Abstract: Embodiments of the invention relate to a method and apparatus for plasma actuated high performance flow control. A specific embodiment of a plasma actuator can incorporate a power source; a first electrode in contact with a first dielectric layer and connected to the power source; a second electrode in contact with a second dielectric layer and connected to the power source; and a ground electrode. The power source drives the first electrode with a first ac voltage pattern with respect to the ground electrode and drives the second electrode with a second ac voltage pattern with respect to the ground electrode such that application of the first voltage pattern produces a first plasma discharge in a flow region, and a first electric field pattern in the flow region, and application of the second voltage pattern produces a second plasma discharge in the flow region and a second electric field pattern in the flow region.

Abstract: A luminaire can comprise an electronic circuit, such as an LED driver or electronic ballast. A surge protection device in the current path between a power supply and the luminaire components can be configured to protect the electronic circuitry by absorbing and/or redirecting energy of a surge by switching into a low-impedance state while maintaining the protected circuitry (including its internal protective components, if any) in a high-impedance state. The surge protection device can comprise a MOV stage and a filter stage, for example. The surge protection device can be configured as a replaceable module, with the luminaire including an assembly designed to receive the module and allow for easy replacement over the useful life of the other components. Use of fuses or thermal components may cause the surge protection device to interrupt power flow if protection is lost due to internal failure, indicating when module replacement is needed.

Abstract: A dimmer switch for controlling the amount of power delivered to and thus the intensity of a lighting load comprises a visual display operable to provide a visual indication representative of energy savings and usage information. The visual display may comprise a single visual indicator or a linear array of visual indicators. The visual display is illuminated in a first manner when the intensity of the lighting load is less than or equal to a predetermined eco-level intensity, and is illuminated in a second manner when the intensity of the lighting load is greater than the eco-level intensity. For example, the single visual indicator may be illuminated a first color, such as green, when the intensity of the lighting load is less than or equal to the eco-level intensity, and illuminated a second different color, such as red, when the intensity of the lighting load is greater than the eco-level intensity.

Abstract: Apparatus and methods are provided for guarding against unintended exposure to light from a light-emitting device used to direct light to a subject for detection by a light detector. A sensor signal indicative of light detected by the light detector is sampled. An inhibition signal for inhibiting emission of light from the light-emitting device is generated, based at least in part on whether emitted light is expected from the light-emitting device and the comparison of the sampled sensor signal value to a threshold value. The light-emitting device may be monitored for continuous wave operation. A mechanical interlock may be provided having a guard moveable between closed and open positions respectively to cover and expose a port of the light-emitting device.

Abstract: A display device includes: a display panel; an optical detector which includes an optical sensor formed by a thin film transistor for detecting external light and a capacitor connected between a pair of electrodes of the optical sensor; a switch which turns on or off a charging operation of the capacitor; an optical sensor controller which controls the switch to be turned on or off and measures illumination of the external light on the basis of a time period during which the switch is turned off and a voltage of the capacitor becomes a value not more than a threshold value; and a controller which controls brightness of the display panel on the basis of an output of the optical sensor controller, wherein after the optical sensor controller detects a fact that the voltage of the capacitor becomes the value not more than the threshold value, the optical sensor controller turns on the switch after a predetermined time.

Abstract: A light emitting device is disclosed herein. An embodiment of the light emitting device comprises a first plurality of light emitters comprising a first group and a second group, wherein the first group is connectable in series to the second group. A first driver is connected to the first group. A second driver is connectable to the second group. A first voltage comparator is coupled to the first driver, wherein the voltage comparator compares the voltage of the first driver to a predetermined voltage. The light emitting device is in a first state when the voltage of the first driver is below the predetermined voltage. The light emitting device is in a second state when the voltage of the first driver is greater than the predetermined voltage. The light emitting device is in the first state, the first group is connected in series with the second group to form a series circuit between the first driver and a reference voltage.

Abstract: Lamp lighting device serves to light up a selected one of two high pressure mercury lamps, and includes a starting pulse generating circuit for outputting a starting pulse voltage; two step-up transformers having secondary windings connected to trigger windings of the lamps respectively; an inverter for outputting an alternating-current voltage; and relays each for providing the starting pulse voltage to a primary winding of a step-up transformer corresponding to the selected lamp, and each for providing the alternating-current voltage to main electrodes of the selected lamp. Since the step-up transformers are provided at stages coming after the relays as such, relays with low breakdown voltage can be used.

