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7352158 |
SEPIC synchronous rectification
A SEPIC converter having synchronous rectification, accommodating changes in the converter duty cycle, and the ringing conditions when the converter changes operation from a continuous mode to a...
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7353122 |
Power converters with limited operation to conserve power and with adjustments that overcome ringing
To conserve power when regulating the output voltage (Vo) of a power converter, no adjustment is made to the converter's pulse width modulation times (Tp, Ts) even if the output voltage is off...
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7348765 |
DC-DC converter capable of performing for wide and dynamic voltage range
This patent specification describes a DC-DC converter which includes a switch configured to control an output voltage, a driver circuit configured to drive the switch, a flip-flop configured to...
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7345340 |
Semiconductor integrated circuit and a semiconductor device
A semiconductor integrated circuit that has a quick response to changes in source/drain electrode voltage having an LDMOS transistor. The transistor has a second conduction type first well region...
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7342392 |
Switching regulator with slope compensation independent of changes in switching frequency
Compensation for a switching regulator is attained by developing a compensation signal for a switching regulator that is independent of changes in the switching frequency. The regulator operational...
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7342383 |
Apparatus and method for smooth DCM-to-CCM transition in a multi-phase DC-DC converter
A multi-phase regulator that provides a smooth transition between DCM and CCM by employing partially synchronous rectification in which a duty cycle of a synchronous switch enable signal is...
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7342387 |
System and method for providing a highly efficient wide bandwidth power supply for a power amplifier
A system and a method are disclosed for providing a highly efficient wide bandwidth power supply for a power amplifier. A power supply control circuit of the invention comprises a wide bandwidth...
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7339360 |
Switching voltage regulator with an improved range of input voltage
A switching voltage regulator has a first switch, a second switch, and an inductor, which are coupled together to a switch node. A switch control system applies a drive signal for controlling the...
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7339357 |
Power supply regulation using kelvin tap for voltage sense feedback from point within integrated circuit load
A remote sensing power supply regulator uses high impedance sensing inputs coupled internally to at least one circuit element within an integrated circuit, so as to regulate the voltages produced...
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7339356 |
Apparatus and method for controlling a power converter device
An apparatus for controlling a power converter operating in response to a modulating signal during successive switching cycles includes: (a) A signal sensor coupled with the converter and sensing...
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7336057 |
DC/DC converter
A DC/DC converter includes: a boost converter that boosts an input voltage in accordance with a first control signal; an insulated converter that converts an output of the boost converter in...
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7332899 |
Circuit arrangement for monitoring a voltage supply, and for reliable locking of signal levels when the voltage supply is below normal
A circuit arrangement for monitoring an external voltage supply (VBAT 1 , VBAT 2 ) and for reliable locking of a signal (Z 2 ), which is emitted from a logic circuit ( 8 ), at a voltage level (VDD,...
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7330019 |
Adjusting on-time for a discontinuous switching voltage regulator
A discontinuous switching voltage regulator is disclosed including a charging element operable to generate an output voltage, switching circuitry coupled to the charging element, and switch control...
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7330018 |
Step-down controller circuit
A step-down controller has an input having a first and a second input terminal for applying an input voltage, an output having a first and a second output terminal at which an output voltage can be...
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7330017 |
Driver for a power converter and a method of driving a switch thereof
A driver for a power converter, method of driving a switch thereof, and a power converter employing the same. In one embodiment, the driver includes switching circuitry referenced to a voltage...
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7327129 |
Current sense circuit and method for a DC-to-DC converter
In a DC-to-DC converter, a current sense circuit and method generate a first current by a first transconductive amplifier responsive to the output current of the converter for a controller to...
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7327126 |
Diode circuit
A diode circuit includes a differential circuit having a first MOS transistor whose source is connected to a first input terminal, a second MOS transistor whose source is connected to a second...
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7327130 |
Current sense method
A current-sense circuit for measuring a load current in a switching power regulator may operate independently of process variation and temperature, and measure bi-directional load currents without...
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7327149 |
Bi-directional MOS current sense circuit
A current sensing circuit comprises a power device adapted to conduct a bidirectional current between first and second terminals thereof, first and second sensing devices operatively coupled to the...
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7324355 |
Dc-DC converter
A DC-DC converter is provided which includes a switching element, a choke coil, a flywheel diode, an output capacitor, a diode, and an auxiliary transformer having primary and secondary windings....
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7320482 |
Semiconductor integrated circuit device
The invention intends to provide a technique that achieves a sufficient phase margin with ease. The circuit includes a power supply circuit that is formed with a phase compensating resistor and a...
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7321523 |
System for monitoring processing device utilization in a computer
A monitoring system capable of monitoring utilization of a processing device in a computer. The monitoring system includes a power supply voltage for supplying a core voltage to the processing...
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7321224 |
DC-DC converter with clamping capacitor and output winding for reduced output voltage ripple
A DC-DC converter is structured such that a main switching element has one terminal connected to one terminal of a DC power supply and has the other terminal connected to one terminal of a first...
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7321834 |
Method for calculating power flow solution of a power transmission network that includes interline power flow controller (IPFC)
Power flow models of Interline Power Flow Controllers (IPFC) for large-scale power systems are studied, in details. Mathematical models of the IPFC, using the d-q axis decompositions of control...
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7317441 |
Constant current circuit, drive circuit and image display device
A first amplifier circuit ( 132 ) included in a voltage generating circuit ( 114 ) includes a differential circuit formed of P-type TFT elements (P 101 , P 102 ) and N-type TFT elements (N 101 , N...
