Infineon XDPL8220 50W电源参考设计

Infineon公司的XDPL8220是高度集成的PFC和反激(FB)控制器,能节省外接元件和优化谐波性能.通用输入AC电压(90-305VAC)或(90-30VDC),可用功率范围20W-150W,效率高达90%,总谐波失真小于15%,多模式工作(恒流(CC)/恒压(CV)/限功率(LP)),工作温度-40 °C 到 85 °C,主要用在LED照明的电子控制器装置(ECG).本文介绍了XDPL8220主要特性,简化功能框图,典型应用电路和XDPL8220 50W参考设计主要特性和指标,电路图,材料清单和PCB设计图,扼流圈(Choke)电路图和变压器电路图.

XDPL8220 is a highly integrated next-generation device combining a boundary mode PFC plus a quasi-resonantFB controller with primary-side regulation. The integration of these functions enables saving of external partsand optimizes performance by harmonized operation of the two stages.

XDPL8220 uses a constant on-time scheme with a THD improvement algorithm to provide a high power factorand excellent THD performance.

With its unique control scheme of CV, CC and LP, the LED driver designer is provided with a large degree offlexibility and can utilize the system hardware to its limits.

The on-chip One Time Programmable Memory (OTP) memory has an area for parameters that control thebehavior of the circuit, e. g. the output current or the maximum output power. This enables the user of thedevice to create a platform concept with significantly fewer different hardware versions while still covering thesame application range.

The two-stage approach reduces any variation in the output current (flicker) to a non-visible level. By separatingthe PFC from the power conversion part (FB), both stages operate in a more stable manner and require fewermargins, which has a positive influence on the cost.

Lighting requires more and more 24/7 operation, making it necessary to have a stand-by mode with short wakeuptimes and low power consumption. The power consumption of less than 100 mW of the XDPL8220-basedsystems defines the new standard for stand-by power in lighting ECGs.

XDPL8220 enables adapti...