Abstract: A system that includes a regulator unit is disclosed. The regulator unit includes first and second phase units whose outputs are coupled to a common output node. Each of the phase units may be configured to source current to the output node in response to the assertion of a respective clock signal in order to generate a regulated supply voltage. Each phase unit includes a respective transconductance amplifier configured to generate a respective demand current dependent upon a reference voltage and the regulated supply voltage.

Abstract: A first voltage scaling power switch is coupled to a first power supply terminal for providing power to a first circuit portion, and a second voltage scaling power switch is coupled between the first power supply terminal providing power to a second circuit portion. A common power rail is coupled the first and second power input nodes during respective voltage scaling modes of the first and second circuit portions. A feedback circuit coupled to the common power rail provides a feedback signal to a control input of the first voltage scaling power switch to regulate a voltage provided by the first power switch, and to a control input of the second voltage scaling power switch to regulate a voltage provided by the second voltage scaling power switch.

Abstract: A DC-DC converting controller coupled to an output stage and an external resistor network and providing a pulse-width-modulation (PWM) signal to control the output stage to provide an output voltage is disclosed. The DC-DC converting controller includes a sensing circuit, a droop current circuit, a first pin and a PWM signal control loop. The sensing circuit, coupled to the output stage, provides a sensing current. The droop current circuit, coupled to the sensing circuit, provides a droop current according to the sensing current. The first pin, coupled to the droop current circuit and external resistor network, provides the droop current to make the external resistor network provide a second reference voltage. The PWM signal control loop, coupled to the external resistor network, generates a PWM signal according to the output voltage and the second reference voltage. The droop current is reduced to a default value with a default time.

Abstract: A photovoltaic module-mounted AC inverter circuit uses one or more integrated circuits, several power transistors configured as switches, several solid-dielectric capacitors for filtering and energy storage, several inductors for power conversion and ancillary components to support the above elements in operation. The integrated circuit includes all monitoring, control and communications circuitry needed to operate the inverter. The integrated circuit controls the activity of pulse-width modulated power handling transistors in both an input boost converter and a single-phase or multi-phase output buck converter. The integrated circuit also monitors all power processing voltages and currents of the inverter and can take appropriate action to limit power dissipation in the inverter, maximize the available power from the associated PV module and shut down the inverter output if the grid conditions so warrant.

Abstract: Disclosed are multi-stage multilevel DC-DC step-down converters. Stages may include three or four switches, and switches of each stage are operated at selected duty cycles such that each stage reduces an input voltage by one-half and voltage stress on switches is reduced. In some embodiments only a single output inductor is used in an LC filter, and the inductor may be very small as compared with a conventional Buck converter. Thus, embodiments provide DC-DC step-down converters with high power density and efficiency.

Abstract: A power supply includes a power converter, a reference voltage generator, and a controller. During operation, the power converter produces an output voltage to power a load. The reference voltage generator (such as a voltage mode amplifier circuit) generates a floor reference voltage, a magnitude of which varies as a function of the output voltage. The controller compares an output voltage feedback signal (derived from the output voltage) to the floor reference voltage to produce control output to control timing of activating switches in the power converter to maintain the output voltage within a desired voltage range.

Abstract: A circuit generates an output voltage from an input voltage and includes a Pulse Width Modulation (PWM) controller. The PWM controller initiates a PWM pulse according to a first comparison that uses a Current Sense and Ramp (CSR) signal and an error signal. The PWM controller ends the PWM pulse according to a second comparison that uses the CSR signal and a threshold signal. The CSR signal is generated using a current sense signal and a ramp signal according to the input voltage. The error signal is generated from the output voltage and a reference voltage. In an embodiment, the circuit is one of a plurality of substantially identical modules, wherein one module is a master module. The master module generates an error signal used by each module. A clock input of each module is respectively connected to a clock output of another module to sequentially activate each of the modules.

