Abstract: A signal processor includes an AD converter that converts a periodic analog signal output from a detector in accordance with a position Q of a motor to a digital signal at a predetermined conversion period, a tracking circuit that calculates a position P of the motor at an arithmetic period on the basis of the digital signal that is converted and output at the conversion period by the AD converter, an operation state identifier that identifies an operation state of the motor on the basis of the position P of the motor calculated by the tracking circuit, and an arithmetic period determiner that changes the arithmetic period of the tracking circuit in accordance with the operation state of the motor identified by the operation state identifier such that the position P of the motor calculated by the tracking circuit follows the actual position Q of the motor.

Abstract: A motor control apparatus that controls the rotational angle of a motor (111) which drives a rotating body (112) includes a synchronizing means (200) for generating and outputting an interrupt signal (700) based on an external reference signal (600) input from outside and a rotating body reference signal (500) generated by the rotating body, and a controlling means (300) for computing a command value for making the rotational angle of the motor follow a target rotational angle and outputting the command value to the motor each time the interrupt signal is inputted. The synchronizing means (200) changes the output period of the interrupt signal (700) in accordance with a time difference between the external reference signal (600) and the rotating body reference signal (500).

Abstract: A method for starting a permanent magnet single-phase synchronous electric motor which includes a permanent magnet rotor and a stator with windings, and which is connected to an electrical grid by a switch. The method includes: a first starting attempt in which the windings are fed in current with first starting impulses generated only during the half-periods of a first polarity of the voltage of the electrical grid; a first control step which detects whether a starting condition has been obtained in the first starting attempt; and, if the first control step does not detect that the starting condition has been obtained within the term of the first starting attempt, a second starting attempt in which the windings are fed in current with second starting impulses generated only during the half-periods of a second polarity that is opposite to the first polarity of the voltage of the electrical grid.

Abstract: A motor drive apparatus receiving power from a power source and driving a motor with independent polyphase systems of excitation coils, comprises: a control circuit and power converters each corresponding to one system, each including an inverter circuit, an interrupter circuit, and a temperature detector, the inverter circuits being connected in series to the power source and, while not short-circuited, supplying power to the excitation coil, wherein the control circuit detects an operating state of the motor, short-circuits the inverter circuits and interrupts the interrupter circuits for a subset of power converters defined according to the operating state, such that a source voltage is supplied to non-short-circuited inverter circuits, and, when a power converter exceeds a predetermined temperature, the control circuit short-circuits the inverter circuit and interrupts the interrupter circuit thereof, and, in another power converter not exceeding the predetermined temperature, operates the inverter circui

Abstract: A tube-structured battery to be inserted into a living body is provided. The tube-structured battery includes: a biofuel battery part which generates electric energy by using biofuel in the blood passing through an internal space of the tube structure; a transformer circuit part which adjusts a voltage or current density by using the generated electric energy; and a secondary battery part which is charged with the electric energy by using the adjusted voltage or current density to store the electric energy, wherein the tube-structured battery is inserted into the living body or a blood vessel of the living body.

Abstract: A vehicle power system includes a battery having a plurality of cells and at least one controller. The at least one controller causes the cells to acquire charge for a period of time such that at the expiration of the period of time, voltages of some of the cells are approximately equal to a specified voltage, amp·hours stored by other of the cells are approximately equal, and an amount of energy stored by the battery is at least equal to a predetermined target energy amount.

Abstract: A collection, charging and distribution machine collects, charges and distributes portable electrical energy storage devices (e.g., batteries, super- or ultracapacitors). To charge, the machine employs electrical current from an external source, such as the electrical grid or an electrical service of an installation location. The machine determines a first number of devices to be rapidly charged, employing charge from a second number of devices identified to sacrifice charge. Thus, some devices may be concurrently charged via current from the electrical service and current from other devices, to achieve rapid charging of some subset of devices. The devices that sacrifice charge may later be charged. Such may ensure availability of devices for end users.

