Class / Patent application number | Description | Number of patent applications / Date published |
323222000 | Using choke and switch across source | 26 |
20080211465 | Soft-stop circuit and method for a voltage regulator - A soft-stop circuit and method are provided for a voltage regulator which converts a battery voltage to an output voltage according to a feedback voltage derived from the output voltage and a reference voltage, to control the voltage regulator to enter a soft-stop state when the battery voltage is lower than a threshold level, and in which state, and the output voltage is controlled to decrease so as for the battery voltage to have a slower decreasing speed and in turn a longer battery lifetime. | 09-04-2008 |
20080284387 | BIDIRECTIONAL NO LOAD CONTROL WITH OVERSHOOT PROTECTION - A method of operating an isolated bi-directional dc/dc converter to provide voltage regulation at a no-load condition over a wide voltage range and also provide overshoot protection for the boost mode main switching transistors uses new boost mode drive waveforms. The new waveforms drive switches S | 11-20-2008 |
20080290846 | Switching power supply - A switching power supply capable of correcting a power factor without using a shunt resistor is provided. The switching power supply includes a rectifier for rectifying an AC power supply, boosting means including a power MOSFET for boosting an output of the rectifier, a smoothing capacitor for smoothing an output of the boosting means, voltage-dividing resistors for detecting a voltage between main terminals of the power MOSFET, a switch for selecting only the voltage by which the power MOSFET is in on-state from voltages detected by the voltage-dividing resistors, an amplifier for amplifying the voltage selected by the switch and outputting the same as a current corresponding value of a current flowing in the power MOSFET, voltage-dividing resistors for detecting the output voltage, and driving means which form a pulse signal based on the current corresponding value and the output voltage for driving the power MOSFET by the pulse signal. | 11-27-2008 |
20080297122 | Advanced current-mode control for switched regulators - A voltage regulator includes an input connectable to a voltage source and an output connectable to a load. The voltage regulator includes an inductor coupled to the output, a switch between the input and the inductor, and a current control loop configured to control the duty cycle of the switch to regulate voltage at the output, wherein the duty cycle being based on both a peak and valley threshold level of current flowing through the inductor. | 12-04-2008 |
20080297123 | POWER LOSSES REDUCTION IN SWITCHING POWER CONVERTERS - Embodiments of the invention provide methods and apparatuses for concurrently eliminating or substantially reducing two or more switching losses in an inverter switching circuit. Embodiments of the invention concurrently reduce multiple types of switching losses under hard switching mode and soft switching mode for active switching devices and diodes. In one embodiment of the invention, the voltage across a switching device is substantially reduced during switch turn-off and/or turn-on time, and also maintained at a substantially reduced level throughout some or all of the tail current loss time of the switching device. The voltage reduction mechanism is implemented as a transformer circuit electrically serially implemented between the voltage source and the switching device. Other methods and apparatuses are also described. | 12-04-2008 |
20090085532 | DC-DC CONVERTER - A DC-DC converter providing a DC output voltage at an output node. The DC-DC converter comprises an output stage, a digital controller, and a controller. The output stage comprises a pull-up circuit having a control terminal and coupled between a first fixed voltage and a internal node, a pull-down circuit coupled between the internal node and a second fixed voltage, and a low pass filter coupled between the internal node and the output node. The digital controller is powered by the DC output voltage and adjusts the DC output voltage by controlling the output stage. The controller controls a connection of a feedback path, comprising the digital controller, between the output node and the control terminal according to the DC output voltage. | 04-02-2009 |
20090140703 | DC-DC CONVERTER - A DC-DC converter includes a charge pump unit and a clock pulse generator unit. The charge pump unit precharges a boost node in response to a precharge clock pulse and boosts the boost node to a boosted voltage in response to a pump clock pulse. The clock pulse generator unit generates the precharge clock pulse and the pump clock pulse in which corresponding pulse widths increase during multiple time intervals over time. | 06-04-2009 |
