Abstract: An apparatus includes a first circuit path including a series combination of a primary winding of a transformer and a first secondary winding of the transformer and a second circuit path including a second secondary winding of the transformer. The primary winding of the transformer is magnetically coupled to the first and second secondary windings of the transformer and the primary winding of the transformer is detachably coupled to each of the first and second secondary windings of the transformer. The primary winding of the transformer is operative to generate a portion of an output current based on energy received from the primary winding of the transformer, and the second secondary winding of the transformer is operative to generate a remaining portion of the output current based on energy received from the second secondary winding of the transformer.

Abstract: A bootstrap circuit unit of a DC-DC converter applies, to a drive unit, a voltage that is higher than that at a first connection point between switching elements in a first conversion operation, and applies, to the drive unit, a voltage that is higher than that at a second connection point between switching elements in a second conversion operation. A charge-pump circuit unit steps up an input voltage and applies the resulting voltage to the drive unit. The drive unit sets the voltage of a first drive signal and a second drive signal according to a voltage applied by the bootstrap circuit unit or a voltage applied by the charge-pump circuit unit. The charge-pump circuit unit determines the operation timing at which the charge-pump circuit unit is to apply the output voltage, based on the first and second voltage, and the first and second power supply unit charging signals.

Abstract: A power voltage generator includes: an input voltage providing part outputting input voltage based on a first signal; an inductor receiving the input voltage to generate an inductor current and connected to an outputting part; the outputting part generating an output voltage based on the inductor current and generating a feedback voltage; an output sensing part sensing the output voltage based on a second signal and generating an output sensing voltage; a peak voltage generator generating a peak voltage based on the input voltage, set data corresponding to an output set voltage, and ripple data corresponding to a ripple set voltage; a first comparing part generating a stop signal based on the output sensing and peak voltages; a second comparing part generating a start signal based on the set data and feedback voltage; and a switch controller generating the first and second signals based on the start and stop signals.

Abstract: An active noise source apparatus includes a pair of a first and second switched-biased noise amplifier branches (22, 23). A directional coupler (24) having a pair of input ports (3, 4) connected to combine the noise outputs from the first and second switched-biased noise amplifiers. One output port (4) of the directional coupler (24) is connected to a matched termination (Rtermination) and another output port (2) of the directional coupler (24) is connected to an output (25) of the active noise source.

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

Abstract: A control device for controlling a temperature of a laser device includes a pulse width modulation (PWM) signal generator, a temperature acquisition circuit, a voltage comparator, and a logic circuit. The a pulse width modulation (PWM) signal generator configured to generate a PWM signal; a temperature acquisition circuit configured to acquire a temperature of the laser device and convert the temperature into a measurement voltage; a voltage comparator configured to compare the acquired measurement voltage associated with the temperature of the laser device with a temperature threshold voltage and output a comparison result signal; and a logic circuit configured to generate a drive signal based on the PWM signal and the comparison result signal to drive the laser device.

Abstract: A switching power converter is provided that communicates with a mobile device to receive a value of a load detection current. The switching power converter adjusts the cycling of a power switch until a constant current mode of operation is entered with a known output current driving the mobile device. The switching power converter subtracts the load current from the output current to measure a soft-short circuit current.

Abstract: The present application provides a logic circuit and a display panel. One end of a switching control module of the logic circuit is connected in series with a voltage adjusting control module, and another end of the switching control module is connected in series with a switch component of a voltage adjusting module. Also, the switching control module connected in series with the same switch component has at least two different operational currents for a corresponding switch component to have different switching speeds for alleviating the problem of excessive electromagnetic interference (EMI) occurred in a power management chip of existing LCD products.

Abstract: This switching power supply 1 has: a switch output stage (101, D1, L1, C2) which generates an output voltage Vout by rectifying and smoothing a switch voltage Vsw that is pulse-driven in response to ON/OFF of an output transistor 101; and a discharge circuit 120 which discharges an output voltage Vout when a state in which the output voltage Vout exceeds a target value continues for a period longer than a prescribed time period. For example, the discharge circuit 120 includes a discharge transistor M1 that is connected to and between a voltage application end of the switch voltage Vsw and a grounding end. The discharge transistor M1 is turned ON/OFF periodically or is kept ON continually for discharge of the output voltage Vout.

