Integrated device providing overcurrent and overvoltage protection and common-mode filtering to data bus interface
First Claim
1. An electrical component comprising a substrate adapted for surface mounting and connection to a host printed circuit board forming a bus interface circuit, the component including a common-mode rejection filter mounted to the substrate and at least one circuit protection element, the substrate including a plurality of connection electrodes including filter electrodes connected to the filter and protection electrodes connected to the protection element, the electrodes for enabling direct mechanical and electrical connection of the component to the host printed circuit board.
2 Assignments
0 Petitions
Accused Products
Abstract
An electrical component includes a mounting substrate, a common-mode rejection filter mounted to the substrate, and at least one circuit protection element mounted to or formed by the substrate. The circuit protection element may provide a PPTC resistor element for overcurrent protection and/or a spark gap NTC element for overvoltage protection. The substrate includes a plurality of contacts including filter contacts connected to the common-mode rejection filter, and protection contacts connected to the protection element, the electrodes enabling surface mounting and connection of the component to aligned connection features of a host printed circuit board.
76 Citations
22 Claims
- 1. An electrical component comprising a substrate adapted for surface mounting and connection to a host printed circuit board forming a bus interface circuit, the component including a common-mode rejection filter mounted to the substrate and at least one circuit protection element, the substrate including a plurality of connection electrodes including filter electrodes connected to the filter and protection electrodes connected to the protection element, the electrodes for enabling direct mechanical and electrical connection of the component to the host printed circuit board.
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12. An electrical device comprising:
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a flat substrate having a top major surface and a bottom major surface substantially coplanar therewith, the bottom major surface adapted to be surface-mounted to a host printed circuit board, first, second, third, fourth, fifth and sixth spaced-apart surface mount contact sets wherein a contact set includes a contact pad formed on the top major surface and an interconnected contact pad formed on the bottom major surface, an overcurrent protection element connected between first and second contact sets, and a multi-winding common-mode rejection filter element located at the top major surface and having a first winding connected between the third and fourth contact sets and a second winding connected between the fifth and sixth contact sets. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An electrical component for a circuit supporting a powered data interface comprising:
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(1) a flat substrate having;
(a) a top major surface and a bottom major surface substantially coplanar therewith, (b) a pattern of electrically conductive top traces defined on the top major surface, (c) a pattern of electrically conductive bottom traces defined on the bottom major surface for electrically connecting the component to a host printed circuit board providing the powered data interface, (d) vias passing through the substrate for interconnecting separate ones of the top traces to separate ones of the bottom traces to form overcurrent protection electrodes and filter electrodes, (e) a layer of polymeric positive temperature coefficient (PPTC) resistor material forming an overcurrent protection element for protecting a power supply to the data interface bus against overcurrent and connected to the overcurrent protection electrodes, and (f) insulating material for isolating the filter electrodes from the overcurrent protection element, and (2) a common-mode noise rejection filter element located at the top major surface and connected to the filter electrodes for protecting data lines of the powered data interface against common-mode interference. - View Dependent Claims (19, 20, 21, 22)
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Specification