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Switching Power Supply patents



      
           
This page is updated frequently with new Switching Power Supply-related patents. Subscribe to the Switching Power Supply RSS feed to automatically get the update: related Switching RSS feeds.

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Date/App# patent app List of recent Switching Power Supply-related patents
04/17/14
20140107856
 Adjustable shunt regulated & switching power supply for loop powered transmitter patent thumbnailAdjustable shunt regulated & switching power supply for loop powered transmitter
A loop powered process instrument comprises a control system measuring a process variable and developing a measurement signal representing the process variable. An output circuit, for connection to a remote power source using a two-wire process loop, controls current on the loop in accordance with the measurement signal.
04/17/14
20140104894
 Switching power supply system patent thumbnailSwitching power supply system
A control circuit controlling the driving of a switching device includes an under voltage limiting operation circuit stopping the operation of the control circuit when a power supply voltage supplied from the auxiliary winding of an insulating transformer becomes lower than a predetermined power supply lower limit voltage, an fb voltage decision circuit stopping the driving of the switching device when a feedback voltage indicating the state of a load becomes lower than the predetermined threshold value, a flip-flop brought into a set state by an output of the fb voltage decision circuit and a reset state when the power supply voltage exceeds the voltage ensuring the normal operation of the control circuit, and a switching circuit to set the power supply lower limit voltage in the under voltage limiting operation circuit, lower than that of the normal operation when the flip-flop is set.. .
04/17/14
20140103895
 Compensation circuit and switching power supply thereof patent thumbnailCompensation circuit and switching power supply thereof
Disclosed are compensation circuits for a switching power supply. In one embodiment, a compensation circuit can include: (i) a transconductance amplifier configured to receive a reference signal and a feedback signal, and to generate an amplifier output signal according to a difference between the reference signal and the feedback signal; (ii) a switching circuit configured to receive the amplifier output signal, where the switching circuit is controllable by a control signal from a switch control circuit; and (iii) a charging circuit coupled to the switching circuit, where the charging circuit is configured to be charged by the amplifier output signal in response to the control signal, and to generate a compensation signal therefrom..
04/17/14
20140103736
 Signal transmission device and switching power supply patent thumbnailSignal transmission device and switching power supply
A signal transmission device of aspects of the invention can include a master circuit connected to the primary sides of first and second transformers and a slave circuit connected to the secondary sides of the first and second transformers. The master circuit sets one of first and second transmitting/receiving circuits for transmitting operation and the other for receiving operation according to a control signal, and detecting a leading edge and a falling edge of the control signal, transmits a pulse signal with the pulse interval changing after a predetermined period of time.
04/10/14
20140099139
 Switching power supply and image forming apparatus equipped with switching power supply patent thumbnailSwitching power supply and image forming apparatus equipped with switching power supply
A power supply device including a transformer having a primary winding and a secondary winding, and a switching element connected to the primary winding configured to drive the switching element to output voltage from the secondary winding includes a control unit configured to drive the switching element such that the switching element is turned on and, in which, in a case where the control unit performs an intermittent drive operation which repeats a period for which the switching element is driven and a period for which the drive of the switching element is stopped, in which the control unit drives the switching element such that the switching element is turned off before the voltage according to the current flowing to the primary winding reaches the voltage output from the secondary winding in the period for which the switching element is driven.. .
04/10/14
20140098574
 Switching power supply device patent thumbnailSwitching power supply device
A switching power supply includes a series resonant circuit that includes a resonant inductor and a resonant capacitor connected in series with a primary winding of a converter transformer. By controlling turning on and off of first and second switching elements in a complementary manner, current is supplied to the series resonant circuit.
04/10/14
20140097881
 Balanced auxiliary on time generator for multiphase stackable constant on time control architecture patent thumbnailBalanced auxiliary on time generator for multiphase stackable constant on time control architecture
A control circuit configured to control a switching power supply including a ramp generator configured to generate a triangular waveform. A comparator is configured to generate a series of pulse width modulated (pwm) pulses at a first frequency and to regulate the switching power supply.
04/03/14
20140092644
 Switching power supply device and method for circuit design of the switching power supply device patent thumbnailSwitching power supply device and method for circuit design of the switching power supply device
A switching power supply device includes a rectifying circuit configured to rectify an ac voltage and to output a rectified voltage, a smoothing capacitor configured to smooth the rectified voltage and to output a smoothed voltage, a first dc-dc converter configured to convert the smoothed voltage into an intermediate voltage and to output the intermediate voltage, and a second dc-dc converter configured to convert the intermediate voltage into an output voltage and to output the output voltage substantially free of ripple. The first dc-dc converter is configured to perform a step-up operation, a step-up/down operation, and a step-down operation according to the smoothed voltage, and to output the intermediate voltage including a ripple or the intermediate voltage substantially free of ripple..