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7317286 |
Power supply apparatus for discharge lamp and control method for the same
An apparatus supplies power to at least one discharge lamp. The apparatus includes a buck converter for regulating power supplied to at least one discharge lamp having a switching element driven by...
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7315155 |
PWM control system
A PWM control system, comprising PWM fundamental wave generation means for forming a PWM fundamental wave by dividing a fundamental frequency signal; PWM cycle setting means for setting a PWM cycle...
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7315150 |
Method of power conversion and apparatus which achieves high power factor correction using ripple current mode control
A ripple current mode power converter comprised of a magnetic energy storage element, and a method of determining magnetic storage element charge duration based on periodic magnetic storage element...
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7315160 |
Non linear controlled power supply with a linear soft start operation
A system for controlling a soft start for a switching converter includes a digital feedback control system for receiving an analog voltage signal representing the output of a switching converter,...
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7315156 |
System and method for controlling output-timing parameters of power converters
A system and method is provided for utilizing output-timing data to control at least one output timing parameter of a point-of-load (“POL”) regulator. Specifically, a power supply controller...
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7313005 |
PWM circuit control method
In the PWM circuit of the present invention, a PWM counter counts clock signals. A reference value setting register sets a comparative reference value for determining a duty ratio of a PWM signal....
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7312600 |
AC power regulator circuit
An electronic control system regulates and stabilizes AC line voltage to produce a constant AC voltage output. A switch-mode regulator circuit is employed in conjunction with a variable amplitude...
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7312599 |
Buck converter
A buck converter includes a first transistor, a second transistor, a filter circuit, a capacitor and a switch. The first transistor has a drain for receiving a first DC voltage, a gate for...
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7309976 |
DC/DC converter having an internal power supply
A DC/DC converter in which the DC output set voltage can be raised includes a switching transistor arranged to input an external power supply voltage, a smoothing circuit, a switching control...
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7307481 |
Minimum synchronization frequency discriminator
A minimum frequency synchronization discriminator for use in providing a clock signal for a switch mode power supply automatically detects when the frequency of a sync signal is above a minimum...
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7304460 |
Smart start-up circuit for switching regulators
The smart start-up circuits basically include a sensor, two stacked PMOS transistors, two stacked NMOS transistors, and a feedback line. If the sensing voltage does not reach the expected voltage...
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7304457 |
Bridgeless power factor corrector circuit and control method thereof
The present invention discloses a bridgeless rectified power factor corrector circuit and control method thereof. The bridgeless rectified power factor corrector circuit includes a power factor...
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7304459 |
Synchronous rectification mode dc-to-dc converter power supply device
A DC-to-DC converter power supply device includes drive circuits for generating different drive waveforms from a drive pulse of an oscillation control circuit portion; a first switching element...
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7302600 |
Power supply detection method, apparatus, and system
Circuits in a processor may provide an indication that power supplies are ready when waking from a reduced power state. The processor may include timers to measure a period of time, and may utilize...
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7301317 |
Output current sharing
A regulator with output current sharing including an output node and multiple converters. Each converter includes a PWM controller and switch circuit, an inductor, and an RC circuit. Each PWM...
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7301488 |
Digital PWM controller for preventing limit cycle oscillations
An apparatus and method for minimizing limit cycle oscillations within a switched power supply includes providing a programmable dither signal as an input to the digital control loop connected...
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7301288 |
LED buck regulator control IC
A high speed buck control IC for constant LED current regulation. A continuous mode hysteretically controlled buck regulator monitors the load current using an accurate on-chip band-gap voltage...
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7301318 |
Circuit arrangement for voltage adjustment
A circuit arrangement for voltage regulation having a series regulator with a regulating amplifier and a charge pump that is connected downstream of the regulating amplifier, a reference voltage...
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7298121 |
Circuit and method for increasing the stability of switch-mode power supplies
An improved circuit and method for increasing the stability of switch-mode power supplies via frequency fold-back is disclosed. For example, a circuit for increasing the stability of a switch-mode...
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7298118 |
Power converter employing a tapped inductor and integrated magnetics and method of operating the same
A power converter employing a tapped inductor and method of operating the same. In one embodiment, the power converter includes first and second tapped inductors including a tapped winding having a...
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7298122 |
Actuation circuit for a switch regulating the power consumption in a switching converter
An actuation circuit for a switch element regulating the power consumption of an inductive energy storage element in a switching converter, used to convert an input voltage into an output voltage,...
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7298123 |
Apparatus and circuit for power supply, and apparatus for controlling large current load
A power supply apparatus includes a diode that is disposed in the path of a main current that is a subject of power control. The diode includes a substrate; a gallium-nitride buffer layer formed on...
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7294994 |
Power supply
An output detection feedback section ( 5 ) for controlling the power supply output voltage of a converter unit ( 4 ) in response to an error signal Ve has an error amplifier ( 26 ) for outputting...
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7294992 |
Semiconductor device, with an off detection circuit
According to the present invention, a semiconductor device is provided wherein a stepdown-type DC-DC converter includes a first off detection circuit, a second off detection circuit, a capacitor, a...
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7294993 |
Method and apparatus for customizing of a power supply based on load characteristic data
A power supply for powering an electrical load, the electrical load generating load characteristic data that determines a power supply characteristic to be provided to the electrical load from the...
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