Abstract: A network of collection, charging and distribution machines collect, charge and distribute portable electrical energy storage devices (e.g., batteries, supercapacitors or ultracapacitors). To charge, the machines employ electrical current from an external source, such as the electrical grid or an electrical service of an installation location. The charging and distribution machines may distribute portable electrical energy storage devices of particular performance characteristics and other attributes based on customer preferences and/or customer profiles. The charging and distribution machines may provide instructions to or otherwise program portable electrical energy storage devices stored within the charging and distribution machines to perform at various levels according to user preferences and user profiles.

Abstract: A network of collection, charging and distribution machines collect, charge and distribute portable electrical energy storage devices (e.g., batteries, supercapacitors or ultracapacitors). To charge, the machines employ electrical current from an external source, such as the electrical grid or an electrical service of an installation location. By default, each portable electrical energy storage device is disabled from accepting a charge unless it receives authentication information from an authorized collection, charging and distribution machine, other authorized charging device, or other authorized device that transmits the authentication credentials. Also, by default, each portable electrical energy storage device is disabled from releasing energy unless it receives authentication information from an external device to which it will provide power, such as a vehicle or other authorization device.

Abstract: A charging circuit for a battery includes an input terminal configured for providing a charging voltage, a switching unit connected between the input terminal and the battery, and a protection unit. The protection unit is configured for detecting a voltage of the battery and determining whether the voltage of the battery less than a predetermined voltage and controlling the switching unit to activate or terminate charging of the battery.

Abstract: In one aspect of the present invention, a battery charging system has a first rectifier adapted for converting an AC voltage at an input thereof to a first DC voltage at an output thereof; a power factor correction (PFC) circuit coupled to the first rectifier, for correcting the power factor of the battery charging system and outputting a second DC voltage; a first power converter coupled to the PFC circuit, for converting the second DC voltage to a third DC voltage; a second power converter coupled to the first power converter, for converting the third DC voltage to a fourth DC voltage to be delivered to a battery; and a first controller adapted for sensing the fourth DC voltage at the output of the second power converter for regulating the second power converter to maintain the fourth DC voltage at a predetermined value.

Abstract: A pulse modulation charging method is provided for charging a rechargeable battery device. In the method, a current pulse is provided according to a charge-discharge cycle, the rechargeable battery device is charged repeatedly with a charge current pulse width, and the rechargeable battery device is discharged with a discharge current pulse width. In addition, in the method one or more voltage threshold values are further designated. When a terminal voltage of the rechargeable battery device is greater than the voltage threshold value, the charge current pulse width is gradually reduced, so as to improve charge efficiency for charging the rechargeable battery device. A pulse modulation charging apparatus is further provided, which is used for charging the rechargeable battery device according to the steps described here.

Abstract: A charger device includes a switch, a voltage converter, a constant current circuit, and an automatic disconnecting circuit. The switch is connected to an alternating current (AC) power supply which triggers the charger device to work. The automatic disconnecting circuit is connected to the battery, the voltage converter and the constant current circuit automatically disconnect the voltage converter from the AC power supply when the battery is fully charged. The automatic disconnecting circuit comprises a first resistor, a voltage follower, a second resistor, a first zener diode, a variable resistor, a comparator, a third resistor, a first switch element, a diode and a relay. The relay comprises a coil and a normally-open switch connected between the AC power supply and voltage converter. The normally-open switch turns on or turns off to control a connection between the charger device and the AC power supply.

Abstract: A power supply for a downhole instrument is provided. The power supply includes high temperature rechargeable energy storage, power generation capabilities and provides for operation in high temperature environments. A method of fabrication and use are provided.

Abstract: According to one embodiment, a storage system includes storage devices configured to execute communication by using an identifier, a converter configured to convert the identifier of the storage devices, a controller configured to execute communication with the storage devices via the converter by using the identifier converted by the converter, convert a DC power output from the storage devices into a DC power of a predetermined magnitude and output the DC power, and charge the storage devices with the DC power of the predetermined magnitude, an AC/DC converter configured to convert the DC power output from the controller into an AC power, convert an AC power supplied from a distribution system into a DC power and supply the DC power to the controller, and a controller configured to control the controller and the AC/DC converter.

