Method and apparatus to control voltage conversion mode

Details Method and apparatus to control voltage conversion mode Method and apparatus to control voltage conversion mode

2011-03-01

2011-03-01

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S285000

Reexamination Certificate

active

07898235

ABSTRACT:
A method and apparatus to control a voltage conversion mode in a voltage converter are provided. The apparatus to control a voltage conversion mode includes: a voltage converter which converts an input voltage to an output voltage and having a plurality of voltage conversion modes; an input sensor which detects an input current value that is input to the voltage converter from a voltage source; an output sensor which detects an output current value that is output to a load from the voltage converter; and a controller which determines a power efficiency of the voltage converter based on the input and output current values and which switches between the voltage conversion modes of the voltage converter according to the detected power efficiency. Accordingly, an efficiency of voltage conversion is maximized, and a usage time of a mobile device can be lengthened.

REFERENCES:
patent: 4783774 (1988-11-01), Enomoto
patent: 5475296 (1995-12-01), Vinsant et al.
patent: 6137267 (2000-10-01), Kates et al.
patent: 2005/0128773 (2005-06-01), Yang et al.

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