Abstract: These teachings apply with respect to a direct current (DC)-output converter and provide for adjusting a number of switching pulses per burst cycle as a function, at least in part, of converter output loading. This adjustment can be made by controlling burst frequency with respect to at least one predetermined threshold frequency. The predetermined threshold frequency can comprise a non-audible frequency such that the number of switching pulses is adjusted to prevent the burst frequency from itself constituting an audible signal. The adjustment of the number of switching pulses per burst cycle may only occur when the output loading is less than a predetermined level of loading. These teachings may also provide for clamping the pulse frequency for the pulses in each burst package to a particular value when dynamically controlling the number of pulses in each burst package. The aforementioned particular value may constitute, for example, a highest available switching frequency.

Abstract: A switching power converter provides regulated voltage to a load. The switching power converter comprises a transformer including a primary winding coupled to an input voltage and a secondary winding coupled to an output of the switching power converter. The switching power converter further comprises a power switch coupled to the primary winding and a rectifier coupled to the secondary winding. Current is generated in the primary winding responsive to the power switch being turned on and not generated responsive to the power switch being turned off. A detection circuit measures a voltage across the rectifier. If the detection circuit detects a decrease in the voltage across the rectifier outside of a blanking period, the detection circuit generates a current pulse in the secondary winding of the transformer.

Abstract: A charge pump includes: a first diode that is connected to a first node; a second diode that is connected to a second node; a pump capacitor that is connected to a third node to which the first diode and the second diode are connected; a power supply capacitor that is connected to the pump capacitor; a third diode that is connected between the pump capacitor and the power supply capacitor; and a zener diode that is connected in parallel to the third diode and the power supply capacitor. A power supply device decreases a ripple of an output current using a ripple reduction signal.

Abstract: Systems and methods for driving a low quiescent current DCDC converter are disclosed. An error threshold compensation circuit of the DCDC converter is configured to detect an output voltage of the DCDC converter, compare the output voltage to a target voltage, and modify a first threshold voltage of the hysteresis control circuit based on the comparison.

Abstract: A power converter for converting an input power at an input of the converter to an output power at an output of the converter includes a power conversion circuit and a snubber circuit coupled to the power conversion circuit. The power conversion circuit includes a switching device coupled to a reference potential, and an inductance coupled to the switching device. The snubber circuit includes a snubber switching device, a capacitance coupled to the snubber switching device, and an auxiliary inductance coupled to the inductance of the power conversion circuit and the snubber switching device. The snubber switching device and the capacitance are coupled across the switching device of the power conversion circuit. The capacitance is adapted to store leakage energy output from the power conversion circuit and discharge at least a portion of the stored leakage energy via the snubber switching device. Other example power converters are also disclosed.

Abstract: A switching circuit with reverse current prevention for use in a Buck converter includes a power switch coupled to a coupling node, which is an interconnection point of a power switch, an inductor and a freewheeling diode of the Buck converter. The inductor is coupled between the coupling node and an output of the Buck converter, and the freewheeling diode is coupled between coupling node and an output return of the Buck converter. A controller is coupled to receive a feedback signal to control switching of the power switch to regulate a transfer of energy from the input to the output of the Buck converter. A reverse current prevention circuit is coupled to detect a reverse current condition of the power switch to generate an inhibit signal to inhibit the power switch from receiving a drive signal to prevent a reverse current through the power switch.

Abstract: A boost chopper circuit is described that an alternating current (AC) power source; at least one inductor connected to said AC power source; a rectifier connected to said inductor and AC power source; at least one switch shorting our said rectifier; a series circuit connected in parallel with said switch of at least one diode and a capacitor; and a load connected in parallel with said capacitor. A control technique is employed that includes turning on and off the switch in order to keep the average current per pulse cycle proportional to the AC input voltage during the same pulse cycle.

Abstract: A system includes a boost converter configured to amplify input voltage received from one or more power sources into output voltage. The system also includes a current sensor configured to sense a current of the input voltage for example, by induction. The system further includes a controller configured to adjust an amplification of the boost converter in response to the current sensed by the current sensor. When utilized in each of a plurality of power source modules coupled to a common load, the power source modules adjust the amplifications of their boost converters towards equalization of their output voltages and their currents in response to sensed currents of the input voltages changing through demand of the common load. Associated systems and methods are also disclosed.

