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:
Oct. 04, 2011
Filed:
Mar. 11, 2010
Hung-shou Nien, Changhua, TW;
Kuang-yao Cheng, Zhudong Township, Hsinchu County, TW;
Yi-chiang Fu, Zhubei, TW;
Wei-hsu Chang, Jubei, TW;
Hung-Shou Nien, Changhua, TW;
Kuang-Yao Cheng, Zhudong Township, Hsinchu County, TW;
Yi-Chiang Fu, Zhubei, TW;
Wei-Hsu Chang, Jubei, TW;
Richtek Technology Corp., Hsinchu, TW;
Abstract
A hybrid control circuit and method combine analog circuit and digital circuit to generate digital PWM signals for a multiphase DC-DC converter to generate an output voltage. For current balance control, analog current error signals are generated by the analog circuit from analog phase current signals of the multiphase DC-DC converter and then converted into digital current error signals for calculating the duties of each phase of the multiphase DC-DC converter. Therefore, fewer bit devices can be used to achieve precise current balance control and the size and cost of the circuit can be reduced.