公开(公告)号：US20150117066A1

公开(公告)日：2015-04-30

申请号：US14342724

申请日：2012-09-03

Applicant: NXP B.V.

Inventor： Markus Schmid ,  Johann Baptist Daniel Kuebrich ,  Thomas Antonius Duerbaum ,  Hans Halberstadt ,  Gian Hoogzaad ,  Frans Pansier

IPC: H02M3/335 ,  H02M1/08

CPC classification number: H02M3/33507 ,  H02M1/08 ,  H02M3/33523 ,  H02M2001/0032 ,  H02M2001/0035 ,  H02M2001/0054 ,  H02M2001/0058 ,  Y02B70/1491 ,  Y02B70/16

Abstract: A method is disclosed of controlling a switched mode converter comprising a switch and for providing power to device having a load, comprising: in response to the load exceeding a first threshold, operating in a first mode, being a CCM; in response to the load exceeding a second threshold and not exceeding the first threshold, operating in second mode, being a BCM without valley skipping wherein the switching frequency increases with decreasing load; in response to the load exceeding a third threshold and not exceeding the second threshold, operating in a third mode, being a BCM with valley skipping, wherein the switching frequency depends on the load and the number of valleys skipped and is between a fixed upper and a lower switching frequency limit; and in response to the load not exceeding the third threshold, operating in a fourth mode, being a BCM with valley skipping, wherein the switching frequency depends on at least the load, and is between an upper and a lower switching frequency limit wherein the upper switching frequency limit decreases with decreasing load. A switched mode converter controlled by such a method is also disclosed.

Abstract translation: 公开了一种控制包括开关并用于向具有负载的装置提供电力的开关模式转换器的方法，包括：响应于所述负载超过第一阈值，以第一模式操作，为CCM; 响应于所述负载超过第二阈值且不超过所述第一阈值，在第二模式下操作，所述BCM不具有谷跳跃，其中所述开关频率随负载减小而增加; 响应于超过第三阈值并且不超过第二阈值的负载，以第三模式操作，作为具有谷跳跃的BCM，其中开关频率取决于跳过的负载和谷数，并且在固定的上限和 较低的开关频率限制; 并且响应于不超过第三阈值的负载，以第四模式操作，作为具有谷跳跃的BCM，其中开关频率至少取决于负载，并且处于上和下开关频率极限之间，其中上部 开关频率限制随负载减小而减小。 还公开了通过这种方法控制的开关模式转换器。