Power management needs have proliferated exponentially with the variety of mobile
phones, and device features and functions. As long as the mobile phone was simply
required to make and receive phone calls, it embodied one set of power management
requirements. However, as mobile phone manufacturers have heaped on the features, each
requirement has placed another demand on power management.
Raising the data rate for mobile phones and adding an Internet browser put extra demands on
battery life. Color liquid–crystal display (LCD) screens with white LED backlighting ...
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