Abstract: Aspects of the present disclosure disclose a power semiconductor device coupled to a load operable to draw a load current comprising a power switch having a first terminal coupled to the load and a controller coupled to a control terminal of the power switch. The controller comprises a gate driving circuit configured to provide control of the control terminal of the power switch during normal switching operations; an overvoltage detection circuit configured to detect an overvoltage event occurring at the first terminal of the power switch; and an overvoltage protection circuit configured to provide control of the control terminal of the power switch during detection of the overvoltage event.

Abstract: Aspects of the present disclosure disclose a power semiconductor device coupled to a load operable to draw a load current comprising a power switch having a first terminal coupled to the load and a controller coupled to a control terminal of the power switch. The controller comprises a gate driving circuit configured to provide control of the control terminal of the power switch during normal switching operations; an overvoltage detection circuit configured to detect an overvoltage event occurring at the first terminal of the power switch; and an overvoltage protection circuit configured to provide control of the control terminal of the power switch during detection of the overvoltage event.

Abstract: In some embodiments, a power system includes an integrated circuit (IC). The IC includes a first switching transistor having a load path coupled between a sensing terminal of the IC and a first terminal of the IC. The first terminal of the IC is configured to be coupled to a first load path terminal of a second switching transistor. The IC also includes a first diode coupled between the first terminal of the IC and a second terminal of the IC. The second terminal is configured to be coupled to an auxiliary winding of the power system. The IC further includes a first driver circuit having an output coupled to a third terminal of the IC. The third terminal is configured to be coupled to a control node of the second switching transistor.

Abstract: An embodiment method for designing a power converter system includes receiving, by a processor, power converter design parameters. The design parameters include a minimum DC input voltage Vmin and a maximum DC input voltage Vmax, a minimum switching frequency fmin and a maximum switching frequency fmax of a switching bridge of the power converter, and a target output voltage and a target output power. The method also includes calculating, by the processor, a first power converter configuration. The first power converter configuration includes a calculated magnetizing inductance Lmc equal to Re tan(?)(2?fmin)?1, where ? is a load angle complement equal to a sin(VminVmax?1), and Re is an equivalent reflected load resistance of the power converter. The first power converter configuration also includes a calculated resonant inductance Lrc equal to Lmc cos2(?)(fmax2fmin?2?1)?1 and a calculated resonant capacitance Crc equal to Lrc?1(2?fmax)?2.

Abstract: In some embodiments, a power system includes an integrated circuit (IC). The IC includes a first switching transistor having a load path coupled between a sensing terminal of the IC and a first terminal of the IC. The first terminal of the IC is configured to be coupled to a first load path terminal of a second switching transistor. The IC also includes a first diode coupled between the first terminal of the IC and a second terminal of the IC. The second terminal is configured to be coupled to an auxiliary winding of the power system. The IC further includes a first driver circuit having an output coupled to a third terminal of the IC. The third terminal is configured to be coupled to a control node of the second switching transistor.

Abstract: In accordance with an embodiment, a circuit includes a first and a second switching transistors configured to be coupled in series between a first reference voltage terminal and a transformer. The circuit also includes a first diode coupled between a first drain of the first switching transistor and a first input terminal. The first diode is configured to clamp a voltage of the first drain to a voltage of the first input terminal. The circuit further includes a switching circuit coupled between the second switching transistor and the first input terminal. The switching circuit is configured to connect a second source of the second switching transistor to a second gate of the second switching transistor when a voltage of the second source exceeds the voltage of the first input terminal.

Abstract: In accordance with an embodiment, a circuit includes a first and a second switching transistors configured to be coupled in series between a first reference voltage terminal and a transformer. The circuit also includes a first diode coupled between a first drain of the first switching transistor and a first input terminal. The first diode is configured to clamp a voltage of the first drain to a voltage of the first input terminal. The circuit further includes a switching circuit coupled between the second switching transistor and the first input terminal. The switching circuit is configured to connect a second source of the second switching transistor to a second gate of the second switching transistor when a voltage of the second source exceeds the voltage of the first input terminal.

Abstract: An embodiment method for designing a power converter system includes receiving, by a processor, power converter design parameters. The design parameters include a minimum DC input voltage Vmin and a maximum DC input voltage Vmax, a minimum switching frequency fmin and a maximum switching frequency fmax of a switching bridge of the power converter, and a target output voltage and a target output power. The method also includes calculating, by the processor, a first power converter configuration. The first power converter configuration includes a calculated magnetizing inductance Lmc equal to Re tan(?)(2?fmin)?1, where ? is a load angle complement equal to a sin(VminVmax?1), and Re is an equivalent reflected load resistance of the power converter. The first power converter configuration also includes a calculated resonant inductance Lrc equal to Lmc cos2(?)(fmax2fmin?2?1)?1 and a calculated resonant capacitance Crc equal to Lrc?1(2?fmax)?2.

Abstract: A two-transistor flyback converter includes a transformer having a primary side and a secondary side, a first transistor connected between an input voltage source and a first terminal of the primary side, a second transistor connected between ground and a second terminal of the primary side, and a diode directly connected between the first terminal of the primary side and ground. The first and second transistors are operable to switch on and off simultaneously and with no current return from the primary side to the input voltage source when the input voltage source is less than a reflected voltage from the secondary side.

