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| Number | Title | Issue Date |
| 8188721 | Active pulse positioning modulator An adaptive pulse positioning modulator including a sense circuit which provides a compensation signal indicative of output voltage error, a filter circuit having an input receiving the compensation signal and an output providing an adjust signal, a leading ramp cir... | 05/29/2012 |
| 8183844 | Switching power source (Problem) To provide a switching power source having a stable negative voltage output. (Means for Solving the Problem) A switching power source according to the present invention comprises a switching power source controller including a soft start circuit; an output... | 05/22/2012 |
| 8183846 | Method and apparatus for controlling a DC/DC converter A control system including a DC/DC converter and a control module. The DC/DC converter includes a first inductor and a second inductor. The DC/DC converter is configured to i) receive a first DC voltage and ii) output a second DC voltage. The control module is confi... | 05/22/2012 |
| 8183845 | Low voltage power supply A buck regulator for converting an input DC voltage, V+, into an output DC voltage level includes a coupled inductor for outputting the DC voltage level, and an error amplifier for sensing an error in the outputted DC voltage level and a pulse width modul... | 05/22/2012 |
| 8183847 | DC-DC converter controller having optimized load transient response In one embodiment, a power supply controller is configured to turn off a first output transistor but inhibit turning off a second output transistor. ... | 05/22/2012 |
| 8179109 | Methods and apparatus for a power supply with sequentially-activated segmented power switch Methods and apparatus for a power supply according various aspects of the present invention operate in conjunction with a voltage converter for converting an input voltage to an output voltage. For example, the converter may comprise a controller configured to gener... | 05/15/2012 |
| 8179110 | Adjustable constant current source with continuous conduction mode (“CCM”) and discontinuous conduction mode (“DCM”) operation A converter system and method of operating a converter system are disclosed. The converter system comprises a converter power stage that can operate in a Discontinuous Conduction Mode (DCM) in a range of output currents and a Continuous Conduction Mode (CCM) in anot... | 05/15/2012 |
| 8169205 | Control for regulator fast transient response and low EMI noise Methods and circuits for power supply arrangement and control are disclosed herein. In one embodiment, a switching regulator can include: (i) a filter network coupled to an output terminal, where an output voltage is generated at the output terminal from an input so... | 05/01/2012 |
| 8164316 | DC/DC converter A conventional DC/DC converter with both a step-up function and a step-down function has a drawback that its output voltage will be discontinuous when its operations are switched. An error signal, which is representative of a difference between a target voltage and ... | 04/24/2012 |
| 8148963 | Self-oscillating converter A converter has a main feedback path and two auxiliary feedback paths from an output node to an auxiliary differential input pair of a comparator. The auxiliary feedback paths have different RC time constants so that a differential ramp signal is effectively applied... | 04/03/2012 |
| 8148964 | Monolithic III-nitride power converter A power arrangement that includes a monolithically integrated III-nitride power stage having III-nitride power switches and III-nitride driver switches. ... | 04/03/2012 |
| 8143873 | Step-up switching power supply circuit A step-up switching power supply circuit is provided. Within a delay period immediately after start of operation, a switching element (SW2) is subjected to constant-current control by a switching control signal (E) of a constant-current source buffer circuit ... | 03/27/2012 |
| 8143871 | Dynamically-compensated controller A dynamically-compensated controller may generate a switching signal for a DC power supply. The controller may include a feedback circuit having a first analog-to-digital converter and a separate analyzer circuit for generating information indicative of performance ... | 03/27/2012 |
| 8143872 | Power regulator A power regulator for converting an input voltage to an output voltage includes a pass device, a reference signal circuit and an error amplifier. The pass device receives the input voltage and provides the output voltage at an output terminal of the power regulator.... | 03/27/2012 |
| 8138732 | DCR sense for a COT power converter A DCR sense scheme is provided to sense the inductor current of a COT power converter. The DCR sense is implemented by using the direct current resistance of the output inductor of the COT power converter, and thus eliminates the ESR limitations on the type of outpu... | 03/20/2012 |
| 8125205 | Power converter employing regulators with a coupled inductor A power converter includes a power train with a coupled inductor and a plurality of regulators, and method of forming and operating the same. In one embodiment, the power train includes a coupled inductor including a magnetic core with a common leg, a first leg and ... | 02/28/2012 |
| 8120342 | Current report in current mode switching regulation A voltage regulator includes a switch configured to alternately couple and decouple a voltage source through a inductor to a load, a feedback circuitry configured to generate a feedback current proportional to a difference between a desired voltage and an output vol... | 02/21/2012 |
| 8120341 | Switching power converter with switch control pulse width variability at low power demand levels A power control system includes a switch mode controller to control the switching mode of a switching power converter. The switch mode controller generates a switch control signal that controls conductivity of a switch of the switching power converter. Controlling c... | 02/21/2012 |
| 8120343 | Switching power supply and semiconductor device used for the same According to the present invention, it is possible to prevent an overcurrent from passing through a switching element 1 during overcurrent protection and reduce power consumption during standby while detecting an output voltage immediately after power-on and ... | 02/21/2012 |
| 8106639 | Feed forward control of switching regulator The invention relates to a switching regulator with an error amplifier circuit and a feed-forward circuit. The error amplifier circuit provides an error signal by amplifying the difference between a feedback signal and a reference signal. The feed-forward circuit le... | 01/31/2012 |
| 8106640 | Power supply control circuit, power supply device, power supply system, and method of controlling power supply control device A power supply control circuit detects a reference voltage VD corresponding to an intermediate voltage of a Hi Side FET and a Lo Side FET, when a short-circuit fault of the Lo Side FET is generated, and compares a threshold value VIN−VrefH and the reference voltag... | 01/31/2012 |