20090146620 | METHODS AND APPARATUS FOR CURRENT SENSING - Methods and apparatus for current sensing according to various aspects of the present invention operate in conjunction with a current sensor adapted to sense the current provided to a load via a transistor. In one embodiment, a power supply includes the current sensor, and supplies the current through a series combination of an inductor and the transistor. The current sensor is adapted to generate the inductor current signal according to a sensed current in the inductor, and may comprise a series combination of a first resistor and a second resistor. The resistive series combination is adapted to be connected in parallel to the series combination of the inductor and the transistor. | 06-11-2009 |
20090200995 | COMBINATION CONTINUOUS AND DISCONTINUOUS CONTROL OF A POWER REGULATOR - One embodiment of the invention includes a power regulator system. The system includes a switching system comprising at least one switch and an inductor, the switching system being configured to provide an output voltage based on a current through the inductor. The system also includes a switch driver configured to provide a switching signal to the switching system to control the operation of the at least one switch to provide the current through the at least one inductor. A mode controller is configured to switch the switch driver between a continuous mode of operation and a discontinuous mode of operation based on both a feedback voltage associated with the output voltage and at least one other predetermined operating condition associated with each of the continuous and discontinuous modes of operation. | 08-13-2009 |
20090237039 | METHOD OF CONTROLLING A DC-DC CONVERTOR IN DISCONTINUOUS MODE - A DC-DC converter includes an induction coil cooperating with two switches, which operate alternately, to supply output voltage of a determined level relative to input voltage. The converter control method includes, in each cycle, a first phase of first duration with first switch controlled to make it conductive, and to increase current in the induction coil, and a second phase with second switch controlled to be conductive and to decrease current in the induction coil during a second adjustable time period. Detection device detects, at the end of the second phase, sign of overvoltage across one terminal of the induction coil connected to the switches, and supplies a detection signal kept in a high or low state, depending upon sign of detected overvoltage. Timing device receives detection signal for adapting, in each successive cycle, the second duration of the second phase to cancel out current in the induction coil. | 09-24-2009 |
20090243562 | Bias Voltage Converter - A method of generating a bias voltage in a circuit, the circuit including an inductor element including a first inductor node and a second inductor node, the inductor element to output an inductor current, a first capacitor associated with the second inductor node, a diode provided between the first capacitor and the first inductor node, a second capacitor being associated with ground and the second inductor node, a trigger resistor, the trigger resistor including a first trigger node associated with a resistor—capacitor network and a second trigger node associated with the second capacitor node, a trigger node configured between the first capacitor and the second capacitor node, a resistor—capacitor network associated with the trigger, and a switch associated with the resistor—capacitor network and the second inductor node. The method includes charging the first capacitor and the trigger capacitor when the first inductor node is at 0V and the second inductor node is at an input voltage. The switch is opened so that the inductor current continues to flow to output while the inductor current and trigger current stop charging. The switch is closed upon receiving a negative voltage step at the trigger node. | 10-01-2009 |
20090267573 | Power Supplies, Power Supply Controllers, And Power Supply Controlling Methods - A power supply controller is provided. The power supply controller includes a switching device, an inductor, a comparator, and a sensing device. The switching device is coupled to an input power source and switches according to a comparing result. The inductor is coupled between the switching device and an output terminal, and conducts an inductor current. The comparator is coupled to the output terminal, a reference power source and a bias voltage, compares the voltage level of the output voltage and the reference voltage, and outputs the comparing result according to the bias voltage. The sensing device is coupled to the inductor and the comparator, senses the inductor current, generates a sensed voltage according to the inductor current, and adjusts the bias voltage according to the sensed voltage. | 10-29-2009 |
