Reinforced isolation for current sensor with magnetic field transducer
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United States of America Patent
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Dec 9, 2014
Grant Date -
Jan 24, 2013
app pub date -
Jul 22, 2011
filing date -
Jul 22, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A current sensor packaged in an integrated circuit package to include a magnetic field sensing circuit, a current conductor and an insulator that meets the safety isolation requirements for reinforced insulation under the UL 60950-1 Standard is presented. The insulator is provided as an insulation structure having at least two layers of thin sheet material. The insulation structure is dimensioned so that plastic material forming a molded plastic body of the package provides a reinforced insulation. According to one embodiment, the insulation structure has two layers of insulating tape. Each insulating tape layer includes a polyimide film and adhesive. The insulation structure and the molded plastic body can be constructed to achieve at least a 500 VRMS working voltage rating.
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