Signify Holding B.v.

Harshitha Gudipati

Yuhong Fang

Yang Liu

Mark Ciolek

George Gruev

A method for detecting error on an input/output (IO) pin of an integrated circuit includes using the input/output pin of the integrated circuit in a first mode by receiving or sending a first value as analog data or digital data. The input/output pin is toggled in a test mode after each instance of using the input/output pin in the first mode. The test mode includes providing a second value disparate from the first value during a set time after using the input/output pin in the first mode, receiving back during the set time a resulting value based on providing the second value, measuring the resulting value, and identifying an error on the input/output pin of the integrated circuit based on the measured resulting value.

Error detection on integrated circuit input/output pins

A lighting driver () receives an AC Mains voltage (), employs a rectifier () to produce a rectified voltage, and supplies an output current () to a lighting device () in response to the rectified voltage. A surge protection circuit () of the lighting driver includes a voltage clamping device (MOV) connected across the output of the rectifier, and a differentiator circuit () configured to differentiate between a temporary voltage spike at the input to the rectifier and a loss of neutral connection to the lighting driver. When a temporary voltage spike is detected, the voltage clamping device is activated to clamp the rectified voltage until the temporary voltage spike ends. When a loss of neutral is detected, the voltage clamping device is latched into a disabled state until the AC Mains voltage input to the lighting driver is turned off.

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Prospect Heights, IL, United States of America

Harshitha Gudipati