Brief analysis of the application of Feishi electronic load in the LED industry

LED has been developed for more than 30 years. Various types of LED, products using LED for secondary development and products supporting LED (such as white LED drivers, etc.) have developed rapidly. New products are constantly launched and have developed into many new industries. Looking back, it has grown vigorously. Looking forward to the future, we still hope to improve further.

At present, LED industry investment is a hot key project in the world, and countries around the world attach great importance to the research and development and production of LED. In my country, the pace of LED development is also being accelerated. China is a major electronic manufacturing country and is developing rapidly. Domestic industries such as mobile phones, automobiles, display screens, notebook computer backlights, monitors and display billboards are huge driving forces for the development of LED. Moreover, with the development of the national semiconductor lighting project, the domestic LED industry has broad development prospects. In the next five years, my country will also promote semiconductor lighting as a major project, and the Ministry of Science and Technology has approved seven places including Shanghai, Dalian, Nanchang, Xiamen, Shenzhen, Shijiazhuang and Yangzhou as LED industrialization bases. According to the expected targets of these seven major industrial bases, it is estimated that in 2011, the output value of the entire Chinese LED industry will exceed 180 billion yuan.

The reason why LED has such a huge market development space is that it has the following advantages and characteristics, which determine that it is the most ideal light source to replace traditional light sources, making it have a wide range of uses.

1. High light efficiency: The spectrum is almost entirely concentrated in the visible light frequency, and the efficiency can reach 80%-90%. The visible light efficiency of incandescent lamps with similar light efficiency is only 10%-20%.

2. High light quality: Since there is no ultraviolet and infrared light in the spectrum, there is no heat and no radiation. It is a typical green lighting source.

3. Low energy consumption: The power of a single lamp is generally 0.05-1w, and it can be tailored to meet different needs through clustering, with little waste. Using it as a light source, the power consumption is only 1/8-10 of that of an ordinary incandescent lamp at the same brightness.

4. Long life: The standard life of a semiconductor lamp when the luminous flux decays to 70% is 100,000 hours. A semiconductor lamp can be used for 50 years under normal circumstances. Even a person who lives to be 100 years old will only use 2 lamps at most in his lifetime.

5. Reliable and durable: There are no easily damaged parts such as tungsten filaments and glass shells. The abnormal scrap rate is very low and the maintenance cost is extremely low.

6. Flexible application: small size, can be flat packaged, easy to develop into thin and short products, and made into specific application products in various forms of points, lines and surfaces.

7. Safety: The unit operating voltage is roughly between 1.5-5v, and the operating current is between 20-70mA.

8. Green and environmentally friendly: waste can be recycled, there is no pollution, and it does not contain mercury like fluorescent lamps.

9. Short response time: suitable for occasions of frequent switching and high-frequency operation.

The continuous development of the LED industry has also driven the rapid development of its upstream and downstream industries, such as semiconductor materials, electronic loads, etc. The FT6300A series single-channel programmable DC electronic load developed and produced by Feisi Technology has been widely used in LED industry testing due to its "safe, stable and durable" characteristics.

The FT6300A series electronic load not only provides powerful test functions and a friendly human-machine interface, but is also equipped with an RS232 interface (GPIB-RS232 and RS485-RS232 are also available as options). It is very suitable for testing LED devices and can provide a variety of solutions for LED product design and testing.

The FT6300A series electronic loads include FT6301A, FT6302A, FT633A, FT6304A, FT6305A and FT6306A. With good stability and careful design, combined with the powerful host software of Feisi Technology, it is undoubtedly the best choice for LED device testing.

FT6300A Series Single channel programmable DC electronic load

When the FT6300A series electronic load is testing LED devices, the main test items are:
1. Inrush current test. Inrush current refers to the maximum instantaneous current that passes before the input current reaches a stable state when the input voltage is connected or disconnected at a specified time interval, which is generally 20A-30A.
2. Overcurrent protection test. It is a load protection function to avoid damage to LED devices and loads caused by overload output current, including short circuits on the output terminals. The given value of overcurrent is generally 110%-130% of the rated current.
3. Overvoltage protection test. It is a function of load protection against excessive voltage between terminals. It is generally specified as 130%-150% of the output voltage.
4. Output undervoltage protection test. When the output voltage is below the standard value, the output voltage drops or the power supply is stopped and an alarm signal is issued to protect the load and prevent misoperation. It is usually about 80%-30% of the output voltage. 5. Overheat protection test.
When an abnormality occurs inside the LED device or the power supply temperature rises beyond the standard due to improper use, the power supply is stopped and an alarm signal is issued.
6. Leakage current test. Leakage current is the current flowing through the input side ground wire. In LED devices, it is mainly the leakage current through the bypass capacitor of the noise filter. UL and CSA both require that exposed non-charged metal parts should be connected to the ground. The leakage current is measured by connecting a 1.5K ohm resistor between these parts and the ground. The leakage current should not be greater than 5 mA. VDE allows: Use a 1.5K ohm resistor in parallel with a 150nP capacitor. And apply 1.06 times the rated operating voltage. For data processing equipment, the leakage current should not be greater than 3.5 mA. It is generally around 1 mA.
7. Insulation resistance test. VDE requires: There should be a 7M ohm resistor between the input and the low-voltage output circuit, and a 2M ohm resistor or a 500V DC voltage for 1 minute between the accessible metal part and the input.

When testing LED devices, the Feisi FT6300A series electronic load can take corresponding protective measures for abnormal phenomena (such as over-current, over-voltage, over-power, input reverse connection, overheating and loss of control, etc.) that occur during the test, and prompt the corresponding information on the load display screen.
Feisi Technology has equipped the FT6300A series electronic load with powerful host computer software. Users can connect the load to the PC through the RS232 port on the Feisi electronic load. In addition to completing the panel operation functions (including steady-state test, short-circuit test, sequence test, transient test, automatic test and OCP test, etc.), the host computer software can also timely observe the curve changes of voltage, current, resistance and power over time.

Looking at the entire domestic LED market, overall, China's LED industry will continue to grow in the future, which is also a good market opportunity for Chinese companies producing LED testing equipment.