04/03/14
20140091890
 Switching power supply patent thumbnailSwitching power supply
In an electrical energy generator, at least one permanent magnet generates flux and a magnetizable member forms the single flux path. An electrically conductive coil is wound around the magnetizable member, and a plurality of flux switches are operative to sequentially reverse the flux from the magnet through the member, thereby inducing electrical current in the coil.
04/03/14
20140090530
 Power tool with circuit for sensing contact between an implement and an object patent thumbnailPower tool with circuit for sensing contact between an implement and an object
A power tool includes a sensing circuit mounted on a printed circuit card is electrically connected to a switching power supply that supplies electrical power to the sensing circuit. The sensing circuit is not connected to earth ground to enable detection of an operator approaching a moving implement without the operator necessarily being electrically connected to earth ground..
03/27/14
20140085949
Switching power supply
A switching power supply that conducts switching of an input voltage by a switching element to obtain a specified output voltage includes: an on width controlling component that controls an on width of the switching element; a zero current detecting component that detects zero current through the switching element to turn on the switching element; a frequency reducing component that delays a turn on timing of the switching element upon detection of a light load condition by a load condition detecting component to reduce a switching frequency of the switching element; and an ac period detecting component that detects a period of the input voltage to hold the load condition detected by the load condition detecting component over every period detected by the ac period detecting component.. .
03/27/14
20140084791
Power supply apparatus and luminaire
A power supply apparatus of an embodiment includes a first filter, a second filter, and a switching power supply. The first filter and the second filter attenuate a common mode current to a level lower than a normal mode current.
03/20/14
20140078794
Switching power source device
A switching power source device includes a switching power supply main body switching an input voltage via a switching element to obtain a predetermined dc output voltage, a control circuit performing on/off-driving of the switching element; and a capacitor connected to the control circuit to be charged by an external power supply via an activation switch circuit during activation and charged by a voltage generated in the switching power supply main body after completion of activation to supply a control power voltage to the control circuit. The control circuit further includes a latch circuit set according to a latch signal emitted when an abnormality is detected, to stop the driving of the switching element, a discharge circuit receiving the latch signal to be turned on and discharging charges accumulated in the capacitor, and a comparator resetting the latch circuit when the control power voltage decreases to an operation stop voltage..
03/20/14
20140078788
Synchronous rectifying control method and circuit for isolated switching power supply
Disclosed are synchronous rectifying control methods and circuits for an isolated switching power supply. In one embodiment, a method can include: (i) generating a ramp voltage based on a power terminal voltage, where the power terminal voltage includes a voltage between first and second power terminals of a synchronous rectifier in the isolated switching power supply; (ii) determining whether the power terminal voltage starts declining; (iii) comparing the ramp voltage to a threshold voltage when the power terminal voltage starts to decline, where the threshold voltage substantially matches a minimum conduction time of the synchronous rectifier; (iv) reducing the ramp voltage and controlling the synchronous rectifier in an off state when the ramp voltage is lower than the threshold voltage; and (v) reducing the ramp voltage and controlling the synchronous rectifier in on state when the ramp voltage is higher than the threshold voltage..
03/20/14
20140078784
Switching power supply
A switching power supply can reduce conduction noise when frequency spread control is conducted simultaneously with switching frequency reducing control. The switching power supply comprises a frequency controller that controls the switching frequency of the switching element corresponding to a load condition and reduces the switching frequency in a light load period, a frequency spread modulator that modulates the switching frequency with a predetermined frequency spread width, and a frequency skipping controller that controls the frequency controller to skip a fundamental frequency of the switching frequency when the fundamental frequency becomes a predetermined threshold frequency..
03/20/14
20140077867
Bias voltage generating circuit and switching power supply thereof
Disclosed herein are bias voltage generating circuits configured for switching power supplies, and associated control methods. In one embodiment, a bias voltage generating circuit can include: (i) a first control circuit configured to compare a drain-source voltage of a switch against a bias voltage; (ii) a capacitor, with the bias voltage across the capacitor; (iii) a second control circuit configured to control the switch, and that is enabled when the bias voltage is at least as high as an expected bias voltage; (iv) the first control circuit being configured to control the capacitor to charge when the drain-source voltage of the switch is greater than the bias voltage; and (v) the bias voltage being less than an overvoltage protection voltage when the capacitor charges, and where the overvoltage protection voltage comprises a voltage that is a predetermined amount higher than the expected bias voltage..
