Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Ke-Horng Chen0
Shih-Min Chen0
Ming-Tan Hsu0
Chien-Fang Peng0
Date of Patent
February 6, 2007
Patent Application Number
11308681
Date Filed
April 21, 2006
Patent Citations Received
Patent Primary Examiner
Patent abstract
A boost DC/DC converter, including a mask circuit, a switched boost circuit, a pulse width modulation (PWM) circuit and an AND gate, is provided. The mask circuit is used to output a mask signal according to a load current. In the present invention, the system can selectively operate in the pulse width modulation mode, the pulse frequency modulation (PFM) mode or the mixed pulse mask mode according to the mask signal corresponding to the load current when the system is under light load, medium load or heavy load respectively, so as to achieve optimal system efficiency.
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