Abstract: A voltage generation circuit and a semiconductor memory device capable of decreasing the layout size and the consumed current are provided. A voltage generation circuit includes a plurality of voltage generation units which generate different output voltages based on an external power supply voltage. Each of the plurality of voltage generation unit comprises a plurality of resistors that are connected in series to detect the output voltages. At least one of these resistors is coupled to and shared by the plurality of voltage generation units.

Abstract: A voltage regulator circuit is provided. The voltage regulator circuit includes a voltage regulator configured to provide an output voltage at an output terminal. A plurality of macros are connectable at a plurality of connection nodes of a connector connected to the output terminal of the voltage regulator. A feedback circuit having a plurality of feedback loops is connectable to the plurality of connection nodes. The feedback loop of the plurality of feedback loops, when connected to a connection node of the plurality of connection nodes, is configured to provide an instantaneous voltage of the connection node as a feedback to the voltage regulator. The voltage regulator is configured, in response to the instantaneous voltage, regulate the output voltage to maintain the instantaneous voltage of the connection node approximately equal to a reference voltage.

Abstract: The invention firstly relates to a receiver unit (200), configured to interact for wireless energy transfer with a transmitter unit (100) separate from the receiving unit, said transmitter unit (100) comprising a primary coil (L1) that can be supplied with a supply voltage (UV), wherein the receiver unit (200) comprises a secondary coil (L2) to which a DC link capacitor (CZ) and an energy storage unit (220) are connected by a power converter (210). According to the invention, the receiver unit (200) contains a device (240) for actuating the power converter (210) when a voltage is applied on the DC link capacitor (CZ) for supplying an alternating current (I) flowing through the secondary coil (L2) by actuating the power converter (210) to generate an energy pulse (EP).

Abstract: A fast-switching power management circuit is provided. The fast-switching power management circuit is configured to generate an output voltage(s) based on an output voltage target that may change on a per-frame or per-symbol basis. In embodiments disclosed herein, the fast-switching power management circuit can be configured to adapt (increase or decrease) the output voltage(s) within a very short switching interval (e.g., less than one microsecond). As a result, when the fast-switching power management circuit is employed in a wireless communication apparatus to supply the output voltage(s) to a power amplifier circuit(s), the fast-switching power management circuit can quickly adapt the output voltage(s) to help improve operating efficiency and linearity of the power amplifier circuit(s).

Abstract: A circuit includes: a first load circuit and a second load circuit coupled in parallel between a first node and a reference voltage node, where the first load circuit and the second load circuit are configured to receive a first input signal and a second input signal, respectively; a first pass device and a first switch coupled in series between a voltage supply node and the first node; a second pass device and a second switch coupled in series between the voltage supply node and the first node; and an amplifier, where a first input terminal and a second input terminal of the amplifier are configured to be coupled to a reference input voltage and the first node, respectively, where an output terminal of the amplifier is coupled to a first control terminal of the first pass device and a second control terminal of the second pass device.

Abstract: A multi-output AC/DC adapter can include a main power stage that receives power from an AC power source and delivers an intermediate output voltage, a plurality of regulator stages each comprising a chopper circuit that receives the intermediate output voltage and produces a regulated output DC voltage for one of the multiple outputs, and a controller. The main power stage can be a flyback converter, and the intermediate output voltage can be derived from a secondary winding of a flyback transformer of the flyback converter. The controller can provide a voltage reference signal and a feedback signal to the feedback loop of the main power stage, and the feedback signal can be an output voltage of one of the regulator stages. The controller can also provide a voltage reference signal to the controller of each of the regulator stages.

Abstract: A voltage regulator and a semiconductor memory device having the same are disclosed. The voltage regulator includes an amplifier configured to amplify a difference between a reference voltage and a feedback voltage to generate an amplifier output voltage, a voltage feedback unit connected between an output supply voltage generation node and a ground voltage and configured to generate the feedback voltage, a first transfer gate unit connected between an input supply voltage and the voltage generation node and driven in response to the amplifier output voltage to provide first current, a current load replica unit connected between the voltage generation node and the ground voltage and configured to consume the first current, and a transfer unit connected between the input supply voltage and the voltage generation node and driven in response to the amplifier output voltage when the current load unit performs an operation, to provide second current.