20090284235 | Adaptive Compensation Scheme for LC Circuits In Feedback Loops - A method for providing adaptive compensation for an electrical circuit where the electrical circuit includes an inductor-capacitor network connected in a feedback loop being compensated by a first compensation capacitance value and a second compensation capacitance value defining the frequency locations of two compensation zeros includes: measuring the inductance value of the inductor; when the inductance value is greater than a first threshold value, increasing the first and second compensation capacitance values so that the frequency locations of the two compensation zeros are adjusted for compensating the poles introduced by the first inductor and the first capacitor; and when the inductance value is less than the first threshold value, decreasing the first and second compensation capacitance values so that the frequency locations of the two compensation zeros are adjusted for compensating the poles introduced by the first inductor and the first capacitor. | 11-19-2009 |
20090295341 | DC-DC CONVERTER - A DC-DC converter includes a high side transistor and a low side transistor connected in series between an input potential and a grounding potential, and an LC filter connected between a connection point of the both transistors and an output terminal. A control unit controls the gate potential of the high side transistor in an ON state and the gate potential of the low side transistor in an ON state according to a magnitude of a current output from the output terminal. | 12-03-2009 |
20100045245 | Control Method for DC/DC Converters and Switching Regulators - A circuit for controlling a switching regulator includes a switching control circuit configured to operate one or more switches in a repeating sequence that includes a first state in which an inductor is coupled between an input supply and a load so that an increasing current passes from the input supply through the inductor and a second state in which the inductor is coupled between ground and the load so that a decreasing current passes through the inductor to the load; a circuit configured to cause the switching circuit to select the second state when the magnitude of the increasing current has reached a predetermined level; and a timing circuit configured to cause the switching circuit to select the second state for a predetermined period of time after the initiation of each second first. | 02-25-2010 |
20100109617 | CURRENT-LIMITING CIRCUIT AND METHOD FOR OPERATING THE CIRCUIT - A current-limiting circuit for limiting switch-on currents or transients includes a switch, a diode, an inductance, an input with a first connection and second connection, and an output with a first connection and second connection. The second connection of the input is connected via the switch to the junction of an inductance and the anode of a diode and via the inductance to the second connection of the output. The cathode of the diode is connected to the first connection of the input and to the first connection of the output. The switch is preferably an electronic switch controlled to provide clocked current limitation. | 05-06-2010 |
20100127672 | Power Supply Device with Fast Output Voltage Switching Capability - A power supply device is disclosed in the present invention, which includes a DC-DC boost converter and a charge recycling circuit. The DC-DC boost converter is utilized for boosting an input voltage to generate an output voltage, and adjusting a voltage level of the output voltage according to a level switching signal. The charge recycling circuit is electrically connected to the DC-DC boost converter, and is utilized for generating a current path according to the level switching signal to recycle redundant charges from the DC-DC boost converter when the output voltage is switched from high to low and to return stored charges back to the DC-DC boost converter when the output voltage is switched from low to high, so as to accelerate voltage switching of the output voltage and to reduce power consumption of the DC-DC boost converter. | 05-27-2010 |
20100188056 | Energy efficient method for changing the voltage of a DC source to another voltage in order to supply a load that requires a different voltage - A system and method of use for a DC-DC conversion wherein a DC supply at one voltage is converted to a DC supply at another voltage. The DC-DC converter uses a switching circuit with a broadband transmission line transformer to change the impedance level between a square-wave generator and a [square-wave]-to-DC converter. The transformer transforms generator characteristic impedance into load characteristic impedance. The method also transforms a DC source voltage into another DC load voltage. | 07-29-2010 |
20100277138 | PULSE POWER SUPPLY DEVICE - In order to provide a pulse power supply device using regenerating magnetic energy stored in a discharge circuit to a capacitor so as to use it as next discharge energy and supplying a bipolar pulse current with high repetition, a bridge circuit is composed of four inverse-conductive semiconductor switches, a charged energy source capacitor is connected to a DC terminal of the bridge circuit, and an inductive load is connected to its AC terminal. A control signal is supplied to gates of the inverse-conductive semiconductor switches, and a control is made so that when a discharge current rises, is maintained or is reduced, all the gates are turned off, and the magnetic energy of the electric current can be automatically regenerated to the energy source capacitor by a diode function of the switches. Further, a large-current power supply is inserted into a discharge circuit so as to replenish energy loss due to discharge, thereby enabling high-repetition discharge. | 11-04-2010 |