03/20/14
20140077790
Switching power supply device
A switching power supply device includes a first control circuit that turns a first switch on when first and second switches are off and a voltage at a junction node therebetween is increased to decrease a voltage across the first switch to a first threshold voltage, turns off when a first on-period has elapsed from when the first switch is turned on, and lengthens the first on-period as an output voltage decreases relative to a reference voltage; and a second control circuit that turns the second switch on when both switches are off and a voltage across the second switch is decreased to a second threshold voltage, turns off when a reverse current flows through the inductor, sufficient to increase the voltage at the junction node to decrease the voltage across the first switch to the first threshold voltage after the second switch is turned off.. .
03/20/14
20140077714
Driving device, light-emitting device and projector
A driving device includes a switching power supply circuit to convert input power to output power; a first switching element which opens and closes a circuit of a load; an output capacitor connected in parallel to the load and the first switching element; a selection switch disposed between the inductor and the output capacitor, the selection switch switching between a first selection state where the load is electrically connected to the inductor and the second selection state where a reference potential portion is electrically connected to the inductor; a timing controller which operates the switching power supply circuit while the first switching element is closed; and a controller which puts the selection switch into the second selection state before the first switching element is closed.. .
03/20/14
20140077713
Luminaire
A luminaire according to one embodiment includes a dc power supply circuit, a switching power supply, and a lighting load. The dc power supply circuit converts an ac voltage controlled in phase to a dc voltage.
03/13/14
20140071724
Bridge-less step-up switching power supply device
A bridge-less step-up switching power supply device includes (i) a first and a second reactor having: a first and a second main winding connected to a first and a second input terminal, respectively; and a first and a second auxiliary winding magnetically coupled to the first main winding and connected to the first and second main windings, the first and second auxiliary windings having a first and a second leakage inductance, respectively; (ii) a first and a second diode connected between the first and second auxiliary windings and a first output terminal, respectively; (iii) a first capacitor connected between the first output terminal and a second output terminal; (iv) a second capacitor connected between a connection point of a third switch and a fourth switch, and the first output terminal; and (v) a controller for controlling turning on/off of first to fourth switches.. .
03/13/14
20140071717
Switching power supply apparatus and semiconductor device
A switching power supply apparatus includes: an input terminal; an output terminal; a switching element; an input and output converting unit which converts input voltage applied through the switching element into output voltage to supply output power to a load; an output voltage feedback unit which outputs a feedback signal, based on the output voltage; a switch current detecting unit which detects current flowing through the switching element; an oscillating frequency setting unit which sets the switching frequency of the switching element, based on the feedback signal; a peak current setting unit which controls turn-off of the switching element by setting a current threshold such that a switch current peak (i) is constant regardless of a change in the output power and (ii) increases as the input voltage increases; and a switching control unit which controls switching operation of the switching element.. .
03/13/14
20140070385
Flip-chip package structure and method for an integrated switching power supply
Disclosed are flip-chip package structures and methods for an integrated switching power supply. In one embodiment, a flip-chip package structure can include: (i) a die with an integrated switching power supply, where a first surface of the die includes first bumps with different polarities; (ii) a redistribution layer including redistribution layer units, each having a first surface to connect bumps with a same polarity from the first bumps, the redistribution layer having a second surface including second bumps to redistribute polarities; (iii) a lead frame having pins, where a first surface of the lead frame can connect bumps with a same polarity from the second bumps; and (iv) a flip-chip package configured to package the die, the redistribution layer, the first and second bumps, and the lead frame, where a second surface of the lead frame provides electrical connectivity between the integrated switching power supply and a pcb..
03/06/14
20140063861
Ac-dc voltage converter with low standby power consumption and control method thereof
Disclosed are ac-dc voltage converter circuits and methods for low standby power consumption. In one embodiment, a method can include: (i) detecting operating states of an input power supply, where the input power supply is received by a safety capacitor and provided to a switching power supply circuit after being rectified and filtered; (ii) removing a phantom load when the input power supply operates in a normal operating state; (iii) loading the phantom load when the input power supply operates in an under voltage lock out state; and (iv) when the input power supply operates in the under voltage lock out state, using energy stored in the safety capacitor to supply power to a load of the switching power supply circuit and the phantom load, and disabling a power stage circuit until a voltage of the safety capacitor is reduced to less than a safety threshold value..