Abstract: Various embodiments may provide non-isolated single-input dual-output (SIDO) bi-directional buck-boost direct current (DC) to DC (DC-DC) converters. Various embodiments may provide a method for controlling a buck duty cycle of the non-isolated SIDO bi-directional buck-boost DC-DC converter such that a first voltage measured across a first portion of the non-isolated SIDO bi-directional buck-boost DC-DC converter is maintained at less than a voltage of a first load and a second voltage measured across a second portion of the non-isolated SIDO bi-directional buck-boost DC-DC converter is maintained at less than a voltage of a second load.

Abstract: An apparatus includes hardware circuits, a front-end power supply, voltage regulators, and control circuitry. The front-end power supply generates electrical power for the hardware circuits. The front-end power supply includes power stages that generate portions of electrical power and are activated and deactivated independently. The voltage regulators are connected to an output of the front-end power supply and provide adjustable operating voltages to the hardware circuits.

Abstract: A first terminal receives a first DC voltage. A switch selectively couples the first terminal to a second terminal providing an output. A control circuit selectively actuates the switch in response to a comparison of the first DC voltage to a second DC voltage. A low-dropout (LDO) linear voltage regulator, connected between the first and third terminals, operates to provide the second DC voltage from the first DC voltage.

Abstract: A voltage regulation system is provided. In the voltage regulation system, a frequency of a clock signal is adjusted and a pulse generator is controlled to output a pulse signal to a switch power stage circuit, to enable the switch power stage circuit to adjust an output voltage and output the adjusted output voltage to the load element. Through the aforementioned configuration, the switch power stage circuit adjusts the output voltage according to the situation of the load element, thus decreasing the power loss of the switch power stage circuit.

Abstract: A method of wirelessly transmitting power includes: causing a power transmission circuit to transmit, to a master power reception circuit, a portion of power it is capable of transmitting; adjusting operation of a slave power reception unit until a first rectified voltage produced by the master power reception circuit and a second rectified voltage produced by the slave power reception unit are equal; causing the power transmission circuit to transmit additional power to the slave power reception unit, resulting in the first and second rectified voltages being unequal; and adjusting operation of the slave power reception unit until the first and second rectified voltages are again equal. A dummy load is connected to the slave power reception unit prior to causing the power transmission circuit to transmit the additional power, and is disconnected once the first and second rectified voltages are equal.

Abstract: This disclosure describes systems, methods, and apparatus for driving a plurality of output circuits from a DC input signal using a resonant converter, the resonant converter comprising a switch network, a resonant tank, and a rectifier network, the resonant tank comprising: a resonant capacitor bridge coupled across the switch network; a plurality of branches, each branch comprising at least one series inductor coupled at a first end to the resonant capacitor bridge and at a second end to the rectifier network; and at least one parallel inductor; the rectifier network comprising one or more groups of transformers, each group coupled to one branch of the plurality of branches, and wherein the primary windings of the transformers of each group are coupled in parallel, and wherein the secondary windings are configured for coupling to an output load.

Abstract: A voltage regulator circuit is provided. The voltage regulator circuit includes a voltage regulator configured to provide an output voltage at an output terminal. A plurality of macros are connectable at a plurality of connection nodes of a connector connected to the output terminal of the voltage regulator. A feedback circuit having a plurality of feedback loops is connectable to the plurality of connection nodes. The feedback loop of the plurality of feedback loops, when connected to a connection node of the plurality of connection nodes, is configured to provide an instantaneous voltage of the connection node as a feedback to the voltage regulator. The voltage regulator is configured, in response to the instantaneous voltage, regulate the output voltage to maintain the instantaneous voltage of the connection node approximately equal to a reference voltage.

