Opto-coupler with field-shaping end caps
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United States of America Patent
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Jun 22, 2021
Grant Date -
Jul 18, 2019
app pub date -
Sep 25, 2017
filing date -
Sep 26, 2016
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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.
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