Abstract: A transient boost controller for controlling a transient boost circuit of a voltage regulator includes a feedback circuit and a processing circuit. The feedback circuit obtains a first feedback signal and a second feedback signal sensed from an output capacitor of the voltage regulator, wherein the first feedback signal is derived from a voltage signal at a first plate of the output capacitor, and the second feedback signal is derived from a voltage signal at a second plate of the output capacitor. The processing circuit generates a detection result according to the first feedback signal and the second feedback signal, and outputs the detection result for controlling the transient boost circuit of the voltage regulator.

Abstract: An adaptive direct current (DC) conversion system may include a multi-mode DC converter circuit including two or more power switches, where the multi-mode DC converter circuit is operable in two or more pulse width modulation (PWM) modes based on two or more PWM signal sets provided to the two or more power switches. The system may further include a PWM controller, where the PWM controller controls which of the two or more PWM modes the multi-mode DC converter circuit operates in by providing the multi-mode DC converter circuit with the associated one of the two or more PWM signal sets.

Abstract: Both AC and DC Power supply systems that may be connected directly to. AC mains and are integrated on silicon are described. The AC systems include both simple on/off capabilities as well as phase control capabilities. The DC power supply may be fixed, adjustable as through a potentiometer and programmable. The power supply systems use newly invented components of AC/DC converters and bidirectional MOSFET switches.

Abstract: A pulse receiving circuit constituting a signal transmission device includes a first pulse detector that receives a differential input between a first reception pulse signal, i.e. an internal signal at a secondary winding of a first transformer and a second reception pulse signal, i.e. an internal signal at a secondary winding of a second transformer; a second pulse detector that receives the differential input between the first reception pulse signal and the second reception pulse signal with input polarity reversed to that of the first pulse detector; and a logic unit that generates a reception pulse signal based on output signals of the first and second pulse detectors, respectively.

Abstract: A charging device and a safety function control circuit and method thereof are provided. When a charging device is not connected to a load, a converted voltage value of a power connection terminal of the charging device is kept to be lower than a safe voltage value so as to maintain a safe mode. The safety function control circuit includes a first control module and a second control module for constant voltage control. The first control module and the second control module perform matching control on a power conversion circuit of the charging device, and in case of a single fault of one of the control modules, the other module is still capable of keeping the converted voltage value to be less than the safe voltage value. Thus, it is ensured that the safe mode stays functional in case of a concurrency of both a single hardware fault and a single firmware fault.

Abstract: Described are computer implemented methods, a system and a power supply amplifier (PSA) that supports compliance testing of the PSA. The power supplies power to a powered device/information handling system. A voltage of synchronous rectifier (SR) gate is measured and compared to a calculated sense voltage at a sense resistor of the PSA. If the sense voltage is zero, received current of the PSA bypasses a first blocking MOSFET and a second blocking MOSFET for over voltage protection. If the sense voltage is not zero, the received current passes through the first blocking MOSFET.

Abstract: A power supply circuit includes a transformer having a primary winding and secondary windings, a first power conversion circuit configured to convert a DC voltage into an AC voltage and output the AC voltage to the primary winding, a rectifying and smoothing circuit that is connected to the secondary winding and is configured to rectify and smooth an alternating current output from the secondary winding, and a second power conversion circuit configured to boost a direct current output from the rectifying and smoothing circuit and supply to a load a DC voltage lower than a rated voltage of the load set in advance.

Abstract: There is provided an electrical power system comprising: a DC voltage source, a DC electrical network, a DC to AC to DC converter having a primary side connected to the DC voltage source and a secondary side connected to the DC electrical network, and a controller configured to control the DC to AC to DC converter, wherein the controller is configured to: monitor an electrical current or voltage between the DC voltage source and the DC electrical network; determine, based on the monitored electrical current or voltage, whether the DC electrical network is in a fault condition; and increase a switching frequency of the primary side of the DC to AC to DC converter in response to a positive determination that the DC electrical network is in a fault condition.

Abstract: An apparatus includes a DC-to-AC converter comprising a first output terminal and a second output terminal. The apparatus also includes a DC-to-DC converter comprising a third output. The DC-to-AC converter is configured to receive a DC input voltage from a DC power source, and to produce a first alternating output voltage at the first output terminal, and a second alternating output voltage at the second output terminal. The DC-to-DC converter is configured receive a DC input voltage from the DC power source, and to step down the DC input voltage at the third output.

Abstract: An asymmetric power converter includes a primary-side rectifying/filtering circuit, a power factor correction circuit, an asymmetric conversion circuit, and a feedback control circuit. The primary-side rectifying/filtering circuit rectifies and filters an input voltage to output a first voltage. The power factor correction circuit converts the first voltage into a power voltage. The asymmetric conversion circuit converts the power voltage into an output voltage to supply power to a load, and an output current is drawn by the load. The feedback control circuit generates a feedback control signal according to a load power demand provided by the load. The feedback control circuit controls the asymmetric conversion circuit to operate in a full-bridge resonant mode, a half-bridge resonant mode, or a hybrid half-bridge resonant mode according to the feedback control signal.

