transformer and secondary rectifier filter circuit. However, the […]

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Design of thyristor dimming LED driving circuit with multiple lamps in parallel

1、 Overview LED bulb has excellent energy efficiency and long service life. It is considered by the market as a powerful substitute for incandescent lamp and compact fluorescent lamp. However, at present, the main obstacles affecting large-scale adoption come from the relatively expensive procurement cost and the dimming compatibility problem like compact fluorescent lamps. For […]

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Design of LED driving power supply based on LLC Resonant Converter

1 Introduction As a new light source in the 21st century, semiconductor lighting has the advantages of energy saving, environmental protection, long service life and easy maintenance. It is the general trend to replace incandescent lamp, fluorescent lamp and other traditional lighting sources with high power and high brightness LED. Due to its own characteristics, […]

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