Abstract: A power converter includes a power stage circuit, a ramp generator circuit, and a control circuit. The power stage circuit generates an output signal according to an input signal and a control signal. The ramp generator circuit generates a ramp signal according to the control signal, the input signal, and the output signal. The control circuit generates the control signal according to the output signal, a reference signal, and the ramp signal.

Abstract: A power converter which has a reservoir capacitor, a first flying capacitor, and first and second inductors coupled to a network of switches is presented. A driver is adapted to drive the network of switches with a sequence of states during a drive period. The power converter is operable in a first mode to deliver an output current using both the first and second inductors and a second mode to deliver the output current using the first inductor and without using the second inductor. When a load current is above a threshold value, the driver drives the network of switches in a first sequence of states to operate the power converter in the first mode. When the load current is equal or below the threshold value, the driver drives the network of switches in a second sequence of states to operate the power converter in the second mode.

Abstract: A device includes a voltage regulator circuit configured to pull up a voltage at an output terminal to equal to half of a supply voltage; multiple first transistors coupled between the output terminal and a voltage terminal providing the supply voltage; and a control circuit configured to pull down gate voltages of the first transistors from the supply voltage to a voltage level between the supply voltage and a ground voltage at a first time. The first transistors are configured to pull up the voltage at the output terminal to the supply voltage at a second time.

Abstract: Multiphase voltage regulator systems are disclosed which include parallel signal pathways that functionally cooperate to provide an analog output signal at a constant, or substantially constant, voltage. The parallel signal pathways generate energy storage element charging signals to charge and/or discharge energy storage elements. Energy provided by discharging energy storage elements is thereafter combined to provide the analog output signal. Moreover, the parallel signal pathways compare one of the energy storage element charging signals with a reference input signal to provide a global error correction signal representing a difference, or error, between the reference input signal and the analog output signal. The parallel signal pathways thereafter adjust the energy storage element charging signals in accordance with the global error correction signal to lessen this difference or error.

Abstract: A power converter with a voltage-modulating circuit, a controller, and a sensing circuit. The controller controls switches of a voltage-modulating circuit to provide a level of an output voltage (VOUT) based on an operational mode of the voltage-modulating circuit and a voltage measurement provided by the sensing circuit. The operational mode of the voltage-modulating circuit can be pass-through mode or voltage-modulating. The sensing circuit includes one or more externally programmable connectors configured to determine one or more boundaries of an output voltage window. In the pass-through mode, a level of VOUT will be provided without switching any of the switches when a level of an input voltage (VIN) falls within the output voltage window. In the voltage-modulating mode, a level of VOUT will be provided by switching one or more of the switches when the level of VIN falls outside of the output voltage window having only one boundary.

Abstract: A voltage converter includes a capacitive voltage conversion circuit to receive an input voltage, convert the input voltage into an output voltage, and output the output voltage. The voltage converter also includes an output capacitor, an inductor coupled in series between the capacitive voltage conversion circuit and the output capacitor, a voltage detector, and a controller. The capacitive voltage conversion circuit includes switches, at least one flying capacitor, and an intermediate capacitor at an output portion of the capacitive voltage conversion circuit. The voltage detector detects a voltage at a node that is a connection point of the intermediate capacitor and the inductor. The controller controls the switches to change between at least two states by comparing the result of voltage detection to a threshold.

Abstract: A device is configured to detect a zero voltage switching (ZVS) circuit output that includes a hard switching signal. The hard switching signal includes a false signal and a spike signal. Thereafter, the device generates digital pulse signals that correspond to the false signal and the spike signal. Accordingly, the device filters the generated digital pulse signal that corresponds to the false signal, and uses the digital pulse signal that corresponds to the spike signal for adjusting a timing of a pulse width modulation (PWM) switching cycle.

Abstract: A voltage conversion circuit and a non-isolated power supply system are provided. The voltage conversion circuit includes: a switching power supply chip which includes a power MOS transistor and a driving circuit, where the driving circuit is adapted to drive the power MOS transistor; and a driving circuit power supply unit which includes a boost unit, wherein when an output voltage of the boost unit is less than a working voltage of the driving circuit, an internal power supply of the switching power supply chip provides the working voltage for the driving circuit; and when the output voltage of the boost unit reaches the working voltage of the driving circuit, the output voltage of the boost unit provides the working voltage for the driving circuit.

Abstract: The present disclose relates to an intermittent power saving mode control circuit and method thereof, comprising: a mode indication signal generating circuit configured to generate a mode indication signal according to an output voltage compensation signal, a first reference voltage, and a second reference voltage, the mode indication signal is configured to indicate that a switching power supply is working in a work mode or a sleep mode; wherein the second reference voltage is adjusted according to a frequency of the mode indication signal, so that the frequency of the mode indication signal is maintained within a predetermined range.

Abstract: A method for protecting a circuit includes steps of: providing a first current source connected to a capacitor of the circuit through a second switch; providing a detection and control unit for turning on the second switch at a first time, and let the first current source to charge the capacitor; detecting a voltage value of the capacitor by the detection and control unit; wherein when the voltage value is greater than or equal to a reference voltage value, the detection and control unit turns off the second switch and turns on a first switch of the circuit, and when the voltage value is lower than the reference voltage value, the detection and control unit turns off the second switch and continue turns off the first switch.

