Maxim MAX16841最大化效率离线LED驱动解决方案
Maxim 公司的MAX16841是带平滑调光并有最大化效率的离线（100V, 120V, 220V, 和230V AC)LED驱动器，并提供有源功率因素修正（PFC），既可用于隔离（如反激）和非隔离（如降压）配置。MAX16841采用恒定频率控制技术以得到最大化的效率，通用输入电压90V 到264V AC，主要用在带TRIAC调光的LED灯，通用输入LED灯，工业和商业照明，住宅区LED照明等。本文介绍了MAX16841主要特性，方框图，非隔离（降压）和反激拓扑图，以及反激和降压与降压-升压LED驱动器电路图。
Offline LED Driver Provides Smooth Dimming and Maximizes Efficiency
The MAX16841 is an LED driver for AC line (100V, 120V, 220V, and 230V AC) input lamps. It features proprietary control of the input current that allows lamps to dim smoothly from full to zero light intensity, while providing active power factor correction (PFC). It is a very flexible product that can be used in isolated (e.g., flyback) and nonisolated (e.g., buck) configurations. The conventional use of an optocoupler in isolated configurations can be avoided in MAX16841-based designs.
The constant frequency-control technique of the device allows maximization of the conversion efficiency at both low and high AC line by operating at the conduction mode that minimizes total conduction and switching losses.
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