Abstract: Notification of a charging trend of a secondary cell is achieved with a simpler configuration. A solar cell charges a secondary cell. A CPU detects voltage values of the secondary cell at a predetermined cycle and determines increase and decrease of the charged amount of the secondary cell on the basis of the result of comparison of the voltage values detected a plurality of number of times. The CPU also displays information indicating increase and decrease of the determined charged amount of the secondary cell on a display unit.

Abstract: A dual mode wireless power module for a device includes a wireless transceiver and a wireless power transceiver circuit. The wireless transceiver circuit is operable to communicate peripheral power information indicating a wireless power configuration. The wireless power transceiver circuit is operable to determine, based upon the power information, a power status of another device identified by the peripheral power information. When the power status of the another device is favorable, the wireless power transceiver circuit is placed in a wireless power receive mode in which the wireless power transceiver circuit converts wireless power into a voltage. When the power status of the another device is unfavorable, the wireless power transceiver circuit is placed in a wireless power transmit mode in which the wireless power transceiver circuit converts a power source of the device into the wireless power.

Abstract: A battery charging device, method and system are disclosed for wirelessly charging a battery. A transmitter can transmit an RF wireless power signal to a battery charging device, and a receiver within the battery charging device can receive the RF wireless power signal. The battery charging device can thereafter transfer the received RF wireless power signal to a battery receiving portion to charge the battery. In an embodiment, the RF wireless power signal is transferred at a frequency of about 13.56 MHz to overcome wave shadowing. A battery recharging feedback control circuit can optionally be applied in combination with the battery charging device and can monitor a power quantity of the RF wireless power signal.

Abstract: The battery pack includes a rechargeable battery cell, an energized coil, a temperature detector, a switch, a controller, power supply terminals, and a temperature terminal. The coil can be electromagnetically connected to an energizing coil of a charger. The detector detects the cell temperature. The switch is serially connected to the detector. The controller controls ON/OFF of the switch. The pack can be electrically connected through the terminals to a battery-driven device. The cell can be charged/discharged through the power supply terminals. The temperature terminal is connected to the detector. The controller is connected to the temperature terminal. When the pack is charged by the charger in the non-contact charging manner, the switch is turned OFF so that the pack can communicate with the device through the temperature terminal.

Abstract: The battery pack has a contactless charging circuit 95 that rectifies power received by a receiving coil 1, and a battery pack control section 91 with a connection decision section. The battery pack control section 91 is configured to judge whether or not the battery pack is connected to the body of a battery powered device 101 based on the rectified voltage of the contactless charging circuit 95. This decision utilizes the fact that the charging circuit is in a no-load condition and the rectified voltage is high when the battery pack is not connected to the battery powered device, and allows reliable judgment of whether the battery pack 90 is alone or attached to the battery powered device.

Abstract: A method of delivering power from a power supply to an electric vehicle is described herein. The method includes receiving a request to deliver power from the power supply to the electric vehicle. A first monitoring signal indicative of a combustible gas is transmitted from a sensor to a controller. The controller determines whether electrical power is to be delivered, from a charging device to the electric vehicle, based at least in part on the received first monitoring signal.

Abstract: Various examples provide a system and method including receiving a plurality of electrical vehicle charge requests, receiving a plurality of additional electric load power requests, and controlling charging of the electrical vehicles in association with the plurality of electrical vehicle charge power requests. Various examples include modulating the charging of one or more of the electrical vehicles to maintain total power consumed by the electrical vehicles and a plurality of additional electric loads below a threshold power consumption rate.

