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7635957 |
LED temperature-dependent power supply system and method
A LED based lighting system ( 20 ) employs a LED load temperature sensor ( 40 ) for generating a temperature-sensing signal (TSS) indicative of an operational temperature of the LED load ( 10 ), a...
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7635969 |
Power supply unit and portable device
A power supply unit is adapted to automatically switch its operational mode between a light load mode and a heavy load mode depending on the level of its output current. The unit has a first error...
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7635968 |
Techniques for handling low line voltage Conditions in power supply units
A technique for addressing a low line voltage condition in an information handling system includes determining whether a magnitude of an input voltage of a power supply unit (PSU) is below a first...
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7635970 |
Method for implementing radiation hardened, power efficient, non isolated low output voltage DC/DC converters with non-radiation hardened components
A method of producing an economical DC/DC converter that efficiently produces a relatively low output voltage and operates in a high ionizing radiation dose environment such as found in spacecraft...
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RE41037 |
Adjustable minimum peak inductor current level for burst mode in current-mode DC-DC regulators
Switching regulator circuits and methods are provided for regulating output voltage that include an adjustable minimum peak inductor current level for Burst Mode in current-mode DC-DC regulators....
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7626372 |
Control circuit for multi-phase, multi-channels PFC converter with variable switching frequency
A switching control circuit for multi-phases PFC converters is provided. It includes a PFC-control circuit coupled to receive a first-inductor signal and a feedback signal for generating a...
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7619908 |
Prognostic health monitoring in switch-mode power supplies with voltage regulation
The system includes a current injection device in electrical communication with the switch mode power supply. The current injection device is positioned to alter the initial, non-zero load current...
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7615983 |
High frequency power device for protecting an amplifying element therein
A high frequency power device includes a first oscillator outputting a first oscillating signal oscillated by a first predetermined frequency and a second oscillator outputting a second oscillating...
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7615974 |
High dimming ratio LED drive circuit
The invention relates to a method and an apparatus for controlling average current by pulse modulating an output current. The apparatus includes a constant-on-time switching regulator. During the...
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7615982 |
Power converter able to rapidly respond to fast changes in load current
According to an embodiment, in a DC/DC converter delivering current to load, a method is provided for rapidly responding to changes in load current. The method includes: detecting fast changes in...
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7615981 |
Boost converter with enhanced control capabilities of emulating an inductor current
A DC to DC converter for converting an input DC voltage to an output DC voltage. The DC to DC converter may include at least one switch, an inductor coupled to the at least one switch, and a...
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7616464 |
Reverse current control system for a power converter
A reverse current control system for first power converter having a synchronous rectifier and an output inductance includes a reverse current module. The reverse current module monitors a first...
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7612550 |
Dropper type regulator
A dropper type regulator of the invention, in which a semiconductor device is connected in series between a DC power supply and a voltage output terminal, extracts a second voltage from the first...
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7609043 |
Power array system and method
A method of sensing current comprises providing a current sensor having a gain resolution; setting the gain resolution of the current sensor to an initial resolution; sensing current flowing...
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7605575 |
Voltage-supply circuit and method for providing a circuit with a supply voltage
A current-supply circuit includes a regulation transistor. The regulation transistor is formed to regulate, based on a first supply voltage present on a first supply-voltage feed line, a second...
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7605576 |
Switching power supply device
This invention prevents undershoot, etc., occurring in the output during the transition from intermittent control mode to continuous control mode to hinder stability, responsiveness, and low power...
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7602167 |
Reconfigurable topology for switching and linear voltage regulators
A configurable voltage regulator ( 28; 128 ) operable in either of two selectable modes or topologies is disclosed. In one disclosed embodiment, the voltage regulator ( 28 ) can operate as a linear...
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7598718 |
Controller for DC to DC converter
A DC to DC converter to convert an input voltage to an output voltage. The DC to DC converter may include a pair of switches including a high side switch and a low side switch, an inductor coupled...
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7598715 |
Apparatus and method for reverse current correction for a switching regulator
A synchronous switching voltage regulator circuit is provided. After the first PWM pulse or at the end of a soft-start, a gradual transition is made from asynchronous rectification to fully...
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7595622 |
System and method for providing a sample and hold circuit for maintaining an output voltage of a constant current source circuit when a feedback loop is disconnected
A system and method are disclosed for maintaining an output voltage of a constant current source circuit. A constant current source circuit is provided that comprises a voltage regulator, a first...
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7595621 |
DC-DC converter control circuit and DC-DC converter control method
In a DC-to-DC converter control circuit and control method thereof, an arithmetic circuit for outputs an add-up signal generated by adding an output voltage signal obtained by adding an output...
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7592792 |
Power supply
There are provided an inductive load current control circuit for detecting and controlling a current flowing to an inductive load with high accuracy, and a power supply. The inductive load current...
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7592793 |
Voltage regulator providing power from AC power source
A high efficiency voltage regulator for generating a regulated output voltage from an AC power source is disclosed. It includes a switch coupled to a voltage source from the AC power source to...
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7589511 |
DC-DC voltage converter
A DC-DC voltage converter is provided that includes a plurality of power channels and a controller. Each power channel is configured to provide a voltage output to an output node of the converter....