Abstract: A high pressure discharge lamp lighting apparatus includes a high pressure discharge lamp and a power supply apparatus, wherein in a steady state lighting operation, an alternating current of a steady state lighting frequency and alternating current of a low frequency are supplied by turns to the high pressure discharge lamp, and wherein in a small electric power lighting in which electric power to be applied is smaller than that of the steady state lighting, alternating current of a small electric power lighting frequency and direct current are supplied by turns to the high pressure discharge lamp.

Abstract: The present invention is directed to method, system and computer-readable media for controlling lighting devices. In some embodiments, a method for controlling pulse width modulated lighting devices within a lighting apparatus comprising a plurality of sets of lighting devices is disclosed. The method includes setting a counter for a first set of the plurality of sets of lighting devices using a master counter and an activation duration for one or more other sets of the plurality of sets of lighting devices. The method further includes determining an activation time period within a duty cycle for the first set of lighting devices using the counter for the first set of lighting devices and an activation duration for the first set of lighting devices. In some embodiments of the present invention, the lighting devices are light emitting diodes grouped into sets (or banks) and controlled to limit the magnitude and/or quantity of instantaneous current fluctuations in a power supply within the lighting apparatus.

Abstract: A method and a control apparatus for driving a lamp 14 in a lighting system, in particular a lamp having a fast response to a change of an amount of energy supplied through the lamp, in which a device controller 8 is connected with the lamp 14. The device controller 8 receives data values from a system controller 2 to change a light output level of the lamp 14. Upon receiving a data value which is different from a previously received data value the device controller calculates additional data values and distribute the additional data values in a following time interval to smoothen a transition between different light output levels of the lamp 14.

Abstract: Methods and apparatus for conveying information. One or more information signals representing scalar or numeric information that is not associated with color is/are received from a data base, a network, the World Wide Web, or a software program. The information signal(s) is/are converted into one or more illumination control signals representing at least color information, and a color of illumination generated by one or more LED-based light sources is controlled in response to the illumination control signal(s) so as to convey the scalar or numeric information via at least the color of the generated illumination.

Abstract: An optoelectronic device is provided and includes a substrate, a p-type cladding layer, an active layer and a conductive light extraction unit. The conductive light extraction unit includes an n- type cladding layer above the active layer, a metal layer above the n-type cladding layer and a plurality of holes passing through the metal layer and the n-type cladding layer. Sizes of the plurality of holes are not the same and/or the holes are arranged irregularly.

Abstract: An illuminating ribbon has a decoration ribbon and a flexible circuit board with light-emitting devices. The decoration ribbon has two long sides, in which one of the two long sides has a sewing line. The flexible circuit board with light-emitting devices is disposed on the decoration ribbon and fixed to one long side of the decoration ribbon via the sewing line. The flexible circuit board with light-emitting devices includes an insulator with flexible flat surface; first and second electrical wires; N light-emitting devices; and a power device. The first and second electrical wires are embedded in parallel into the insulator with flexible flat surface. The N light-emitting devices are connected to the first and second electrical wires. The power device is connected to the first and second electrical wires to supply power to the N light-emitting devices and thus to generate light on the decoration ribbon.

Abstract: A removable LED light assembly for use in a light fixture assembly includes an LED lighting element and one or more resilient members to maintain a compression force between the LED light assembly and a housing to provide effective heat transfer from the LED to the housing. The LED light assembly includes a plurality of electrical contact members to facilitate installation of the LED light assembly in the housing.

Abstract: A light source control method and a light source control device are used for controlling a light source. The light source control device includes a position detecting sensor and a microcontroller. The light source control method includes steps of generating a first signal according to an object touching a position of the position detecting sensor, and generating a control signal according to a light source adjustable parameter set corresponding to the first signal for controlling an illuminating status of the light source. The light source adjustable parameter set includes a plurality of color value components. The control signal is generated by the microcontroller according to the color value components.

Abstract: The present invention relates to an LED illumination module. The LED illumination module comprises an upper housing configured to have an accommodation unit upwardly protruding at a central portion of the upper housing and to have two or more LEDs mounted in an outer circumference direction of the accommodation unit, a lower housing disposed below the upper housing, a power supply device embedded in the accommodation unit formed in the upper housing and configured to supply a power source to the LEDs, and power source cables placed on sides of the upper housing and the lower housing and configured to supply an external power source to the power supply device.

