The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 05, 2012
Filed:
Jun. 16, 2010
Wei-lun Hsieh, Kaohsiung, TW;
Hung-sung Chu, Kaohsiung, TW;
Der-jiunn Wang, Hsinchu, TW;
Kuo-chen Tsai, Hsinchu, TW;
Wei-hsin Wei, Jhubei, TW;
Wei-Lun Hsieh, Kaohsiung, TW;
Hung-Sung Chu, Kaohsiung, TW;
Der-Jiunn Wang, Hsinchu, TW;
Kuo-Chen Tsai, Hsinchu, TW;
Wei-Hsin Wei, Jhubei, TW;
Richtek Technology Corp., Hsinchu, TW;
Abstract
For a charge pump, a control circuit switches two or more input voltages to apply to one or more pumping capacitors under auto-sensing control to modulate a maximum pumping voltage as close as to a demanded output voltage to thereby reduce the difference between the maximum pumping voltage and the output voltage for efficiency and thermal improvement of the charge pump. The maximum pumping voltage is produced by mixing the different input voltages and the charge pump may provide more operation modes.