03/06/14
20140062439
Switching power supply
A switching power supply comprises a noise detecting circuit and a canceling signal generating circuit. The noise detecting circuit detects gnd bounce noise developing on a ground line of the control circuit accompanying switching operation of a switching element.
02/27/14
20140056047
High-efficiency bias voltage generating circuit
Disclosed are bias voltage generating circuits and methods for a switching power supply. In one embodiment, a switching power supply can include: (i) a driver circuit configured to receive a bias voltage, and to drive a switch in a power stage of the switching power supply; (ii) where a ratio of an output voltage of the switching power supply to an expected bias voltage of the driver circuit is configured as a proportionality coefficient; (iii) a bias voltage generating circuit configured to generate the bias voltage for the driver circuit based on a first voltage; and (iv) an h-shaped inductor coupled to an input of the bias voltage generating circuit, where the first voltage is configured to be generated based on a number of turns of the h-shaped inductor and the proportionality coefficient..
02/27/14
20140055168
Source-electrode driving control circuit and control method thereof
Disclosed are driving control methods and circuits for quasi-resonant control of a main power switch of a switching power supply. In one embodiment, a driving control circuit can include: (i) a clamp circuit coupled to a gate of the main power switch, where the clamp circuit is configured to clamp a voltage of the gate to a clamping voltage that is greater than a threshold voltage of the main power switch; (ii) a valley voltage detection circuit configured to activate a valley control signal when a drain-source voltage of the main power switch is at a resonance valley level; and (iii) a source voltage control circuit configured to reduce a voltage of a source of the main power switch to turn on the main power switch in response to the valley control signal being activated..
02/20/14
20140049992
Switching power supply
A switching power supply is suitable for transforming ac input voltage to dc output voltage. The switching power supply includes a transformer, a power circuit, an output circuit, a switching element, a control element, a shielding element and a metal element.
02/20/14
20140049241
Dimming control for a switching power supply
An example controller includes a measurement block and a drive block. The measurement block determines an amount of time that a dimmer circuit, that is coupled to an input of a power supply, disconnects an ac input voltage.
02/20/14
20140049237
Switching power supply device and electronic appliance therewith
Provided is a switching power source device in which fluctuation of the switching frequency can be suppressed without impairing the advantages of a non-linear control system. A switching power source device is provided with: switching control units of non-linear control type that generate an output voltage (out) from an input voltage (in) by performing on/off control of switching elements in accordance with the results of comparing a feedback voltage (fb) and reference voltage (ref); and an on time setting unit that monitors switching voltage (sw) appearing at one end of the switch terminals, and sets the on time (ton) of the switching element in the switching control units based on the duty of the switching voltage (sw)..
02/13/14
20140043868
Switching power supply system and control circuit of the switching power supply system
A switching power supply system includes a transformer having a primary winding, a secondary winding and a tertiary winding, a switching device inputted to the primary winding carrying out switching operation on the basis of a first control signal or a second control signal, an output voltage producing section rectifying and smoothing a voltage generated in the secondary winding to produce an output voltage, an output voltage detecting section producing an output voltage detection signal based on a voltage generated in the tertiary winding, a checking pulse generator generating pulses of the first control signal, and a switching controlling section producing the second control signal on the basis of the output voltage detection signal. The switching power supply system is capable of carrying out stable control of the output voltage on the secondary winding side of the transformer with a low power loss..
02/13/14
20140043867
Switching power supply device control circuit and switching power supply
A switching power supply device control circuit and switching power supply can combat fluctuation due to the input voltage in the peak current of a switching element, even when using an oscillator. A control ic is connected to a switching element and to a current detecting resistor, and controls the switching element, the control ic being configured of an ocp comparator that detects an overcurrent with respect to a load, an overcurrent level setting circuit that corrects a fluctuation occurring in the peak current of the switching element in response to the output voltage from the ac input, an oscillator having a frequency modulating function whereby the switching frequency with respect to the switching element can be modulated, and a slope compensation circuit that generates a slope compensation signal increasing monotonically in proportion to the time from the start of each cycle of an oscillating signal of the oscillator..
02/06/14
20140036552
Semiconductor device provided with switching power supply device with intermittent oscillation control
A control circuit varies an intermittent oscillation frequency using a period signal. A period signal period signal frequency is set to a frequency lower than the intermittent oscillation frequency, or is set to be higher than the intermittent oscillation frequency and to a frequency other than integer multiples of the intermittent oscillation frequency.