Abstract: A system includes a transformer, a first controller, a discharge circuit to discharge an external capacitor based on an undervoltage threshold, and a second controller. The second controller is coupled to the discharge circuit, and is also coupled to receive a rectified Ac voltage and to receive control signals from the first controller. The second controller includes a gate driver to turn on a primary field effect transistor (FET). The second controller also includes a startup controller coupled to the gate driver. The startup controller is configured to increase a duty cycle of the primary FET based on whether a control signal is received from the first controller. The startup controller is also configured to determine a current duty cycle of the primary FET and to turn off the primary FET based on whether the voltage of the AC-DC converter is above an undervoltage threshold.

Abstract: A magnetic structure in a power converter includes at least two multilayer boards, such as a primary board containing the primary windings and some auxiliary windings, and a secondary board containing the secondary windings and some auxiliary windings. The primary and secondary boards are on top of each other. On the layer on the primary board adjacent to the secondary board, is a dual function shield to reduce the total common mode noise in the converter towards zero. The controlled dual function shield can be placed on the secondary board on the layer adjacent to the primary board, and in some embodiments can be placed on both primary and secondary board on the layers adjacent to the other board. The embodiments herein offer a very good solution for cost reduction of the planar transformers and offers an avenue for total elimination of the common mode noise in a power converter.

Abstract: Provided by the present application are a Direct Current (DC) micro-grid system, a charging loop circuit and a control method thereof. The charging loop circuit selectively connects a charging loop to a first side loop or a second side loop through a set of switches.

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: An operating method of a voltage converter, includes converting an input voltage to an output voltage and providing a load current corresponding to the output voltage in a pulse frequency modulation mode or a pulse width modulation mode, entering the pulse frequency modulation mode in response to an amount of the load current being less than or equal to a first threshold value, and entering the pulse width modulation mode in response to the amount of the load current being greater than a second threshold value.

Abstract: A switching regulator includes a power stage circuit and a controller circuit. The controller circuit includes a first amplification circuit, a second amplification circuit, a ramp signal generation circuit, and a comparator. The first amplification circuit generates an amplification signal according to a difference between a low-pass filtered signal and a feedback signal. The second amplification circuit generates an adjustment signal according to a difference between the feedback signal and a fast response signal. The comparator generates a pulse width modulation signal according to a difference between the amplification signal and a ramp signal to generate a switch control signal. The adjustment signal adaptively adjusts the amplification signal or the ramp signal. The low-pass filtered signal is related to a signal generated by filtering out higher frequency part of the reference signal, and the reference signal is related to a dynamic change of a target level of the output voltage.

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: In one embodiment, a method includes transmitting multi-phase pulse power from power sourcing equipment to a powered device in a data center, wherein the multi-phase pulse power comprises multiple phases of power delivered in a sequence of pulses defined by alternating low direct current voltage states and high direct current voltage states, and synchronizing the pulses at the power sourcing equipment with the pulses at the powered device.

Abstract: The present disclosure relates to the field of electric power system, and more particularly to a topology of a series-connected MMC with a small number of modules, where the topology is composed of a three-phase bridge circuit, half-bridge valve strings, a three-phase filter inductor, and a three-phase grid frequency transformer. The topology of a series-connected MMC with a small number of modules in the present disclosure needs only two half-bridge valve strings, thus greatly reducing the number of the submodules as compared with the conventional MMC structure. When achieving the same high DC voltage output, the present disclosure can improve the power density of the MMC, realize stable three-phase AC output voltage, and further achieve balance of capacitor voltages in the two half-bridge valve strings.

Abstract: A low-power semiconductor device is provided. A retention transistor is provided between a control circuit and an output transistor. An output terminal of the control circuit is electrically connected to one of a source and a drain of the retention transistor, and the other of the source and the drain of the retention transistor is electrically connected to a gate of the output transistor. A node to which the other of the source and the drain of the retention transistor and the gate of the output transistor are electrically connected is a retention node. When the retention transistor is in an on state, a potential corresponding to a potential output from the control circuit is written to the retention node. Then, when the retention transistor is in an off state, the potential of the retention node is retained. Thus, a gate potential of the output transistor can be kept at a constant value even when the control circuit is off.

