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Efficiency and size: challenges in power management for portable devices

Posted: 11 Sep 2007     Print Version  Bookmark and Share

Keywords:power subsystem  power regulation  portable devices 

Efficiency and solution size are two terms that are constantly associated with power-management solutions for battery-powered handheld devices. However, in my experience, they are very rarely placed into the context of the handheld designer or the end customer. How many times have we heard or said "this power solution is 95% efficient"? I admit that I have used that as an opening line during many customer visits. However, how often to we think about what "95% efficiency" means to the system designer? This article provides personal perspectives and discusses some strategies for optimizing the design of power systems in handheld devices, as well as needed improvements.

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