Design of white LED series circuit based on a high brightness

In order to drive more than one high brightness white LED, the design engineer needs to choose whether to connect the LED in series or in parallel. Of course, each connection will bring a compromise to the design. The parallel connection only needs to apply a lower voltage at both ends of each LED, but […]

Read More

Analysis of types and luminous principle of white LED

Development of white LED For general lighting, people need white light source more. In 1998, white LED was successfully developed. This led is made of Gan chip and yttrium aluminum garnet (YAG). Gan chip emitting blue light( λ P = 465nm, WD = 30nm), the YAG phosphor containing Ce3 + Prepared by high-temperature sintering emits […]

Read More

Structure and working principle analysis of white LED card lamp

LED is the abbreviation of light emitting diode. It is an electric light source made of semiconductor technology. The core of LED is a chip composed of p-type semiconductor and n-type semiconductor. There is a transition layer between p-type semiconductor and n-type semiconductor, called p2n junction. When conducting in the forward direction, most carriers and […]

Read More

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 […]

Read More

Circuit design of white LED emergency lighting

Unexpected temporary blackouts often plunge people into complete darkness. Whether it is a hospital, theater or home, this situation requires an automatic emergency lighting system. The preferred emergency lighting source is white LED, which is becoming popular as a compact and efficient alternative to incandescent lamps. D1 and D2 realize the rectification of AC voltage, […]

Read More

Driving design of white LED based on an 800KHz single ended primary inductive converter

Recently, the performance of white LED has been greatly improved. It can compress the extremely high luminous density in an ultra compact package. Compared with more traditional lighting devices, the latest White LED has many advantages, including improved spectral characteristics, shorter response time, higher brightness, stronger durability, longer life and smaller size. For example, Luxeon […]

Read More

How to realize digital dimming using tps6106x white LED driver

Tps6106x is a series of white LED drivers with perfect functions. It adopts the topology of synchronous rectification and does not need the rectifier diode connected outside the traditional white light driver, so it can save the space on the PCB board. It supports digital dimming signal. Once the dimming operation is completed, the dimming […]

Read More

How to improve the luminous efficiency of white led by Gan Gan semiconductor

Gan (gallium nitride) blue purple light-emitting module can be applied to the new generation DVD, so it is highly expected by relevant industries. In addition, using the luminous characteristics of LED high brightness and energy saving, blue purple light-emitting module can also replace traditional white light and fluorescent lamp and become the mainstream of white […]

Read More