Abstract: Systems and methods that may be implemented to automatically sense and verify proper mated orientation of a removable BGA package relative to a mating pad array (e.g., of a BGA socket) prior to supplying power to the BGA package. A removable BGA package may be provided with first and second symmetric pins so as to present different respective circuit states on opposing sides of a center point of its BGA package pin array, such that proper orientation of the BGA package occurs only when a designated one of the first and second symmetric pins is mated with a designated pad of the mating pad array. A programmable integrated circuit may in turn sense the circuit state presented at the designated pad to verify proper orientation of the mated BGA package based on the sensed circuit state presented at the designated pad, and may take one or more designated actions based on whether or not proper orientation of the mated BGA package is verified.

Abstract: A power stage in a multi-phase switching power supply incorporates a current sense transistor coupled in series with the output inductor to sense the phase current for the power stage. In some embodiments, the current sense transistor mirrors the output voltage disconnect transistor (the ORing FET) used to switchably connect a power stage to the output voltage node. The current sense transistor measures a portion of the inductor current flowing through the output inductor where the inductor current is indicative of the phase current of the power stage. Accurate current sensing is implemented for the power stage where the current sense value dose not require temperature compensation.

Abstract: A power converter is disclosed. The power converter includes a Single-Input-Multiple-Output (SIMO) device includes a first transistor connected to an input and a first end of an inductor, a second transistor connected to a second end of the inductor and a first output, and a third transistor connected to the second end of the inductor and a second output. The power converter also includes a controller connected to the SIMO device and is configured to maintain a minimum inductor current through the inductor between charging cycles and to cause the minimum inductor current to transition to a charging inductor current during a charging cycle. The charging inductor current is based on a difference between an output voltage signal and a target voltage signal.

Abstract: A switching regulator circuit to convert an inputted first voltage to a second voltage by turning on and off a switching device and to output the second voltage to a load includes: a load current determination unit configured to determine a level of a load current passing the load connected to the switching regulator circuit; a switching frequency setting unit configured to set a switching frequency for the switching device according to a result of determination by the load current determination unit; and a switching control unit configured to turn on and off the switching device at the switching frequency set by the switching frequency setting unit.

Abstract: A single input dual output buck-boost power conversion system includes a voltage source input for connecting a voltage source for power conversion. A plurality of switches electrically connect to the voltage source input, wherein each switch is connected to a controller configured for pulse width modulation (PWM) control of the switches. A first voltage output is configured to connect to a first load to power the first load with converted power from the voltage source input. A second voltage output is configured to connect to a second load to power the second load with converted power from the voltage source input, wherein the controller is configured to provide positive voltage or negative voltage to each of the first and second voltage outputs, as needed for any of four combinations of polarity among the first and second voltage outputs including positive-positive, positive-negative, negative-positive, and negative-negative.

Abstract: An electric power system is provided that includes a three-phase to ten-phase step-up transformer. The transformer includes primary winding groupings, secondary windings, and third windings. The primary winding groupings include sub windings. Primary winding groupings are coupled to form a delta configuration and coupled to secondary windings and third windings, which may also be coupled to each other. The outputs at second ends of secondary windings and third windings are greater than the outputs at the second ends of primary windings. Diode pairs are connected to each other, each diode pair having an inner connection connected to one of the outputs of the transformer and first and second ends respectively connected to a positive dc bus and a negative dc bus. An inverter is connected to the d busses. The diode pairs operatively rectify the transformer output voltage to form a DC voltage with a reduced common mode voltage.

Abstract: The disclosure provides a system of providing power to a chip on a mainboard. The system comprises at least one preceding-stage power supply module located on a surface of a mainboard, being DC-DC converters, and configured to receive a first DC voltage and to provide a second DC voltage; and at least one post-stage power supply module located on the same surface of the preceding-stage power supply module of the mainboard. Wherein the post-stage power supply module is electrically connected to the preceding-stage power supply module to receive the second DC voltage, the preceding-stage power supply module and the post-stage power supply module are disposed at same side of the chip, the post-stage power supply module provides a third DC voltage to the chip. A profile projection of the preceding-stage power supply module and the corresponding post-stage power supply module are overlapped with each other over 50%.