Abstract: A power conversion unit includes a plurality of semiconductor modules, a gate drive circuit, a first substrate having a flat plate shape, and a second substrate having a flat plate shape. The first substrate has a first surface facing a bottom plate of a casing accommodating the semiconductor modules and the gate drive circuit, and a second surface on an opposite side to the first surface. The second substrate is arranged above the first substrate in parallel with the second surface. The semiconductor modules are mounted on the first surface. The gate drive circuit is formed on a surface of the second substrate on a side that does not face the second surface. The power conversion unit further includes a connector provided on the second surface and connected to a surface on a side facing the second substrate.

Abstract: A circuit portion comprises a DCDC converter that is configured to charge and discharge an inductor according to a duty cycle to provide current to an output load. A duty module is configured to determine the duty cycle such that the DCDC converter will output a target current. A duty limiter module is configured to cause the inductor to discharge early if the determined duty cycle exceeds a threshold.

Abstract: A switching module includes a determiner to open a first bidirectional switch and close a second bidirectional switch from a first time point over a testing period to determine that the first bidirectional switch has a short circuit failure when a differential absolute value of voltage values detected by voltmeters is equal to a preset voltage threshold value or less, and to open the first bidirectional switch and close the second bidirectional switch from a second time point after a period of n+½ times, where n is a positive integer, the set cycle from the first time point elapses, over a testing period to determine that the first bidirectional switch has a short circuit failure when a differential absolute value of the voltage values detected by the voltmeters is equal to the voltage threshold value or less.

Abstract: A DC-DC converter including a switching buck regulator including a first power switch connected to a first power node, a second power switch connected to a second power node, a driver configured to drive the first and second power switches, an output filtering inductor connected to a node between the first and second power switches, and an output filtering capacitor connected to the output filtering inductor, a controller configured to compensate for an output signal of the switching buck regulator in a time domain using a reference voltage, and a feed forward circuit connected between the switching buck regulator and the controller, and including a first buffer, a second buffer, an RC filter, and an adder may be provided. Accordingly, the DC-DC converter can reduce a delay of a compensation circuit, improve transient response characteristics of the switching buck regulator, and further improve the performance of the DC-DC converter.

Abstract: A method includes detecting a first current flowing through a first clamping device coupled to a gate of a power switch, determining whether an inductor current reduces to zero based upon a first comparison between the first current and a first predetermined current level, and after determining the inductor current reduces to zero, determining whether a drain voltage of the power switch enters a valley of a resonant ringing based upon a second comparison between the first current and the first predetermined current level.

Abstract: A controller for a switching regulator receiving an input voltage and generating a regulated output voltage includes a buck control circuit and a boost control circuit. The controller activates the buck control circuit to generate the regulated output voltage having a first voltage value less than the input voltage. The controller activates the boost control circuit to return charges stored on the output capacitor at the output node to the input node, thereby driving the regulated output voltage to a second voltage value lower than the first voltage value. In some embodiments, in response to a command instructing the controller to allow the output voltage to decay, the controller operates in the boost mode using the boost control circuit to recycle the stored charge at the output node while ramping down the output voltage.

Abstract: A power supply circuit has a push-pull portion having a transformer; first and second terminals of the primary winding, each connected to ground via first and second switches; an inductor connected between an input voltage and the primary winding centre tap via a third switch; an energy storage portion connected between the primary winding and ground, and to the inductor via a fourth switch; a controller arranged to monitor the input voltage and to apply partially overlapping first and second PWM signals to the first and second switches; when input voltage is between first and second thresholds, the controller closes the third switch and opens the fourth switch; above the second threshold, the controller applies a third PWM signal to the third switch and opens the fourth switch; and below the first threshold, the controller closes the third switch and applies a fourth PWM signal to the fourth switch.

Abstract: A system and method of fault detection based on a detailed waveform analysis is presented for transient and steady-state fault operation of 3-? DAB converter. Main symptoms of the converter during normal and fault conditions have been identified and a unique pattern in DC bias of phase currents under fault mode is noted. The logic-based fault diagnosis scheme is used to detect the fault and identify the faulty transistor.

Abstract: According to an aspect, a non-regulated power converter includes a plurality of switching tank converter (STC) modules configured to be connected in parallel and to a load. The plurality of STC modules includes a first STC module configured to generate a first output current and a second STC module configured to generate a second output current. The first STC module includes an output current (OC) measuring circuit configured to measure a value of the first output current, and a dead time (DT) adjustor configured to compare the value of the first output current with a value of a minimum output current provided by the plurality of STC modules. The DT adjustor is configured to adjust a dead time in response to the value of the first output current being greater than the value of the minimum output current.

Abstract: Circuits and methods encompassing a power converter that can be started and operated in a reversed unidirectional manner or in a bidirectional manner while providing sufficient voltage for an associated auxiliary circuit and start-up without added external circuitry for a voltage booster and/or a pre-charge circuit—that is, with zero external components or a reduced number of external components. Embodiments include an auxiliary circuit configured to selectively couple the greater of a first or a second voltage from a power converter to provide power to the auxiliary circuit. Embodiments include an auxiliary circuit configured to select a subcircuit coupled to the greater of a first or a second voltage from a power converter to provide an output for the auxiliary circuit. Embodiments include a charge pump including a gate driver configured to be selectively coupled to one of a first voltage node or second voltage node of the charge pump.