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7619400 |
Compact voltage step-up/step-down switching regulator
This patent specification describes a switching regulator which includes a step-up/step-down unit configured to generate an output voltage by stepping up or down an input voltage in accordance with...
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7619395 |
End-point prediction scheme for voltage regulators
An End-Point Prediction scheme is described for voltage-mode buck regulators to generate adaptive output voltage to integrated-circuit systems. Internal nodal voltages of the regulator controller...
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7615973 |
Adder and current mode switching regulator
Provided is an adder in which all of circuits can be constituted by CMOS transistors, a process is simplified, and a chip size can be reduced as compared with a conventional art. The adder...
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7609036 |
Control device for a switching converter and related switching converter
A control device for a switching converter having an input terminal, an output terminal, a semi-bridge of a first and second transistor coupled between the input terminal and a reference voltage,...
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7599484 |
Element management system for managing line-powered network elements
A method of managing power at an element management system for a power sourcing network element and a power sinking network element of an access network is provided. The method includes identifying...
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7596006 |
Reducing output ripple from a switched mode power converter
The present invention pertains to a switching regulator having two inductors that discharge stored energy during the switching operation to an output capacitor, which integrates the pulses and...
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7595618 |
DC voltage converter with a detector circuit configured to distinguish between operating modes
A DC voltage converter is provided that cyclically converts an input-side supply voltage into an output voltage, and includes an inductive storage element connected between a supply voltage...
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RE40915 |
Programmable current-sensing circuit providing continuous temperature compensation for DC-DC converter
A current-sensing and correction circuit having programmable temperature compensation circuitry that is incorporated into a pulse width modulation controller of a buck mode DC—DC converter. The...
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7586294 |
Current resonance type DC/DC converter actualizing a stable zero-current switching
In a current resonance type DC/DC converter for converting an input voltage into an output voltage, a control circuit has an edge detection circuit for detecting edges of a driving control signal...
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7579817 |
Constant-voltage circuit capable of reducing time required for starting, semiconductor apparatus including constant-voltage circuit, and control method of constant-voltage circuit
A constant-voltage circuit includes a switching regulator and a series regulator each configured to start operating according to a selection signal input from outside the integrated circuit for...
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7570033 |
Apparatus and method for PWM buck-or-boost converter with smooth transition between modes
A PWM buck-or-boost converter is provided. The converter includes an error amplifier, a rectifier/splitter, a first comparator, and a second comparator. The rectifier/splitter provides two signals...
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7570032 |
Regulator with integrator in feedback signal
A control device for a switching converter has an input terminal and an output terminal; the converter includes a half-bridge of a first and a second transistor coupled between the input terminal...
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7570031 |
Method and apparatus for preventing multiple attempted firings of a semiconductor switch in a load control device
A two-wire load control device, such as a dimmer, is operable to control the amount of power delivered to an electrical load, such as a magnetic low-voltage (MLV) load, and comprises a...
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7531993 |
Half bridge circuit and method of operating a half bridge circuit
A half bridge circuit has a first switch having at least one control gate and a second switch having at least two control gates. A first driver has an output connected to a control gate of the...
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7528588 |
Method and circuit for limiting output voltage in a switched-mode power supply and a switched-mode power supply
A switched-mode power supply ( 200, 300, 400 ) comprises a primary side, a secondary side and a transformer ( 103, 303, 403 ) therebetween. An output on the secondary side delivers an output...
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7508175 |
System and method for reducing body diode conduction
A circuit for minimizing the effect of a parasitic body diode by combining a power electronics switching circuit with a pinch-off switch and a delay function.
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7504812 |
Transient behavior while switching between control loops in a switching voltage regulator
A voltage switching regulator includes a pulsewidth modulation (PWM) controller providing voltage regulation when the voltage switching regulator is experiencing being in an high-power mode. A...
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7501801 |
Power supply output voltage trimming
A power supply trim control signal is produced by integrating differences between monitored and target values of the output voltage of a power supply. Register storage requirements are reduced by...
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7498791 |
Reverse current preventing circuit and method
A synchronous switching voltage converter has a first switch, a second switch, and an inductor, which are all coupled together to a switch node. A reverse current preventing circuit has a current...
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7492138 |
Synchronous rectifier circuits and method for utilizing common source inductance of the synchronous FET
A method of improving the operation of a synchronous rectifier circuit which includes a switching transistor and synchronous transistor, by providing an operatively effective value of inductance in...
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7492132 |
Switching regulator
The present invention provides a switching regulator having good stability compatible with a good response and an enhanced protection function. A first capacitor is placed between an output end of...
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7489118 |
Method and apparatus for high-efficiency DC stabilized power supply capable of effectively reducing noises and ripples
Methods and apparatuses for generating DC stabilized power are described. A DC stabilized power supply apparatus includes a voltage switching control circuit and first and second power supply...
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7489117 |
Dynamic conversion circuit for a voltage regulator module
The invention relates to a dynamic conversion circuit for improving the transient response of a switching DC-DC converter, such as in a voltage regulator module (VRM). The dynamic conversion...
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7482795 |
Pre-bias protection circuit for converter
A pre-bias protection circuit for a converter circuit including a switching stage having high-and low-side switches connected in series at a switching node and an output stage connected to the...
