A transformer for a DC-DC converter, such as a resonant converter, is provided. The converter includes a transformer unit that includes at least one winding with a first winding connection and a second winding connection, and a capacitor assembly consisting of at least one capacitor with a first capacitor assembly connection and a second capacitor assembly connection. The capacitor assembly is arranged so as to lie against the transformer unit in order to form an assembly. The capacitor assembly connections are connected to the winding connections via one or more first connection parts in a specified manner with respect to the electric connections. The capacitor assembly connections and/or the winding connections are electrically connected to multiple second connection parts in a specified manner with respect to the electric connections for connecting to a first power module and a second power module.

A multi-stage radio frequency power amplifier (RFPA) includes an output stage SMPA and a driver stage SMPA. As the multi-stage RFPA operates, the magnitude of an RF switch drive signal generated by the driver stage SMPA is dynamically minimized based on I-V characteristic curves of the output stage SMPA's power transistor and the output stage SMPA's dynamically changing load line. By constraining the magnitude of the RF switch drive signal as the multi-stage RFPA operates, VGS feedthrough of the RF switch drive signal is minimized, to the extent possible. Amplitude distortion and phase distortion in the RF output that might occur due to unconstrained VGS feedthrough, particularly at low output RF power levels, are therefore avoided. Operating all stages of the multi-stage RFPA in switch mode also results in high energy efficiency and an output RF spectrum with very low wideband noise (WBN).

A transformer for a DC-DC converter, such as a resonant converter, is provided. The converter includes a transformer unit that includes at least one winding with a first winding connection and a second winding connection, and a capacitor assembly consisting of at least one capacitor with a first capacitor assembly connection and a second capacitor assembly connection. The capacitor assembly is arranged so as to lie against the transformer unit in order to form an assembly. The capacitor assembly connections are connected to the winding connections via one or more first connection parts in a specified manner with respect to the electric connections. The capacitor assembly connections and/or the winding connections are electrically connected to multiple second connection parts in a specified manner with respect to the electric connections for connecting to a first power module and a second power module.

A transformer for a DC-DC converter, such as a resonant converter, is provided. The converter includes a transformer unit that includes at least one winding with a first winding connection and a second winding connection, and a capacitor assembly consisting of at least one capacitor with a first capacitor assembly connection and a second capacitor assembly connection. The capacitor assembly is arranged so as to lie against the transformer unit in order to form an assembly. The capacitor assembly connections are connected to the winding connections via one or more first connection parts in a specified manner with respect to the electric connections. The capacitor assembly connections and/or the winding connections are electrically connected to multiple second connection parts in a specified manner with respect to the electric connections for connecting to a first power module and a second power module.

A device for power factor correction can include a converter housing having an inner surface; a first converter substrate mounted on the inner surface of the converter housing; a second converter substrate mounted on another surface of first converter housing opposite to the inner surface; and a housing cover covering the first converter substrate and coupled to an upper surface of the converter housing, in which the second converter substrate includes a first surface having a first region including a source pad, and a second region including a drain pad spaced apart from the source pad, the source pad including a source pad extension portion extending into the second region; and a second surface including a heat dissipation pad for communicating heat from the source and drain pads to an outside of the device, in which the first region of the second converter substrate overlaps with the another surface of first converter housing, and the second region of the second converter substrate faces the housing cover without overlapping with the first converter substrate.

A power converter system includes a first transformer winding. A switch is operatively connected between the first transformer winding and ground for controlling the first transformer winding. A holdup charging circuit includes a clamp circuit connected between a first node on a first side of the first transformer winding and a second node on a second side of the first transformer winding. The clamp circuit includes a clamp diode oriented to let current flow through the clamp circuit in a direction from the first node to the second node. The clamp circuit includes a clamp capacitor in series between the clamp diode and the second node. A holdup circuit, including a holdup capacitor, is connected to a third node in the clamp circuit between the clamp diode and the clamp capacitor.

A system comprises an input power stage coupled to a primary side of a transformer, an output power stage coupled to a secondary side of a transformer, a first common node capacitor and a common node resistor connected in series between a midpoint of the secondary side of the transformer and ground and a detector having an input connected to a common node of the first common node capacitor and the common node resistor, and an output connected to a control circuit, wherein the control circuit is configured to dynamically adjust a switching frequency of the system based upon an output of the detector.

A system comprises an input power stage coupled to a primary side of a transformer, an output power stage coupled to a secondary side of a transformer, a first common node capacitor and a common node resistor connected in series between a midpoint of the secondary side of the transformer and ground and a detector having an input connected to a common node of the first common node capacitor and the common node resistor, and an output connected to a control circuit, wherein the control circuit is configured to dynamically adjust a switching frequency of the system based upon an output of the detector.

A system comprises an input power stage coupled to a primary side of a transformer, an output power stage coupled to a secondary side of a transformer, a first common node capacitor and a common node resistor connected in series between a midpoint of the secondary side of the transformer and ground and a detector having an input connected to a common node of the first common node capacitor and the common node resistor, and an output connected to a control circuit, wherein the control circuit is configured to dynamically adjust a switching frequency of the system based upon an output of the detector.

A system comprises an input power stage coupled to a primary side of a transformer, an output power stage coupled to a secondary side of a transformer, a first common node capacitor and a common node resistor connected in series between a midpoint of the secondary side of the transformer and ground and a detector having an input connected to a common node of the first common node capacitor and the common node resistor, and an output connected to a control circuit, wherein the control circuit is configured to dynamically adjust a switching frequency of the system based upon an output of the detector.