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AS1346/47/48/49 DC-DC系列是高效、恒频、双降压转换器,可提供1.2V至3.6V电压范围内的固定电压,电压增量为100 mV。每个型号都提供2个独立的DC-DC调节器,输出电流在0.5 A 至1.2 A之间(见下表)。其双通道的180度异相工作方式减少了输入电压纹波,并最大限度降低了对输入电容的要求。
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电源产品分类
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<P> 全球领先的通信、工业、医疗和汽车领域模拟集成电路设计者及制造商奥地利微电子公司(SWX 股票代码:AMS)推出业界最高效的大电流、双降压型<A href="http://www.cps800.com/news/22611.htm">DC-DC转换器</A>,它采用紧凑的3x3 mm TDFN封装。新型AS134x系列采用小尺寸封装,并提供高达95%的效率,这极大地延长了电池充电的时间间隔,从而很好地满足了空间受限且要求功耗较低的应用需求。AS134x系列主要应用于包括笔记本电脑、PDA、无线网络设备和固态硬盘(SSD)等在内的便携式设备。 </P> <P align=center><IMG alt=DC-DC转换器 src="/uploadfile/newspic/2010/201006/20100630145741104.jpg" border=0></P> <P> AS1346/47/48/49 DC-DC系列是高效、恒频、双降压转换器,可提供1.2V至3.6V电压范围内的固定电压,电压增量为100 mV。每个型号都提供2个独立的DC-DC调节器,输出电流在0.5 A 至1.2 A之间(见下表)。其双通道的180度异相工作方式减少了输入电压纹波,并最大限度降低了对输入电容的要求。这些器件的工作电压范围很宽(2.7 V 至5.5 V),具有自动省电模式,且带有内部MOSFET,仅需要少量的外部元件。AS134x的各种功能使之成为SSD和许多电池供电产品的理想选择。 </P> <P align=center><IMG alt=肖特基二极管 src="/uploadfile/newspic/2010/201006/20100630145753566.jpg" border=0></P> <P> 在关断模式下,典型电源电流降低到1 μA以下。此外,高效率的占空比实现了低压差工作,延长了便携式系统的电池寿命,而内部同步开关电路提高了效率,同时省去了外部肖特基二极管。内部固定开关频率(2.0 MHz)允许使用小型表面贴装电感。 </P> <P> 奥地利微电子高级产品经理Peter Kammerlander表示:“如今的电池供电设备拥有更多的功能,性能更高,对电源管理和效率提出了更高的要求。AS134x系列不仅满足了消费类电子的需求,同时还适用于超低功耗系统、门限检测器/鉴别器、医疗仪器、遥测和遥控系统等其他应用。” </P> <P> <TABLE style="PADDING-RIGHT: 0.75pt; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; MARGIN-LEFT: 50.4pt; PADDING-TOP: 0.75pt; BORDER-COLLAPSE: collapse; mso-table-layout-alt: fixed"> <TBODY> <TR> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: rgb(0,0,0) 0.75pt outset; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: rgb(0,0,0) 0.75pt outset; WIDTH: 108pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: 0.7500pt outset rgb(0,0,0); mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=144> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: '宋体'; mso-spacerun: 'yes'">型号</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: '宋体'"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: rgb(0,0,0) 0.75pt outset; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: medium none; WIDTH: 108pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: none; mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=144> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; mso-spacerun: 'yes'">Iout1</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: rgb(0,0,0) 0.75pt outset; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: medium none; WIDTH: 90pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: none; mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=120> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; mso-spacerun: 'yes'">Iout2</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'"><o:p></o:p></SPAN></P></TD></TR> <TR> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: medium none; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: rgb(0,0,0) 0.75pt outset; WIDTH: 108pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: 0.7500pt outset rgb(0,0,0); mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=144> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; mso-spacerun: 'yes'">AS1346</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: medium none; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: medium none; WIDTH: 108pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: none; mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=144> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; mso-spacerun: 'yes'">1.2 A</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: medium none; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: medium none; WIDTH: 90pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: none; mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=120> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; mso-spacerun: 'yes'">0.5 A</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'"><o:p></o:p></SPAN></P></TD></TR> <TR> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: medium none; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: rgb(0,0,0) 0.75pt outset; WIDTH: 108pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: 0.7500pt outset rgb(0,0,0); mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=144> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; mso-spacerun: 'yes'">AS1347</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: medium none; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: medium none; WIDTH: 108pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: none; mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=144> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; mso-spacerun: 'yes'">0.5 A</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: medium none; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: medium none; WIDTH: 90pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: none; mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=120> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; mso-spacerun: 'yes'">0.5 A</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'"><o:p></o:p></SPAN></P></TD></TR> <TR> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: medium none; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: rgb(0,0,0) 0.75pt outset; WIDTH: 108pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: 0.7500pt outset rgb(0,0,0); mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=144> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; mso-spacerun: 'yes'">AS1348</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: medium none; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: medium none; WIDTH: 108pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: none; mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=144> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; mso-spacerun: 'yes'">0.5 A</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: medium none; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: medium none; WIDTH: 90pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: none; mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=120> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; mso-spacerun: 'yes'">0.95 A</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'"><o:p></o:p></SPAN></P></TD></TR> <TR> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: medium none; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: rgb(0,0,0) 0.75pt outset; WIDTH: 108pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: 0.7500pt outset rgb(0,0,0); mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=144> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; mso-spacerun: 'yes'">AS1349</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: medium none; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: medium none; WIDTH: 108pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: none; mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=144> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; mso-spacerun: 'yes'">1.2 A</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'"><o:p></o:p></SPAN></P></TD> <TD style="BORDER-RIGHT: rgb(0,0,0) 0.75pt outset; PADDING-RIGHT: 0.75pt; BORDER-TOP: medium none; PADDING-LEFT: 0.75pt; PADDING-BOTTOM: 0.75pt; BORDER-LEFT: medium none; WIDTH: 90pt; PADDING-TOP: 0.75pt; BORDER-BOTTOM: rgb(0,0,0) 0.75pt outset; mso-border-bottom-alt: 0.7500pt outset rgb(0,0,0); mso-border-left-alt: none; mso-border-right-alt: 0.7500pt outset rgb(0,0,0); mso-border-top-alt: 0.7500pt outset rgb(0,0,0)" vAlign=center width=120> <P class=p0 style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; LINE-HEIGHT: 120%; TEXT-ALIGN: center"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'; mso-spacerun: 'yes'">1.2 A</SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Arial'"><o:p></o:p></SPAN></P></TD></TR></TBODY></TABLE><!--EndFragment--></P> <P> AS134x DC-DC转换器系列采用节约空间的12引脚、TDFN 3x3 mm封装,工作电源电压为2.7至 5.5V,工作环境温度为-40至85°C。■</P>