02/06/14
20140035543
Phase doubling for switching power supply
A switching power supply control system may include logic to generate a greater number of second switching control signals in response to a first number of original switching control signals. For example, the logic may increase the number of phases that may be controlled by an existing switching power supply controller.
02/06/14
20140035542
Non-linear pwm controller
A switching power supply includes a circuit having at least two reactive components to provide an output voltage and capable of being switched from a first output state to a second output state. A switching component switches the circuit between at least two switching states including the first output state and the second output state.
01/23/14
20140023126
Universal network interface device
An universal network interface device with an enclosure, an access module, a modem module, a switching power supply and a battery pack.. .
01/16/14
20140016365
Control circut of a quasi-resonance switching power supply
Aspects of the provide a control circuit of a quasi-resonant switching power supply in which the switching frequency can be adequately reduced under a light load condition. Some aspects include a control circuit of a quasi-resonant switching power supply that performs switching operation of a switching element based on a bottom detection signal.
01/16/14
20140016364
Switching power supply device
In some aspects of the invention, a load state detecting circuit is configured so that a threshold voltage for determining the size of a load of a dc-dc converter is set in the load state detecting circuit based on a maximum value of an output voltage of a power factor correction converter in an operation-stopped state of the power factor correction converter, so that the load state detecting circuit outputs an operation-enable signal when a feedback voltage indicating the size of the load of the dc-dc converter exceeds the threshold voltage. Thus, by way of some aspects of the invention, it is possible to provide a switching power supply device which can control enabling and stopping operation of a power factor correction converter reliably in accordance with a load state of a dc-dc converter obtaining a predetermined dc output voltage by switching an output voltage of the correction converter..
01/16/14
20140016363
Switching power supply
Aspects of the invention provide a switching power supply that exhibits an improved conversion efficiency. In aspects of the invention, a load condition detecting circuit sets a threshold voltage for determining the magnitude of the load on the dc-dc converter based on the maximum value of the output voltage of the power factor correction converter in a suspended period of the power factor correction converter.
01/09/14
20140008981
Switching power supply apparatus
In a switching power supply apparatus, a main switching control circuit performs switching control of a low-side switch device and a high-side switch device based on a feedback signal corresponding to a main output voltage output from a secondary winding of a transformer, and applies and stops applying a voltage to a primary winding of the transformer. A digital signal processor, in accordance with the load status of the main load, changes set target values, performs switching control of switch devices of the sub-rectifying and smoothing circuits, and drives sub-loads..
01/09/14
20140008968
Apparatuses and methods for supplying electrical power to an electrocrushing drill
Methods and apparatuses for directly charging capacitors in a down-hole pulsed power system used for electrocrushing drilling. An above ground power supply is directly connected to the capacitors.
01/02/14
20140001344
Switched mode night vision device power supply
A night vision device with a switching power supply and a method of powering a night vision device with switching circuits are provided. The switching power supply converts a battery voltage to high dc voltages for powering photocathode, screen, and mcp of the night vision device.
12/26/13
20130343097
Switching power supply
A switching power supply achieves simultaneously achieves suppression of surge voltage and satisfactory transient response. The switching power supply comprises a switching element connected to a primary winding of an isolation transformer, a resonance capacitor connected to the switching element, an output capacitor connected to a secondary winding of the isolation transformer through a rectifying diode, and a control circuit on/off driving the switching element.
12/19/13
20130336020
Method and apparatus to reduce audio frequencies in a switching power supply
An example power supply regulator includes an energy transfer element, a switch, and a controller. The controller includes a switch signal generator, a modulation circuit, and a multi-cycle modulator circuit.
12/19/13
20130335862
Overvoltage protection system for power system with multiple parallel-connected switching power supplies
An ovp system which includes a plurality of ovp circuits coupled to respective parallel-connected switching power supplies. Each ovp circuit comprises a bus voltage overvoltage detection circuit having a first output which toggles when the voltage on the common power bus exceeds a reference voltage, a modulation flag detection circuit which receives a value that varies with a parameter associated with the pwm or pfm drive signals generated for the switching power supply to which the ovp circuit is coupled and has a second output which toggles when the parameter value exceeds a reference parameter value, logic circuitry which toggles an output when both the first and second outputs toggle, and an overvoltage response circuit which initiates a course of action such as latching or shutting down the switching power supply to which the ovp circuit is coupled when the logic circuitry's output toggles..
