Abstract: A first module includes a first switch having a first electrode and a second electrode; a second switch having a third electrode and a fourth electrode; a second internal bus bar connecting the second electrode with the third electrode; and a first resin member encapsulating those components. A second module with includes a third switch having a fifth electrode and a sixth electrode; a fourth switch having a seventh electrode and an eighth electrode; a fifth internal bus bar connecting the sixth electrode with the seventh electrode; and a second resin member encapsulating those components. At least one of a first terminal of the second internal bus bar exposed from the first resin member and a second terminal of the fifth internal bus bar exposed from the second resin member extends toward the other and are directly joined with each other.

Abstract: The present invention discloses a high step-down modular DC power supply, belonging to the field of power electronics technology, and the high step-down modular DC power supply includes an upper modular cascade circuit string, a lower modular cascade circuit string, a load, and an input source, where the upper modular cascade circuit string includes i upper sub-module circuits, and the lower modular cascade circuit string includes j lower sub-module circuits. A combination manner of module circuits includes: upper module string cascading, lower module string cascading, and hybrid cascading of the upper module string and the lower module string. The power supply is formed to be a high voltage step-down ratio power supply with high voltage direct current input and low voltage direct current output through modular cascading.

Abstract: A method involves determining that a power converter is in a discontinuous, no-load, or ultra-light load mode of operation. In response, a voltage amplitude of a feedback signal of the power converter rises towards a voltage amplitude that is greater than or equal to a first threshold voltage level. Upon determining that the voltage amplitude of the feedback signal is greater than or equal to the first threshold voltage level, a first enabling pulse is issued to a primary side switch of the power converter to reduce a voltage amplitude of the feedback signal. Upon determining that the voltage amplitude of the feedback signal is greater than or equal to a second threshold voltage level, a normal mode of operation of the power converter is entered.

Abstract: A converter (145) is described comprising: a first input terminal (150) and a second input terminal (155), a first output terminal (165) and a second output terminal (170) connectable to opposite ends of the electrical load (110), a first electric branch (201) adapted to connect the first input terminal (150) with a first intermediate electrical node (202), a second electric branch (203) adapted to connect the first intermediate electrical node (202) with the second input terminal (155), a third electric branch (205) adapted to connect the first output terminal (165) with a second intermediate electrical node (206), a fourth electric branch (207) adapted to connect the second intermediate electrical node (206) with the second output terminal (170), a first active switch (180) placed on the second electric branch (203) and having a first conduction terminal (185) and a resonant circuit (200) sized to reduce the electric voltage and/or electric current applied to said first active switch at least in the moments

Abstract: Devices and methods are provided for controlling dead-time of a direct current to direct current (DC-DC) converter. A control circuit includes a first transistor having a source/drain terminal coupled to an output voltage of the DC-DC converter configured to provide current based on the output voltage. The control circuit also includes a digital up/down counter having an output terminal electrically coupled to an input terminal of a delay cell of the DC-DC converter. A current sensing circuit of the control circuit is electrically coupled to an input terminal of the digital up/down counter configured to receive the current and drive the digital up/down counter based on the current.

Abstract: A linear voltage regulator includes a first driver stage coupled between the error amplifier and the pass transistor of the regulator. A first transistor of the first driver stage has a gate terminal connected to receive the error signal from the error amplifier. A gate terminal of the pass transistor is coupled to receive an output of the first driver stage. The linear voltage regulator includes a compensation circuit for frequency compensation, and a compensation adjustment circuit. The compensation adjustment circuit in the regulator senses a magnitude of the current through the first transistor of the first driver stage, and adjusts a parameter of the compensation circuit based on the magnitude of the sensed current. Sensing the current at the first driver stage provides an indication of the load current drawn from the regulator, and is used for controlling the location of a compensating zero introduced by the compensation circuit.