Abstract: A sense resistor is placed in series with an output capacitor of a buck converter. The buck converter operates in a discontinuous mode such that there is a dead time in each switching cycle. A control circuit senses a voltage across the sense resistor and thereby generates a first signal ICS. The control circuit detects an offset voltage in ICS, where the offset voltage is the voltage of ICS during the dead time in a first switching cycle. The control circuit level shifts the entire ICS by the offset voltage, thereby generating a second signal ICLS. ICLS has the same waveform as the waveform of the inductor current. In a second cycle, ICLS is used to determine when to turn off the main switch and when the start of the dead time occurs. ICLS and the offset voltage are used together to determine when to turn the main switch on.

Abstract: Embodiments of voltage regulators and methods for operating a voltage regulator are described. In one embodiment, a voltage regulator includes a power stage configured to convert an input direct current (DC) voltage into an output DC voltage, a driver device configured to drive the power stage, a timer configured to generate a constant on-time signal, a ripple generation device configured to generate a ripple signal, a comparator configured to perform voltage comparison in response to the ripple signal to generate an input to the timer, and a controller configured to generate a drive signal for the driver device in response to an inductor peak current in the voltage regulator and the constant on-time signal. Other embodiments are also described.

Abstract: The present invention is directed toward a switching power supply and improvements thereof. In accordance with an embodiment, a switching power supply is provided.

Abstract: Described is an apparatus which comprises: an output node; a capacitor; an inductor having a first terminal coupled to the output node, and a second terminal coupled to the capacitor; a bridge to receive an input power supply and to generate a switching voltage signal at the output node; and a current sensor to determine slope of the switching voltage signal on the output node.

Abstract: Systems, apparatuses, and methods for generating a stable output voltage for one or more components by checking feedback information for an entire clock period are described. In various embodiments, a power converter generates an output voltage for one or more components. When the load current drawn by the one or more components changes, an inductor current of a low pass filter and monitored by a current sense amplifier also changes. The clock period is divided into a high phase and a low phase with one of the phases being a relatively short phase. During the relatively short phase, the current sense amplifier does not have sufficient time to measure feedback information. Instead of selecting a voltage output of the current sense amplifier, control logic selects a voltage output of a voltage generator, which emulates a voltage ramp with a slope of the inductor current during the relatively short phase.

Abstract: Systems, methods, and apparatus for use in biasing and driving high voltage semiconductor devices using only low voltage transistors are described. The apparatus and method are adapted to control multiple high voltage semiconductor devices to enable high voltage power control, such as power amplifiers, power management and conversion (e.g. DC/DC) and other applications wherein a first voltage is large compared to the maximum voltage handling of the low voltage control transistors. According to an aspect, timing control of edges of a control signal to the high voltage semiconductor devices is provided by a basic edge delay circuit that includes a transistor, a current source and a capacitor. An inverter can be selectively coupled, via a switch, to an input and/or an output of the basic edge delay circuit to allow for timing control of a rising edge or a falling edge of the control signal.

Abstract: A DC-to-DC voltage converter includes a converter input for receiving a DC voltage. A first switch is coupled between the input and a first node. A second switch is coupled between the first node and a ground. An inductor is coupled between the first node and a converter output. A capacitor is coupled between the converter output and ground. An output voltage synthesizer is coupled to the converter input and the converter output for synthesizing the voltage at the first node and for generating a control signal for at least one of the first switch and the second switch in response to the voltages at the converter input and the converter output.

Abstract: According to one aspect, embodiments of the invention provide a power supply system comprising an input line configured to receive input AC power, a rectifier having an input coupled to the input line and an output, a switch having a first end coupled to the output of the rectifier and a second end selectively coupled to an inductor, a capacitor coupled to the inductor, and control circuitry coupled to the inductor and the capacitor, wherein the control circuitry is configured to control the switch to selectively couple the output of the rectifier to the inductor to generate a first DC power level, operate in a first mode of operation while receiving the first DC power level, detect a phase angle of the rectified AC power, and transition into a second mode of operation in response to detection of the phase angle.

