Integrated high voltage isolation using low value capacitors
US8988142B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2014 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Mar 5, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/3011
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
High voltage rated isolation capacitors are formed on a face of a primary integrated circuit die. The isolation capacitors AC couple the primary integrated circuit in a first voltage domain to a second integrated circuit in a second voltage domain. The isolation capacitors DC isolate the primary integrated circuit from the second integrated circuit die. Isolated power transfer from the first voltage domain to the second voltage domain is provided through the high voltage rated isolation capacitors with an AC oscillator or PWM generator. The AC oscillator voltage amplitude may be increased for an increase in power through the high voltage rated isolation capacitors, and a larger value capacitor in the second voltage domain may provide for peak current demand from circuits in the second voltage domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.