Abstract: A feedback control circuit is described herein, comprising: an operational amplifier (op-amp) integrated circuit, wherein a first output of the op-amp provides a feedback error control signal; at least two transistors provided in a feedback path between the first output of the op-amp and an inverting input to the op-amp; and a plurality of discrete electrical components in the feedback path, such that in the response to either an increase or decrease of an inverting input voltage at the inverting input that exceeds a predetermined level, will speed up substantially. The feedback control circuit provides the feedback error control signal.

Abstract: A step-up power-converter has stack nodes, each of which connects to a stack switch and to a pump capacitor to form a switched-capacitor network. Among the stack nodes are first and second stack-nodes. The second stack-node drives a particular stack switch from the plurality of stack switches. When all of the stack switches are open, the first voltage causes the first stack-node to have a first stack-node voltage and causes the second stack-node to have a second stack-node voltage that is less than the first stack-node voltage. During the first state, the second stack-node voltage is insufficient to drive the particular stack-switch. During the second state, the second stack-node voltage is sufficient to drive the particular stack-switch. Causing the switched-capacitor network to transition from the first state to the second state includes, among other things, causing the second stack-node voltage to become sufficient to drive the particular stack-switch.

Abstract: A switching power converter is provided with a one-shot bias boosting circuit that responds to a premature trip point to boost the performance of a linear comparator in a pulse width modulator. In a sense-amplifier based implementation of the comparator, a clock-edge generator boosts the performance of the sense amplifier at the premature trip point.

Abstract: An integrated circuit. The integrated circuit comprises a timebase generator and a switch mode direct current-to-direct current (DC-to-DC) voltage converter coupled to the timebase generator. The timebase generator comprises a first linear feedback shift register (LFSR), a signal generator having an input coupled to an output of the first LFSR; and a digital divider comprising a second LFSR and a programmable digital divider, wherein a clock input of the programmable digital divider is coupled to an output of the signal generator, wherein an output of the programmable digital divider is coupled to a clock input of the first LFSR and is coupled to a clock input of the second LFSR, and wherein an output of the second LFSR is coupled to a program input of the programmable digital divider.

Abstract: A current output circuit includes an input circuit that outputs a second current in response to a first current when the first current is inputted, an output circuit that outputs a third current in response to the second current, and a control circuit that causes the output circuit to output a current when a control signal is inputted before the first current is inputted to the input circuit. The output circuit includes transistors of a first group and the input circuit includes transistors of a second group.

Abstract: A method for operating clocked and regulated electronic power converters may be contained in operating devices for light-emitting diodes. An associated regulating circuit may include at least one regulating amplifier having at least two regulating inputs, from the output of which a negative feedback network runs to one of its regulating inputs, a first input for the signal for a target value of the average of the output power to be regulated, and a second input which forwards a signal for the target value of a waveform or of a pulse pattern for the output power to be regulated to one of the regulating inputs via a DC current-blocking high-pass filter.

Abstract: A power converter is provided. The power converter includes a switched-capacitor conversion circuit and an inductor buck circuit. The switched-capacitor conversion circuit receives an input voltage at an input terminal and performs a switching operation to convert the input voltage to an intermediate voltage. The inductor buck circuit is coupled to an output terminal of the switched-capacitor conversion circuit to receive the intermediate voltage and operates at a constant on-time to generate an output voltage at a conversion output terminal according to the intermediate voltage. The inductor buck circuit includes an inductor. In response to that a state of an inductor current used for charging the inductor corresponds to a predetermined condition, a switching action of the switching operation is enabled, so that the switched-capacitor conversion circuit is switched from a first turned-on state to a second turned-on state.

Abstract: A switching control circuit controls switching of a switching device, which controls a resonance current of a resonant converter, with a frequency corresponding to an output voltage of the resonant converter. The switching control circuit includes a detection circuit configured to detect a difference between a first timing at which the switching device is turned on and a second timing at which a polarity of the resonance current reverses, and a signal output circuit configured to output a driving signal with a preset minimum frequency, responsive to the difference becoming so small as to satisfy a predetermined condition.

