原标题：Powerint DER230 40W高效电源参考设计

　　powerint 公司的der230是采用TOP256EN的40W高效电源参考设计,主要用于迷你型笔记本电脑适配器.通用电压90-265VAC输入,满负荷是的效率大于86%,230VAC时无负载的功耗低于120W，超过USA能源和能源之星EPS v2, EU CoC v4 和EuP Tier 2规范要求, 满足EN55022B的EMC要求,并有8dB的富余量.本文介绍了DER230 40W电源参考设计的主要优势和指标,以及参考设计的详细电路图和所用材料清单.

　　40 W Power Supply Using a TOP256EN for Mini Notebook Adapter

　　40W高效电源主要特性和优势:

　　Low cost, low parts count

　　High full load efficiency at 115 VAC / 60 Hz (>86%)

　　High active mode efficiency at 115 VAC / 60 Hz (>87%)

　　Exceeds USA Energy Independence and Security Act 2007 of 83%

　　Exceeds Energy Star EPS v2 requirement of 85.3%

　　Exceeds EU CoC v4 and EuP Tier 2 requirement of 85.3%

　　Low no-load consumption <120 mW at 230 VAC

　　High light-load efficiency

　　Tight primary sensed output overvoltage protection

　　Auto-restart output overvoltage protection and output overload protection

　　Auto-restart auto-recovery output short circuit protection

　　Meets EN55022B conducted EMC with >8 dB margin

　　This document is an engineering report describing a 40 W power supply utilizing a TOP256EN. This power supply was intended as a general evaluation platform for mini notebook or netbook adapters.

　　The document contains the power supply specification, schematic, bill of materials,transformer documentation, printed circuit layout, and performance data.

　　图1.DER230电源参考设计PCB外形图

　　DER230电源指标:

　　图2.DER230电源电路图

　　DER230电源参考设计材料清单(BOM):