Abstract: The DC/DC converter circuit includes: a primary-side circuit configured to convert DC power from a DC power source into a pulse voltage; an isolation transformer configured to transform the pulse voltage while isolating the pulse voltage; a secondary-side circuit connectable in a switching manner by a switching circuit to one of a rectifier circuit for a high-voltage low-current output mode or a current doubler circuit for a low-voltage high-current output mode; and a control circuit configured to perform connection switching control of the switching circuit so as to establish, depending on target supply power, connection to the rectifier circuit in the high-voltage low-current output mode, and connection to the current doubler circuit in the low-voltage high-current output mode.

Abstract: A switched capacitor converter includes a first leg between ground and a first voltage node, a second leg between ground and a second voltage node, a first flying capacitor connected between a first switch common node and a third switch common node of the first leg, a second flying capacitor connected between a first switch common node and a third switch common node of the second leg, a third flying capacitor connected between the first voltage node and the second voltage node, a first upper switch connected between the first voltage node and ground, and a second upper switch connected between the second voltage node and an input terminal.

Abstract: A switching converter and a low-voltage startup circuit is provided. The low-voltage startup circuit includes a comparator and a substrate voltage control module. The comparator performs a comparison between an input voltage and a reference voltage and obtain a voltage detection signal according to a result of the comparison. The substrate voltage control module adjusts a substrate voltage of a main switching transistor according to the voltage detection signal, wherein when the voltage detection signal indicates that the input voltage is lower than/equal to the reference voltage, the substrate voltage control module increases the substrate voltage of the main switching transistor, and then a turn-on threshold voltage of the main switching transistor can be reduced, so that the main switching transistor may be normally turned on when the input voltage is low, and the low-voltage startup capability of the switching converter is improved.

Abstract: Circuits and methods for reducing lagging responses of a power converter to changes in circuit voltages or current, over-shoot/under-shoot when a target output voltage changes faster than the power converter's response, and open loop conditions. Embodiments include scanning a feedback voltage from a load powered by a voltage output by a power converter controlled by a PWM control signal; detecting an under-regulation condition; and, while the under-regulation condition is detected, increasing a clock signal rate to a counter outputting a count value usable to generate the PWM control signal. Embodiments include comparing a target output voltage to a signal representative of an output voltage of the power converter; indicating an under-shoot or over-shoot condition if the voltage difference exceeds a corresponding offset value; and limiting the range of values for an M-bit count value used to generate the PWM control signal to mitigate the under-shoot or over-shoot condition.

Abstract: Provided is a DC/DC converter capable of providing overvoltage protection reliably without being affected by, for example, an external element connected to an output terminal. The DC/DC converter includes a comparator, an RS-FF circuit, a drive circuit, and an ON-timer circuit, and the ON-timer circuit includes: a current source circuit which provides an electric current based on a power supply voltage; a ripple generation circuit which generates a ripple voltage; an averaging circuit which averages the ripple voltage; a timer circuit which generates an ON-timer signal; and an overvoltage protection circuit (clamp circuit).

Abstract: The present description concerns a device for delivering a voltage from an AC voltage, comprising a capacitive element (120), two switches (132H, 132L) in a half-bridge between terminals of the capacitive element (120); terminals (102, 104) of application of the AC voltage; a transformer (160), comprising a first winding (162) coupling to a junction node (136) between the switches (132H, 132L) one of the terminals (104) of application of the AC voltage; and one or a plurality of circuits (170, 180, 140), configured to switch the switches (132H, 132L) and receive an AC current (I164) flowing through a second winding (164) of the transformer (160) and regulate the voltage delivered by the device by acting on a frequency of said AC current and/or on a phase shift of said AC current with respect to its reception.

Abstract: Disclosed are an isolation type power conversion method based on demagnetization iteration control and a power conversion circuit. The power conversion circuit comprises a high-frequency transformer, wherein a primary side of the high-frequency transformer is electrically connected with a primary side power tube in a power switch tube circuit, a secondary side of the high-frequency transformer is electrically connected with a charging capacitor circuit and an output feedback circuit through a secondary side synchronous rectifier tube, and the primary side and the secondary side of the high-frequency transformer are electrically connected with a power conversion integrated control chip.