11/28/13
20130314606
Switching power supply device
A switching power supply device includes: a non-linear control type switching control unit that, in accordance with a result of a comparison between a feedback voltage and a reference voltage, performs on/off control of a switch element, and thereby generates an output voltage from an input voltage; a backflow current detection unit that, upon detecting a backflow current flowing to the switch element, forcibly switches off the switch element; and an on-time setting unit that sets an on-time of the switch element, in a case of the backflow current not being detected, in accordance with a duty of the switch element, and in a case of the backflow current being detected, in accordance with a switch voltage appearing at one end of the switch element or the output voltage.. .
11/21/13
20130308359
Switching power supply device
In some aspects of the invention, a zero current detecting circuit of a switching power supply device detects a gradient of the current flowing in an inductor in the off state of the switching element and detects the timing at which the current through the inductor becomes zero corresponding to the detected gradient of the inductor current. Specifically, the zero current detecting circuit receives a signal for controlling on/off driving of the switching element and a voltage signal proportional to the current flowing through the inductor in an off state of the switching element.
11/21/13
20130308347
Resonant switching power supply device
A winding voltage arising in a first winding on the primary side of a transformer is detected in a winding voltage detector unit formed of a second winding, and current flowing through a resonant circuit is detected in a resonant current detector unit formed of an auxiliary capacitor and a resistor. The timing at which the polarity of the detected winding voltage is inverted is detected in a control and drive unit, and the time at which the polarity of the resonant current, whose phase is delayed with respect to that of the winding voltage, will be inverted is determined in advance.
11/21/13
20130308061
Switching power supply device
A switching power supply device has a reference voltage generator for generating a reference voltage, a ripple injector for generating a ripple component by use of a pulse voltage indicating the on/off state of a switching element and injecting the ripple component into the reference voltage, an integrated voltage generator for generating an integrated voltage commensurate with the integrated value of the pulse voltage throughout its on- and off-duty periods, a subtractor for lowering according to the integrated voltage the reference voltage before injection of the ripple component or the supply voltage to a buffer that feeds the ripple injector with the pulse voltage after making its pulse height constant, a comparator for comparing a feedback voltage with the reference voltage after injection of the ripple component, and a switching controller for generating an output voltage from an input voltage by non-linear control by turning on and off the switching element according to the output signal of the comparator.. .
11/21/13
20130307616
Snubber for a direct current (dc)-dc converter
Circuitry, which includes a direct current (dc)-dc converter having a first switching power supply is disclosed. The first switching power supply includes a first switching converter, an energy storage element, a first inductive element, which is coupled between the first switching converter and the energy storage element, and a first snubber circuit, which is coupled across the first inductive element.
11/21/13
20130307497
Switching power supply device
Aspects of the invention include a switching power supply device that includes a zero current detecting circuit that detects zero current of electric current flowing through the inductor to turn on the switching element, an on width generating circuit that determines the on width of the switching element to turn off the switching element, and an off width detecting circuit that detects the off width of the switching element based on the output of the on width generating circuit and the output of the zero current detecting circuit, and holds the off width until the next operating cycle. Aspects of the invention also include an on width adjusting circuit that is included in the on width generating circuit and adjusts the on width of the switching element in the next operation cycle according to the width detected by the off width detecting circuit..
11/21/13
20130307414
Hybrid plasma reactor
A hybrid plasma reactor includes a reactor body having a plasma discharge space, a gas inlet, and a gas outlet; a hybrid plasma source including an inductive antenna inductively coupled to plasma formed in the plasma discharge space and a primary winding coil transformer coupled to the plasma and wound in a magnetic core; and an alternating switching power supply for supplying plasma generation power to the inductive antenna and the primary winding coil. The hybrid plasma reactor induces a plasma discharge using the inductively coupled plasma source and the transformer coupled plasma source, so that it has a wide operational area from a low pressure area to a high pressure area..
11/14/13
20130301317
Switching power supply device
Provided is a switching power supply device capable of sufficiently removing ripple noise due to the switching frequency, the ripple noise being superimposed on an ac line, thereby stabilizing an output voltage. The switching power supply device includes: a switch including a first main terminal and a second main terminal, the first main terminal being connected to an inductor, the second main terminal being connected to a predetermined constant power supply unit, the switch being configured to connect or disconnect between the inductor and the constant power supply unit; and a control circuit configured to drive the switch at a predetermined switching frequency.