Abstract: A method for controlling a power converter includes determining whether a value of a feedback signal is in a first range, detecting a plurality of points of the feedback signal, and decreasing one or both of a proportional coefficient and an integral coefficient of a first control loop of the power converter at a first plurality of times corresponding to the detected plurality of points of the feedback signal when the value of the feedback signal is in the first range. The feedback signal indicates an output signal of the power converter. A circuit for controlling a power converter includes a transient detector that generates a transient detection signal in response to a feedback signal indicating an output signal of the power converter and a gain selector that generates a gain selection signal in response to the transient detection signal.

Abstract: A low-dropout voltage regulator (2) comprises: a differential amplifier portion (4) including a first amplifier input connected to a reference voltage (16), a second amplifier input, and a differential output which is determined by a difference between the reference voltage and a voltage on the second amplifier input; an output portion (10) arranged to provide a regulator output voltage (62) which is controlled by the differential output of the amplifier portion, the second amplifier input being connected to or derived from (70) the regulator output voltage; and a biasing portion (8) arranged to measure an external load current and to provide a biasing current to the differential amplifier portion which depends on the load current.

Abstract: The amount of power being output to the load is sensed by sampling the frequency of the pulse width modulation signal that is controlling the switch that is providing the power to the load. If the pulse width modulation signal has a high frequency, then it will be providing higher power to the load. As the power drawn by the load decreases, the frequency of the pulse width modulation power supply signal will decrease. By sensing and periodically sampling the frequency of the pulse width modulation signal that is providing power, the demand of the load can be quickly and accurately determined. As the power demand of the load decreases, the peak current that the power supply switch can provide also decreases. The permitted peak current dynamically changes to adapt to the power drawn by the load.

Abstract: An apparatus for electric power conversion includes a converter having a regulating circuit and switching network. The regulating circuit has magnetic storage elements, and switches connected to the magnetic storage elements and controllable to switch between switching configurations. The regulating circuit maintains an average DC current through a magnetic storage element. The switching network includes charge storage elements connected to switches that are controllable to switch between plural switch configurations. In one configuration, the switches forms an arrangement of charge storage elements in which at least one charge storage element is charged using the magnetic storage element through the network input or output port. In another, the switches form an arrangement of charge storage elements in which an element discharges using the magnetic storage element through one of the input port and output port of the switching network.

Abstract: A power converter using constant on-time (COT) or ramp pulse modulation (RPM) control achieves more rapid resumption of steady-state operation after a step-up load transient by extending an on-time of a switching pulse by interrupting a ramp voltage waveform that is compared with a threshold that equals a threshold voltage at the termination of a switching pulse or increasing a voltage with which the ramp voltage is compared. These techniques are applied to both single-phase and multi-phase power converters.

Abstract: According to an aspect, an electronic device includes a switching converter configured to generate an output voltage with a first voltage level from a battery voltage in a run mode of the electronic device. The switching converter is configured to generate the output voltage with a second voltage level from the battery voltage in a sleep mode of the electronic device. The second voltage level is less than the first voltage level. The switching converter includes a clocked comparator, and a voltage comparator. The switching converter is configured to generate the output voltage with the first voltage level in the run mode using the clocked comparator. The switching converter is configured to generate the output voltage with the second voltage level in the sleep mode using the voltage comparator.

Abstract: This conversion system for converting electric energy is intended to be connected to a load, and includes the connection terminals, that are capable of being connected to the load, an electric energy converter, and a filter including at least one capacitor. This conversion system for converting electric energy additionally also includes a switching module configured in order to switch between a first configuration in which the filter is connected between the converter and the connection terminals and a second configuration in which the converter is connected directly to the connection terminals, with the filter being bypassed.