Abstract: An active clamp flyback circuit includes: a clamp capacitor that is connected to a primary-side winding of a transformer and that is configured to absorb leakage inductance energy of the primary-side winding; an auxiliary switching transistor that is configured to control the clamp capacitor to perform reverse excitation power charging on the primary-side winding by using the auxiliary switching transistor; a first diode, where the first diode is connected in series between the clamp capacitor and the auxiliary switching transistor; and a second diode, where the second diode is connected between the first diode and the clamp capacitor, and the second diode is connected in series between the clamp capacitor and a primary-side auxiliary winding.

Abstract: A physical arrangement of at least two power switches and at least one capacitor in a power loop. At least one of the switches is formed of at least two parallel electronic devices, such as transistors. The arrangement minimizes total power loop impedance and results in approximately equal impedance in each parallel branch of the switch formed of two parallel devices, thereby resulting in approximately equal currents in the switches.

Abstract: A voltage balancing circuit for a double-boost DC/DC converter includes a split DC-link having a first midpoint, outer directional devices and inner switches parallel-connected to the DC-link, wherein the outer directional devices are connected to capacitors of the split DC-link and to the inner switches. The inner switches are connected to each other at a second midpoint. A DC source terminal, to which a DC source is connectable in parallel over inductances to the inner switches, is included. An inductance is connected to the midpoint of the DC link and to the midpoint of the inner switches.

Abstract: A variable current gate driver for a transistor includes a first current control device having a first controllable output current. The first current control device is electrically connected between a first bus and an activator of the transistor, and a second current control device having a second controllable output current. The second current control device is electrically connected between the activator of the transistor and a second bus. A controller is operatively connected to the first and second current control devices to control the first and second controllable output currents to control the first and second current control devices to control activation of the transistor via the activator. The controller is operative to control the first and second current control devices to control a slew rate of the transistor.

Abstract: A DC-DC converter circuit includes an error amplifier, a comparator, an oscillator, and a control circuit. The error amplifier is configured to generate an error signal. The control circuit is coupled to the error amplifier, the comparator, and the oscillator. The control circuit is configured to generate an oscillator control signal to control a frequency of the oscillator based on the error signal, and to generate a peak control signal provided to the comparator based on the error signal. The control circuit is also configured to switch, based on the error signal, between a first modulation mode and a second modulation mode during a transition mode, and in the transition mode, generate the oscillator control signal based on the peak control signal and the error signal.

Abstract: 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.

Abstract: A voltage converter includes an input voltage line; an inductor coupled to the input voltage line; transistors coupled to the inductor; an output voltage line coupled to at least one of the transistors; a current sensor coupled to at least one of the input voltage line, the inductor, or the output voltage line; and a comparator coupled between the current sensor and the transistors. A DC-DC converter may include a voltage converter having an inductor and a plurality of transistors and configured to convert an input voltage into a power voltage and output the power voltage to an output terminal, an input current sensor configured to sense the input current of the converter, and a controller configured to change the slew rate of an inductor voltage in response to the input current of the converter and a preset reference current.

Abstract: A conversion circuit includes a voltage supply circuit, a storage circuit, and a gate terminal. The storage circuit includes a first terminal and a source terminal. The voltage supply circuit is configured to provide a bias voltage according to a power supply voltage. The first terminal is configured to receive a low voltage. The source terminal is configured to output a source voltage according to a storage voltage and the low voltage, wherein the storage circuit is configured to storage the storage voltage according to the bias voltage and the low voltage. The gate terminal is configured to output a gate voltage, wherein during a first period, the gate terminal is coupled to the first terminal, and the gate-source voltage can form a negative voltage.

Abstract: A PFC power converter includes a power switch and an inductive device. A compensation signal is provided in response to an output voltage of the PFC power converter. An adapted compensation signal is provided in response to an ON time of the power switch and the compensation signal, to make the adapted compensation signal, the ON time, and the adapted compensation signal fit a predetermined correlation. The ON time of the power switch is determined in response to the adapted compensation signal. The PFC power converter is capable of achieving high PF when operating in discontinuous conduction mode.

Abstract: A bridgeless PFC circuit includes: a control module that collects a current flowing through a current sampling element; and when the current flowing through the current sampling element is greater than a first threshold, the control module controls a switch element to be turned on. Based on the current flowing through the current sampling element, the switch element can be controlled to be turned on, thereby implementing zero-voltage turn-on of the switch element. Because the collected current does not change abruptly, a delay requirement on a sampling control circuit included in the control module is lowered, and a signal anti-interference capability of the control module is strong.