Abstract: A circuit is disclosed. The circuit includes a current detecting FET, configured to generate a current signal indicative of the value of the current flowing therethrough, an operational transconductance amplifier (OTA) configured to output a current in response to the voltage of the current signal, and a resistor configured to receive the current and to generate a voltage in response to the received current, where the generated voltage is indicative of the value of the current flowing through the current detecting FET. The current detecting FET is configured to become nonconductive in response to the generated voltage indicating that the current flowing through the current detecting FET is greater than a threshold.

Abstract: A single-inductor, multiple-output, DC-DC converter has regulation circuitry that controls switches to alternately charge at least two capacitors associated with at least two DC output voltages via the single inductor from a DC input port. The regulation circuitry determines whether the DC-DC converter is operating in continuous conduction mode (CCM) or discontinuous conduction mode (DCM). In CCM mode, the regulation circuitry regulates the charging duty cycle for a first output voltage and generates the initial charging duty cycle for regulating each other output voltage by scaling the first output voltage duty cycle. In DCM mode, the regulation circuitry independently regulates the charging duty cycles for each output voltage and stores each duty cycle to be used for the next charging period for the same output voltage. The regulation circuitry detects and handles undershoot and overshoot conditions to accelerate recovery at the output ports.

Abstract: A system including multiple power supplies is provided. Each of the power supplies is configured to provide a standby power to a management unit in the system through a standby output and a main power through a main output, when an input power signal has been received for the system. The system also includes a resistor configured to receive a standby signal from each of the power supplies to raise a signal voltage, wherein the standby signal is a pre-selected current. The system also includes a controller in each of the power supplies, the controller configured to raise the signal voltage to the specified value when the signal voltage is greater than a threshold, and to enable the standby power from a respective power supply to reach the management unit when the signal voltage is within the specified value. A method to use the above system for a synchronized power supply to a management unit is also provided.

Abstract: The present disclosure relates to voltage regulator circuitry comprising an input for receiving a supply voltage, an output for outputting an output voltage, and control circuitry configured to receive a reference voltage. The voltage regulator circuitry is selectively operable in either a closed-loop mode in which the control circuitry receives a voltage indicative of the output voltage such that the voltage regulator circuitry regulates the output voltage based on the voltage indicative of the output voltage and the reference voltage received by the control circuitry or an open-loop mode in which the control circuitry does not receive the voltage indicative of the output voltage and the voltage regulator circuitry regulates the output voltage based on the reference voltage received by the control circuitry.

Abstract: A multi-port power converter including a housing including a plurality of ports structured to electrically interface to a plurality of loads, the plurality of loads having distinct electrical characteristics; a plurality of solid-state components configured to provide selected electrical power outputs and to accept selected electrical power inputs; a plurality of solid-state switches configured to provide selected connectivity between the plurality of solid-state components and the plurality of ports; and a controller, the controller including: a component bank configuration circuit structured to interpret a port electrical interface description during a run-time operation of the multi-port power converter, the port electrical interface description comprising a description of at least a portion of the distinct electrical characteristics; and a component bank implementation circuit structured to provide solid switch states in response to the port electrical interface description, and wherein the plurality of s

Abstract: An analog front-end (AFE) circuit for conditioning a sensor signal is disclosed. The AFE circuit includes a first stage configured to amplify and filter the sensor signal. The first stage comprises a biquadratic filter comprising a first plurality of DC-coupled transconductance amplifiers. The AFE further includes a second stage configured to further amplify and filter the amplified sensor signal, and to compensate a direct current (DC) offset of the first stage. The second stage comprises a second plurality of AC-coupled transconductance amplifiers. Each transconductance amplifier of the first plurality and of the second plurality has a programmable transconductance and comprises a plurality of subthreshold-biased transistors.

Abstract: A circuit arrangement for a high-voltage test system has an electronic power converter unit for generating an excitation AC voltage. The AC voltage has an adjustable fundamental frequency and a frequency spectrum. The amplitudes in the frequency spectrum within a given frequency range are lower than a predefinable amplitude limit.

