Class / Patent application number | Description | Number of patent applications / Date published |
323286000 | Including filter sensing | 11 |
20090102447 | CONSTANT-ON-TIME POWER-SUPPLY CONTROLLER AND RELATED SYSTEM AND METHOD - A constant-on-time power-supply controller includes an adder and a control circuit. The adder generates a sum of a sense voltage and a regulated output voltage generated by a filter inductor. The sense voltage is generated by a sense circuit that sources a current to the filter inductor while the inductor is uncoupled from an input voltage, and the sense voltage is related to the current. The control circuit couples the filter inductor to the input voltage for a predetermined time in response to the sum having a predetermined relationship to a reference voltage. Such a power-supply controller may yield a relatively tight regulation of the output voltage even with a power supply having with a low-ESR filter capacitor, and may do so with little or no additional compensation circuitry as compared to prior controllers and with no additional pin on the power-supply-controller chip. | 04-23-2009 |
20090121697 | CIRCUIT AND METHOD FOR REDUCING OUTPUT NOISE OF REGULATOR - A circuit and a method for reducing output noise when a pulse width modulation mode is started. A pulse width modulation circuit generates a first pulse signal having a duty cycle that is in accordance with an output voltage of a regulator circuit. A drive circuit generates the output voltage from an input voltage in response to the first pulse signal provided from the pulse width modulation circuit. A feed forward circuit controls the pulse width modulation circuit in a manner to generate the first pulse signal having a duty cycle that maintains the output voltage at a desired level before the pulse width modulation circuit provides the first pulse signal to the drive circuit. | 05-14-2009 |
20100320990 | Low Heat Dissipation I/O Module Using Direct Drive Buck Converter - A current-loop output circuit for an industrial controller provides for low power dissipation and reduced part count by driving current loads of different resistances directly from a switched voltage source. Proper filtering and design of a feedback loop allows the necessary transient response times to be obtained. | 12-23-2010 |
20110101949 | Power Converter with Controller Operable in Selected Modes of Operation - A power converter and method of controlling the same for selected modes of operation. In one embodiment, the power converter includes a first power switch coupled to a source of electrical power and a second power switch coupled to the first power switch and to an output terminal of the power converter. The power converter also includes a controller configured to control an operation of the first and second power switches during selected modes of operation. | 05-05-2011 |
20120126773 | SWITCHING REGULATOR WITH BALANCED CONTROL CONFIGURATION WITH FILTERING AND REFERENCING TO ELIMINATE COMPENSATION - A switching regulator and controller and an electronic device using same are disclosed in which the controller includes a sense circuit, an error amplifier circuit, a filter and reference circuit, and a comparator circuit. The switching regulator includes a pulse switch circuit coupled to an output inductor for developing an output voltage. The sense circuit provides a sense signal indicative of current through the output inductor. The error amplifier circuit develops an error signal indicative of error of the output voltage. The filter and reference circuit high pass filters the sense signal to provide a filtered sense signal and which balances the filtered sense signal and the error signal at a common DC level. The comparator circuit develops a pulse control signal using the error signal and the filtered sense signal, where the pulse control signal is for controlling switching of the pulse switch circuit. | 05-24-2012 |
20120161740 | LOAD ADAPTIVE VOLTAGE REGULATOR - Methods and systems may involve detecting an output voltage of a voltage regulator and sensing an inductor current corresponding to a saturating output inductor of the voltage regulator. A switching frequency signal can be generated based on the inductor current, wherein the voltage regulator may be controlled based on the output voltage and the switching frequency signal. In one example, the switching frequency signal sets a first switching frequency if the inductor current is below a saturation current threshold, and sets a second switching frequency if the inductor current is below the saturation current threshold, wherein the second switching frequency is less than the first switching frequency. | 06-28-2012 |
20120194161 | INDUCTOR CURRENT MEASUREMENT FOR DC TO DC CONVERTERS - A system includes an estimation module and a current measuring module. The estimation module estimates current through an inductor in an output stage of a power supply using a model of the current and generates an estimated current. The current measuring module measures the current through the inductor and generates a measured current. The estimation module adjusts the model based on the measured current. | 08-02-2012 |
20130106384 | VOLTAGE CONVERTING CIRCUIT | 05-02-2013 |
20140132237 | DYNAMIC IMPEDANCE MATCHING FOR IMPROVED TRANSIENT PERFORMANCE IN A DIRECT CURRENT-TO-DIRECT CURRENT ('DC/DC') CONVERTER FOR DELIVERING A LOAD TO AN ELECTRICAL COMPONENT - A direct current-to-direct current (‘DC/DC’) converter for delivering a load to an electrical component, the DC/DC converter including: a coupled inductor, wherein the coupled inductor receives a source input voltage level and a outputs an output voltage level; a transient winding; and a variable impedance switch coupled to the transient winding, the variable impedance switch configured to operate by adjusting a delivered resistance level in dependence upon a change in the load to be delivered to the electrical component by the DC/DC converter. | 05-15-2014 |
20140292298 | Operational Amplifier-Based Current-Sensing Circuit for DC-DC Voltage Converters and The Like - In one embodiment, an integrated circuit comprising a current-sensing circuit having a power transistor and an amplifier. The current-sensing circuit is coupled to (i) sense a current supplied to a load by a voltage source through an inductor and (ii) generate an inductor-current signal based on the sensed current. The current-sensing circuit includes: a power transistor and a sensing transistor, both coupled to receive an input voltage from the voltage source. The error amplifier has first and second input nodes and an output node. The first input node receives (i) a first voltage through the power transistor and (ii) a first current from a first biasing-current source. The second input node receives (i) a second voltage through the sensing transistor and (ii) a second current from a second biasing-current source. The inductor-current signal is generated based on at least one of the first and second voltages, and the output node has a voltage that varies with the inductor-current signal. | 10-02-2014 |
323287000 | In flyback path | 1 |
20110057637 | BOUNDARY CONDUCTION MODE SWITCHING REGULATOR AND DRIVER CIRCUIT AND CONTROL METHOD THEREOF - The present invention discloses a boundary conduction mode (BCM) switching regulator, and a driver circuit and a control method of the switching regulator, for controlling a power stage to convert an input voltage to an output voltage or output current. The BCM switching regulator detects whether it is operating in continuous conduction mode (CCM) or discontinuous conduction mode (DCM), and adjusts the On-time, Off-time, or frequency of the power stage accordingly, so that the switching regulator operates in or near BCM. | 03-10-2011 |