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公开(公告)号:US20170181257A1
公开(公告)日:2017-06-22
申请号:US15127691
申请日:2014-06-16
申请人: Cyrous Rostamzadeh , Shijie Wang , Rajesh Das , Steven Gladstein , Timothy Foster , Allen Marecki , Sanjai Master
发明人: Cyrous Rostamzadeh , Shijie Wang , Rajesh Das , Steven Gladstein , Timothy Foster , Allen Marecki , Sanjai Master
CPC分类号: H05B41/2806 , H02M1/12 , H02M1/42 , H02M1/44 , H02M7/003 , H02M2001/123 , H05B37/0272 , H05B41/24 , H05K1/0234 , Y02B20/22
摘要: A connected light node (CLN) induction light ballast module for powering an induction lamp includes a printed circuit board having components mounted thereon and an earth ground region electrically isolated from a PCB ground region. A heat sink is disposed on a lower layer of the printed circuit board and electrically connected to the earth ground region, wherein a parasitic capacitance occurs between the printed circuit board ground region and the heat sink. A capacitive shield sandwiched by a lower insulating pad and an upper insulating pad is electrically isolated from the heat sink supporting the shield. A damping network electrically connects the capacitive shield to the PCB ground region. Switch-mode power converters are mounted above the upper insulating pad and the shield. The damping network suppresses noise by a parasitic capacitance between the PCB ground region and the heat sink during high frequency power converter operation.