Abstract: An example electrical power system includes a bus current controller configured to adjust a direct current (DC) provided on a DC bus, and a plurality of energy storage modules (ESMs). Each ESM includes at least one energy storage device, and includes a DC/DC converter configured to control charging of the at least one energy storage device from the DC bus and discharging of the at least one energy storage device onto the DC bus. A shared system controller is configured to control the bus current controller and the plurality of DC/DC converters. A method of controlling an electrical power system is also disclosed.

Abstract: A DC-DC converter includes: a first capacitor, a second capacitor, a first switch device, a second switch device, a third switch device, a fourth switch device, a flying capacitor, where one end of the flying capacitor is coupled to the first intermediate node, the other end of the flying capacitor is coupled the second intermediate node; and the protective circuit, including a clamping unit and a buffering unit, where when a voltage between the positive end of the bus and the negative end of the bus increases, the clamping unit clamps the first switch device to a voltage of the first capacitor, and clamps the fourth switch device to a voltage of the second capacitor, and the buffering unit reduces a current flowing through the clamping unit and the flying capacitor.

Abstract: A power converter circuit included in a computer system may include multiple devices and a switch node coupled to a regulated power supply node via an inductor. During a first time period, the power converter charges a capacitor, and the couples the capacitor to the switch node during a second time period. During a third time period the power converter couples the switch node to an input power supply node. To maintain constant charge delivered to the load during each time the switch node is coupled to the input power supply node, the duration of the third time period is adjusted based on a voltage level of the input power supply node, a voltage level of the regulated power supply node, a value of the inductor, and the durations of first and second time periods.

Abstract: A sub-circuit of a voltage regulator includes a load condition detection circuit and a controllable circuit. The load condition detection circuit is arranged to detect a load transient frequency of a load powered by the voltage regulator, and generate a control signal according to a detection result of the load transient frequency. The controllable circuit is arranged to receive the control signal, wherein an operational behavior of the controllable circuit dynamically changes in response to the control signal.

Abstract: A circuit for parameter PSRR measurement includes a filter, a first regulator and a second regulator. The filter may be configured for receiving an AC input signal and a DC input signal, and for outputting a combined output signal according to the AC input signal and the DC input signal. The first regulator may be configured for receiving the combined output signal, and for outputting a first output signal having a first AC component signal and a first DC component signal. The second regulator may be configured for receiving the first output signal, and for outputting a second output signal having a second AC component signal and a second DC component signal. A parameter PSRR of the second regulator may be obtained according to a ratio between the second AC component signal and the first AC component signal.

Abstract: A low-dropout regulator including a first comparator, an edge trigger, a second comparator, a third comparator, and an output stage circuit is provided. The first comparator generates a first comparison signal according to a first reference signal and an output signal. The edge trigger outputs a trigger signal according to the first comparison signal, a second comparison signal, and a third comparison signal. The second comparator generates the second comparison signal according to the output signal and a second reference signal. The third comparator generates the third comparison signal according to the output signal and a third reference signal. The output stage circuit outputs the output signal according to the first comparison signal, the second comparison signal, and the third comparison signal. The output stage circuit includes a plurality of hysteresis controllers and a plurality of power transistors. Each hysteresis controller controls a conduction state of a corresponding power transistor.

Abstract: A high-side driver circuit is a circuit that drives a power semiconductor switch. The high-side driver circuit comprises a main switch N-channel MOSFET that has a drain terminal that is connected to a plus-side Vdc of a power supply and has a source terminal that is connected to an OUT terminal for a signal that drives the power semiconductor switch, a charge storage circuit that stores charge from the Vdc, and a voltage detection-capable switch that detects the voltage difference between an output terminal of the charge storage circuit and the Vdc and, upon detecting that the output terminal voltage of the charge storage circuit is at least a specific voltage higher than the voltage of a plus-side Vcc of the power supply, applies part or all of the output voltage of the charge storage circuit to a gate terminal of the main switch N-channel MOSFET.