| 8102164 | Power factor correction converter control offset Power factor correction converter control offset apparatus and methods are disclosed. In one aspect, an apparatus includes a control unit to generate a control signal to control a duty cycle of a PWM (Pulse Width Modulation) switching signal that controls a switch i... | 01/24/2012 |
| 8098059 | Current negative-feedback circuit and DC-DC converter using the circuit A current negative-feedback circuit comprises a current detection unit and a sawtooth-shaped waveform generation unit. The current detection unit comprises a first P-ch MOSFET Q2 and a second P-ch MOSFET Q3 which constitute a current mirror circuit, a ... | 01/17/2012 |
| 8089255 | Power factor correction power supply unit, and control circuit and control method used in the same A power factor correction power supply unit for correcting a power factor includes a switching device, an input voltage detection circuit, an output voltage detection circuit, an error amplifier for outputting an error signal obtained by amplifying a difference betw... | 01/03/2012 |
| 8085020 | Switching voltage regulator employing dynamic voltage scaling with hysteretic comparator A switching voltage regulator is disclosed operable to regulate a voltage supplied to system circuitry. A comparator compares an oscillator signal generated by a ring oscillator to a reference signal generated by a frequency generator. Switching circuitry charges a ... | 12/27/2011 |
| 8085021 | PFC converter having two-level output voltage without voltage undershooting A switching controller for a PFC converter is provided. The switching controller comprises a switching-control circuit, a current-command circuit, a programmable feedback circuit, a modulator, an over-voltage detection circuit, and a light-load detection circuit. Th... | 12/27/2011 |
| 8085022 | Switching regulator and control circuit thereof, and method for determining on-time in switching regulator The present invention discloses a switching regulator and control method thereof, and a method for determining On-time in switching regulator. The switching regulator comprises: a power switch circuit including at least one power transistor switch which operates to ... | 12/27/2011 |
| 8080985 | Method and apparatus for high performance switch mode voltage regulators Circuit configurations for a high power switch-mode voltage regulator circuit is disclosed that include an array of Metal Oxide Semiconductor (MOS) switching transistors electrically coupled to one another at their drains and sources and a plurality of gate driver c... | 12/20/2011 |
| 8076916 | Power supply module A power supply module includes an inductor circuit, a switch circuit, a sensor circuit, and a controller. The inductor circuit includes an inductor and a voltage feedback wire returning the terminal voltage of the inductor. The switch circuit is electrically connect... | 12/13/2011 |
| 8076918 | Multi-phase driving circuit with phase adjusting function A multi-phase driving circuit includes a single-phase pulse-width modulation (PWM) controller, a number of drivers, and a number of switch circuits connected to the number of drivers correspondingly. The single-phase PWM controller is configured for providing a sing... | 12/13/2011 |
| 8076917 | Buck switching regulator with improved mode transition and control method thereof The present invention discloses a buck switching regulator with improved mode transition, and a method for controlling a buck switching regulator. The method comprises: providing a switching regulator including: an output power stage for converting an input voltage ... | 12/13/2011 |
| 8076880 | Motor control device A motor control device has a three-phase bridge circuit, a driving circuit, and a microcomputer. The three-phase bridge circuit has three pairs of MOSFETs for U, V, and W phases of a three-phase AC motor as a control target. The microcomputer has a dead time set val... | 12/13/2011 |
| 8072202 | Gate driver in buck converters A circuit comprising a gate driver including first and second switching stages for driving respective sync and control switches, at least one of which is a normally ON depletion mode device, and another circuit connected to the first and second switching stages and ... | 12/06/2011 |
| 8072199 | Control circuit for step-down DC-DC converter, step-down DC-DC converter and control method thereof To provide a control circuit of a step-down DC-DC converter, a step-down DC-DC converter and a control method thereof which can prevent overshoot and production of a through current flowing to a main switching transistor and a synchronous rectifier transistor by ado... | 12/06/2011 |
| 8072201 | Power supply apparatus In a power supply apparatus that is so configured as to produce from an input voltage an output voltage Vo within a predetermined permissible variation range, the output voltage Vo is so controlled as to decrease within the permissible variation range as the output ... | 12/06/2011 |
| 8072200 | AC and DC temperature compensation scheme for DCR current sense A current sensing circuit with AC and DC temperature compensation for sensing current through an output inductor which has an inherent DC resistor with a temperature varying resistance. A first RC circuit is coupled across the output inductor and has a time constant... | 12/06/2011 |
| 8067926 | Power supply for a load control device A power supply for a load control device generates a DC voltage and provides an asymmetrical output current, while drawing a substantially symmetrical input current. The power supply comprises a controllably conductive switching circuit for controllably charging an ... | 11/29/2011 |
| 8063618 | Supply voltage control based at least in part on power state of integrated circuit For one disclosed embodiment, switching voltage regulator circuitry may be controlled to supply a voltage to at least a portion of an integrated circuit. Information corresponding to a current load for a different power state of at least a portion of the integrated ... | 11/22/2011 |
| 8063619 | System and method for powering an information handling system in multiple power states Power is supplied to an information handling system chipset with a single voltage regulator having dual phases. A first phase of the voltage regulator provides power to a low power state power rail in an independent mode to support a low power state, such as a suspe... | 11/22/2011 |
| 8063620 | Switching power supply device and semiconductor integrated circuit The present invention provides a switching power source and a semiconductor integrated circuit which realize an acquisition a sufficient driving voltage of a high-potential side switching element M1 even when a power source voltage VDD is low. In a switching power s... | 11/22/2011 |
