Power supplies for next generation systems must be appropriately tuned

Hansen, Jason
April 2005
Portable Design;Apr2005, Vol. 11 Issue 4, p20
Portable products continue to become increasingly sophisticated with new features and capabilities being incorporated, such as color LCDs, organizers, and micro-browsers as well as entertainment features like FM tuners, MP3 players, and games. However, users' expectations are that these new features will not add weight to the product or affect the operating or standby time between battery recharges. One method of addressing these conflicting needs is through improvements in digital semiconductor manufacturing techniques and advances in power management techniques. The battery section of feature rich portable devices has mainly transitioned from NiMH to Lilon batteries due to the Lilon's better volumetric and gravimetric energy densities. That translates to less size and weight for a given charge capacity. Alkaline cells and NiMH are still present in PDAs and digital still cameras, especially in the lower-cost architectures.


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