Three-phase interleaved resonant converters with integrated magnetics are described. In various examples, transformers are integrated into a transformer core of a converter. A primary side circuit includes a set of circuit segments corresponding to phases of the three-phase interleaved converter. Each of the circuit segments include an integrated winding component that provides a transformer primary winding and a resonant inductor connected in series.

A power supply may include multiple converters connected in parallel. The power supply may detect a signal that indicates how much power a device uses. Based on the signal, a converter controller may determine which of the multiple converters to activate or deactivate to supply enough power to meet the power load of the device and to operate the highest efficiency possible. The amount of power output from the power supply may be the sum of the power output by each of the converters that is activated. The power supply may use the multiple converters to operate at high efficiency throughout a wide range of power load levels. Such a power supply may achieve a haystack (i.e., near flat) power efficiency curve throughout a large part of its operating range.

A multiphase interleaved forward power converter includes an inductor and first and second subconverter comprising respective transformers. The converter also includes first and second drives configured to respectively operate the first and second subconverters with cycling periods comprising a conduction period, a reset period, and an idle period. The first and second drives are also configured to phase shift the cycling periods in each subconverter such that the conduction period of the subconverter is at least partially complementary to the idle period of the other subconverter. The second drive also clamps a voltage across a winding of the transformer of the first subconverter to substantially prevent a first resonance voltage from propagating in the first subconverter during the idle period of the first subconverter.

An interleaved LLC converter arrangement includes two or more LLC converters for transferring power from an input side to an output side, wherein the two or more LLC converters include a first LLC converter and a second LLC converter connected in parallel on the input side and on the output side and wherein each LLC converter includes a bridge inverter at the input side. For balancing the power transfer among the LLC converters if for example the second LLC converter transfers more power from the input side to the output side than the first LLC converter, each leg of the bridge of the bridge inverter of the first LLC converter is operated with a duty cycle of 0.5 and at least one leg of the bridge of the bridge inverter of the second LLC converter is operated with a duty cycle different from 0.5.

Technologies for controlling AC-to-DC converters are disclosed. In one illustrative embodiment, a controller of an AC-to-DC converter measures two voltage levels of a split voltage bus of a power factor correction (PFC) circuit. The controller controls current drawn from the positive and negative terminals of the PFC circuit by a DC-to-DC converter. By controlling the current drawn from the two terminals, the controller can control the voltages on the terminals to be equal (but opposite).

A power conversion device includes an electronic component, a first printed circuit board, a first cooling body, a second printed circuit board, a second cooling body, and a first wiring member. The power conversion device further includes a first insulating member. On a first main surface of the first printed circuit board, a first joint portion to which the first wiring member is joined is provided. Between a second main surface of the first printed circuit board and the first cooling body, the first insulating member is arranged on a rear surface of at least the first joint portion.

A method and system for balancing output currents of parallel connected first and second DC/DC converters is provided. In operation, the first converter (i) receives, via a communications line connected between the converters such as a CAN bus, a value of the output current of the second converter and (ii) uses this value in weighing an output voltage comparison performed by the first converter for generating the output current of the first converter to thereby adjust the output current of the first converter based on this value. Likewise, the second converter (i) receives, via the communications line, a value of the output current of the first converter and (ii) uses this value in weighing an output voltage comparison performed by the second converter for generating the output current of the second converter to thereby adjust the output current of the second converter based on this value.

Various examples are provided related to parallel-connected resonant converters and their operation. In one example, a system includes a plurality of resonant converters connected in parallel and an output voltage regulator that can generate a common control reference signal provided to each of the plurality of resonant converters. The common control reference signal can be based upon a signal from a single output voltage sensor, where operation of the resonant converters is controlled in response to the common control reference signal. In another example, a method includes monitoring an output voltage of a plurality of resonant converters connected in parallel using a single output voltage sensor; generating a common control reference signal using a signal from the single output voltage sensor; and providing the common control reference signal to each of the resonant converters, where operation of the resonant converters is controlled in response to the common control reference signal.

A DC/DC converter includes an inverter circuit, a transformer, a first rectifier circuit, a second rectifier circuit, and a voltage management circuit. The transformer includes a first primary-side winding, a first secondary-side winding, and a second secondary-side winding. Two terminals of the first primary-side winding are respectively connected to a first output terminal and a second output terminal of the inverter circuit, two terminals of the first secondary-side winding are connected to two input terminals of the first rectifier circuit, and two terminals of the second secondary-side winding are connected to two input terminals of the second rectifier circuit. The voltage management circuit controls an output terminal of the first rectifier circuit, an output terminal of the second rectifier circuit, and an output terminal of the DC/DC converter to be in a first connection relationship in a first sub-cycle of a first working cycle.

A converter includes two switching stages coupled in series between positive and negative input terminals. A control circuit is configured for driving the switching stages based on an output voltage of the converter. A first switching stage includes two switches coupled in series between a positive input terminal and a first node. A capacitor and an inductor are coupled in series between the two switches and a positive output terminal. A third switch is coupled between a node between the capacitor and the inductor and the negative input terminal. A second capacitor is coupled between the first node and the negative input terminal. A second switching stage includes a second node coupled to the first node. Two additional electronic switches are coupled in series between the second node and the negative input terminal. A second inductor is coupled between the two additional switches and the positive output terminal.