SiFirst

Wellcome

— — TO OUR COMPANY

Sifirst Technologies Nanhai Limited was founded in 2009, who was the first IC design company in Foshan invested by Nanhai High-tech industry investment co., Ltd. Our headquarters sites in Hantian High-tech industry, Nanhai District, Foshan, We also have R&D Center in Shanghai, Shenzhen Business center, Office in Zhongshan and Taiwan. Our business covers all of China and other countries in the world. Sifirst Technologies have a innovative design team build up with Doctor, Master and domestic semiconductor senior design specialist, they have more than 10 years working
experience in famous semiconductor company,
with Strong theoretical foundation and rich practical
experience, have already designed lots of world-class
chips in analog and digital hybrid chip area.

Sifirsttech focus on development, sales, service of high performance and high quality green power, IC for lighting driver. Power range between 0.5W~150W application of AC/DC.

SF59XX Series, applied between 6~18W, PSR mode, with SOT23-5/DIP-7/DIP/8 package, it can achieve low system cost, high efficiency, low standby, meet energy efficiency level 6, applied in small power charger, adapter and led lighting.
SF60XX Series, applied between 3~6W, PSR mode, with SOT23-5/SOP-7 package, it can achieve low system cost, high efficiency, low standby, meet energy efficiency level 6, applied in small power adapter.
SF67XX Series, applied in 6~18W, QR-PSR mode, with SOT-6/SOP-7/SOP-8 package, it can achieve low system cost, high efficiency, low standby, meet energy efficiency level 6, applied in small power adapter, charger and led lighting.













SF55XX Series, applied in 15-70W, PWM mode, with SOT23-6/SOP-8/DIP-8 package, it can achieve extremely high performance, high reliability, meet energy efficiency level 6, applied in small and medium power adapter, power switch.
SF57XX/SF58XX series, applied in 15~150W, PWM QR mode, with SOT23-6/SOP-8/DIP-8 package, with high efficiency, low standby, meet energy efficiency level 6, applied in small and medium power adapter, power switch.
SF15XX series, applied in 6~70W, PWM mode, with SOT23-6/DIP-8 package, with extremely high performance, high reliability, applied in small and medium power adapter, power switch, led lighting.
SFL3XX Series, applied in 10~60W, flyback PFC architecture, with SOP-8 package, good short circuit protection, extremely low standby, wide VCC voltage etc., leading technology, applied in led lighting.
SFL5XX Series, applied in 12~36W, Buck architecture, with SOP-8/DIP-8 package, Quasi-resonant control, efficiency >90%, support analog and PWM dimming, applied in led lighting.
SFL8XX Series, applied in 12~60W, Boost-PFC/PSR architecture and Boost-PFC/Buck, with SOP-8 package, Quasi-resonant control, PF>0.9, THD<15%, applied in led lighting.
SFL9XX Series, applied in 12~100W, Super-PFC/PSR architecture, with SOT23-6/SOP-8 package, Quasi-resonant control, PF>0.9, THD<10%, applied in led lighting.
Sifirsttech always stick to innovation, focus on create a excellent green technology platform, we chase for better in technology, quality and service, leading a new generation of IC.