Abstract: An illumination driving system includes a control unit and at least one base. The control unit includes a first converter and a brightness-adjustable circuit. An input AC voltage is converted into a regulated DC voltage by the first converter. The brightness-adjustable circuit is connected to the first converter. The base is separated from the control unit for supporting the at least one light-emitting device. The base includes a second converter. The second converter is connected with the first converter and the light-emitting device for converting the regulated DC voltage into an output voltage. The light-emitting device is driven to illuminate by the output voltage. The brightness-adjustable circuit generates a brightness adjusting signal to the first converter. The magnitude of the regulated DC voltage is adjusted according to the brightness adjusting signal, thereby adjusting the brightness value of at least one light-emitting device.

Abstract: A self-oscillating switch circuit is configured for use in a switching DC-DC converter (switched mode power supply (SMPS)). The self-oscillating switch circuit comprises an input terminal (Tin1, Tin2) for receiving power from a power supply (51) and an output terminal (Tont1, Tont2) for supplying power to a load. The load may be a high-power LED, for example. The self-oscillating switch circuit further comprises a power switch semi-> conductor device (Q1) having a control terminal and a control semi-conductor device (Q2) coupled to the power switch semi-conductor device. The power switch semi-conductor device is configured for controlling a load current between the input terminal and the output terminal and the control semi-conductor device is configured for supplying a control signal to the control terminal of the power switch semi-conductor device for controlling switching of the power switch semi-conductor device.

Abstract: A cluster control device, which is provided for controlling street lamps, includes a plurality of control modules and at least one master controller. The control modules are respectively connected to the street lamps that are included in a power supply circuit. Each control module functions to control the respective street lamp in accordance with control parameters stored in a memory. The master controller is set in communication with each of the control modules to read and write control parameters stored in the memory of each control module for controlling all the street lamps in a clustered manner.

Abstract: An image display apparatus includes a rear plate including electron-emitting devices, a face plate including an anode electrode for accelerating electrons from the electron-emitting devices, a plate-shaped spacer being disposed between the rear and face plates and including a conductive member formed in a longitudinal direction of the spacer, and a potential-supplying unit for forming a potential gradient in the conductive member in the longitudinal direction of the spacer to compensate a difference between a distance to the spacer from a position on the face plate irradiated with electrons emitted from a first electron-emitting device among the electron-emitting devices and that from a position on the face plate irradiated with electrons emitted from a second electron-emitting device among the electron-emitting devices, the second electron-emitting device being located at a position shifted in the longitudinal direction of the spacer with respect to a position of the first electron-emitting device.

Abstract: A solid state relay has independent charge pumps isolating each gate of a full bridge to achieve faster and proper gate turn on. The low side MOSFETs of the bridge are the current sensing device reducing loss and allowing a device controlled by the relay to achieve peak performance. Dynamic braking is achieved by the two low side MOSFETs being fully conducted and applying a load across the DC motor. Addition of a microprocessor to the device provides undervoltage sensing, current vs time readings, motor stall sensing, and motor temperature sensing. Motor temperature is detected by checking impedance of the motor at microsecond pulses to see if the motor is getting hot.

Abstract: An electrical full bridge circuit configuration having a bridge circuit, in the bridge branches of which electrical switch elements are situated, and having at least one bridge cross branch for connecting an electric motor that is switchable in its direction of rotation, in particular in an electrical system of a motor vehicle, and having a protective switch element for protecting against inadmissibly high electrical currents, in particular short circuit currents. For this purpose, the switch elements are provided as formed from switch contact elements of at least one relay.

Abstract: An actuating device for displacing a control device, such as a gate valve or other control mechanism, in particular for use in oil or gas production systems, includes a motor-gear unit and a threaded spindle drive, which is operable by said motor-gear unit. The threaded spindle drive includes at least a threaded spindle and a screw nut. The threaded spindle is displaceable in an essentially axial-direction so as to displace the control device between an advance position and a retracted position. The threaded spindle drive further includes a position holding means holding the attained position of the threaded spindle. The position holding means is directly connected to a motor shaft of the motor-gear unit so as to apply a holding torque to said motor shaft.

Abstract: An apparatus for use with a flight control actuator and method for assembling the same is provided. The apparatus includes a motor drive system and a control unit. The motor drive system includes a capacitor-based energy storage configured to store and provide energy within or proximate to the actuator. The control unit is coupled to the motor drive system and is configured to facilitate managing power within or proximate to the actuator.

Abstract: A phase current estimation device of a motor includes: an inverter which uses a pulse width modulation signal to sequentially commutate an electric flow to a motor of a three-phase alternating current; a pulse width modulation signal generation unit generating the pulse width modulation signal from a carrier signal; a control unit performing a startup control and a self control of the motor using the inverter; a direct current sensor detecting a direct current of the inverter; and a phase current estimation unit estimating a phase current based on the direct current detected by the direct current sensor.

