公开(公告)号：US09913356B2

公开(公告)日：2018-03-06

申请号：US15127691

申请日：2014-06-16

Applicant: Robert Bosch GmbH

Inventor： Cyrous Rostamzadeh ,  Shijie Wang ,  Rajesh Das ,  Steven Gladstein ,  Timothy Foster ,  Allen Marecki ,  Sanjai Master

IPC: H02M1/00 ,  H05B41/28 ,  H02M1/12 ,  H02M1/42 ,  H02M1/44 ,  H05B37/02 ,  H05B41/24 ,  H02M7/00 ,  H05K1/02

CPC classification number: H05B41/2806 ,  H02M1/12 ,  H02M1/42 ,  H02M1/44 ,  H02M7/003 ,  H02M2001/123 ,  H05B37/0272 ,  H05B41/24 ,  H05K1/0234 ,  Y02B20/22

Abstract: 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.