Abstract: A voltage converter performs a step-up operation and step-down operation in parallel. The step-up operation raises an input voltage to a voltage that is N (N?1) times the input voltage. The step-down operation lowers the input voltage to a voltage that is M (0?M?1) times the input voltage. The voltage converter outputs the voltage transformed through the step-up operation and the step-down operation from output terminals. A current detection circuit detects an output current. A step-up adjustment circuit decreases N if the output current is higher than a reference current, and increases N if the output current is lower than the reference current. A step-down adjustment circuit decreases M if the output current is higher than a reference current, and increases M if the output current is lower than the reference current. The reference current is higher than the reference current.

Abstract: Certain aspects of the present disclosure provide an amplifier for signal amplification. Certain aspects further describe methods and apparatus for applying overload protection for such amplifier. For example, one method generally includes detecting an overload condition of an amplifier based on a signal at a node of the amplifier, and controlling a parameter of an input signal of the amplifier such that the parameter of the input signal is maintained below a threshold based on the detection of the overload condition. The parameter of the input signal may include, for example, a voltage level or a duty cycle of the input signal.

Abstract: A device and method for generating pulses to activate and deactivate a kicker magnet is provided. When the kicker magnet is deactivated the circuit generates and stores a magnetic field in an inductor. When the kicker magnet is activated, the circuit changes configuration so that the magnetic field and current stored in the inductor can provide the necessary current to activate the kicker magnet is a minimal amount of time. The configuration of the circuit changes via the use of switches. The switches can employ Zener diodes arranged so as to provide protection against high voltage events and rogue neutrinos that may bombard the switches when the kicker magnet is used in the context of deflecting a particle beam.

Abstract: A DC-DC converter includes an input terminal, multiple output terminals, an inductor, a first switch, a first condenser, a second switch and a switch controller. One end of the inductor is connected to the input terminal. The first switch is subjected to on-off control to change a current flowing through the inductor. The first condenser has one end connected between the inductor and a first output terminal, which is one of the multiple output terminals, and has the other end connected to a ground. The second switch is connected between the inductor and the first condenser. The switch controller controls the second switch to turn on when the first switch is turned off while a first output voltage from the first output terminal is smaller than a predetermined first threshold value.

Abstract: A system includes a multi-conductor bus, a master device coupled to the multi-conductor bus, and at least one slave device coupled to the multi-conductor bus. The multi-conductor bus has a clock line and a data line. The master device is arranged to transmit an address configuration sequence, and the at least one slave device is arranged to configurably determine its own address based on at least one portion of the address configuration sequence. The at least one slave device has a physical address configuration input coupled to either a fixed voltage potential or a changing voltage potential. The at least one slave device is arranged with a first address during a pre-initialization state and arranged with a second address during a post-initialization state.

Abstract: A start-up circuit to discharge EMI filter is developed for power saving. It includes a detection circuit detecting a power source for generating a sample signal. A sample circuit is coupled to the detection circuit for generating a reset signal in response to the sample signal. The reset signal is utilized for discharging a stored voltage of the EMI filter.

Abstract: For transformerless switching regulators, a current-mode controlled boost converter operates based on current sensing through a switch to ground, allowing use of common controllers. To avoid reverse current from a cascaded charge pump, the input of the charge pump is blocked by a diode from passing through the switch to ground and is itself separately switched to ground.

Abstract: A method and a system are provided for controlling waste heat generated by a motor vehicle having an electric drive including a rechargeable battery and an electric machine for driving the motor vehicle. The method includes determining the thermal load on at least two components of the electric drive; if a first electric component of the electric drive has a lower thermal load than a second electric component, actuating the electric drive such that the generation of waste heat in the first electric component increases and the generation of waste heat in the second electric component does not increase; and if the second electric component has a lower thermal load than the first electric component, actuating the electric drive such that the generation of waste heat in the second electric component increases and the generation of waste heat in the first electric component does not increase.

