The present disclosure discloses a charging system, a charging method and a power adapter. The system includes a power adapter and a terminal. The power adapter includes a first rectifier, a switch unit, a transformer, a second rectifier, a sampling unit, a control unit and a first isolation unit. The control unit outputs a control signal to the switch unit, and adjusts a duty ratio of the control signal according to a current value and/or voltage value sampled by the sampling unit, such that a third voltage with a third ripple waveform outputted by the second rectifier meets a charging requirement. The terminal includes a battery. When the terminal is coupled to the power adapter, the third voltage is applied to the battery.

A transformer includes: a core having a central arm and first and second outer arms on opposite sides of the of the central arm; a primary winding surrounding the central arm; a secondary winding surrounding the central arm; a primary winding shield surrounding the primary winding including a center tap connection connected to an output power connection; and a secondary winding shield surrounding the secondary winding including a center tap connection connected to an output power connection is disclosed. The transformer also includes a DC-to-AC converter connected to the primary winding that includes a primary bias power supply, a primary conversion element and a primary controller, an AC-to-DC converter connected to the secondary winding, a sensor connected to an output of the AC-to-DC converter and a secondary bias power supply that receives power from the secondary winding shield.

An insulation type step-down converter includes first and second step-down transformers each of which includes an input-side coil and an output-side coil. An intermediate portion of the output-side coil of the first step-down transformer and an intermediate portion of the output-side coil of the second step-down transformer are connected to each other. First, second, third, and fourth rectifier elements are connected in series with first, second, third, and fourth output-side coils, respectively. Smoothing coils are connected to the first to fourth output-side coils. The first, second, third, and fourth rectifier elements are connected such that electric currents flow simultaneously in the first output-side coil and the third output-side coil, and electric currents flow simultaneously in the second output-side coil and the fourth output-side coil in a manner alternating with the electric currents in the first output-side coil and the third output-side coil.

A charging system, a charging method, and a power adapter are provided. The power adapter includes a battery, a first rectification unit, a transformer, a synthesis unit, a first charging interface, a sampling unit, and a modulation and control unit. The modulation and control unit is configured to modulate a voltage of a first pulsating waveform according to a voltage sampling value obtained by the sampling unit, such that a second AC output from the synthesis unit meets charging requirements.

A switching power supply unit includes an N-number (N: an integer of 2 or greater) of transformers; an N-number of inverter circuits; a rectifying smoothing circuit including a {2(N+1)}-number of rectifying devices, a choke coil, and a capacitor; an additional winding disposed to be interlinked with each of magnetic paths formed in the N-number of transformers; and a driver. In the rectifying smoothing circuit, a (N+1)-number of arms each have two of the rectifying devices, and are disposed in parallel to one another between the pair of output terminals, a secondary winding in each of the N-number of transformers is coupled between adjacent ones of the (N+1)-number of arms to individually form an H-bridge coupling, and the additional winding is coupled in series to one or more of the secondary windings in the N-number of transformers.

The present disclosure discloses a charging system and a charging method and a power adapter. The system includes a battery, a first rectifier, a switch unit, a transformer, a second rectifier, a sampling unit and a control unit. The control unit outputs a control signal to the switch unit, and adjusts a duty ratio of the control signal according to a current sampling value and/or a voltage sampling value sampled by the sampling unit, such that a third voltage with a third ripple waveform outputted by the second rectifier meets a charging requirement. The third voltage is configured to be introduced into the battery.

A magnetic energy-transfer element including: a core of the magnetic energy-transfer element; an input winding wound around the core of the magnetic energy-transfer element, a first terminal of the input winding being connected to a first terminal of the input filter capacitor, a second terminal of the input winding being connected to a first terminal of the switching element; an output winding wound around the core of the magnetic energy-transfer element to take out energy; and a cancellation winding wound around the core of the magnetic energy-transfer element.

The present invention relates to a transmitter and power supply which suffers little EMI deviation and provides adequate margin even in volume production, and which can cut the unit price of transformers and economize on the costs of EMI filters, by cancelling out and eliminating the conducted noise or the conducted noise and radiated noise caused by capacitive coupling between the windings of a transformer, the transformer being of an uncomplicated construction which is good in terms of production.

An embodiment relates to an integrated circuit comprising at least two electrical connections and at least one coil arranged adjacent to at least one of the electrical connection, wherein the at least one coil each comprises at least one winding and wherein the at least one coil is arranged on or in the integrated circuit.

A converter module includes: a system board; and an isolated rectifier unit connected with the system board via at least one pin, the isolated rectifier unit including: a magnetic core including at least one core column parallel to the system board and two cover plates provided at both ends of the core column; and multiple carrier board units provided between the two cover plates and perpendicular to the system board, wherein the carrier board unit includes at least one via hole, at least one primary winding and at least one secondary winding; and wherein the at least one core column passes through the via hole of the carrier board unit, the pin is provided at one side of at least one of the carrier board units close to the system board and configured to connect the carrier board units with the system board.