恒流开关电源设计

Design of Constant Current Switching Power Supply

LED照明具有亮度高、功耗低、耐震动、寿命长、外观尺寸小、响应速度快等显著优点,可广泛应用于室内及室外照明、景观及装饰照明、汽车照明、道路照明等领域[1]。由于这些优点,近年来LED照明已逐步取代传统照明,市场规模逐渐扩大。LED驱动电源作为LED照明的重要组成部分,直接影响照明效果及使用寿命,近年来也随着LED照明技术的进步而得到较大发展。针对LED照明的特点,根据实际工程应用对LED恒流驱动开关电源的要求,以功率因数调整等设计目标为主线,详细介绍LED驱动电源各组成模块,并给出对各个模块的设计方法。

LED lighting with high brightness, low power consumption, vibration resistant, long service life, small appearance size and fast response etc, can be widely used in indoor and outdoor lighting, land-scape and decorative lighting, automotive lighting, road lighting and other fields. Because of these advan-tages, LED lighting has gradually replaced traditional lighting in recent years, and the market size has gradually expanded. LED driving power supply is an important part of LED lighting, which directly affects the lighting effect and service life, and it also has been developed greatly with the development of LED lighting technology in these years. According to the characteristics of LED lighting and the requirements of practical engineering application to the LED constant current driving switch power supply, taking the de-sign goals such as power factor adjustment as the main line, each module of LED driving power is intro-duced in detail, and the design methods for each module is given.