Abstract: Disclosed herein is a power converter with low step down conversion ratio with improved power conversion efficiency. The power converter includes a first inductor to receive the input voltage, and a second inductor to supply the output voltage to a load. The first inductor and the second inductor are electromagnetically coupled to each other. The power converter further includes a first switch coupled between the first inductor and the second inductor. The first switch is switched according to a pulse having a frequency corresponding to a resonant frequency of (i) a series inductance between the first inductor and the second inductor and (ii) a parallel capacitance across the first switch. The power converter further includes a second switch coupled to the first switch and the second inductor to supply a reference voltage to the second inductor according to another pulse having the frequency.

Abstract: The present disclosure shows a reconfigurable Dickson Star SC regulator that can support multiple conversion ratios by reconfiguring between various modes. The reconfigurable Dickson Star SC regulator is designed to reduce the number of redundant capacitors by reusing capacitors and switches across multiple modes of operation (across multiple conversion ratios). The present disclosure also shows a hybrid (e.g., two-stage) voltage regulator.

Abstract: A voltage conversion device and a voltage conversion method are provided in which, even immediately after switching a switching frequency, it is possible to suppress fluctuation of output voltage and possible to output a constant voltage in a stable manner. When switching the switching frequency from a first frequency to a second frequency, a duty ratio is changed in a first cycle of a PWM signal immediately after switching so as to be smaller than the duty ratio before switching. The amount of change in this case is set such that a lower limit value of inductor current immediately after switching the switching frequency matches the lower limit value in a steady state. With this sort of change, an increase in the inductor current immediately after switching is suppressed, fluctuation of the output voltage is suppressed, and a stable constant voltage is outputted to a load.

Abstract: The present disclosure shows a reconfigurable Dickson Star SC regulator that can support multiple conversion ratios by reconfiguring between various modes. The reconfigurable Dickson Star SC regulator is designed to reduce the number of redundant capacitors by reusing capacitors and switches across multiple modes of operation (across multiple conversion ratios). The present disclosure also shows a hybrid (e.g., two-stage) voltage regulator.

Abstract: A multiphase power regulator includes a plurality of phases coupled in parallel to provide a load current as a combination of phase currents at an output voltage, each phase including at least one power transistor switched to provide a respective phase current based at least in part on a comparator output signal, and a current-sense low pass filter to sense the phase current. The regulator further includes a gm stage to generate the current set point voltage based at least in part on the output voltage, a comparator to compare a voltage from the current-sense low pass filters to the current set point voltage and a current set point adjustment circuit to provide an auxiliary control signal to decrease the current set point voltage responsive to a change in comparator output and then to increase the current set point voltage responsive to another change in comparator output.

Abstract: An overcurrent detection circuit, which detects overcurrent of a load driving device arranged to drive a capacitance load by switching a voltage applied to the capacitance load between high level and low level, includes a clock signal generation unit arranged to generate a clock signal, a comparing unit arranged to compare a physical quantity corresponding to current supplied from the load driving device to the capacitance load with a predetermined value, and a determination unit arranged to determine whether or not the load driving device is in an overcurrent state based on the clock signal and a result of the comparison by the comparing unit, during a period in which the load driving device applies a high level voltage to the capacitance load.

Abstract: A processing system includes multiple processors in which a first processor operates at a first clock frequency and first supply voltage at all times. At least one processor is dynamically switchable to operate at the first clock frequency and first supply voltage resulting in the first and second processors providing symmetrical multi-processing (SMP) or at a second clock frequency and a second supply voltage resulting in the first and second processors providing asymmetrical multi-processing (ASMP). An integrated controller (e.g., finite state-machine (FSM)) controls not only voltage change, but also clock-switching. Various criteria can be used to determine when to switch the at least one switchable processor to improve power consumption and/or performance. Upon receipt of a switching command to switch between SMP and ASMP, a series or sequence of actions are performed to control a voltage supply and CPU/memory clock to the switchable processor and cache memory.