Abstract: A switched-mode power regulator circuit has four solid-state switches connected in series and a capacitor and an inductor that regulate power delivered to a load. The solid-state switches are operated such that a voltage at the load is regulated by repetitively (1) charging the capacitor causing an increase in current flow in the inductor followed by a decrease in current flow in the inductor and before the current flow in the inductor stops, (2) discharging the capacitor causing an increase in current flow in the inductor followed by a decrease in current flow in the inductor and before the current flow in the inductor stops, repeating (1).

Abstract: Aspects of the disclosure provide a power circuit that includes a first switch circuit in parallel with a second switch circuit. The first switch circuit and the second switch circuit are coupled to a first control node, a second control node, a first power node and a second power node via interconnections. The power circuit receives a control signal between the first control node and the second control node to control a current flowing from the first power node to the second power node through the first switch circuit and the second switch circuit. At least one of a first source terminal of the first switch circuit and a second source terminal of the second switch circuit is coupled to the second control node with a resistive element having a specific resistance.

Abstract: The present application discloses a direct current (DC) converter including a voltage divider for dividing a voltage provided by a DC voltage source, having a positive DC voltage input terminal, a negative DC voltage input terminal, and a divided voltage output terminal; a conversion circuit having a first switch, a second switch, an inductor unit, a first unidirectional conductor, and a second unidirectional conductor; a positive converted voltage output terminal; and a negative converted voltage output terminal.

Abstract: A LED lighting system, such as a dimmable LED lamp, that may simulate the performance of an incandescent bulb. LED strings of different colors may be connected to the output of a single LED driver that regulates an overall intensity of light produced by the LED lighting system. The color of the LED lighting system may be controlled by circuitry, such as one or more switches, that allocates current between the LED strings to change the color temperature of light emitted by the LED lighting system as the light intensity changes.

Abstract: A control circuit for a voltage regulator includes a digital compensator having adaptive compensation to permit operation over different operating conditions. The digital compensator includes a gain parameter that is inversely proportional to the input voltage and is independent of the switching frequency. In embodiments, the voltage regulator has a crossover frequency established by at least one pole and at least one zero and the corner frequency of the converter output filter has a first fixed, predetermined relationship with respect to the switching frequency, a second fixed, predetermined relationship with respect to the crossover frequency, and a third fixed, predetermined relationship with respect to the at least one pole and at least one zero.

Abstract: A power supply apparatus includes a resonant circuit that determines a resonant frequency, a drive unit that drives the resonant circuit, and a controller that causes the resonant frequency to change between a first resonant frequency and a second resonant frequency. The first resonant frequency is higher than a frequency of a drive signal of the drive unit and the second resonant frequency is lower than the frequency of the drive signal.

Abstract: The control circuit for a DC-DC converter includes a differential amplifier and an oscillator, and also a multiplier and a voltage divider circuit. The multiplier has a first input terminal receiving a feedback voltage derived from an output voltage of the DC-DC converter through the voltage divider circuit, a second input terminal receiving a parameter compensation value, and an output terminal connected to a first input terminal of the differential amplifier. A second input terminal of the differential amplifier receives a reference voltage. The differential amplifier provides a differential signal to the oscillator. The oscillator is connected to a switch driver module of the DC-DC converter so as to provide an output signal whose frequency is proportional to the differential signal. The control circuit is able to effectively reduce response time, achieve fast transient transition, and significant enhance system reliability.

Abstract: The present invention discloses a system and method for active power factor correction and current regulation in led circuit. The system (100) used in the LED driver circuit performs active PFC and current regulation through the dynamic input current wave shaping by limiting peak currents. The dynamic wave 5 shaping scheme is realized through hardware and firmware and is used to strike an optimal balance between current accuracy, Power factor, THD and peak inductor currents. The system (100) is versatile enough to improve PF and current accuracy in LED circuits and indimmers circuits.

Abstract: A method comprises generating a first ramp signal and a second ramp signal for controlling a buck converter portion and a boost converter portion of a buck-boost converter respectively, comparing the first ramp signal and the second ramp signal to a control signal, controlling the buck converter portion using the comparing the first ramp signal to the control signal and the boost converter portion using the comparing the second ramp signal to the control signal, comparing a current flowing through the inductor to a current threshold and terminating a switching cycle based upon the comparing the current flowing through the inductor to the current threshold.

