Key points of LED lighting design

To design products, we must first determine the LED package structure; then consider how to adapt to the packaging form; by chance is not much, the optical structure is built on these packages above; many creative play is not very good. The following describes the key issues and analysis of LED lighting design process.

There is a, semiconductor lighting application problems

1, heat

2, lack of standards, uneven in quality products

There are 3, price and design quality problems, consumers choose LED lighting, lack of confidence

4, semiconductor lighting in electrical design and traditional lighting are very different, the traditional lighting companies need the process of accumulation of experience / skills

Characteristics:

1, through the adjustment of high precision constant current LED chip, to ensure consistency of brightness and color, provides the standard for the downstream customers in the module level, customized, high quality and reliable products;

2, old and new lighting design manufacturers, electrical design should not be too complicated, you only need to design the simple circuit constant voltage power supply can work in the traditional external plus, is one of the fastest and most reliable way;

3, solve the LED lighting market scale the amount of technical and quality problems.

Two, thermal design

1, the shortest path to the heat, reduce heat conduction resistance;

2, increase mutual transmission area, increase the heat to speed;

3, reasonable design and calculation of cooling area;

The effect of heat capacity and effective 4.

Output drive voltage selection:

1, within 20W electric driving when about 48V more appropriate;

Power electric 2, large driving output voltage is about 36V the most appropriate;

3, offline lighting are mostly 12V and 24V voltage.

Characteristics:

1, based on series parallel safety load drive voltage values appropriate to reduce power supply design specifications unified voltage value cost;

2, based on safety regulations, product design to meet the certification requirements, the current peak voltage of more than 42.4Vac or more than 60Vdc dc;

Considering the technical and quality problems 3, from solving the LED lighting market scale amount.

Three, the highest efficiency rear drive mode

When the output voltage is about 48V, low dropout linear constant current device, constant current efficiency up to 99%, the precision of constant current is less than 3%, without any peripheral devices; when the output voltage is about 36V, low dropout linear constant current device, constant current efficiency up to 98.6%, the precision of constant current is less than 3%. Without any peripheral devices;

Even in off-line lighting part, low voltage 12V and 24V, respectively, efficiency of 96% and 98%; the size of the power efficiency is equal.

Features: constant current driving structure is the most efficient way; constant current high accuracy, by peripheral devices with minimal impact; simple, convenient and practical.