Abstract: An improved charging stand for electric or hybrid vehicles is based upon a two-piece construction. Different top sections may be used, including a plain top with a rounded end or a decorative top which may include an optional ambient light fixture. A single fastener may be placed through the top section and into the pipe to hold the entire assembly together. An upright pipe has a cutout to receive a recharge controller with a recharge cable, the pipe further including a slot to receive the cable. A first plastic sleeve has a height below the cutout in the pipe corresponding the bottom of the slot. The recharge controller is accessible through the cutout with the cable protruding through the slot. A second plastic sleeve with a closed top and an open bottom mates with top of the first plastic sleeve with a cutout corresponding to the cutout in the pipe.

Abstract: Disclosed is a vehicle charging device that can perform communication even if the vehicle charging device and a charging instruction device are connected to power line pairs having different phases in a multiple-wire power line. The vehicle charging device (6) is provided with: a power line communication unit (61) that performs communication over a multiple-wire power line or a power line (7) for vehicles; a power line connection unit (63) that connects a pair of power lines within the multiple-wire power line to the power line (7) for vehicles; and a control unit (62) that controls the connection or the disconnection of the power line connection unit (63). The power line communication unit (61) selects a signal from a pair of power lines within the multiple-wire power line and communicates with the charging instruction device, and performs communication with the vehicle over the power line (7) for vehicles.

Abstract: A vehicle battery and charging method that may be used to balance cell voltages during a battery charging operation, and may do so in a way that protects the individual cells from over-charging and improves the overall efficiency of the operation. According to one example, the vehicle battery includes a number of cell-balancing current paths, each of which is connected in parallel to an individual battery cell and can shunt or bypass the corresponding cell when its voltage exceeds some maximum amount. This may enable under-charged battery cells to be charged at the same time that over-charged battery cells are bypassed. Each of the cell-balancing current paths may include a series-connected electronic switch and zener diode combination, where the electronic switch is controlled by a battery control module so that cell-balancing can be enabled during a battery charging operation and disabled at other times.

Abstract: A charge system for series connected rechargeable batteries includes: a power generating unit generating a DC input power based on a voltage input from an AC power source; a charge control unit generating a charge voltage based at least the DC input power from the power generating unit and supplying the charge voltage to the rechargeable batteries through an interface unit; and multiple detecting units each detecting a voltage of a corresponding rechargeable battery through the interface unit, generating a feedback power based on the voltage of the corresponding rechargeable battery upon detecting that the voltage of the corresponding rechargeable battery is within a predetermined voltage range, and outputting the feedback power to the charge control unit such that the charge voltage is generated by the charge control unit further based on the feedback power from any one of the detecting units.

Abstract: A power supply system includes a first charge storage. A series circuit with a plurality of n charge storage modules is connected between load terminals. A second charge storage includes load terminals. A charge transfer arrangement includes at least one charge transfer unit coupled between one of the charge storage modules and the load terminals of the second charge storage. The charge transfer arrangement is configured to transfer upon request electrical charge from the one charge storage module to the second charge storage.

Abstract: A power supplying system includes multiple rechargeable battery devices each including a first switch module, a series connection of a battery unit which includes multiple rechargeable batteries connected in series with each other and a second switch module connected in parallel to the first switch module, and a control module for controlling operations of the first and second switch modules. For each rechargeable battery device, the first and second switch modules are normally operated in an OFF-state and an ON-state, respectively, and the control module enables the first and second switch modules to switch respectively from the OFF-state and the ON-state to an ON-state and an OFF-state upon detecting that a voltage of any one of the rechargeable batteries of the battery unit is not within a predetermined voltage range during charging or discharging of the battery unit.

Abstract: A cell management system and method for balancing energy across a plurality of cells coupled to a circuit bus. The system can include a transformer, two transformer switches, and for each cell, a first switch pair allowing transfer of energy between the transformer and the cell, and a second switch pair allowing removal or inclusion of the cell in the serial connection of cells. The system can include an energy storage device, a switch pair allowing transfer of energy between the transformer and the storage device, and for each cell, a third switch pair allowing transfer of energy between the storage device and the cell. The system can include cell, bus and storage device sensors and state estimators. The system can include a controller that controls the transformer switches, cell switches, and storage device switches based on the sensor readings and states.

