A driver circuit is configured to control a power transistor. The driver circuit comprises a signal generator configured to generate a control signal for the power transistor based on a supply signal and an input signal from a control unit. In addition, the driver circuit includes a ripple detector configured to receive the supply signal and determine whether the supply signal includes a ripple error. In some examples, the ripple detector may be configured to send a warning signal to the control unit in response to detecting the ripple error.

For a programmable direct current (DC)-DC converter application, a driver system includes a switched mode power circuit for providing a DC power signal to an electrical load and a control block. Control block includes interfaces coupled to receive at least one real-time input signal from a low voltage region of the switched mode power circuit and to provide at least one control signal to the low voltage region. Control block configures the switched mode power circuit to provide the DC power signal having at least one power parameter within a tolerance of a power configuration setting value of the electrical load. Control block responds to the at least one real-time input signal from the low voltage region to adjust operation of the low voltage region via the at least one control signal. Low voltage region can include a plurality of switched converter circuits.

A power conversion device includes a power supply, a converter, a current detection circuit, and a control circuit. The power supply includes positive and negative terminals. The converter includes a primary side and a secondary side. The converter is configured to output a first current to a load. The primary side is electrically connected to the positive terminal and the negative terminal of the power supply in parallel. The secondary side is electrically connected to the positive terminal of the power supply and the load in series. The current detection circuit is coupled between the secondary side and the load, and is configured to detect the first current to output a current detection signal. The control circuit is coupled to the current detection circuit for outputting a control signal to the converter according to the current detection signal and a reference current signal.

The present disclosure provides a high-performance power supply of a wide output voltage range and a control method thereof. The high-performance power supply of a wide output voltage range includes M rectification branches and a serial to parallel conversion module. The technical solution of the present disclosure solves the problem in the prior art that it is still difficult to obtain a good performance within a full output voltage range under a wide output voltage requirement.

Various embodiments are directed to a switch circuit comprising: two terminal nodes, comprising an upper node and a lower node; a plurality of switch modules, connected in series between the upper node and the lower node, wherein each of the switch modules comprises a switch, a rectifier, and a capacitor; a connecting circuit, coupled to the switch modules; and a power converter, coupled to the connecting circuit and to a power sink. The switch circuit is configured to limit a voltage or a component of a voltage in the switch circuit, and to recover power from the limiting of the voltage, wherein recovering the power comprises diverting power from the switch modules via the connecting circuit to the power converter, and the power converter outputting the power to the power sink.

System controller and method for regulating a power converter. For example, the system controller includes a first controller terminal and a second controller terminal. The system controller is configured to receive an input signal at the first controller terminal and generate a drive signal at the second controller terminal based at least in part on the input signal to turn on or off a transistor in order to affect a current associated with a secondary winding of the power converter. Additionally, the system controller is further configured to determine whether the input signal remains larger than a first threshold for a first time period that is equal to or longer than a first predetermined duration.

The present disclosure provides a power supply apparatus, a charging method, and an electronic device system. The power supply apparatus comprises a first-stage conversion circuit, a second-stage conversion circuit, and a valley-fill circuit. The first-stage conversion circuit is used for converting a rectified DC voltage to obtain a first DC voltage; the second-stage conversion circuit is used for converting the first DC voltage and outputting a second DC voltage, the second DC voltage being lower than the voltage value of the first DC voltage; the valley-fill circuit is used, if the second DC voltage is lower than a set value, for supplying power to the output end of the power supply apparatus so that the output voltage of the power supply apparatus is a constant DC voltage. The present disclosed technical solution is capable of reducing the size of a power supply apparatus.

Multi-port power adapters. At least one example is a method including: supplying a first bus voltage to a first device by way of a DC-DC converter coupled to a link voltage; supplying a second bus voltage to a second device by way of a second DC-DC converter coupled to the link voltage; converting an AC voltage to the link voltage by way of an AC-DC converter; selecting, by a shunt regulator, a setpoint for the link voltage based on the first bus voltage and the second bus voltage; and regulating the link voltage to the setpoint by the AC-DC converter.

A power supply device includes a transformer, a first rectifier, a first voltage conversion module, a second voltage conversion module, and a control unit. The first rectifier, connected to a primary winding of the transformer, converts a received alternating-current voltage to a first direct-current voltage. The first voltage conversion module is connected to the first secondary winding of the transformer. The second voltage conversion module is connected to the second secondary winding of the transformer. The control unit, connected to the first voltage conversion module and second voltage conversion module, controls the first voltage conversion module or second voltage conversion module to adjust an output voltage or an output current of the power supply device.

The converter includes: an input direct current (DC) power supply, a main power transistor, an auxiliary power transistor, a first capacitor, a transformer, and a controller. The first capacitor is connected in series to the transformer to form a series circuit. The series circuit is connected in parallel to the auxiliary power transistor. A source of the main power transistor is connected to a drain of the auxiliary power transistor. A source of the auxiliary power transistor is connected to another electrode of the input DC power supply. An input negative electrode of the input DC power supply is grounded. The controller is configured to: monitor a value of a current on the transformer to obtain a quantity of times that the value of the current on the transformer reaches a specified current threshold.