两级 LED 驱动器解决方案的可扩展、即插即用型参考设计
Modular LED lighting reference designs for LLC, buck and PFC flyback topologies
LED lighting has become a mature technology with stringent requirements on light quality. In order to achieve high light quality, there is a strong trend towards two-stage topologies. These two-stage topologies ensure that the light flicker or also called light ripple remains at low levels according to IEEE1789 and other new upcoming regulations. Within the dual-stage topologies, there is one topology that stands out due to its numerous advantages.
Primary constant voltage output, followed by a DCDC buck, enables benefits with regards to dimming, efficiency, cost, and scalability. The power range can be scaled by deploying:
- single stage flyback with constant voltage output for up to 100W
- two-stage LLC with constant voltage output for above 100W up to multiple hundred watts
The features can be scaled by adding an MCU on the secondary to implement diverse features including Dali. Another way to scale features can be adding multiple channels to realize either:
- tunable white or
- high power levels
Infineon has solutions for both the primary ACDC stage as well as for the secondary DCDC buck stage. These solutions can be combined in a plug & play concept. In other words, depending on the requirements you can select and test the suitable ACDC stage and the best fitting DCDC stage.
In the following, you will find an overview of our existing solutions for both stages. This overview will be adapted once more solutions are available in the coming months.
本参考设计采用高功率因数恒压数字反激式控制器 IC XDPL8219，带次级侧反馈。其电能质量在多个负载级别上均表现出色。该设计通过次级侧的可插拔扩展板实现了可交换反馈，在此设置下，采用 ILD8150E 构建高边降压拓扑结构，前者的击穿电压为 80V，确保 SELV 设计留有足够裕度。为实现精准的电流控制，低至 0.5% 的深度调光以及次级侧无闪烁灯光，本款次级侧评估板搭载两种型号的电感，以应对不同频率的工作模式。
该平台适用于功率大于 40W 的高效设计，通过单个引脚进行范围低至 0.5% 的混合调光，为专业 LED 驱动器提供出色的光品质