Abstract: A gray-scale voltage generating circuit includes: a ladder resistor circuit including a plurality of resistors connected in series to one another, and configured to output a plurality of gray-scale voltages with different voltage values from ends of the respective resistors; and a constant current source configured to be connected in series to the ladder resistor circuit, in which the constant current source includes a current source transistor configured to be connected in series to the ladder resistor circuit, and a voltage setting section configured to select one voltage from the plurality of voltages and set the selected voltage as a voltage determining a current that is to flow through the current source transistor.

Abstract: An apparatus is disclosed for a single-inductor multiple-output (SIMO) power converter with a cross-regulation switch. An example apparatus includes a power source and a SIMO power converter. The SIMO power converter includes an input node coupled to the power source, a first node, a second node, a ground node, and an inductor coupled between the first node and the second node. The single-inductor multiple-output power converter also includes a first switch coupled between the input node and the first node, a second switch coupled between the first node and the ground node, and a cross-regulation switch coupled between the input node and the second node.

Abstract: An integrated driving module includes an oscillator, a PWM unit, a soft start controller, a first driver, and a second driver. The oscillator is connected to a voltage input end and generates an oscillating signal. The PWM unit receives the oscillating signal and generates a first driving control signal and a second driving control signal that are respectively anti-phased. The first driver outputs a first driving output signal to a first output end according to the first driving control signal. The second driver outputs the second driving output signal to a second output end according to the second driving control signal. The integrated driving module only has four connection ends for external connection to provide the two anti-phase driving output signals, such that the circuit design and connection of the primary side of the transformer is greatly simplified. The design limitation and manufacturing cost can be both lowered.

Abstract: The present invention is directed to data communication. More specifically, embodiments of the present invention provide a transceiver that processes an incoming data stream and generates a recovered clock signal based on the incoming data stream. The transceiver includes a voltage gain amplifier that also performs equalization and provides a driving signal to track and hold circuits that hold the incoming data stream, which is stored by shift and holder buffer circuits. Analog to digital conversion is then performed on the buffer data by a plurality of ADC circuits. Various DSP functions are then performed over the converted data. The converted data are then encoded and transmitted in a PAM format. There are other embodiments as well.

Abstract: A backlight driver includes current sources that are connected between LED strings and a number of bias voltages. There can be any number of different bias voltages, each at a ground potential or higher voltage. The bias voltage is selected for a particular LED string in order to reduce a current drop across the current source. This reduces the power consumption of the current source and LED string. Heat dissipation is also reduced.

Abstract: A current detecting GaN FET is disclosed. The current detecting GaN FET includes a first GaN switch having a first gate, a first drain, a first source, and a first field plate. The current detecting GaN FET also includes a second GaN switch having a second gate, a second drain, a second source, and a second field plate. The current detecting GaN FET also includes a resistor. The first and second gates are electrically connected, the first and second drains are electrically connected, and the resistor is connected between the first and second sources.

Abstract: In accordance with embodiments of the present disclosure, an apparatus may include a signal path comprising a closed-loop analog pulse width modulator having a forward signal path and a feedback path, a variable resistor coupled to an output of the closed-loop analog pulse width modulator, and a control circuit configured to modify the variable resistor in order to modify an output impedance outside of the feedback path of the closed-loop analog pulse width modulator responsive to a condition for switching between a high output impedance mode and a low output impedance mode of the closed-loop analog pulse width modulator or vice versa.

Abstract: A wireless power supply system may comprise a wireless power transmitting circuit configured to transmit radio-frequency (RF) signals, and a wireless power receiving circuit configured to convert power from the RF signals into a direct-current (DC) output voltage stored in an energy storage element. The wireless power transmitting circuit may be electrically or magnetically coupled to an antenna and/or electrical wiring of a building for transmitting the RF signals. The wireless power transmitting circuit may be housed in an enclosure that is affixed in a relative location with respect to the wireless power receiving circuit. The antenna may comprise two antenna wires that extend from the enclosure. The wireless power receiving circuit may be electrically or magnetically coupled to an antenna for receiving the RF signals. The wireless power receiving circuit may comprise an RF-to-DC converter circuit for converting the power from the RF signals into a DC output voltage.

