Project Analog - December 2007 - (Page 8)

some new trends in battery-powered portable devices The options designers have to ensure that battery life is optimized for their particular configuration By Tony Armstrong Linear Technology / Milpitas, CA / http://linear.com Contents Viewpoint Charging lithium-ion batteries New trends in battery-powered portable devices Low power design: LDO thermal considerations Analog news T he year 2006 turned out to be stellar for the shipment of battery-powered portable electronic devices. Last year, consumers bought over 950 million cell phones, 220 million notebooks, 140 million MP3 players, 90 million DSCs, and 10 million GPS systems. Still other products are hybrid versions of two or even three of these product functions, such as portable media players (PMPs) or digital media broadcast products. The advantage of PMPs is that they can play both MP3 and MP4 formats. Therefore, a single device can be used to listen to music or watch a movie from a DVD-CD, or from a downloaded file from a Web site. 8 · prOject AnALOg · Dec 07 Many of these PMPs include a harddisk drive (HDD) for high-capacity storage capability (over 150 hours of video or 1,200 hours of music). However, manufacturers of these PMPs are under ever-increasing pressure to pack all of these features into an already-constrained form factor while simultaneously gaining longer runtimes. Since most PMPs have the functionality of both a video player and a MP3 player, the internal electronics requires multiple low-voltage output rails at varying power levels. The reason for this is clear; the majority of the digital large-scale-integrated (LSI) ICs have operating voltage of 1.5 V or less. Microchip analog page Battery charger overview Sample center microchipDIRECT Reference designs/ app notes Technical training http://linear.com http://www.microchip.com http://www.microchip.com/analog http://www.microchip.com/analog http://www.microchip.com/batterychargers http://www.microchip.com/batterychargers http://sample.microchip.com/Default.aspx?testCookies=true http://www.microchipdirect.com/catalogselection.aspx?returnURL=default.aspx http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1469&filter1=function&redirects=appnotes http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1469&filter1=function&redirects=appnotes http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1423

Table of Contents Feed for the Digital Edition of Project Analog - December 2007

Project Analog - December 2007 Contents Viewpoint About Project Analog Sponsor4 Charging Lithium-Ion Batteries: System Considerations New Trends In Battery-Powered Portable Devices Low Power Design: LDO Thermal Considerations Runtime Measurements for a Hybrid Power Source Battery-Powered System Design Considerations Analog News—Analog News from Multiple Sources Enter to Win an iPhone Contact Project Analog Sponsor Mindi™ Battery & Power Circuit Simulator Microchip Advanced Parts Selector (MAPS)

Project Analog - December 2007

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