【摘要】 通过对自行设计的集成功率型1W白光LED进行测试,发现当持续点亮900h时,其光通量衰减只有12%,比传统支架型封装的白光LED明显慢,而色温飘移也不明显。1W白光LED的色温可以覆盖2700～13000K,并且显色指数均可做到80以上,完全能够满足普通照明对光性能指标的要求。通过对多颗小功率芯片(60mW)进行不同的串并联组合,可以实现不同的额定电压与电流,可以更好地匹配驱动器的设计,提高整体发光效能,降低成本,并满足不同场合的需求。最后给出了3个典型LED驱动设计实例。更多还原

【Abstract】 Power white LED of 1 W based on multi-chips integrated which is developed by ourselves has been tested. From the test results, it is found that the luminous decay is only about 12 %, after the lamp keeps enlightened for 900 h. So, it is slower than conventional white LED packing with brackets. (Furthermore,) the shift of color temperature is also not obvious. The color temperature of (1 W) white LEDs covers from 2 700 K to 13 000 K, and the color rendering index can achieve over 80. As such, the performance of power white LEDs can meet the illumination requirement completely. Integrating several chips on one heat sink by different serial and parallel modes, the power LEDs can realize different rating voltages and currents accordingly. This can match the power LEDs driver widely, increase the whole light emitting efficiency, decrease cost, and meet the requirements of different illumination location. Three examples of driver design are provided.更多还原