20100320974 | ADJUSTABLE CURRENT LIMIT SWITCHING REGULATOR WITH CONSTANT LOOP GAIN - A switching regulator is configured to provide a regulated voltage to a load while maintaining a substantially maximum output current limit, the switching regulator having a loop gain. In accordance with one aspect the switching regulator comprises: a circuit for adjusting the maximum output current limit in response to a programmable signal independently of the loop gain. In accordance with another aspect, the switching regulator comprises: a resistance sensing element for providing the current output of the regulator, and having a resistance which varies with temperature; and a circuit for maintaining the output current limit at a level independent of the temperature of the sensing element. In addition, in accordance with one aspect, a method of providing a regulated voltage to a load is disclosed in which a substantially maximum output current limit of a switching regulator is maintained. In one aspect the method comprises: adjusting the maximum output current limit in response to a programmable signal independently of the loop gain. In accordance with a second aspect, the method comprises: maintaining the output current limit at a level independent of the temperature of the sensing element and a constant transient response to load perturbations as a function of temperature and current limit setting. | 12-23-2010 |
20110127972 | SEQUENTIAL SWITCHING SHUNT REGULATOR CELL WITH NON-REDUNDANT RECTIFIER - A sequential switching shunt regulator cell comprising: a power line (PL) for connecting a power source (SA) to a power bus (PB); a shunting (SSW) switch for shunting said power line; and driving means (DM) for opening or closing said shunting switch depending on an error signal (MEA) indicative of a voltage level of said power bus; characterized in that it also comprises: a non-redundant rectifier (D | 06-02-2011 |
20110181251 | Alternative Switch Power Circuitry Systems - Reliability enhanced systems are shown where an short-lived electrolytic capacitor can be replaced by a much smaller, perhaps film type, longer-lived capacitor to be implemented in circuits for power factor correction, solar power conversion, or otherwise to achieve DC voltage smoothing with circuitry that has solar photovoltaic source ( | 07-28-2011 |
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. A rectifier diode is provided in the conduction path to face toward the electrolytic capacitor. An inductor is provided in the conduction path to be connected in series with the rectifier diode. A high speed diode has a reverse recovery time shorter than the reverse recovery time of the rectifier diode, and is connected in parallel with the inductor to face toward the electrolytic capacitor. | 10-03-2013 |
20130265015 | BOOST CONVERTER WITH INTEGRATED HIGH POWER DISCRETE FET AND LOW VOLTAGE CONTROLLER - A boost converter for high power and high output voltage applications includes a low voltage controller integrated circuit and a high voltage, vertical, discrete field effect transistor. The low voltage controller integrated circuit and the high voltage, vertical, discrete field effect transistor are packaged together in a single package on a common electrically conductive die pad, wherein the controller IC is attached to the die pad using insulating adhesive and the FET is attached to the die pad using conductive adhesive. | 10-10-2013 |
20140266084 | DC-DC CONVERTER - A DC-DC converter, having an output voltage and including at least one electronic switch: first circuitry controlling the output voltage by adjusting a switching frequency of the electronic switch, and second circuitry adjusting the switching frequency toward a target switching frequency when the switching frequency significantly deviates from the target switching frequency. | 09-18-2014 |
20140333269 | System And Method For Sinking Excess Current And Creating A Biasing Voltage - Data may be encoded onto a direct current power line by modulating the current on that direct current power line. One method of modulating the current is by placing an inductor on the power line and then using a controlled transistor that turns on and turns off. The inductor will ensure that current keeps flowing but the transistor will induce changes in the current pattern. The excess current from when transistor is turned off must be diverted. Furthermore, to create symmetrical current changes, the inductor should be reverse biased. Thus, a circuit is created that sinks the excess current from when the transistor is turned off and used to reverse bias the inductor. | 11-13-2014 |