[High-tech LED News] SiFirst Technology recently launched two new driver ICs. They are SFL678 and SFL688. The new ICs use a primary-side feedback (PSR) control architecture that eliminates the optocouplers and many auxiliary components commonly used in traditional flyback designs, significantly reducing system cost and making them suitable for high-end LED lighting applications. Av Over Ip System For Corporate Room Av Over Ip System For Corporate Room,Video Decoder,Hd Video Decoder,Network Ip Decoder SZ REACH TECH,.CO LTD , https://www.szreachtech.com
SFL678, also known as Temperature Foldback temperature management control function, can greatly extend the life of LED lamp beads, ensuring the normal operation of LED lighting cups and LED tubes during the warranty period. Its unique nonlinear temperature foldback technology can effectively monitor the temperature of the LED system. At the temperature turnback point, the LED current is reduced, and the brightness of the LED is also reduced until the system temperature falls to a safe range. The SFL678 also features a patented extended sync dimming technology that supports analog/digital/TRIAC dimming with a dimming ratio of up to 1000:1.
SF688 is an ultra-high constant current precision LED constant current driver. The chip uses a patented constant current control and correction technology, combined with the built-in system constant current point temperature compensation function, can achieve mass production of 3% constant current accuracy, reaching the highest level of simulation in the industry. The SFL668 strictly controls the reference voltage of the constant current comparator to ensure that the error is less than +/1%.
The IC internally compensates the system temperature characteristics; the control algorithm automatically compensates for line voltage input variations and transformer inductance errors; and the constant current control algorithm uses patented constant current control and correction techniques to compensate for the non-ideal characteristics of the original PSR algorithm.
In addition, the ICs have a very wide VDD operating range from 10V to 30V, making LED system design more flexible. The SFL678 is available in a small SOT23-6 package and the SFL688 is available in a small SOT23-5 package. 