Abstract: According to one embodiment, a battery cell monitoring circuit detects an abnormity in the cell balancing and terminals of each battery cell. One end of the first switch is connected to the first cell balancing terminal, and the other end of the first switch is connected to the second cell balancing terminal, so that the first switch is turned on/off based on a first control signal to perform cell balancing. The current source and the second switch are arranged in parallel with the first switch, and are connected in series between the one end and the other end of the first switch. The current source supplies a current. The second switch is turned on/off based on a second control signal. The first detection unit receives a first cell voltage measuring terminal voltage and a first cell balancing terminal voltage, and detects a terminal open state. The second detection unit receives a second cell voltage measuring terminal voltage and a second cell balancing terminal voltage, and detects a terminal open state.

Abstract: Provided are a battery protection IC and a battery device, which are capable of ensuring safety even when a charger is connected in a reverse direction. The battery protection IC includes a first switch element provided between an overcurrent detection terminal and a VDD terminal so that, when the charger is connected with reverse polarity, the first switch element interrupts a current path between the overcurrent detection terminal and the VDD terminal. The battery protection IC further includes a second switch element provided between a charge control terminal and the VDD terminal so that, when the charger is connected with reverse polarity, the second switch element interrupts a current path between the charge control terminal and the VDD terminal.

Abstract: A charge/discharge control method for an alkaline storage battery (11) includes: obtaining in advance a coefficient (K) representing characteristics of a memory effect of the alkaline storage battery; causing the alkaline storage battery to perform a charge/discharge between a lower-limit depth-of-charge (SOCb), of which a depth-of-charge is set within a range of 10% to 30%, and an upper-limit depth-of-charge (S), of which a depth-of-charge is set within a range of 70% to 90%; calculating an additional charge electricity quantity (C) based on the coefficient (K), the upper-limit depth-of-charge (S), and a predetermined reference time (T); measuring a charging/discharging time during which the alkaline storage battery performs the charge/discharge; and performing a charge of the alkaline storage battery with the calculated additional charge electricity quantity added to the upper-limit depth-of-charge, each time when the measured charging/discharging time reaches the reference time.

Abstract: In a battery pack, an overcharge detecting circuit compares a voltage between a positive electrode and a negative electrode of a secondary battery with a threshold voltage to detect an overcharge of the secondary battery, and turns off a switching element. A series circuit including a thermistor and a resistor is arranged near the secondary battery and connected in parallel to the secondary battery. A comparator compares a voltage at a junction point of the thermistor and the resistor with a reference voltage corresponding to a predetermined temperature. In response to an output signal of the comparator, a changing unit changes the threshold voltage to a first value when a temperature of the secondary battery is below the predetermined temperature, and changes the threshold voltage to a second smaller value when the temperature of the secondary battery is above the predetermined temperature.

Abstract: A method for recharging an electric vehicle having an electric battery for powering a vehicle drive system is provided. The method includes recharging the electric vehicle during a first period at a first electrical power and recharging the electric vehicle during a second period shorter than the first period at a second electrical power higher than the first electrical power. The recharging includes delivering coolant to the electric vehicle to cool the electric battery during the second period. Other methods of recharging an electric vehicle are also provided.

Abstract: A battery device including a case, an elastic component, a metal coil, a magnetic component, at least one energy storage component and a rectifier voltage regulator circuit is provided. The case includes a first and a second electrode ends, and both the elastic component and the metal coil are disposed in the case. The magnetic component is disposed in a receiving space of the coil and connects to an end of the elastic element, and the energy storage component connects to the first and the second electrode ends in parallel. When the battery device moves back and forth along a direction, the elastic component extends or retracts to drive the magnetic component to move back and forth relative to the metal coil along this direction. Thereby, an electric energy is induced in the metal coil, and is then stored in the energy storage component after being rectified and voltage-regulated.

