With the influx of large-scale LED lighting companies, customers have higher and higher requirements for product performance and price. In order to reduce costs, many experts have launched high-voltage linear constant-current IC solutions. Some solutions do not require electrolytic capacitors. Therefore, in the LED industry The "photoelectric engine" is very popular. The high-voltage linear constant current driver chip, rectifier bridge stack, and high-voltage lamp beads are produced on the same board, which greatly saves labor and reduces costs. In the optoelectronic integrated module, the high-voltage linear constant current The performance of the LED driver chip determines the performance of the entire module and extends to the performance of the entire luminaire.

Driven by the high-voltage linear constant-current LED driver chip, more and more companies have begun to try to use it. Let‘s take a look at its advantages and disadvantages.

1. Advantages of high voltage linear led constant current driver IC:

1. The circuit is simple, and it has over-temperature and over-voltage protection, which is beneficial to protect the power supply.​​

2. High circuit stability and long life. (Because of the use of solid-state components such as chip capacitors and resistors, rectifier bridges, etc., the service life is longer than that of switching power supplies.

3. Higher efficiency and PF value.

4. The production cost is low, the scheme is simple, and the volume is small.

5. When used in high-power lamps (such as 30W, 50W, 100W, 150W), the power cost advantage is extremely obvious. 6. The good chips of LED panel light power supply manufacturers generally integrate EMC, dimming and other functions, and can meet the safety requirements without additional circuits.

Second, the shortcomings of the high-voltage linear constant-current LED driver chip:

1. There is strobe.

2. The same scheme cannot do full voltage and constant current

3. Large fluctuations in voltage will cause the temperature to be too high.​​

4. It is impossible to take into account the high efficiency and power factor.​​

5. The insulating heat dissipation shell must be used, and it is difficult to meet the safety requirements by using aluminum alloy as the heat dissipation body.

With the large-scale entry of LEDs into commercial and home lighting, customers have put forward more stringent requirements for product performance, price, and reliability. On the one hand, the luminous efficiency of LEDs is continuously improved and the price is continuously reduced. On the other hand, more requirements are put forward for the life of LED lamps. LEDs pursue simplicity, durability and high cost performance. The development of high-voltage linear constant current has just begun, and there is still a lot of room for technological improvement. At present, the input voltage range can only be constant voltage input, and brightness (current) adjustment will occur outside the range; the lamp beads are lit in sections, and the utilization rate of the lamp beads needs to be improved. Adding capacitors can eliminate stroboscopic, but the power factor value will reduce. Further improvement is needed in resisting surges, lightning strikes, etc. In any case, the application of high-voltage linear constant-current driver chips has become the mainstream of power drivers.