Abstract: In a power supply device, a voltage controller includes: a reference voltage circuit that generates a reference voltage based on an input voltage; a voltage control circuit that generates an output voltage of the voltage controller based on the input voltage by controlling an output current of the voltage controller so that the output voltage of the voltage controller corresponds to the reference voltage; and a first current detector circuit that detects the output current of the voltage controller, and generates a first current detection signal corresponding to the output current thereof. A current controller includes: a second current detector circuit that detects an output current of the current controller, and generates a second current detection signal corresponding to the output current thereof; and a current control circuit controls the output current of the current controller so that the second current detection signal corresponds to the first current detection signal.

Abstract: A switching converter circuit comprises a converting circuit stage, an error amplifier, and a control circuit. The converting circuit stage includes a magnetic circuit element and a switching circuit configured to convert an input voltage to a regulated output voltage by charging and discharging the magnetic circuit element using activation pulses generated using a system clock signal. The error amplifier generates a control voltage using the output voltage. The control circuit varies time between successive activation pulses according to the control voltage, and the successive activation pulses are synchronized to the system clock signal.

Abstract: A hybrid energy storage system for an elevator car includes a converter disposed on the elevator car and receives power from a power source and provides a first DC voltage to a first DC bus and a second DC voltage to a second DC bus, a first energy storage device connected to the converter receives the first DC voltage on the first DC bus, and a second energy storage device connected to the converter receives the second DC voltage on the second DC bus. The system also includes a first load connected to the first DC bus and a second DC bus, and a second load connected to the second DC bus. Power is provided from the first energy storage device to the first load under a first selected condition and power is supplied from the second energy storage device to the first load under second selected condition.

Abstract: Provided is an electrical connection box 10 that includes a box main body 12 having a surface 14 provided with a component mounting portion 22 in which an electrical component 30 is mounted; and a cover member 16 covering the surface 14 of the box main body 12, in which an inner surface 48 of a top wall portion 42 of the cover member 16 is provided with a heat dissipation member holding portion 52 that protrudes toward the electrical component 30, and a plastic heat dissipation member 64 held by the heat dissipation member holding portion 52 is made to come into contact with a surface 66 of the electrical component 30.

Abstract: Embodiments disclosed herein relate to a low-voltage dropout regulator and more specifically to improving a power supply rejection ratio (PSRR) of the low dropout voltage regulator. The low dropout voltage regulator may be used to generate various voltages for integrated circuits of an electronic device. In some cases, a P-type metal-oxide-semiconductor (PMOS) low dropout (LDO) voltage regulator may be used. However, the PMOS LDO may not provide a sufficient PSRR or reduction in supply noise. To address these issues, an N-type metal-oxide-semiconductor (NMOS) LDO voltage regulator having an NMOS pass transistor may be used. The NMOS LDO may provide a lower impedance than the PMOS LDO. Further, the NMOS LDO may provide an increased bandwidth and consume a smaller physical area than the PMOS LDO.

Abstract: A system for optimizing dead time of switches, for example in power converters, using software. The system is first calibrated. The system determines the state that switches should be in. If the switch state needs to be changed, the system determines an optimized dead time which needs to be waited between turning one switch off and a complimentary switch on. The system controls the switches to turn on or off switches and waiting only the duration of the optimized dead time.

Abstract: A switched mode power supply includes a multilevel buck power converter and a control circuit. The power converter includes a first buck circuit and a second buck circuit each having a power switch, a rectifier, and an inductor. The power supply may further include a resonant power converter coupled to the multilevel buck power converter. In some examples, the control circuit is configured to generate control signals for the first buck circuit's power switch and the second buck circuit's power switch to control the power converter, and adjust a switching frequency of the control signals to control the amount of reverse current flowing in the first buck circuit and the second buck circuit to achieve zero voltage switching of the first buck circuit's power switch and the second buck circuit's power switch. Other example multilevel buck power converters and power supplies are also disclosed.

Abstract: A DC voltage conversion circuit includes: a switching circuit having a plurality of switching elements; and a controller that controls operations of the plurality of switching elements. The DC voltage conversion circuit can suppress variations in an output voltage even when an input voltage fluctuates. The controller can execute asymmetric PWM control and phase shift control, performs the phase shift control when a duty ratio is lower than a predetermined ratio, and performs the asymmetric PWM control when the duty ratio is higher than or equal to the predetermined ratio. When switching between the phase shift control and the asymmetric PWM control is performed with the step-down ratios being made to match each other, a control range of the duty ratio can be increased.

