The three-level direct current converter includes: a flying capacitor, a plurality of switch groups, a drive circuit, and a control circuit. The control circuit includes at least an on-time generator. When a voltage on the flying capacitor deviates from a half of a power supply voltage, the on-time generator changes a charging current of a capacitor of the on-time generator to adjust an output on-time signal, and outputs the on-time signal to the drive circuit. The drive circuit generates a drive pulse signal based on the on-time signal to drive switch statuses of the plurality of switch groups, to adjust charging time and discharging time of the flying capacitor, where an absolute value of a difference between the voltage on the flying capacitor and the half of the power supply voltage is less than or equal to a preset threshold.

A DC transformer circuit is provided. A first end of an energy storage inductor in the DC transformer circuit is connected with a module output pin in a DC transformer module, and a second end of the energy storage inductor is connected to a grounded terminal. Using the DC transformer circuit can thus generate a negative voltage for a display device. Compared to a DC buck-boost circuit adopted in the existing arts, the DC transformer circuit has an advantage of low cost.

A DC transformer circuit is provided. A first end of an energy storage inductor in the DC transformer circuit is connected with a module output pin in a DC transformer module, and a second end of the energy storage inductor is connected to a grounded terminal. Using the DC transformer circuit can thus generate a negative voltage for a display device. Compared to a DC buck-boost circuit adopted in the existing arts, the DC transformer circuit has an advantage of low cost.

A switched capacitor converter package includes a semiconductor package on a first side of an electrical routing apparatus, a first capacitor and a second capacitor on a second side of the electrical routing apparatus, wherein the first capacitor and the second capacitor are adjacent to each other and connected in parallel, and a third capacitor and a fourth capacitor connected on the second side of the electrical routing apparatus, wherein the third capacitor and the fourth capacitor are adjacent to each other and connected in parallel.

An electrical device is provided with an AC voltage divider that includes a board, a plurality of dividing stages each associated with a dividing ratio, an input terminal arranged on the board for receiving an input voltage, and an output terminal arranged on the board for outputting a divided voltage. Moreover, each dividing stage comprises a plurality of capacitors, and for each dividing stage, the plurality of capacitors of the respective dividing stage is arranged in a same integrated component assembled on the board and electrically connected between the input terminal and the output terminal.

In one example, a switched circuit includes first and second transistors. The first transistor has a first gate and a first source/drain path. The second transistor has a second gate and a second source/drain path. The first and second source/drain paths are coupled in series between an input terminal and an output terminal. A first drive circuit has a first drive input and a first drive output. A second drive circuit has a second drive input and a second drive output. The first drive output is coupled to the first gate, and the second drive output is coupled to the second gate. Switching circuitry is coupled between: at least one of first or second power supply circuits; and at least one of the first or second drive circuits.

An energy combiner apparatus is used to convert output of a power supply, and has three output terminals, so that output ports are increased. In the three output terminals of the energy combiner apparatus, a voltage of 1500 V is output between a first output terminal and a second output terminal, a voltage of 1500 V is also output between the second output terminal and a third output terminal, and a total of 3 kV is output. Therefore, an overall output voltage is increased in a case of equal output power. Because the overall output voltage is increased, a current transmitted on a cable may be reduced. Therefore, a thinner cable may be used, so that costs of the cable are reduced. In addition, four cables conventionally required for connecting to the output terminals of the energy combiner apparatus are reduced to three, so that quantity and costs are reduced.

An energy combiner apparatus is used to convert output of a power supply, and has three output terminals, so that output ports are increased. In the three output terminals of the energy combiner apparatus, a voltage of 1500 V is output between a first output terminal and a second output terminal, a voltage of 1500 V is also output between the second output terminal and a third output terminal, and a total of 3 kV is output. Therefore, an overall output voltage is increased in a case of equal output power. Because the overall output voltage is increased, a current transmitted on a cable may be reduced. Therefore, a thinner cable may be used, so that costs of the cable are reduced. In addition, four cables conventionally required for connecting to the output terminals of the energy combiner apparatus are reduced to three, so that quantity and costs are reduced.

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.

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.