11/14/13
20130301312
Isolated switching power supply apparatus
An isolated switching power supply apparatus includes a transformer, a primary-side circuit that includes at least a switching element and supplies input power from an input terminal to a primary winding by controlling on/off of the switching element, and a secondary-side circuit that is electrically isolated from the primary-side circuit and that outputs output power resulting from power conversion performed by the transformer from a secondary winding to an output terminal. The apparatus includes a first circuit board to which the primary winding is connected and that includes the primary-side circuit and the input terminal, and a second circuit board to which the secondary winding is connected and that includes the secondary-side circuit and the output terminal.
11/14/13
20130301308
Switching power supply device
In a switching power supply device with reduced size and increased power conversion efficiency, a first resonant circuit including a series resonant inductor and a series resonant capacitor, and a second resonant circuit including a series resonant inductor and a series resonant capacitor, are caused to resonate with each other to cause sympathetic vibration of each resonant circuit, such that transmission is performed by utilizing both magnetic field coupling and electric field coupling between a primary winding and a secondary winding. Operation at a switching frequency higher than a specific resonant frequency of an overall multi-resonant circuit allows a zvs operation to be performed, enabling a significant reduction in switching loss and high-efficiency operation..
11/14/13
20130301306
Switching power supply device
In a switching power supply device with reduced size and increased power conversion efficiency, a secondary-side rectifier circuit includes an adder-rectifier circuit that stores a voltage generated in a secondary winding in a capacitor as electrostatic energy in an on period of one of a high-side and low-side switching circuits or, and adds the voltage in the capacitor and the voltage generated in the secondary winding and outputs the sum as a direct-current voltage during in an on period of the other of the high-side and low-side switching circuits. A switching control circuit adjusts an output power to be output from the secondary-side rectifier circuit, by using on-period ratio controller that controls a proportion of periods during which the respective high-side side and low-side switching elements are brought into a conductive state..
10/31/13
20130289922
Power supply built-in testing
A disclosed system includes a switching power supply including a switching circuit and one or more monitoring circuits configured to monitor one or more power characteristics of the switching power supply, and a processing circuit configured to control the one or more monitoring circuits to perform a built-in test (bit) of the one or more monitoring circuits.. .
10/24/13
20130281819
Noise suppression in an optoacoustic system
An optoacoustic imaging system includes an ultrasound transducer array, first and second light sources and a switching power supply that generates power for the light sources. The switching power supply includes an input for impeding its switching operation.
10/24/13
20130279203
Switching power supply device
A switching power supply device that can reduce power supply noise includes a switching power supply device main body that switches a semiconductor switching element at a power supply frequency fs, and supplies power to an electronic instrument such as an am radio receiver. The switching power supply device detects an am radio reception frequency fc and a power supply harmonic component that interferes with the am radio reception frequency fc.
10/17/13
20130272031
Switching power supply apparatus
A transformer that realizes zvs operation includes a primary winding and a secondary winding. A control circuit turns switching elements on and off in a complimentary manner in order to repeatedly invert the voltage applied to the primary winding.
10/17/13
20130271931
High voltage transformer
Provided is a high voltage transformer for outputting a high voltage using ac commercial power as an input in a switching power supply apparatus. The high voltage transformer includes a case, a bobbin, a pair of cores and a voltage distribution pcb.
10/17/13
20130271876
Switching control circuit and switching power supply apparatus
In a switching control circuit, a length of a soft start period is set in accordance with a time constant of an external circuit connected to a soft start terminal of a switching control ic. A current flowing through a switching element is detected at a current detection terminal.
10/17/13
20130271221
Direct current (dc)-dc converter having a multi-stage output filter
A direct current (dc)-dc converter that includes a first switching converter and a multi-stage filter is disclosed. The multi-stage filter includes at least a first inductance (l) capacitance (c) filter and a second lc filter coupled in series between the first switching converter and a dc-dc converter output.
10/17/13
20130271096
Switching power supply device
A switching power supply device includes: a positive voltage output circuit connected to a direct-current power supply, the positive voltage output circuit including a first switching element, a voltage boosting inductor, a first rectifying element and a first capacitor; a negative voltage output circuit connected to the power supply, the negative voltage output circuit including a second switching element, a voltage dropping inductor, a second rectifying element and a second capacitor; and an adder circuit configured to add switching currents flowing when the first and the second switching elements are operated. The circuit elements of the positive voltage output circuit are symmetrical with those of the negative voltage output circuit.
10/03/13
20130258731
Power supply control method for constant current constant power control
A digital power supply and power supply controller are presented, including a voltage control loop and a current control loop, with a controller for pulse width modulating a switching power supply according to a voltage control loop duty cycle output or a current control loop duty cycle output, in which the controller selectively presets the voltage control loop duty cycle output to a predetermined value before switching from current loop control to voltage loop control and/or inhibits increase in a voltage loop integrator value during current loop control to mitigate voltage overshoot.. .