Abstract: An AC/DC converting apparatus having first and second input nodes for receiving an AC input voltage Vin, a first pair of switches for coupling a first terminal of a first inductor to the first input node and ground, a second pair of switches for coupling a second terminal of the first inductor to an output node for providing a DC output voltage Vout and ground, a third pair of switches for coupling a first terminal of a second inductor to the second input node and ground, and a fourth pair of switches for coupling a second terminal of the second inductor to the output node and ground. The first pair of switches is turned ON when Vin is in a first portion having a first polarity, the third pair of switches is turned ON when Vin is in a second portion having a second polarity.

Abstract: A power supply system (2) for vehicles, comprising an electric machine (6), a DC-AC converter (8) having a DC connection and an AC connection, and an energy storage element (4) wherein the energy storage element (4) can be connected to the DC connection and the electric machine (6) can be connected to the AC connection, wherein the electric machine (6) can be operated using the energy stored in the energy storage element (4), characterised in that a DC-DC converter (14) is arranged between the energy storage element (4) and the converter (8) and an external power supply (12) can be coupled into the DC-DC converter (14) for charging the energy storage element (4) wherein the DC-DC converter (14) can be uncoupled from the converter (8) in the event of power supply.

Abstract: A power supply system having a detection system for determining an unbalanced current condition and an over-current condition in a DC-DC voltage converter is provided. The detection system has a detection circuit that outputs a first diagnostic voltage indicating an unbalanced current condition between first and second switching banks in the DC-DC voltage converter based on a first voltage and an average voltage, or an over-current condition in the first switching bank based on the first voltage. The detection circuit outputs a second diagnostic voltage indicating the unbalanced current condition between the first and second switching banks in the DC-DC voltage converter based on a second voltage and the average voltage, or an over-current condition in the second switching bank based on the second voltage.

Abstract: A switching device comprises a first and second connector, a first and second input, an output, a switch connected between the first connector and the second connector, a current sensor configured to measure a current flowing through the switch, and a controller connected to the current sensor, the switch, the first input, the second input, and the output. The controller is configured to: operate the switch based on a first control signal at the first input; connect the second control signal at the second input to the output; operate the switch to open in response to the current flowing through the switch exceeding a predetermined current limit; and disconnect the second control signal from the output in response to the current flowing through the switch exceeding the predetermined current limit.

Abstract: A control circuit in a switching regulator, the switching regulator including an inductor and a switching circuit configured to control a current passing through the inductor in response to a control signal, the control circuit configured to receive a feedback voltage of an output voltage of the switching regulator and receive the current passing through the inductor as a current sensing signal. The control circuit includes a first internal signal generator configured to generate a first internal signal based on the feedback voltage and a reference voltage, a second internal signal generator configured to generate a second internal signal based on the current sensing signal such that a base level of the second internal signal varies according to the feedback voltage and the reference voltage, and a comparator configured to output the control signal based on the first and second internal signals.

Abstract: A photovoltaic system having an inverter and a photovoltaic generator connected to an inverter input is configured to track an operating voltage of maximum power from the photovoltaic generator. The system also includes an energy store coupled in parallel with the photovoltaic generator, to the input of the inverter. A temporal profile of the power output by the photovoltaic generator is recorded by the converter and compensates for fluctuations in power from the photovoltaic generator in comparison with a target power by adapting the power (PDC) output by it at the input or branched off from there in such a manner that the sum of the power (PDC) from the converter and the power (PPV) from the photovoltaic generator is equal to the target power (PSoll). The converter is operated in a tracking mode that it makes it possible to track the operating voltage of maximum power by means of the inverter.

Abstract: A circuit and method for controlling a power converter having a high-side and a low-side switch are provided. The circuit may include a comparator configured to receive a reference voltage at a first input and a ramp voltage at a second output, and to output a delay signal based on a comparison of the reference voltage and the ramp voltage. The delay signal may be configured to turn on one or more of the high-side switch and the low-side switch. The circuit may increase or decrease the reference voltage based on a dead time, which equals an amount of time when the high-side switch and the low-side switch are turned off. The circuit may include a first switch that is controlled to lower the reference voltage if a dead time exceeds a first threshold, and a second switch that is controlled to raise the reference voltage if the dead time delay signal is below a second threshold.