Abstract: A system includes a single wire communications bus, a first slave device, and a second slave device. The first slave device and the second slave device each include a plurality of pins. The first slave device and the second slave device are uniquely identified on the single wire communications bus based on which one of the plurality of pins is coupled to the single wire communications bus.

Abstract: Apparatus and techniques described herein can include a load circuit comprising a direct current (DC) input terminal, and a source circuit comprising a direct current (DC) output terminal coupled to the DC input terminal of the load circuit. The source circuit can include a source control circuit configured to provide a current-limited DC output voltage and monitor the current-limited DC output voltage to detect an authentication signal provided at the DC output terminal by the load circuit, the load circuit configured to modulate the voltage at the DC output terminal using a pull-down circuit. The load circuit can be configured to compare the supply voltage at the DC input terminal to a reference voltage and, in response, energize other portions of the load circuit when the input current provided the DC input terminal is sufficient as indicated at least in part by the comparison.

Abstract: An apparatus for generating injection current for a fuel cell stack includes a switch configured to retain any one state of an on state and an off state; an inductor configured to output accumulated energy according to a state of the switch; and a converter configured to provide an output of the inductor to a load or convert the output into a predetermined voltage and provide the predetermined voltage to a load.

Abstract: A multiphase power converter and a corresponding method is presented. The multiphase power converter contains a first and a second constituent switched-mode power converter. The first constituent switched-mode power converter provides, both in a first mode of operation and in a second mode of operation, a first phase current to an output of the converter. The second constituent switched-mode power converter provides, in the second mode, a second phase current to the output of the converter. The converter switches, depending on an operation condition of the converter, between the first mode and the second mode. A first transconductance of the first constituent switched-mode power converter is adapted when switching between the first mode and the second mode. By adapting the first transconductance, unsteadiness of the output voltage of the converter occurring during the switching between both modes of operation is minimized.

Abstract: An auto-calibrated current sensing comparator is provided. A secondary dynamic comparator shares the same inputs and acts to adjust a calibration control of the current sensing comparator. The calibration control may be in the form of adjusting the offset of the current sensing comparator or adjusting a propagation delay that is added to its output.

Abstract: In accordance with an embodiment, a method, includes operating a power converter that comprises an electronic switch connected in series with an inductor in one of a first operation mode and a second operation mode. Operating the power converter in each of the first operation mode and the second operation mode includes driving the electronic switch in a plurality of successive drive cycles based on drive parameter. Each of the plurality of drive cycles includes an on-time in which the electronic switch is switched on and an off-time in which the electronic switch is switched off.

Abstract: The application discloses the control of switches, such as metal-oxide semiconductor field effect transistors (MOSFETs) devices, during surge events. The switch controllers and methods for operation thereof discuss methods for providing driving signals to the switch for adjusting the mode of operation based on the voltage and/or current thresholds as sensed by the system and/or by the switch controller.

Abstract: A power supply apparatus of a vehicle includes: auxiliary machines electrically connected between a battery and a converter; and a control device controlling inverters and the like based on a required vehicle power including a required charge discharge amount of the battery. The control device has a continuous voltage step-up mode and an intermittent voltage step-up mode. In the continuous voltage step-up mode, the control device calculates the required charge discharge amount based on electric power supplied from the battery. In the intermittent voltage step-up mode, the control device changes a method of calculating the required charge discharge amount to a method that calculates the required charge discharge amount based on electric power passing through the converter, and makes the required charge discharge amount smaller than the required charge discharge amount in the continuous voltage step-up mode.

Abstract: This disclosure relates to a DC-DC conversion control module, a DC-DC converter, and a display device. The DC-DC conversion control module includes a voltage input terminal, a control voltage output terminal, and a control sub-module; the control sub-module includes a delay unit, a switch unit, and an output control unit; the delay unit is configured to output a trigger signal after delaying for a time length; the switch unit is configured to, when receiving the trigger signal, make the path between the voltage input terminal and the input terminal of the output control unit be conducted; and the output control unit is configured to output a control voltage. Embodiments of the disclosure can realize adjustable delaying with respect to the output voltage of the DC-DC converter.

Abstract: There is disclosed a voltage regulator, including a switching stage, for generating an output voltage, the voltage regulator comprising a feedback path for controlling the switching stage, in which a feedback signal in the feedback path is ramp-compensated, the ramp for the ramp compensation being generated from an output of the switching stage.