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7589510 |
Voltage regulator having variable threshold voltage switch
A voltage regulator includes a power field effect transistor and a control-loop circuit. The power field effect transistor has a threshold voltage, a drain terminal receiving an input voltage, a...
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7589985 |
Switching Regulator
A switching regulator is configured as a fixed-voltage regulator and contains a voltage divider. The voltage divider is supplied with a voltage signal available from a regulator output via a first...
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7583069 |
Booster
A booster includes a booster circuit and a microcomputer. The booster circuit outputs an output voltage. The output voltage is obtained by boosting a power supply voltage. The microcomputer...
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7583068 |
Method for driving voltage-controlled devices or current-controlled devices
A multifunctional driver controller capable to drive one or more voltage-controlled devices or current-controlled devices is described. The multifunctional driver controller comprises a selection...
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7583066 |
Method of operating a DC/DC up/down converter
A method for an up-down converter which is based on a buck converter during the current down-conversion phase (Φ 2 , Φ 3 and Φ 5 , Φ 6 , respectively) of the coil (L 1 ) supplies an output (B)...
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7579819 |
Apparatus and method for flywheel current injection for a regulator
A constant on-time regulator that may use a capacitor with low ESR without needing a series resistor is provided. A capacitor is employed to AC-couple a current sense voltage into the reference...
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7580805 |
Programmable calibration circuit for power supply current sensing and droop loss compensation
A circuit for regulating power is disclosed. The present invention provides circuits and methods for current sensing variations, static droop settings, mismatched phase outputs, and temperature...
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7576529 |
Step-down type switching regulator
A pulse signal generating circuit generates a pulse signal having a duty ratio controlled such that the output voltage approaches a reference voltage. A driver circuit generates first and second...
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7576531 |
Switching regulator and electronic device therewith
A switching regulator according to the invention includes: an output switching element; an output feedback circuit generating an error voltage (Verr) according to an error between an output voltage...
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7576530 |
Switching regulator capable of efficient control at control mode change
A switching regulator includes a switching transistor to switch, an inductor to store charge from an input voltage, a comparator to compare a voltage at a connecting node of the switching...
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7570030 |
Boost converter circuit having selectable modes
The present invention relates to a boost converter which can operate both in a capacitive and in an inductive mode. In the capacitive mode the converter operates as a charge pump circuit by making...
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7570038 |
Control circuit to reduce reverse current of synchronous rectifier
A control circuit for a power converter receives a switching signal that is applied to charge an inductor of the power converter. The control circuit includes a predication circuit that generates a...
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7560917 |
Current feed-through adaptive voltage position control for a voltage regulator
In a voltage regulator including an error amplifier to generate a first signal related to an output voltage of the voltage regulator, a current sense circuit to generate a second signal related to...
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7557554 |
Voltage/current control apparatus and method
A voltage/current control apparatus and method are disclosed. The apparatus includes a low-side field effect transistor (FET) having a source, a gate and a drain, a high-side field effect...
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7557545 |
Electric power unit operating in continuous and discontinuous conduction modes and control method therefor
An electronic power unit includes first and second MOS transistors and a digital control circuit. The first MOS transistor applies a voltage to the load. The second MOS transistor remains on while...
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7557555 |
Method to determine an operating characteristic of a vehicle power converter
Measured or otherwise known operating characteristics of a DC/DC power converter are used to determine, without measuring, an operating characteristic of the DC/DC power converter.
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7558094 |
Control device for power conversion circuit
The control device for controlling a power conversion circuit having voltage-controlled type switching elements includes a control unit generating conduction control signals for controlling...
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7554311 |
Hybrid charge pump regulation
Techniques for reliably and efficiently generating an output voltage for use within an electronic device, such as a memory system, are disclosed. A voltage generation circuit generates the output...
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7548050 |
Switching power supply device and semiconductor integrated circuit
A capacitor is disposed between the output side and the ground potential of an inductor which creates an output voltage. A first switch element supplies a current from an input voltage to an input...
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7548048 |
Switching mode power supply and method for determining a compensation factor thereof
A switching mode power supply is configured to have two modes, a normal mode and a measure mode. To determine a compensation factor to compensate the switching mode power supply in the normal mode,...
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7545133 |
Power supply apparatus
In a power supply apparatus in which a source of a MOSFET is connected to a node of a rectifier diode and a choke coil through a resonance coil, a series circuit including a capacitor and a MOSFET...
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7545132 |
Sensor-less, low frequency adaptive current limiter and methods for limiting inductive current using the same
Devices and systems that use an adaptively limited PWM duty-cycle to control a circuit and methods and control programs to operate and to control the devices and systems to adaptively limit the PWM...
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7545134 |
Power supply controller and method therefor
In one embodiment, a power supply controller is configured to form a reference signal that has selectable values. The power supply controller is also configured to form a feed-forward signal in...
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7545131 |
Transient processing mechanism for power converters
Transient processing mechanisms for power converters. Error generation circuitry in a power converter may generate an error signal based on the difference between a power converter output voltage...
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7545129 |
Switching power supply circuit
A switching power supply circuit comprises: current detection means for detecting a current flowing through an inductor; current holding means for holding the current flowing through the inductor...
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7545130 |
Non-linear controller for switching power supply
Methods and systems for nonlinear control of switching power supplies.
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