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7482792 |
IC with fully integrated DC-to-DC power converter
In general, in one aspect, the disclosure describes a semiconductor device that includes a functional circuit and a dc-to-dc power converter. The power converter converts, regulates, and filters a...
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7482789 |
Step-up converter
A step-up converter includes an inductor which receives input voltage Vi at one end, a first FET of the first conduction type which functions as a switch for determining whether or not energy is...
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7482788 |
Buck converter for both full load and light load operations
A high efficiency buck converter has power-saving means to improve the efficiency under both heavy load and light load conditions. A first circuit generates an oscillation signal and a power-saving...
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7482765 |
Lighting control apparatus of lighting device for vehicle
When a forward direction voltage of any of several LEDs 14 to 20 is lowered, a drain voltage of an NMOS transistor 70 employed in any of series regulators 24 to 30 becomes higher than a...
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7479773 |
Synchronous rectification switching regulator and switching method
A synchronous rectification switching regulator includes a reverse current prevention circuit unit that detects a symptom of a reverse current flowing in a direction from an output terminal to a...
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7479768 |
System and method for providing variable gain loop control for use in adaptive voltage scaling
A system and method is disclosed for providing efficient closed loop feedback control in an adaptive voltage scaling system. The closed loop feedback circuitry of the invention comprises variable...
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7466111 |
Power supply unit and portable apparatus utilizing the same
An input source voltage is supplied from a battery for example to a switching power supply circuit such as a switching DC-DC converter via a series regulator for stepping down the input source...
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7466037 |
Power supply control circuit
A power supply control circuit is disclosed. The power supply control circuit controls a current which is supplied from a power source to a load. The power supply control circuit includes a reverse...
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7456622 |
Circuit for starting up a synchronous step-up DC/DC converter and the method thereof
The low voltage circuit for starting up a synchronous step-up DC/DC converter, which connects to a voltage source through an inductor, includes a P-type power transistor, an N-type power transistor...
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7443146 |
Auxiliary turn-on mechanism for reducing conduction loss in body-diode of low side MOSFET of coupled-inductor DC-DC converter
Conduction loss in the body-diode of a low side MOSFET of a power switching stage of one phase of a coupled-inductor, multi-phase DC-DC converter circuit, associated with current flow in the output...
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7443145 |
Switching regulator
A switching regulator for generating a regulated output voltage comprises a charging switch, a network with a coil, a capacitor and a diode as well as a control to open and close the charging...
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7443144 |
Voltage regulation system comprising operating condition detection means
The invention relates to a system for generating an output voltage (Vout) from an input voltage (Vup), said system comprising:—regulation means (T 1 ) for regulating said output voltage (Vout) to...
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7441921 |
Backlight unit and method of driving the same
A backlight unit includes at least one cold cathode fluorescent lamp arranged at a lower end of a bottom cover, external electrode fluorescent lamps arranged on the bottom cover above the cold...
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7439716 |
DC-DC converter and method
A DC-DC converter and method for compensating for errors in the DC-DC converter. The DC-DC converter includes an inductor coupled for receiving a source of operating voltage through a plurality of...
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7436158 |
Low-gain current-mode voltage regulator
In a low-gain current-mode voltage regulator having a PWM comparator in response to the varying output voltage and inductor current of the voltage regulator to produce a PWM signal to regulate the...
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7436157 |
Device for preparing a supply voltage
A device for preparing a supply voltage contains an input for receiving the supply voltage and a voltage converter for transforming an input voltage present at an input of the voltage converter...
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7432688 |
Soft-transition controller of a synchronous converter
The present invention provides a soft-transition controller for use with a synchronous converter having primary and secondary rectifiers. In one embodiment, the soft-transition controller includes...
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7408329 |
Power supply unit for gas discharge processes
A method of generating an output DC voltage of a gas discharge process voltage supply unit, in which in a first voltage transformation stage a first DC voltage is transformed into a second DC...
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7402958 |
Display power partitioning
According to one embodiment of the present invention, a voltage regulator is disclosed. The voltage regulator includes a step-down portion to step down an input voltage to a desired voltage when...
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7394264 |
Device for non-dissipative measurement of the current in an inductor
The invention relates to a device for measuring current in an inductor and being connected in parallel with said inductor. The device includes a network in parallel with the inductor and connected...
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7388354 |
Methods and devices for low noise current source with dynamic power distribution
Systems and methods for increasing driver power dissipation efficiency in a low noise current supply utilizing a power supply and a voltage regulator to power an output current regulator. An analog...
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7385375 |
Control circuit for a depletion mode switch and method of operating the same
A control circuit for a power converter employing a depletion mode switch and a method of operating the same. In one embodiment, the control circuit includes a controller configured to control the...
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7383145 |
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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7372241 |
Apparatus and method for switching voltage regulation
A regulator is provided. The regulator includes a main switch, a synchronous switch, an inductor, a sample-and-hold circuit, a ramp generator, a PWM comparator, an error amplifier, and a current...
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7372238 |
Apparatus and method for step-down switching voltage regulation
A current mode PWM buck regulator is provided. The regulator includes a top-side transistor, a bottom-side transistor, an inductor, a sample-and-hold circuit, a ramp generator, a PWM comparator, an...
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7365525 |
Protection for switched step up/step down regulators
A four switch voltage converter is regulated for buck mode and boost mode under constant frequency valley-peak current mode control. Protection circuits are responsive to output voltage and...
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