Abstract: An LED driver includes a transformer, current control loop and current adjustment circuit. The primary side of the transformer transfers energy to the secondary side of the transformer responsive to an input signal. The secondary side delivers output current to one or more LEDs at a magnitude corresponding to the amount of energy transferred to the secondary side. The current control loop controls current in the primary side so that the output current equals a reference current signal. The current adjustment circuit injects a current adjustment signal into the current control loop responsive to a phase-cut signal which removes a portion of the input signal. The current control loop also decreases the current in the primary side responsive to the current adjustment signal so that a brightness of each LED connected to the secondary side is decreased by an amount corresponding to the magnitude of the current adjustment signal.

Abstract: An LED driver includes a transformer, current control loop and current adjustment circuit. The primary side of the transformer transfers energy to the secondary side of the transformer responsive to an input signal. The secondary side delivers output current to one or more LEDs at a magnitude corresponding to the amount of energy transferred to the secondary side. The current control loop controls current in the primary side so that the output current equals a reference current signal. The current adjustment circuit injects a current adjustment signal into the current control loop responsive to a phase-cut signal which removes a portion of the input signal. The current control loop also decreases the current in the primary side responsive to the current adjustment signal so that a brightness of each LED connected to the secondary side is decreased by an amount corresponding to the magnitude of the current adjustment signal.

Abstract: A two-transistor flyback converter includes a transformer having a primary side and a secondary side, a first transistor connected between an input voltage source and a first terminal of the primary side, a second transistor connected between ground and a second terminal of the primary side, and a diode directly connected between the first terminal of the primary side and ground. The first and second transistors are operable to switch on and off simultaneously and with no current return from the primary side to the input voltage source when the input voltage source is less than a reflected voltage from the secondary side.

Abstract: An object locating, identifying, tracking, and surveillance system, denoted the Assets Locating, Tracking, and Surveillance System (ALTSS), is provided for managing physical objects and evidence in environments such as police departments, law offices, and the Courts. ALTSS employs radio frequency identification (RFID) technology, computer programming and database applications, networking technologies, and hardware elements. ALTSS may locate and track physical evidence, merchandise, information carriers like files, folders or individual pieces of paper, and people, under certain conditions, in near-real time. It may be configured as part of a local area network, a wide area network, or the Internet. ALTSS may employ exemplary components such as RFID transponders, scanners, strategically located antennas and computers to facilitate tracking of objects and people as needed.

Abstract: An object locating, identifying, and tracking system is provided for managing physical objects and people in environments such as police departments, law offices, the Courts, hospitals, warehouses, and department stores. The system employs RFID technology, computer programming and database applications, networking technologies, and hardware elements. Employing its algorithmic decision machine to develop RFID tag operational state data, the system may provide item-level visibility in locating and tracking physical evidence, merchandise, valued items, people and supply chain items in near-real time. The system may be configured as part of a local area network, a wide area network, or the Internet. It may employ exemplary components such as RFID transponders or tags, scanners, antennas and computers to facilitate tracking of objects and people as needed.

Abstract: An object locating, identifying, and tracking system is provided for managing physical objects and people in environments such as police departments, law offices, the Courts, hospitals, warehouses, and department stores. The system employs RFID technology, computer programming and database applications, networking technologies, and hardware elements. Employing its algorithmic decision machine to develop RFID tag operational state data, the system may provide item-level visibility in locating and tracking physical evidence, merchandise, valued items, people and supply chain items in near-real time. The system may be configured as part of a local area network, a wide area network, or the Internet. It may employ exemplary components such as RFID transponders or tags, scanners, antennas and computers to facilitate tracking of objects and people as needed.

Abstract: An object locating, identifying, tracking, and surveillance system, denoted the Assets Locating, Tracking, and Surveillance System (ALTSS), is provided for managing physical objects and evidence in environments such as police departments, law offices, and the Courts. ALTSS employs radio frequency identification (RFID) technology, computer programming and database applications, networking technologies, and hardware elements. ALTSS may locate and track physical evidence, merchandise, information carriers like files, folders or individual pieces of paper, and people, under certain conditions, in near-real time. It may be configured as part of a local area network, a wide area network, or the Internet. ALTSS may employ exemplary components such as RFID transponders, scanners, strategically located antennas and computers to facilitate tracking of objects and people as needed.

Abstract: An object locating, identifying, tracking, and surveillance system, denoted the Assets Locating, Tracking, and Surveillance System (ALTSS), is provided for managing physical objects and evidence in environments such as police departments, law offices, and the Courts. ALTSS employs radio frequency identification (RFID) technology, computer programming and database applications, networking technologies, and hardware elements. ALTSS may locate and track physical evidence, merchandise, information carriers like files, folders or individual pieces of paper, and people, under certain conditions, in near-real time. It may be configured as part of a local area network, a wide area network, or the Internet. ALTSS may employ exemplary components such as RFID transponders, scanners, strategically located antennas and computers to facilitate tracking of objects and people as needed.