10/03/13
20130257532
Power conversion circuit and electronic device with power conversion circuit
A power conversion circuit includes a pulse width modulator, a feedback module, a negative voltage producing module, a voltage regulating module, a path switch, and a rectifier module. The path switch is connected to a power port connected to a power source.
10/03/13
20130257393
Switching power supply apparatus
In a switching power supply apparatus, a switching element is turned on/off to intermittently conduct current input via an inductor. Current input during a period in which the switching element is turned off is supplied to an electrolytic capacitor via a conduction path.
09/26/13
20130250625
Switching power supply apparatus
In a switching power supply apparatus, a low-side switching device is connected in series with a primary winding. A high-side switching device and the primary winding define a closed loop.
09/26/13
20130249439
Adaptive current regulation for solid state lighting
Representative embodiments provide an apparatus, system, and method for power conversion to provide power to solid state lighting, and which may be coupled to a first switch, such as a dimmer switch. A representative system for power conversion comprises: a switching power supply comprising a second, power switch; solid state lighting coupled to the switching power supply; a voltage sensor; a current sensor; a memory; a first adaptive interface circuit to provide a resistive impedance to the first switch and conduct current from the first switch in a default mode; a second adaptive interface circuit to create a resonant process when the first switch turns on; and a controller to modulate the second adaptive interface circuit when the first switch turns on to provide a current path during the resonant process of the switching power supply..
09/19/13
20130242630
Switching power supply device
A switching power supply device includes: a chopper circuit that adjusts a dc voltage input through a reactor to a desired dc voltage by performing an on/off operation of a switching element; an inverter circuit that converts an output of the chopper circuit into a desired ac voltage; a first capacitor that is provided on a side of the inverter circuit relative to the switching element; a second capacitor that is provided on a side of the inverter circuit relative to the switching element; and a resistor that is in a resonant loop formed by three constituent elements that are the first capacitor, the second capacitor, and a wiring inductance between the chopper circuit and the inverter circuit, where the resistor is connected in series to the second capacitor and inserted between the dc bus-bars.. .
09/19/13
20130242620
Power supply apparatus driving circuit, power supply apparatus driving integrated circuit, and power supply apparatus
In a power supply apparatus driving circuit, at startup, an input voltage of a switching power supply is used as a driving power supply, and loss generated in a starting circuit is reduced. The starting circuit and the driving circuit are configured as a single driver.
09/19/13
20130241512
Step-up switching power supply
A hysteresis control step-up switching power supply includes a switching element. Current flowing through the switching element does not continue to increase indefinitely.
09/19/13
20130241511
Switching power supply with fixed off time mode and control method thereof
The present invention provides a controller used in a switching power supply. The controller comprises an oscillator, a first comparison circuit and a logic circuit.
09/19/13
20130241440
Phase angle measurement of a dimming circuit for a switching power supply
An example switched mode power supply includes a timer, a threshold adjust circuitry, a comparator, and a control circuitry. The timer times a duration between crossings of a phase-dimmed signal across a first threshold.
09/19/13
20130241422
Christmas strip lighting control system
A christmas strip lighting control system, having a main structure composed of a switching power supply and a programmable lighting control system, and operates in coordination with a micro controller unit to form the christmas strip lighting control system applicable for use in led strip lighting sets providing diversified output types. The present invention not only reduces the number of components needed, achieving more extensive adaptability and more convenient production to benefit protecting the green environment, but also provides accurate control over output power, enables more stable effectiveness, reduces failure rate to the minimum and prolongs serviceable life..
09/19/13
20130241289
Switching power supply device and control circuit thereof
A control circuit of a switching power supply device has a first current source capable of supplying an auxiliary current to a load resistance of the switching power supply device when a load current flowing through the load resistance increases, a second current source capable of pulling in a current from the load resistance when the load current flowing through the load resistance decreases, and an auxiliary current controller configured to activate the first current source or the second current source from when a variation in the load current flowing through the load resistance is detected to have exceeded a predetermined level until a current flowing through the inductor becomes equal to the current flowing through the load resistance.. .


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Switching Power Supply topics: Switching Power Supply, Duty Cycle, Feedback Signal, Semiconductor Switch, Semiconductor, Sound Transducer, Transducer, Imaging System, Ultrasound, Data Acquisition, High Speed, Electronic Device, Current Loop, Switched Mode Power Supply, Reference Voltage

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