公开(公告)号：US20140062430A1

公开(公告)日：2014-03-06

申请号：US14014896

申请日：2013-08-30

Applicant: STMicroelectronics S.r.I.

Inventor： Osvaldo Enrico Zambetti ,  Daniele Giorgetti ,  Alessandro Zafarana

IPC: G05F1/10

CPC classification number: G05F1/10 ,  H02M3/1584 ,  H02M2001/0032 ,  H02M2003/1566 ,  Y02B70/16

Abstract: In a multi-phase power supply voltage regulator functioning at a nominal switching frequency, one or more phases are kept off for optimizing energy efficiency at relatively low load conditions. Reactivation of stand-by phases in response to a load increase transient is made more efficiently by exploiting information already present in the output voltage control loop. The technique comprises a) deriving from the control loop information on the equivalent nominal switching frequency given by the product of the nominal switching frequency by the number of active phases; b) updating at every beat of a clock signal the instantaneous value of the equivalent switching frequency; c) determining the band of equivalent switching frequency values to which the instantaneous value belongs; d) logically combining the equivalent switching frequency information with a determined band of output current level, for switching on one or more stand-by phases in response to a load increase transient.

Abstract translation: 在标称开关频率下工作的多相电源电压调节器中，一个或多个相位被保持关闭，以在相对低的负载条件下优化能量效率。 通过利用已经存在于输出电压控制回路中的信息，更有效地重新启动响应于负载增加瞬态的待机阶段。 该技术包括：a）从控制环路得出关于由标称开关频率乘积给出的等效标称开关频率与有效相位数的信息; b）在时钟信号的每个节拍上更新等效开关频率的瞬时值; c）确定瞬时值所属的等效开关频率值的频带; d）将等效开关频率信息与确定的输出电流电平的频带进行逻辑组合，以响应于负载增加瞬态来接通一个或多个待机阶段。