Abstract: An example relates to a method for operating a converter comprising a primary side of a transformer and a secondary side of the transformer, wherein a switching element is used for conveying energy from the primary side to the secondary side, the method comprising (i) determining a voltage drop across the primary side of the transformer; (ii) determining at least one additional voltage drop across at least one component of the converter's primary side; and (iii) determining an input voltage at the converter via the voltage drops.

Abstract: In accordance with an embodiment, a method of operating a power system includes operating a power converter at a first output power, monitoring a first input voltage at an input port of the power converter. The method further includes upon detecting that the first input voltage drops below a first pre-determined voltage threshold, reducing the first output power of the power converter to a second output power lower than the first output power, and suspending operation of the power converter after the reducing the first output power of the power converter.

Abstract: An example relates to a method for operating a converter comprising (i) determining whether a valley for switching the converter in a quasi-resonant mode is available within a predetermined time range; (ii) selecting the valley if it is available within the predetermined time range; and (iii) changing the mode for operating the converter if the valley is not available within the predetermined time range.

Abstract: In accordance with an embodiment, a method of operating a power system includes operating a power converter at a first output power, monitoring a first input voltage at an input port of the power converter. The method further includes upon detecting that the first input voltage drops below a first pre-determined voltage threshold, reducing the first output power of the power converter to a second output power lower than the first output power, and suspending operation of the power converter after the reducing the first output power of the power converter.

Abstract: A system and method for avoiding collisions in a traffic intersection using radar sensors is disclosed. The system detects the location, speed, size, and direction of travel of objects, including vehicles and vulnerable road users, in and approaching a traffic intersection. Using this information, trajectories for all objects are determined, and, if a likelihood of a collision is determined, one or more traffic signal transitions are delayed in an attempt to avoid the collision.

Abstract: An example relates to a method for operating a converter comprising (i) determining whether a valley for switching the converter in a quasi-resonant mode is available within a predetermined time range; (ii) selecting the valley if it is available within the predetermined time range; and (iii) changing the mode for operating the converter if the valley is not available within the predetermined time range.

Abstract: An example relates to a method for operating a converter comprising a primary side of a transformer and a secondary side of the transformer, wherein a switching element is used for conveying energy from the primary side to the secondary side, the method comprising (i) determining a voltage drop across the primary side of the transformer; (ii) determining at least one additional voltage drop across at least one component of the converter's primary side; and (iii) determining an input voltage at the converter via the voltage drops.

Abstract: A system and method for avoiding collisions in a traffic intersection using radar sensors is disclosed. The system detects the location, speed, size, and direction of travel of objects, including vehicles and vulnerable road users, in and approaching a traffic intersection. Using this information, trajectories for all objects are determined, and, if a likelihood of a collision is determined, one or more traffic signal transitions are delayed in an attempt to avoid the collision.

Abstract: Methods, devices, and circuits are disclosed for regulating a first parameter of one or more LEDs. The methods, devices, and circuits further disclose switching, in response to an indication of a dimmer interface, from regulating the first parameter of the one or more LEDs to regulating a second parameter below a light generation threshold of the one or more LEDs, wherein switching from regulating the first parameter to regulating the second parameter causes the one or more LEDs to enter a non-light generation mode.

Abstract: Methods, devices, and circuits are disclosed regulating a first parameter of one or more LEDs. The methods, devices, and circuits may further be disclosed switching, in response to an indication of a dimmer interface, from regulating the first parameter of the one or more LEDs to regulating a second parameter below a light generation threshold of the one or more LEDs, and switching from regulating the first parameter to regulating the second parameter causes the one or more LEDs to enter a non-light generation mode.

Abstract: A power supply including a switching voltage regulator detects a peak power fault if a peak power limit is exceeded during a switching cycle of the voltage regulator. A second fault condition exists if a second power limit, lower than the peak power limit, is exceeded over a second time period, longer than the first time period. The switching voltage regulator is stopped in response to either the first or the second fault condition. Responsive to the second fault condition, the switching voltage regulator may be stopped until AC power is cycled or until a predetermined time period has elapsed.

Abstract: A power supply including a switching voltage regulator detects a peak power fault if a peak power limit is exceeded during a switching cycle of the voltage regulator. A second fault condition exists if a second power limit, lower than the peak power limit, is exceeded over a second time period, longer than the first time period. The switching voltage regulator is stopped in response to either the first or the second fault condition. Responsive to the second fault condition, the switching voltage regulator may be stopped until AC power is cycled or until a predetermined time period has elapsed.

Abstract: An electronic ballast having a through-lamp ground fault sensor that may also function as an end-of-lamp-life sensor is disclosed. The electronic ballast has an inverter that receives power from a dc power supply, and delivers a high-frequency output voltage to a resonant tank circuit through a dc blocking capacitor. The ground fault sensor includes a filter circuit connected to a voltage sensor circuit. An input terminal of the filter circuit is connected to the resonant tank so as to be in communication with a voltage signal that exists between a ballast output terminal and a dc power supply output terminal. The filter provides a filtered voltage signal by attenuating high frequency ac voltage components of the voltage signal, and passing low frequency ac voltage components, such as a 60 Hz signal, and possibly also passing a dc voltage component. A through-lamp ground fault will generate a voltage signal at the power line frequency.