Abstract: A controller calculates a total power fluctuation including a power fluctuation on a first unit and a power fluctuation on a second unit. The controller estimate a voltage fluctuation of the system voltage based on the total power fluctuation. Then, the controller calculates a control amount for a voltage converter by reflecting the estimated voltage fluctuation. The estimated voltage fluctuation can be used to correct a feed-forward control amount. As a result, a voltage stabilizing control is performed based on the estimated voltage fluctuation which could be occurred in response to the total power fluctuation if no stabilizing control is performed. Thereby, the stability of the system voltage can be improved without using a large size smoothing capacitor.

Abstract: A multi-processor controller is provided. The multi-processor controller can be used to control the operation of an inverter in a vehicle-based electric traction system. The multi-processor controller includes a first processor device having a first supply voltage node, a second processor device having a second supply voltage node, a first voltage regulator, and a second voltage regulator. The first voltage regulator has a first output voltage node coupled to the first supply voltage node, and the first voltage regulator is configured to generate a first regulated supply voltage for the first processor device. The second voltage regulator has a second output voltage node coupled to the second supply voltage node, and the second voltage regulator is configured to generate a second regulated supply voltage for the second processor device.

Abstract: A fan controlling circuit is provided. The fan controlling circuit includes an integral unit, an operational amplifier, a PMOS transistor, and an NMOS transistor. The integral unit transforms pulse width modulation (PWM) signals to voltages, and transmits the voltages to positive and negative input terminals of the operational amplifier. The PMOS transistor is coupled between a first PWM signal and an output terminal, and a gate of the PMOS transistor is coupled to an output of the operational amplifier. The NMOS transistor is coupled between a second PWM signal and the output terminal, and a gate of the NMOS transistor is coupled to the output of the operational amplifier. The fan controlling circuit may be formed by discrete elements and use a same voltage source as fans, so that the design cost and complexity are reduced.

Abstract: A motor driving circuit includes a three-phase inverter circuit 8, including three upper-arm switching elements 56a to 56c for driving upper arms of different phases of a three-phase motor 3, and three lower-arm switching elements 56d to 56f for driving lower arms of different phases. At least one of the upper-arm switching elements 56a to 56c and the lower-arm switching elements 56d to 56f is a semiconductor element that performs a diode operation. The diode operation is an operation in which a voltage less than or equal to a threshold voltage of a gate electrode G is applied to the gate electrode G with reference to a potential of a first ohmic electrode S, thereby conducting a current flow from the first ohmic electrode S to a second ohmic electrode D and blocking a current flow from the second ohmic electrode D to the first ohmic electrode S.

Abstract: A fan controlling circuit is provided. The fan controlling circuit includes an integral unit, an operational amplifier, and an output unit. The integral unit transforms pulse width modulation signals to voltages, and then the output unit outputs one of the pulse width modulation signals having a higher operation frequency according to the comparison result between the voltages. As the fan controlling circuit may be constituted with discrete elements and use a same voltage source as fans, the design cost and complexity are reduced.

Abstract: An electronic control module for a machine may include instructions for performing a method. The method may include obtaining a total torque load limit for one or more hydrostatic transmission loops in the machine. The method may also include allocating the total torque load limit between the one or more hydrostatic transmission loops in the form of one or more lower level torque load limits.

Abstract: A control loop circuit for use in a closed-loop control system that controls a system such as a linear motor is presented. The control loop circuit includes a lead-lag compensator that features a lead compensation network configured to reduce output noise without substantially changing the effect of the lead compensation in the control system's frequency response.

Abstract: An overmodulation PWM controller includes a voltage instruction calculation unit which calculates a d axis voltage instruction and a q axis voltage instruction in which a voltage amplitude exceeds a peak value of a triangular wave carrier; a voltage instruction correction unit which corrects the d axis voltage instruction and the q axis voltage instruction so that a pulse width modulation voltage applied to an AC motor has a fundamental wave amplitude corresponding to the voltage instruction amplitude, according to the synchronization value K which is the number of the triangular carriers per one cycle of the phase voltage instruction; and a voltage instruction conversion unit which converts the corrected d axis voltage instruction and the q axis voltage instruction into a phase voltage instruction. The pulse width modulation voltage is controlled according to the result of comparison between the phase voltage instruction and the triangular wave carrier.