Abstract: A booster for PHOTOVOLTAIC (PV) panel output power utilizes the low output voltage generated by the PV panel during none optimum operating conditions, to enhance the power output level of PV panel. The booster module described, in the exemplary embodiments of the present invention, operates only on energy provided by the PV panel that is connected to, and does not require any other source of energy. Booster operation is implemented such that, when booster is disabled, during normal PV panel output levels (50% to 100% of a PV panel rating), it does not adversely affect the PV panel efficiency.

Abstract: A system includes a single wire communications bus, a first slave device, and a second slave device. The first slave device and the second slave device each include a plurality of pins. The first slave device and the second slave device are uniquely identified on the single wire communications bus based on which one of the plurality of pins is coupled to the single wire communications bus.

Abstract: A power converter includes a buck converter with a low-side switch. During a discharge mode, current passes through the low-side switch to form a current loop. The low-side switch is typically closed synchronously with the opening of a high-side switch coupled to an input voltage level to the buck converter. The power converter also includes a high-side controller and a low-side controller, which together are configured to adjust the timing of the operation mode of the high-side controller between a storage mode and the discharge mode.

Abstract: A method of controlling a power converter, including executing a plurality of cycles, including: turning on a first switch during a first period, the first switch coupled to a power supply and a switch node; turning on a second switch during a second period, the second switch coupled to the switch node; turning on a third switch at a first time during the second period and turning the third switch off at a second time after the second period by a first open signal including a high discharge signal followed by a lower discharge signal, the third switch coupled to an auxiliary node and to a second inductor coupled to the auxiliary node; and turning on a fourth switch at a third time after the second time and turning the fourth switch off during the first period of a succeeding cycle, the fourth switch coupled to the auxiliary node.

Abstract: We describe a photovoltaic (PV) panel system comprising a PV panel with multiple sub-strings of connected solar cells in combination with a power conditioning unit (microinverter). The power conditioning unit comprises a set of input power converters, one connected to each sub-string, and a common output power conversion stage, to provide power to an ac mains power supply output. Integration of the micro-inverter into the solar PV module in this way provides many advantages, including greater efficiency and reliability. Additionally, embodiments of the invention avoid the need for bypass diodes, a component with a high failure rate in PV panels, providing lower power loss and higher reliability.

Abstract: The present invention provides a three-port converter with magnetic integration and current ripple cancellation. With magnetic integration technology, the number of magnetic rings is reduced, and the number of driving coupling transformers is also reduced, thereby greatly reducing the size and weight of the whole converter; and with a current ripple cancellation branch, the amount of current ripples flowing through the three ports is very low and close to zero. The three-port converter of the present invention reduces the influence of electromagnetic interference and simultaneously saves the filter cost so that the busbar current and battery current are smoother.

Abstract: A polarity-selectable high voltage direct current power supply including a first drive assembly that transforms a first low voltage DC input into a first medium voltage alternating current output; a first HV output assembly that transforms the first LV AC output into a first HV DC output, wherein the first HV output assembly defines a first input stage; a polarity selector coupled between the second output junction of the first drive assembly and the first and second input stages of the first HV output assembly, the polarity selector operable between a first configuration and a second configuration; wherein in the first configuration the first HV DC output has a positive polarity; and wherein in the second configuration the first HV DC output has a negative polarity.

Abstract: A voltage generator and a flash memory thereof are provided. The voltage generator is used to provide a work reference voltage having a plurality of reference levels to a word line decoder circuit and includes a plurality of voltage trimming circuits. The voltage trimming circuits are connected in series between the work reference voltage and a ground voltage and respectively receive a trimming code, wherein the voltage levels of the work reference voltages are controlled by the trimming codes received by the voltage trimming circuits to select one of the reference levels.

Abstract: A high side transistor is coupled between a high potential side power source node and an intermediate node, and a recirculation diode is coupled between a low potential side power source node and the intermediate node, thereby forming a recirculation path when the high side transistor is OFF. A power source supply line couples the high potential side power source node with one end of the high side transistor. A surge recirculation device causes a current to flow in one direction, and a surge recirculation line couples the one end of the high side transistor to the high potential side power source node through the surge recirculation device, and causes a surge generated at the one end of the high side transistor to recirculate toward the high potential side power source node.