Abstract: A power converter includes a voltage source for generating an input voltage, and a regulation circuit for generating a set of output voltages based on the input voltage. The regulation circuit regulates the set of output voltages in different manners based on whether the set of output voltages is greater or less than a set of corresponding reference voltages, respectively. If one or more output voltages are less than one or more of the corresponding reference voltages, the regulation circuit regulates only those one or more output voltages during a current regulation interval based on an error voltage related to one or more differences between the one or more output voltages and the corresponding one or more reference voltages, respectively. If all output voltages are greater than the corresponding reference voltages, the regulation circuit regulates only the output voltage associated with the largest load current during the current regulation interval.

Abstract: A power combining technique includes receiving a first voltage at a first input and a second voltage at a second input. The power combining technique further includes combining, with at least two power converters, power received from the first and second inputs into a single power rail. A power balancing technique further includes controlling the at least two power converters such that a first one of the power converters outputs an amount of current to the single power rail that is proportional to and/or equal to the amount of current output by another of the power converters.

Abstract: A circuit comprising a first driver having an input, an output and a power input, and a first regulator having an input, an output coupled to the first driver, and an adjustment control configured to control a voltage of the first regulator. A second driver having an input, an output and a power input, and a second regulator having an input, an output coupled to the second driver, and an adjustment control configured to control a voltage of the second regulator. A first impedance coupled to the adjustment control of the first regulator and configured to selectably increase or decrease the voltage of the first regulator.

Abstract: An input power conditioning circuit (PCC) for a switched-mode power converter includes a hybrid full wave rectifier. Hybrid rectification is provided by a main rectifier and a matched virtual junction (VJ) rectifier, both with four-transistor gate fully cross-coupled. The VJ rectifier includes a voltage divider (such as a resistive voltage divider) to generate a virtual junction reference voltage VJ_ref (which can be less than transistor Vth). A power conversion controller (such as a boost controller) includes circuitry (such as an error amplifier) to regulate the input voltage VIN (main rectifier) to be substantially equal to VJ_ref from the VJ rectifier. Hybrid rectification, with VIN regulation, can be used to eliminate reverse (flow back) current, improving power conversion efficiency.

Abstract: An apparatus includes a first amplifier, a second amplifier, and a compensation-setting generator to generate a first amplifier compensation setting and second amplifier compensation setting. A controller is operable to: i) apply the first amplifier compensation setting to the first amplifier and apply the second amplifier compensation setting to the second amplifier. The controller is further operable to switch between generating updates to the first amplifier compensation setting and the second amplifier compensation setting.

Abstract: A smart power supply system is provided. An input end connecting to a power supply provides power to a control module, so that the control module can receive an application voltage range from an electronic product, and then control a power module according to the application voltage range to make an output voltage value of an output end increased gradually according to the application voltage range from low to high. In the process that the output voltage value of the output end is increased gradually, the control module detects an input voltage value and an input current value and the output voltage value to calculate and store an input power correspondingly, and then control the power module according to the output voltage value, which corresponds to the minimum input power of the stored input powers to make the output voltage value of the output end be an optimum voltage value.

Abstract: An apparatus, method, and system for actively controlling power in a series string load is provided. A number of conventional low-cost power supply units energize a number of voltage-regulation modules (VRMs) connected to each other in series. Each VRM generates a regulated output voltage using a pulse-wave modulated switching circuit, and provides the regulated output voltage to a number of load elements. Each VRM also sends signals to a central controller describing the output voltage applied to its connected load elements, and adjusts the output voltage applied to its connected load elements in response to signals received from the central controller. The supply voltage provided to individual load elements may thus be accurately and dynamically controlled during operation. Each load element may comprise a light-emitting device, a microprocessor, or a cryptographic integrated circuit with a plurality of processing cores. Optocouplers or load-shifters send signals across different supply voltage domains.

