On Semi NCL30088 18W高功率因素LED驱动方案
On Semi公司的NCL30088是AC/DC转换器电源PFC反激控制器, 作在准谐振模式以提供最佳效率,主要用在非隔离的降压-升压/SEPIC恒流LED驱动器. 由于采用新颖控制方案,器件可从初级边调整恒定LED电流,使得次级边不需要反馈电路,偏压和光耦合器,从而外接元件最少, 主要用在LED灯泡和管,LED驱动器/电源以及LED照明引擎, LED照明的电子控制装置.本文介绍了NCL30088主要特性,功能框图,典型应用电路,以及18W高功率因素LED驱动器评估板NCL30088LED1GEVB主要特性别,电路图,材料清单和PCB元件布局图.
The NCL30088 is an Ac-Dc power factor corrected flyback controller targeting isolated and non−isolated buck-boost/SEPIC constant current LED drivers. The controller operates in a quasi−resonant mode to provide optimal efficiency. Thanks to a novel control method, the device is able to tightly regulate a constant LED current from the primary side. This removes the need for secondary side feedback circuitry, biasing and an optocoupler. The device is highly integrated with a minimum number of external components. A robust suite of safety protection is built in to simplify the design. This device is specifically intended for very compact, space efficient designs.
NCL30088主要特性:
• Quasi−resonant Peak Current−mode Control Operation
• Constant Current Control with Primary Side Feedback
• Tight LED Constant Current Regulation of ±2% Typical..