Abstract: A method of controlling an electromechanical transducer includes (a) observing the strength of a physical quantity being characteristic for the harmonic operational behavior, (b) providing an observation signal being indicative for the observed strength of the physical quantity, (c) comparing the provided observation signal with a reference signal for the strength of the harmonic operational behavior, (d) determining a harmonic control signal in response to the observation signal and in further response to the reference signal, (e) generating a modified drive signal based on the determined harmonic control signal, and (f) supplying the generated modified drive signal to electromagnetic coils of a stator of the electromechanical transducer. Further, a control system and a computer program which are adapted for carrying out and/or for controlling the method are provided.

Abstract: A method for controlling the operation of an electromechanical transducer is provided. The method includes (a) determining during a first period of time a first strength of the harmonic operational behavior of the transducer, (b) determining during a second period of time a second strength of the harmonic operational behavior of the transducer, wherein the second period of time is different from the first period of time, (c) calculating a harmonic control signal in response to both the determined first strength of the harmonic operational behavior and the determined second strength of the harmonic operational behavior, (d) generating a modified drive signal based on the calculated harmonic control signal, and (f) supplying the generated modified drive signal to electromagnetic coils of a stator of the transducer. Further, a corresponding control system for controlling the operation of an electromechanical transducer is provided.

Abstract: One embodiment of the present invention is a unique method of controlling the output of a synchronous electrical machine. Another embodiment is a unique method of controlling the output of a synchronous electrical machine for powering a load. Still another embodiment is a unique aircraft power generation system. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for fluid driven actuation systems. Further embodiments, forms, features, aspects, benefits, and advantages of the present application will become apparent from the description and figures provided herewith.

Abstract: Provided is a doubly-fed induction generator system and a self-test method for the active crowbar circuit of the doubly-fed induction generator system. The invention is featured by using the controller of the doubly-fed induction generator system to carry out a self-test procedure to detect the loop current of the active crowbar circuit for determining if the active crowbar circuit can be turned on and off normally. Also, the rotor-side converter and the active crowbar circuit of the doubly-fed induction generator system are forbidden to turn on simultaneously during the execution of the self-test procedure.

Abstract: A power detection regulation device including a power detection signal generator, a power state detector and a regulated output unit is disclosed. The power detection signal generator receives the input power from an external power supply and generates a power detection signal. The power state detector generates a power state signal based on the power state derived from the power detection signal. The regulated output unit receives the power state signal and generates a driving signal to an external electrical device in accordance with the feedback signal from the external electrical device. The power state signal is provided for the external electrical element to perform relevant processes, and the regulated output device can output the predetermined driving signal on receiving the power state signal indicating some abnormal situation in the input power so as to maintain the normal operation performed by the actuating element in the external electrical device.

Abstract: The invention relates to a system for eliminating current surges that includes a first voltage regulator (7) having a current limit programmable to a value (I(limit)) that depends on the value of the intermittent current surges (IO(surge)) required by the intermittent load (3) and the relationship thereof to the work cycle, a second voltage regulator (9), a condenser (4) connected between the first and second regulators (7, 9), that loads when the current is no longer required and that unloads when there is a need for output current to provide current to the second regulator (9) which absorbs the changes in voltage produced by the loading/unloading of the condenser and provides a constant voltage for any value of the required output current surge, independently of voltage changes in the condenser (4), and a control loop between a sensor for the output current provided to the load and an input limit (15) for the input current (II) in the first regulator (7).

Abstract: A boost power converter system according to one embodiment includes an input voltage high-side node; an inductor coupled to the input voltage high-side node at a first terminal of the inductor; a power switch coupled to the inductor at a second terminal of the inductor; a drive circuit configured to control the power switch such that the boost power converter system operates in a discontinuous conduction mode when a load current drops below a critical conduction threshold; and a damping switch configured to enable current flow from the power switch at the second terminal of the inductor to the input voltage high-side node, wherein the damping switch is closed when the power switch is open and the damping switch is opened when the power switch is closed.