Abstract: A solar cell charging device includes a base shown as a shell shape, a light-converging lens arranged at a top face of the base, a solar collector correspondingly located under the light-converging lens and a photoelectric converting unit. A plurality of charging troughs arranged on the base are recessed inwardly from circumferential faces thereof. The photoelectric converting unit is connected between each charging trough and the solar collector, converting the light energy absorbed by the solar collector into electric energy provided to be input into each charging trough, after the light-converging lens focuses the solar energy onto the solar collector.

Abstract: Charging circuit for charging two batteries with a mains transformer having a primary and a secondary winding, both end terminals of the secondary winding are connected with respective capacitive circuits, wherein terminals of identical polarity of the respective capacitive circuits are connected to the end terminals of the secondary winding and each of the capacitive circuits comprises at least one electrolytic capacitor of high capacitance value and a diode connected in reverse direction, and at least the other terminal of one of the capacitive circuits is connected with a common point of two diodes connected in series with each other, and the two remaining free electrodes of the two diodes (D1, D2) are coupled to at least two of the altogether four terminals of the two batteries (B1, B2), and the second terminal of the other capacitive circuit with opposite polarity is connected directly or through a further diode (D5) to the fourth battery terminal.

Abstract: A charging system for a portable electronic device is disclosed. The system comprises a charging station providing a magnetic field for power distribution by an alternating current source connected to a power transmission coil for providing the magnetic field, and the portable electronic device.

Abstract: Exemplary embodiments are directed to wireless power transfer. A portable wireless power charger includes an antenna configured to generate a magnetic near-field for coupling of wireless power to a wireless powered device including a receiver. The antenna is substantially disposed around the perimeter of the charging pad. The portable wireless power charger further includes a feeder cable for coupling the input power to the charging pad.

Abstract: A specimen supporting and labeling system including the provision of at least one electronic device. A volume defining bin holds a plurality of specimens and supports the electronic device. A pedestal charging base seats within a recessed underside associated with the bin, with a first plurality of contact locations communicated along an upper face of the charging base. A second plurality of contact locations communicates along a bottom face of the bin associated with the recessed underside. The bin further incorporates an interior architecture extending from the second contact locations and communicates a charge originating from the base to the electronic device.

Abstract: Disclosed herein are a method of controlling the operation of battery modules in a battery system, which includes two or more battery modules or battery module assemblies, wherein the battery system further includes energy consuming loads for consuming charged energy, and the method includes, when a specific battery module or a specific battery module assembly is abnormally operated, connecting the abnormally operated battery module or the abnormally operated battery module assembly to the corresponding energy consuming load to forcibly discharge the charged energy, and a battery system that is capable of performing the battery system control method.

Abstract: The battery system is provided with a battery 1 that can be recharged, a fuse 8 connected to the battery 1 that blows with excessive current flow, relays 2 connected to the output-side of the battery 1, and a current cut-off circuit 4 that detects excessive battery 1 current and controls the relays 2. The current cut-off circuit 4 detects excessive battery 1 current, and is provided with a timer section 24 that designates a time delay until the relays 2 are switched from ON to OFF. For the delay time of the timer section 24, the fusing current of the fuse 8 is set lower than the maximum cut-off current of the relays 2 and higher than the maximum allowable battery 1 charging and discharging current. In a situation where excessive current greater than the maximum cut-off current of the relays 2 flows through the battery 1, the fuse 8 is blown during the timer 24 delay time, and the current cut-off circuit 4 switches the relays 2 from ON to OFF when the delay time has elapsed.

Abstract: The present disclosure is concerned with operation of an energy storage system (ESS) connectable to an electric power system. The charging-discharging schedule of the ESS can be determined through application of a time-dependent forecast of ESS and power system states based on historical data. Exemplary embodiments can include ESSs which have been historically activated with a certain periodicity, for example, for power system load leveling, frequency regulation, arbitrage, peak load shaving and/or integration of renewable power generation.

Abstract: A charger is operable in a normal mode such that output power matches a provided electric power command value CHPW, and limits the output power to a limit value PS in a saving mode if the electric power command value CHPW exceeds the limit value PS. A charging ECU performs feedback-control for compensating for the electric power command value CHPW such that a charging power monitor value PM sensed by a charging power sensing unit matches a target value PR, and in addition, limits an increase in the electric power command value CHPW such that the electric power command value CHPW does not significantly deviate from the target value PR. As a result, in a vehicle charging system on which an add-on charger having a power saving function is mounted, stabilization of the behavior when the add-on charger returns from a saving operation to a normal operation is allowed.