Abstract: A power conversion device includes a power converter including a plurality of arms and a control device to control voltages of a plurality of sub modules by PWM control using a carrier signal for each sub module. The sub module includes a plurality of switching elements, a power storage element, a pair of output terminals, and a bypass switch. When the control device detects failure of a sub module in an arm, it performs stop processing for stopping a switching operation of the plurality of switching elements included in at least one sub module of the plurality of sub modules in the arm and has the sub module failure of which was detected bypassed. After the control device performs the stop processing, it equalizes intervals among phases of carrier signals of a plurality of normal sub modules in the arm caused by failure of the sub module.

Abstract: An inductive-load control circuit includes a circuit board on or in which a controller and a driving circuit are disposed, an inductive load disposed at a location apart from the circuit board and connected to the driving circuit of the circuit board, a detection resistor group included in the driving circuit and connected in series with the inductive load, and a temperature measuring element. The detection resistor group includes resistors. The temperature measuring element is disposed between the resistors. The controller and the driving circuit are supplied with electric power by a power supply. The driving circuit controls the electric power supplied by the power supply and applies the electric power to the inductive load. The circuit board has a signal ground connected to the controller and a power ground connected to the detection resistor group of the driving circuit. The temperature measuring element is connected to the power ground.

Abstract: Aspects of direct current (DC)-DC converters with an integrated matrix transformer and multiphase current doubler rectifiers are described. In some examples, a DC-DC converter can include a matrix transformer that has multiple magnetically integrated transformer components that are magnetically integrated using transformer components that share a top plate and a bottom plate. A multiphase current doubler rectifier can include multiple synchronous rectifiers corresponding to the plurality of transformer components of the matrix transformer.

Abstract: A control circuit used in a switch mode power supply is provided. The control circuit has an error amplifier, a first compensation network having a first resistance and a second compensation network having a second resistance. The error amplifier has a first input terminal, a second input terminal and an output terminal. The first compensation network is coupled between the first input terminal and the output terminal of the error amplifier. The second compensation network is coupled to the first input terminal of the error amplifier. When the switch mode power supply enters the transient state, the control circuit increases the first resistance of the first compensation network or decreases the second resistance of the second compensation network.

Abstract: An electronic device has a power rail that is driven by voltage regulators and provides a rail voltage. Each voltage regulator has an output interface electrically coupled to the power rail to deliver up to a predefined regulator current to the power rail. In each voltage regulator, a voltage regulator controller has an input coupled to the output interface by a feedback path and controls a drive path coupled to the output interface. A bypass unit is coupled to the drive path and voltage regulator controller and operates in a standby mode or an operational mode. In the standby mode, the bypass unit bypasses the feedback path and the respective voltage regulator does not deliver current to the power rail, while in the operational mode, the bypass unit does not bypass the feedback path and the respective voltage regulator delivers up to the predefined regulator current to the power rail.

Abstract: To prevent deterioration of current detection accuracy due to a difference in deterioration between a main MOS and a sense MOS. The load drive device includes a main MOS (101) for supplying a load current to a load, a sense MOS (102) to be used for detection of the load current, and an equalizer circuit (110) and a switch (120) which are provided in parallel between the source terminal of the main MOS and the source terminal of the sense MOS. The drain terminal of the main MOS and the drain terminal of the sense MOS have a common connection, and when a current is detected, the terminal voltage of the main MOS and the terminal voltage of the sense MOS are equalized by the equalizer circuit, and the switch is opened. When a current is not detected, the equalizer circuit is stopped and the switch short-circuits the source terminal of the main MOS and the source terminal of the sense MOS.

Abstract: A power supply device includes a power supply circuit configured to output different voltages to a plurality of output lines, a plurality of capacitors provided in correspondence with the plurality of output lines, one end of each of the plurality of capacitors being coupled to a corresponding output line of the plurality of output lines and an other end thereof being coupled to a ground potential, a plurality of diodes provided in correspondence with the plurality of output lines, anodes of the plurality of diodes being coupled to the corresponding output lines and cathodes thereof being commonly coupled, and a discharge resistor coupled to the cathodes of the plurality of diodes.