Abstract: An amplifier is disclosed. In accordance with some embodiments of the present disclosure, an amplifier may comprise a differential pair comprising a first transistor and a second transistor, wherein the first transistor comprises a first portion and a second portion, a first compensation circuit comprising a first terminal coupled to the first portion of the first transistor and a second terminal coupled to the second transistor, and a second compensation circuit comprising a first terminal coupled to the second portion of the first transistor and a second terminal coupled to the second transistor and the second terminal of the first compensation circuit.

Abstract: The present relates to a start-up circuit, which is used for starting up a variable power supply circuit, which comprises a detection circuit and a transition circuit. The detection circuit is used for detecting an output voltage of the variable power supply and producing a detection signal. The transition circuit is coupled to the detection circuit. It transits the level of the detection signal and produces a control signal for starting up or cutting off the variable power supply. Thereby, the problem of incapability in transition can be avoided as well as achieving the purpose of low power consumption.

Abstract: A switching regulator includes a multiphase converter which includes a plurality of main phases configured to covert a power supply voltage to a lower voltage for application to an electronic device at different load conditions. The switching regulator also includes an auxiliary phase configured to operate in a pulse frequency modulation mode during a light load condition so that power is supplied to the electronic device by at least the auxiliary phase during the light load condition.

Abstract: A voltage regulator includes a current bridge and first and second current paths coupling a current mirror to respective first and second voltage-to-current converters. The current mirror controls a second current dependent on a first current. The first voltage-to-current converter controls the first current dependent on either a reference voltage or a feedback voltage derived from the regulator's output voltage, and the second voltage-to-current converter controls the second current dependent on the other of the feedback and reference voltages. Voltage-to-current conversion by the first converter is independent of voltage-to-current conversion by the second converter. An output transistor stage coupled to the second current path controls the output voltage dependent on the voltage in the second current path indicative of a deviation of the second current from a target current value dependent on the reference voltage.

Abstract: A power supplying circuit for generating an output voltage, which comprises: a noise detecting circuit, for receiving a first reference voltage and for generating a second reference voltage according to the output voltage and the first reference voltage, wherein a noise component of the second reference voltage is the same as which of the output voltage; a control voltage generating unit, for receiving a feedback voltage and the second reference voltage, and for generating a control voltage according to the feedback voltage and the second reference voltage; a voltage providing device, for generating the output voltage according to the control voltage and an input voltage; and a feedback module, for generating the feedback voltage according to the output voltage.

Abstract: A DC-DC converter is provided. When a load of the DC-DC converter is too light, the DC-DC converter can raise a frequency of its PWM signal, and reduce a pulse width of the PWM signal, so as to avoid the frequency of the PWM signal falling into a frequency range that can heard by human's ear and maintain high conversion efficiency of the DC-DC converter.

Abstract: The present invention relates to an error voltage generation circuit, a switch control circuit, and a power factor corrector. The error voltage generation circuit generates an error voltage using an error input voltage corresponding to an output voltage of a power factor corrector and a soft start voltage. The error voltage generation circuit samples an error input voltage at an AC input supply time point of the power factor corrector and holes a sampling voltage according to the sampled error input voltage during a soft start period. The error voltage generation circuit generates a soft start voltage increasing from a start voltage corresponding to the sampling voltage. The switch control circuit controls a duty of a power switch of the power factor corrector using the error voltage.

Abstract: An example controller for a power supply includes a drive signal generator and a compensation circuit. The drive signal generator is to be coupled to control switching of a switch included in the power supply to regulate an output voltage of the power supply in response to a sensed output voltage such that the output voltage of the power supply is greater than an input voltage of the power supply. The compensation circuit is coupled to the drive signal generator and is also coupled to output an offset current to adjust the sensed output voltage in response to the input voltage of the power supply.