Abstract: A battery charger circuit includes a transistor having a first current electrode for receiving a charging voltage, a control electrode for receiving a control signal, and a second current electrode for providing an output voltage. The battery charger circuit further includes a rectifier having a terminal coupled to the second current electrode of the transistor, and another terminal coupled to a power supply voltage terminal. The battery charger circuit also includes a control and regulation circuit having an input for receiving a feedback signal representative of a temperature, and an output for providing the control signal. The control and regulation circuit operates in either a switching mode or a linear mode in response to the feedback signal.

Abstract: A charging system for a vehicle includes an EMI protection unit, a power factor correction unit, a DC-to-DC converting unit, a DC-to-DC control unit, and a micro-control unit. The power factor correction unit receives an AC voltage via the EMI protection unit and outputs a stable DC voltage. The DC-to-DC converting unit couples to receive the DC voltage and charge the chargeable battery. The DC-to-DC control unit couples to the DC-to-DC converting unit for controlling the DC-to-DC converting unit to charge the chargeable battery. The micro-control unit couples to the DC-to-DC control unit to execute a first charging process to inform the DC-to-DC control unit for controlling the DC-to-DC converting unit to output a first charge voltage, or to execute a second charging process to inform the DC-to-DC control unit for controlling the DC-to-DC converting unit to output a second charge voltage.

Abstract: A system includes an electrical energy storage device that may be in the form of one or more batteries, a charger to selectively charge the electrical energy storage device, and charger cabling sized to electrically interconnect the storage device and the charger together and span a distance separating them. The charger cabling is initially connected across the charger without the storage device to determine information specific to voltage drop caused by the cabling. The system is then reconfigured so that the cabling connects the storage device to the charger for charging. During this charging operation the previously gathered information is used to compensate for the voltage drop along the cabling as the storage device is charged with the charger.

Abstract: In an electric system including a first converter and a second converter connected in parallel, an ECU executes a program including a step of selecting a charging mode for a first battery pack connected to the first converter and a charging mode for a second battery pack connected to the second converter, and a step of controlling a charger connected to the first battery pack, the first converter and the second converter to charge the first battery pack and the second battery pack in the selected charging modes.

Abstract: A charger including a regulator, a controller and a compensation-adjusting unit for accurately charging to a battery device is provided. The regulator provides a charging current to the battery device. The controller is coupled to the regulator for controlling the charging current. The compensation-adjusting unit is coupled to the regulator and the battery device for receiving a first reference voltage. In a first operation mode, the compensation-adjusting unit outputs the first reference voltage to the regulator. In a second operation mode, the controller instructs the regulator to transiently generate a first charging current and a second charging current. Responsive to the first and the second charging currents, the output voltage of the battery device presents a first output voltage and a second output voltage. The compensation-adjusting unit pre-estimates a parasitic resistance of the battery device by detecting the first and the second output voltage, thus compensating the first reference voltage.

Abstract: The present invention relates to an interleaved power factor (PFC) correction boost converter. In order to enable the interleaved PFC boost converter circuit to operate over a wide range of input voltages and frequencies the circuit comprises: A first converter (A); A second converter (B) configured to operate in conjunction with the first converter; and A timing circuit (X) connected to both the first converter (A) and the second converter (B), wherein timing information is shared between the first converter and the second converter.

Abstract: A power supply device is disclosed in the present invention, which includes a DC-DC boost converter and a charge recycling circuit. The DC-DC boost converter is utilized for boosting an input voltage to generate an output voltage, and adjusting a voltage level of the output voltage according to a level switching signal. The charge recycling circuit is electrically connected to the DC-DC boost converter, and is utilized for generating a current path according to the level switching signal to recycle redundant charges from the DC-DC boost converter when the output voltage is switched from high to low and to return stored charges back to the DC-DC boost converter when the output voltage is switched from low to high, so as to accelerate voltage switching of the output voltage and to reduce power consumption of the DC-DC boost converter.

Abstract: A voltage stabilizing circuit is provided between an insulated converter and a non-insulated converter. When an input voltage Vin from the insulated converter rises, a base current Ib is caused to flow into a transistor via a capacitor, thereby causing a collector current Ic that is hfe times larger than the base current Ib to flow into a collector of the transistor. As a result, a capacitance C of the capacitor is caused to produce approximately the same effect as that produced in a case where a capacitor whose capacitance is equivalent to a value obtained by multiplying the capacitance by the current amplification factor hfe of the transistor is inserted between a power supply line and a ground.