NXP TEA1752T 90W笔记本电脑适配器设计方案

NXP 公司的GreenChip III  TEA1752T和TEA1752LT是第三代开关电源（SMPS）控制器，组合了功率因素修正（PFC）和反激控制器，通用火线电压从70VAC到276VAC，高度集成方便了设计，减少了外部元件数量，电源功率高达250W。本文介绍了TEA1752T和TEA1752LT主要特性和优势，方框图和典型应用框图，以及采用TEA1752T/52LT的90W笔记本电脑适配器主要特性，电路图和所用材料清单（BOM）。

The GreenChip III is the third generation of green Switched Mode Power Supply (SMPS)controller ICs. The TEA1752T and TEA1752LT combine a controller for Power Factor Correction (PFC) and a flyback controller. The high level of integration facilitates the design of a cost-effective power supply using a minimum 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 and reduced frequency operation at lower power levels. At low power levels, the PFC switches off to maintain high efficiency.

During low power conditions, the flyback controller switches to frequency reduction mode and limits the peak current to an adjustable minimum value. This will ensure high efficiency at low power and good standby power performance while minimizing audible noise from the transformer.
..

查看全文