Abstract: A switched capacitor converter includes plural switch units. The switch units are configured to switch a coupling relationship of a capacitor between a first power and a second power, wherein at least one of the switch units includes a switch circuit. The switch circuit includes a first switch, a second switch, and a switch driving circuit, wherein the conduction resistance of the first switch is greater than the conduction resistance of the second switch, and the parasitic capacitance of the first switch is less than the parasitic capacitance of the second switch. The switch driving circuit turns on the first switch before the second switch is turned on and/or turns off the first switch after the second switch is turned off, such that the switching loss of the switch circuit is less than a predetermined target value.

Abstract: A power conversion circuit includes a first end of a first switch element coupled to an input power supply; a second end of the first switch element coupled to a first end of a first energy storage element, and a first end of a second switch element; a second end of the first energy storage element coupled to ground through a third switch element, and a first end of a fourth switch element; a second end of the second switch element coupled and connected to a battery; a first end of a second energy storage element coupled to two ends of the first energy storage element through a fifth switch element and a sixth switch element; a second end of the second energy storage element coupled to the battery; and a second end of the fourth switch element coupled to the battery.

Abstract: Systems and methods for improving power efficiency of electronic systems are disclosed. An intelligent voltage regulator module (VRM) can self-regulate the output power provided to one or more components of an electronic system. For example, output voltage to a component can be increased when more computational power is needed or lowered when appropriate. The intelligent VRM can regulate the output power, for instance, based on one or more of usage or activity of the component. In some cases, the intelligent VRM can independently regulate the output power without input from a host device or override one or more output power parameters. Adjustment of the output power can be performed using machine learning (ML).

Abstract: Voltage converter systems and methods are described. One aspect includes extracting energy from one or more data lines. A feedback voltage is derived from the extracted energy. Responsive to the value of the feedback voltage being less than a reference voltage value, a waveform modulation controller is switched to a pulse-frequency modulation (PFM) mode. Subsequent to switching the waveform modulation controller to the PFM mode, additional energy is extracted from the one or more digital data lines. Another feedback voltage is derived from the additional extracted energy. Responsive to the value of other feedback voltage being greater than the reference voltage value, the waveform modulation controller is further switched from the PFM mode to a pulse-skipping modulation (PSM) mode.

Abstract: A direct-current (DC)-DC converter includes a converting circuit including an inductor element. The converting circuit is configured to generate an output voltage from an input voltage based on a switching operation. An inductor current emulator is configured to adjust at least one parameter for changing a current peak value of the inductor element in response to a change in a level of the input voltage and is configured to generate an internal voltage based on the at least one parameter, which is adjusted. The inductor current emulator is configured to generate a control signal for controlling the switching operation such that current of the inductor element has a pattern corresponding to a pattern of the internal voltage.

Abstract: A current sense circuit includes a sense amplifier, a current mirror circuit, a resistor, a low-pass filter, and a capacitor. The sense amplifier is adapted to be coupled to a switching transistor of a DC-DC converter. The current mirror circuit is coupled to the sense amplifier, and is configured to generate a sense current proportional to a current flowing through the switching transistor. The resistor is coupled to the current mirror circuit, and is configured to generate a sense voltage based on the sense current. The low-pass filter is coupled to the resistor, and is configured to average the sense voltage over an averaging interval. The capacitor is coupled to the resistor, and is configured to store the sense voltage in a blanking interval that precedes the averaging interval, and provide a compensation current in the averaging interval.

Abstract: A power converter includes a switch control circuit for driving a high side switch of the power converter comprising the high side switch and a low side switch connected in series. The switch control circuit may have a first terminal for receiving a low side switch driving signal of the low side switch, a second terminal used as a reference ground terminal of the switch control circuit, and a third terminal used as an output terminal to provide a high side switch driving signal, the switch control circuit can draw power from the low side switch driving signal and may not require internal regulators that should sustain high voltage.

Abstract: In a power converter having a regulator and charge pump, both of which operate in plural modes, a controller receives information indicative of the power converter's operation and, based at least in part on said information, causes transitions between regulator modes and transitions between charge-pump modes.