One: We must identify the brand of the capacitor; Japanese ruby ​​is particularly well-known, and Man Yue is more common. Of course, the price of a good brand is naturally more expensive than other miscellaneous brands.Bright star power supply selection materials are carefully selected electronic procurement components, engineering tests test the highest cost-effective electronic components. All LED drive power supplies are guaranteed for five years.

 

Two: IC control chip; Because the IC control chip has protection functions such as short circuit, overvoltage, overload, and overtemperature.

 

 

 

There are three types of driving methods currently used in the market, for example:

 

First, switching power supply

 

The finished switching power supply has high-end Bright star drive power, but the switching power supply is generally more expensive. So that in addition to quality in the harsh product market does not have an advantage.

 

Second, linear power

 

In fact, there are many linear power supplies, which is also a trend in the future market. The solution has linear IC drivers, including segmented and constant current diodes.

 

1. Linear ic (imported and domestically produced).

 

Imported brand, the current of a single IC is large, and it is currently in the leading level of linear technology. Compared with domestic linear ic or constant current diodes, it has excellent quality and good stability. Compared with switching power supplies, the price is reasonable.

 

 

 

2.Constant current diode

 

Mainly some domestic brands can also play a certain role in constant current. The disadvantages are that the power grid fluctuates easily, high pressure tube burst, poor pressure and impact resistance, failure to reach life, large heat generation, and low constant current accuracy.

 

3. Segmented

 

The advantage is high efficiency, but in the linear scheme, the cost is the highest. At the same time, there is a disadvantage. When the grid voltage changes, the current in each segment will be different, and the brightness of the different segments will be different. The probability is not the same, simply put it is different brightness. The segmented type also has many pins, and the SOP package has a small pitch.

 

Third, resistance capacitance scheme

 

It seems that there is no advantage except cheap. In the environment where some small motors are used, it is very easy to die. That is, when the power grid fluctuates, it has a great impact on LEDs, and the current is not constant. However, the road will only get narrower and narrower, and no more introduction will be made. I believe that when science and technology are more developed in the future, LEDs will bring greater convenience to our lives in a variety of ways. This requires our researchers to work harder to learn knowledge, so as to contribute to the development of science and technology. the power of.

 

 

 

                                                                                                                                                                                                                                                                                                                              (Article source website 21ic)