公开(公告)号：WO2014137786A3

公开(公告)日：2015-04-30

申请号：PCT/US2014019314

申请日：2014-02-28

Applicant: MICROCHIP TECH INC

Inventor： ROSU-HAMZESCU MIHNEA

IPC: H02M3/337 ,  H02J7/00 ,  H02M1/00 ,  H02M1/38 ,  H02M3/157 ,  H02M3/158 ,  H03K17/18

CPC classification number: H02M3/337 ,  H02J7/0052 ,  H02J2007/0059 ,  H02M3/1588 ,  H02M2001/0058 ,  H03K17/0822 ,  H03K2017/307 ,  H03K2217/0081 ,  Y02B40/90 ,  Y02B70/1466 ,  Y02B70/1491

Abstract: Efficiency of a switch mode power supply (SMPS) is optimized by operating the SMPS in an asynchronous mode when current being supplied therefrom is less than a certain current value and operating the SMPS in a synchronous mode when the current being supplied therefrom is equal to or greater than the certain current value. When the SMPS is operating in the synchronous mode high-side and low-side power transistors alternately turn on and off. When the SMPS is operating in the asynchronous mode only the high-side power transistor turns on and off and the low-side power transistor remains off. When charging a battery with the SMPS discharge of the battery is eliminated when operating in the asynchronous mode at a low current output.

Abstract translation: 开关模式电源（SMPS）的效率通过以异步模式操作SMPS而被优化，当从其提供的电流小于某一电流值并且当从其提供的电流等于或等于或等于 大于当前值。 当SMPS在同步模式下工作时，高侧和低端功率晶体管交替开启和关闭。 当SMPS工作在异步模式时，只有高端功率晶体管导通和关断，低端功率晶体管保持关断。 当以低电流输出在异步模式下工作时，电池的SMPS放电电池的充电将被消除。