Opto-coupler with field-shaping end caps
US11043479B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2017 |
| Grant date | Jun 22, 2021 |
| Priority date | — |
| Expiry date | Feb 25, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F77/413
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
An opto-coupler includes a housing having end walls configured to have high-voltage (HV) input and output conductors protruding therethrough. The opto-coupler also includes at least one light emitting diode (LED) mounted to the housing and configured to activate the HV diode to pass electrical current by emitting light toward the HV diode. At least one press-fit end cap is configured to provide a press-fit seal either between the HV input conductor and the input end wall or between the HV output conductor and the output end wall. The press-fit end cap is configured to protect the LED from damage by shaping an electric field between the HV input or output conductor and the LED. Embodiments enable compact opto-coupler sizes with high-voltage ratings, such as 8 kV or 15 kV. Electrical current transfer ratios may be much higher than in existing opto-couplers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.