Seville Technology launched the super-PFC/PSR LED driver controller SFL900

Saiwei Technology (SiFirst Technology) recently released the industry's first super-PFC/PSR LED driver controller - SFL900, can be widely used in residential and commercial lighting field LED. The chip uses control architecture Saiwei technology patent, can also support the primary side feedback (PSR) and secondary (SSR), optocoupler feedback is an industry first. At the same time compatible with the mainstream single pin PFC chip, such as L6562/L6562A/SF6562/SFL320/SFL330, etc., greatly facilitate the application of the system.

In recent years, the single flyback PFC/PSR architecture chip due to its high power factor (PF), low system cost (using PSR architecture, eliminating the secondary optocoupler and 431), in the field of low-power LED lighting began to rise. However, at present, there are many defects in the PFC/PSR scheme in the market, which can be summed up as follows: (1) the original side feedback (PSR) and the secondary optocoupler feedback (SSR) can not be supported at the same time. Currently in the following 10W bulb light occasions, PSR architecture into the mainstream. In the above 10W occasions, especially in the field of T8 fluorescent lamps, the use of SSR single level PFC architecture because of its high precision constant current is still the mainstream. (2) the chip pin layout is not compatible with each other, which greatly increases the difficulty of the technology. (3) load regulation and line input adjustment rate, the need for external compensation circuit. (4) full voltage THD performance is poor, it is difficult to achieve full voltage THD