Abstract: Power converters that use bi-directional switches to rectify an AC power source, rather than diode bridges, are provided. In additional to performing rectification, the bi-directional switches also control power flow through the power converter, i.e., the switches effectively implement a switching power supply to provide a desired DC voltage to a load. The use of bi-directional switches that can block current flow in either direction enables a power converter that uses minimal circuitry, has low conduction losses (high efficiency), and can operate in buck and boost modes. Furthermore, via appropriate control, the described power converter circuitry may be used both for converting from AC voltage to DC voltage, and from DC voltage to AC voltage.

Abstract: An electronic device includes a first switching element connected between a power source and one end of a power inductor, a second switching element connected between the one end of the power inductor and ground, a detection unit that detects a current flowing to the second switching element when a period in which the first switching element is in an off-state and the second switching element is in an on-state, and a control unit. The control unit uses the detected current to gradually decrease an on-resistance of the first switching element, when the first switching element is changed from the off-state to an on-state, and uses the detected current to gradually increases an on-resistance of the second switching element, when the second switching element is changed from the on-state to an off-state.

Abstract: A semiconductor circuit converts an applied input voltage into a desired output voltage and outputs the same from a voltage output terminal. A first resistor, a second resistor, and a third resistor are connected in series between the voltage output terminal and a ground terminal. When a switch is brought to an open state, an output voltage based on a voltage divided by a combined resistance of the second and third resistors and the first resistor is supplied. When the switch is brought to a closed state, an output voltage based on a voltage divided by the second and first resistors is supplied. The semiconductor circuit has a configuration of controlling the resistance value of each voltage division resistor by a control signal from the outside.

Abstract: A direct-current voltage conversion circuit and a liquid crystal display device are disclosed. The direct-current voltage conversion circuit includes a control chip, a conversion circuit and a protection circuit, wherein, the control chip is electrically connected to the conversion circuit, the control chip generates a control signal and an original voltage signal; the conversion circuit receives the control signal and the original voltage signal, and under a controlling of the control signal, obtaining a direct-current voltage signal according to the original voltage signal; the protection circuit detects if the conversion circuit generates an abnormality according to the direct-current voltage signal, and turning off the conversion circuit when the conversion circuit generates the abnormality.

Abstract: A synchronous buck converter is provided in which a replica transistor has its drain coupled to a drain of the low-side switch transistor. A current sensing amplifier drives a scaled current into the replica transistor such that the drain-to-source voltage of the replica transistor substantially equals the drain-to-source voltage of the low-side switch. The replica transistor is much smaller than the low switch transistor such that the replica transistor's on resistance is higher by a scale factor Kf as compared to the on resistance for the low-side switch transistor.

Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).

Abstract: A control circuit includes: a comparing circuit, having a first input terminal and second input terminal, configured to operably generate a comparison signal according signals received by the first and second input terminals, wherein the first input terminal is utilized for coupling with a reference signal and the second input terminal is utilized for coupling with a feedback signal; a periodic signal generating circuit configured to operably generate a periodic signal and apply the periodic signal to the first input terminal or the second input terminal of the comparing circuit; and a control signal generating circuit for controlling an on time of a power switch according to the comparison signal. The periodic signal generating circuit clamps a limit of the periodic signal to a predetermined value, but does not configure the slope of the periodic signal to be zero when there is no current passing through the inductor.

Abstract: A vehicle power control method for jump-start uses a vehicle control system that includes a low voltage DC/DC converter for converting a voltage of a high voltage battery to a low voltage to be output and a junction box for connecting the low voltage DC/DC converter to an auxiliary battery and load. The vehicle power control method includes a jump-start preparation step in which when the auxiliary battery is in a discharge condition, a first relay, which connects or disconnects the junction box to or from the auxiliary battery, is turned off and a second relay, which connects or disconnects the junction box to or from a jump-start power supply connection terminal, is turned on; and a jump-start completion step in which, after a vehicle starts by a power inputted through the jump-start power supply connection terminal, the second relay is turned off, and the first relay is turned on.

