SMPS protection circuit in electronic appliance

申请公布号：US6462970(B2)

申请号：US20010939830

申请日期：2001.08.28

申请公布日期：2002.10.08

申请人：

LG ELECTRONICS INC.

发明人：KIM SANG YEAL

分类号：H02H3/38;H02M1/00;H02M1/32;H02M3/335;(IPC1-7):H02M7/04

主分类号：H02H3/38

摘要：Disclosed is an SMPS protection circuit, which can prevent unnecessary electric power consumption that may be caused due to a light load as well as damage of the SMPS protection circuit caused by a heavy load. According to the SMPS protection circuit, a voltage lowered by the load is fed back. If the fed-back voltage corresponds to the light load, the switching frequency of an SMPS transformer is downed. If the fed-back voltage corresponds to the heavy load, the SMPS protection circuit ceases to operate.

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