Abstract: An open-loop switch-mode boost converter includes a switching signal generator circuit that receives a time-varying input signal and outputs a switching signal. A duty-cycle of the switching signal has a first non-linear relationship to an amplitude of the time-varying input signal. An amplifier receives the switching signal and outputs a time-varying output signal, an amplitude of which has a second non-linear relationship to the duty-cycle of the switching signal. The time-varying output signal has a linear relationship to the time-varying input signal based on the first non-linear relationship and the second non-linear relationship. A filter circuit receives the time-varying output signal and outputs a filtered time-varying output signal which has a maximum frequency component that is substantially the same as a maximum frequency component of the time-varying input signal. The switching signal generator circuit is communicatively isolated from the voltage output node and the filter output node.

Abstract: An apparatus includes an inductor coupled to a load circuit, a control circuit, and a driver circuit. The control circuit may be configured to select a first operating mode in response to a determination that a value of current flowing through the inductor is greater than a threshold, and to otherwise select a second operating mode. In the first operating mode, the driver circuit may be configured to source current to the load circuit through the inductor for a first duration, based on a comparison of a supply voltage level to a voltage level across the load circuit. In the second operating mode, the driver circuit may be configured to source current to the load circuit through the inductor at a number of time points. At each time point the current may be sourced for a second duration that is based on an allowable peak current flowing through the inductor.

Abstract: Systems and methods for converting voltages between different voltage levels in a receiver are disclosed. In an aspect, a wireless power receiver apparatus for charging a chargeable device is provided. The apparatus includes a plurality of receive antennas disposed on a cover of the chargeable device, wherein at least one of the plurality of receive antennas is configured to wirelessly receive power according to a wireless charging protocol different from at least one other of the plurality of receive antennas. The apparatus includes a switching circuit disposed on the cover and configured to receive the wireless power from at least one of the plurality of receive antennas and selectively provide a respective voltage from a corresponding one of the plurality of receive antennas across an output configured to be connected to an input of the chargeable device.

Abstract: A power supply device includes a resistor that limits an electric current supplied from an AC power supply, a switching unit that is connected in parallel with the resistor, a rectifier circuit unit that is connected to a subsequent stage of the resistor and the switching unit and rectifies an AC voltage of the AC power supply, a booster circuit unit, a DC-voltage detection unit that detects a DC voltage output from the booster circuit unit, an AC voltage detection unit, a protection setting unit that compares a first protection voltage calculated on the basis of the boosting level by the booster circuit unit with a second protection voltage calculated based on the AC voltage detected by the AC-voltage detection unit and sets either one as a protection voltage, and a control unit that opens the switching unit when the DC voltage falls below the protection voltage and stops boosting.

Abstract: An energy storage (ES) circuit including a plurality of terminals configured to connect to a pulse load having an input voltage and drawing a low current during a first interval and a high current during a second interval, and connect to a power supply having a source voltage and delivering a source current, an energy storage capacitor connected to the plurality of terminals, and a bidirectional direct current (DC) to DC converter configured to recharge, during at least a portion of the first interval, the energy storage capacitor using a plurality of charge drawn from the source current, and reduce a drop in the input voltage during the second interval by delivering a difference between the source current and the high current to the pulse load using the plurality of charge stored in the energy storage capacitor.

Abstract: A photovoltaic intelligent power supply, comprising a plurality of unit modules, and a communication unit (103) and a control unit (106), wherein all the unit modules are connected to the control unit (106) and the communication unit (103); each unit module comprises an input collection unit (101), a data acquisition unit (102), a boost unit (104), an arc isolation unit (105) and an anti-PID unit (107), wherein the input collection unit (101) is connected to a photovoltaic module; the data acquisition unit (102) is configured to acquire voltage and current state signals; the boost unit (104) is configured to perform interleaving chopping and operate in an MPPT mode; the arc isolation unit (105) is configured to receive instructions sent by the control unit (106) to execute opening and closing; and the anti-PID unit (107) is configured to receive instructions sent by the control unit (106) so as to generate proper DC voltages to be applied between a negative electrode of a cell panel and the ground.