Abstract: A control system for transitioning a DC-DC voltage converter from a buck operational mode to a safe operational mode is provided. The DC-DC voltage converter has a DC-DC voltage converter control circuit with a high side integrated circuit and a low side integrated circuit. The high side integrated circuit has a first plurality of FET switches therein. The low side integrated circuit has a second plurality of FET switches therein. The control system includes a microcontroller having a digital input-output device, first and second applications, and a hardware abstraction layer. The first application sends a first command value to the hardware abstraction layer in order to transition the first and second plurality of FET switches to the open operational state.

Abstract: A control circuit for a switched mode power supply (SMPS) has an input voltage reference voltage generator arranged to receive a signal indicative of an input voltage of the SMPS and is arranged to generate a reference signal directly proportional to the input voltage. An error signal generator of the control circuit is arranged to receive a signal indicative of an output voltage of the SMPS and arranged to generate an error signal based on the reference signal generated by the input reference voltage generator and based on the output voltage of the SMPS. A duty cycle control signal generator of the control circuit is arranged to generate a control signal, to control the duty cycle of the SMPS, in dependence upon the error signal.

Abstract: In one embodiment, a radio receiver includes: a programmable frequency synthesizer to generate a first clock signal; a first frequency divider to divide the first clock signal to generate a master clock signal; a second frequency divider to divide the master clock signal to generate a mixing signal; and a mixer to downconvert a radio frequency (RF) signal to a second frequency signal using the mixing signal. A voltage converter to couple to the radio receiver includes a switch controllable to switchably couple a first voltage to a storage device and a pulse generator to generate at least one pulse pair formed of a first pulse and a second pulse substantially identical to the first pulse, when a second voltage is less than a first threshold voltage, the second pulse separated from the first pulse by a pulse separation interval.

Abstract: Systems, methods, and apparatus for use in biasing and driving high voltage semiconductor devices using only low voltage transistors are described. The apparatus and method are adapted to control multiple high voltage semiconductor devices to enable high voltage power control, such as power amplifiers, power management and conversion (e.g. DC/DC) and other applications wherein a first voltage is large compared to the maximum voltage handling of the low voltage control transistors. A parallel resistive-capacitive coupling allows transmission of edge information and DC level information of control signals from a static voltage domain to a flying voltage domain. A flying comparator operating in the flying voltage domain uses clamps to force an output difference voltage that is zero only during a switching event of the flying voltage domain. A charge pump may be used to amplify inputs to the parallel-resistive coupling for a desired differential signal amplitude to the flying comparator.

Abstract: A switching control circuit includes: a feedback control part that turns on/off an output switch element so that an output voltage of a switching output circuit becomes to be a target value; a synchronous control part that turns on/off a synchronous rectification element; and a reverse current detection part that detects a reverse current during a turning-on period of the synchronous rectification element, wherein the synchronous control part has operation modes including: an asynchronous mode in which the synchronous rectification element is always turned off; and a synchronous mode in which the synchronous rectification element is turned on when the output switch element is turned off, and is turned off when the reverse current reaches a predetermined reverse current detection level, and wherein the reverse current detection level is gradually raised when the synchronous control part is switched from the asynchronous mode to the synchronous mode.

Abstract: A control circuit for a switching regulator can include: an ON signal generator that generates an ON signal; an OFF signal generator that generates a first control signal according to an input voltage and an output voltage of the switching regulator; an on time regulator that generates an adjustment signal according to a switching signal and the first control signal; and a logic circuit configured to generate an off signal according to the first control signal, and to generate the switching signal according to the ON signal and the OFF signal, where the on time of the first switch is regulated according to the off time of the first switch when the off time of the first switch is less than the reference time, in order to regulate a duty cycle of the switching signal.