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:
Feb. 04, 2014
Filed:
May. 26, 2011
Yu-wei Chang, Pitou Township, Changhua County, TW;
Yuan-huang Cheng, Pingtung, TW;
Ting-hung Wang, Taipei, TW;
Chia-jung Lee, Toufen Township, Miaoli County, TW;
Chung-sheng Cheng, Zhubei, TW;
Yu-Wei Chang, Pitou Township, Changhua County, TW;
Yuan-Huang Cheng, Pingtung, TW;
Ting-Hung Wang, Taipei, TW;
Chia-Jung Lee, Toufen Township, Miaoli County, TW;
Chung-Sheng Cheng, Zhubei, TW;
Richtek Technology Corporation, R.O.C., Chupei, Hsin-Chu, TW;
Abstract
The present invention discloses a multi-phase switching regulator, a driver circuit of a multi-phase switching regulator, and a control method of a multi-phase switching regulator. The multi-phase switching regulator includes: at least two power stages, switching power transistors in the power stages to convert an input voltage to an output voltage according to pulse width modulation (PWM) signals generated by corresponding PWM controllers respectively; and a current balance circuit, generating a current balance signal according to the current of the corresponding power stage and a phase adjustment signal to averagely distribute current over the active power stages. In the present invention, the gain of the current balance circuit is adjustable, to avoid or reduce output voltage overshoot and undershoot when the phase number changes, while the current balance function is still achieved in normal operation.