Abstract: In examples, a circuit comprises a transformer including first and second windings forming an isolation barrier. The circuit includes a first controller coupled to the second winding, a rectifier, and an output of the circuit, the first controller configured to generate a signal indicating a voltage on the output. The circuit comprises a second controller coupled to the first winding and switches and separated from the first controller by the isolation barrier, the second controller configured to operate the switches to have a capped, variable duty cycle, to have an uncapped, variable duty cycle, or to maintain the voltage within a hysteresis band, responsive to the signal.

Abstract: A power converter includes an isolator having a first terminal, a second terminal, a third terminal, and a fourth terminal. A first circuit has a first terminal coupled to the first terminal of the isolator and has a second terminal coupled to the second terminal of the isolator. A second circuit has a first terminal coupled to the third terminal of the isolator and has a second terminal coupled to the fourth terminal of the isolator. The second circuit includes a controller configured to transmit a control signal through the isolator to the first circuit. The control signal includes a first indication to turn on power transmission through the isolator from the first circuit to the second circuit, a second indication of a status, and a third indication to turn off power transmission.

Abstract: A packaged IC includes a package substrate including first and second metal planes on first and second sides, respectively, the second side opposing the first side, and a transformer laterally between the first and second metal planes, the transformer including a primary winding and a secondary winding, the primary winding includes outer primary-coil portions having first and second primary side terminals and an inner primary-coil portion, and the secondary winding includes outer secondary-coil portions having first and second secondary terminals and an inner secondary-coil portion. The packaged IC includes first and second dies on the first and second sides, respectively; first metal posts coupled between the first die and respective overlapping parts of the first metal plane, the primary terminals, and the inner primary-coil portion; and second metal posts coupled between the second die and respective overlapping parts of the second metal plane, the secondary terminals, and the inner secondary-coil portion.

Abstract: A control architecture that overcomes limitations of conventional ac-dc converters and enables bidirectional active and reactive power processing is provided. In one implementation, for example, this may be achieved through the use of unrectified sensed ac signals in the generation of the control commands for the converter. This control architecture, in this example implementation, eliminates or at least reduces zero crossing distortions in the ac current of the converter even with relatively low bandwidth controllers. The concept can be applied to different power stage topologies.

Abstract: A systematic procedure for the synthesis of hybrid feedforward control architectures for pulse-width modulated (PWM) switching converters is provided. In this hybrid feedforward control architecture selected converter variables are sensed and utilized in a particular way based on the converter open-loop characteristics to determine the duty-cycle needed to achieve a control objective. Compared to standard feedback control techniques, advantages can include simpler controller implementation, more convenient sensing, and improved static and dynamic regulation. An example systematic procedure for developing hybrid feedforward controllers is illustrated by first considering a previously known example of hybrid feedforward control: hybrid feedforward control of a boost power factor correction (PFC) rectifier operating in discontinuous conduction mode (DCM).

Abstract: A control architecture that overcomes limitations of conventional ac-dc converters and enables bidirectional active and reactive power processing is provided. In one implementation, for example, this may be achieved through the use of unrectified sensed ac signals in the generation of the control commands for the converter. This control architecture, in this example implementation, eliminates or at least reduces zero crossing distortions in the ac current of the converter even with relatively low bandwidth controllers. The concept can be applied to different power stage topologies.

Abstract: A systematic procedure for the synthesis of hybrid feedforward control architectures for pulse-width modulated (PWM) switching converters is provided. In this hybrid feedforward control architecture selected converter variables are sensed and utilized in a particular way based on the converter open-loop characteristics to determine the duty-cycle needed to achieve a control objective. Compared to standard feedback control techniques, advantages can include simpler controller implementation, more convenient sensing, and improved static and dynamic regulation. An example systematic procedure for developing hybrid feedforward controllers is illustrated by first considering a previously known example of hybrid feedforward control: hybrid feedforward control of a boost power factor correction (PFC) rectifier operating in discontinuous conduction mode (DCM).