NXP TEA1751T GreenChip III SMPS控制方案
NXP公司的TEA1751T 和TEA1751LT是第三代GreenChip III 开关电源(SMPS)控制器,它把PFC和反激控制器组合在一起.通用的交流电压从70V(AC)到276V(AC),内置的绿色功能在各个功率范围提供高的效率,主哟用在高达250W的开关电源如笔记本电脑适配器.本文介绍TEA1751T 和TEA1751LT主要特性,方框图以及典型配置框图和典型应用框图.
TEA1751T; TEA1751LT: GreenChip III SMPS control IC
The GreenChip III is the third generation of green Switched Mode Power Supply (SMPS) controller ICs. The TEA1751(L)T (TEA1751T and TEA1751LT) combines a controller for Power Factor Correction (PFC) and a flyback controller. Its high level of integration allows the design of a cost-effective power supply with a very low number of external components.
The special built-in green functions provide high efficiency at all power levels. This applies to quasi-resonant operation at high power levels, quasi-resonant operation with valley skipping, as well as to reduced frequency operation at lower power levels. At low power levels, the PFC switches off to maintain high efficiency.
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