Abstract: Method and apparatus are disclosed for controlling a vehicle power supply using serial communication. An example vehicle power system includes a host controller configured to supply a slave controller with a first voltage. The vehicle power system also includes the slave controller. The slave controller is configured to determine a received voltage, determine a difference between the received voltage and a nominal operating voltage, and transmit the difference to the host controller. The host controller is then configured to modify the first voltage based on the difference.

Abstract: The overall performance of single input multiple output (SIMO) switching DC-DC power converters may be improved by controlling power and output switches to adjust inductor current delivered to one output while maintaining substantially constant the current delivered to other outputs, thereby reducing cross regulation interference across outputs. Power converter systems of this disclosure may be configured to calculate an inductor current value and a duty cycle value based on voltages at each of the voltage outputs. The power converter systems may be configured to control at least one main power switch to increase or decrease the current in the inductor based on the calculated inductor current value. Additionally, the power converter systems may be configured to control at least one output power switch to divert current from the inductor to one of the plurality of output nodes based on the calculated duty cycle value.

Abstract: A DC-DC converter system (1, 1?) according to the invention is provided with an input (In) for feeding in an input voltage (U_in), a step-up controller section (2) for increasing the input voltage (U_in) in a controlled manner to a controlled first output voltage (U_out1) and for providing the first output voltage (U_out1) at a first supply output (Out1), and a voltage conversion section (3) for converting the input voltage (U_in) into a second output voltage (U_out2) in a manner controlled by a control device of the step-up controller section (2) and for providing the second output voltage (U_out2) at a second supply output (Out2). The DC-DC converter system (1) according to the invention having two supply outputs (Out1, Out2) is based on an expansion of a step-up controller with a SEPIC circuit, wherein the DC-DC converter system comprises only a single control device (S1) and a switching device (T1) which can be controlled by the control device.

Abstract: In an example, a dual-phase inverting buck-boost power converter for use with at least first and second energy storage elements includes an inverting buck-boost power converter and an inverting boost converter. In an example, the inverting buck-boost power converter is coupled between an input node and an output node of the dual-phase inverting buck-boost power converter and includes a first plurality of switches operable to couple to the first energy storage element, wherein the inverting buck-boost power converter is operable to supply a first load current. In an example, the inverting boost converter is coupled in parallel with the inverting buck-boost power converter between the input node and the output node of the dual-phase inverting buck-boost power converter and includes a second plurality of switches operable to couple to the first and the second energy storage elements, wherein the inverting boost converter is operable to supply a second load current.

Abstract: In a DC/DC converter, when stepping up voltage from an input unit to an output unit or when stepping down voltage from the output unit to the input unit, a second driver IC outputs to a charge pump circuit a control signal for controlling a switching element so as to alternately repeat ON/OFF when a switching element is ON and a switching element is OFF. When stepping up voltage from the output unit to the input unit or when stepping down voltage from the input unit to the output unit, a first driver IC outputs to the charge pump circuit a control signal for controlling the switching element so as to alternately repeat ON/OFF when a switching element is ON and the switching element is OFF. As a result, the DC/DC converter can drive the charge pump circuit without providing an oscillation circuit.

Abstract: A contactless card is powered by an antenna connected to the input of a rectifier. An output of the rectifier is coupled to a processing unit that consumes a first current output from the rectifier. A current regulation circuit is connected to the output of the rectifier. The current regulation circuit operates to absorb a second current from the output of the rectifier such that a sum of the first and second currents is a constant current.

Abstract: A power supply device includes an input terminal, a regulated voltage output terminal, a switch, a first transistor, and a current split circuit. The input terminal receives a first control voltage. The regulated voltage output terminal outputs an output voltage. The switch has a first terminal coupled to the input terminal, a second terminal, and a control terminal. The first transistor has a first terminal coupled to a voltage terminal, a second terminal coupled to the regulated voltage output terminal, and a control terminal coupled to the second terminal of the switch. The current split circuit is coupled to the voltage terminal and the regulated voltage output terminal. The current split circuit receives the first control voltage or a second control voltage, and includes a second transistor coupled between the voltage terminal and the regulated voltage output terminal.