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| Number | Title | Issue Date |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 8054056 | Frequency regulated hysteretic average current mode converter A switch mode power converter that precisely controls average switching current and operating frequency. The switching control operative in hysteretic average current mode control provides wide bandwidth operation without the need for slope correction. The switching... | 11/08/2011 |
| RE42897 | Current mode DC/DC converter with controlled output impedance A DC/DC converter has an output voltage and sources an output current to a load. The DC/DC converter includes an error amplifier with a reference input and a summing input. The reference input is electrically connected to a reference voltage. The summing input is el... | 11/08/2011 |
| 8054057 | Low dropout regulator testing system and device A device for testing low dropout (LDO) regulator is disclosed. In one embodiment, a device for testing LDO regulators includes an absolute value measurement module for measuring absolute output voltages of the LDO regulators including a resistor scaling array for ge... | 11/08/2011 |
| 8049478 | Switching regulator and method for eliminating beat oscillation The present invention discloses a switching regulator eliminating beat oscillation, comprising: a first transistor, a second transistor, and an inductor connected to a common node, wherein the first and second transistors operate to convert an input voltage to an ou... | 11/01/2011 |
| 8049479 | DC/DC converter package having separate logic and power ground terminals In a non-isolated DC/DC converter, a reference potential for a low-side pre-driver which drives a gate of a low-side MOSFET is applied from a portion except for a main circuit passing through a high-side MOSFET and the low-side MOSFET so that a parasitic inductance ... | 11/01/2011 |
| 8049477 | Apparatus and method for bias modulator using zero current switching An apparatus and a method for a bias modulator using a Zero Current Switching (ZCS) are provided. The bias modulator includes a Pulse Width Modulation (PWM) signal generator for converting an input envelope signal to a PWM signal; a PWM/ZCS converter for calculating... | 11/01/2011 |
| 8049476 | Method for changing an output voltage and circuit therefor A power supply and a method for compensating for a droop component in an output signal of the power supply. The power supply may include an error amplifier and an oscillator coupled to a pulse width modulation circuit. Outputs of the pulse width modulation circuit a... | 11/01/2011 |
| 8044648 | Start mode in switching regulation A voltage regulator is operated by, during a finite period of a voltage regular start mode having a plurality of current pulses, monotonically increasing the maximum current of the current pulses and a target voltage. ... | 10/25/2011 |
| 8040119 | Valley detecting circuit and method for a voltage across a switching device A valley detecting circuit and method are provided for a voltage across a switching device, which detect a voltage across the switching device to produce a first voltage proportional to the voltage across the switching device, clamp the first voltage to produce a se... | 10/18/2011 |
| 8035366 | Driving circuit of load A driving circuit of a load has an output semiconductor element connected in series in a power supply path from a power source to the load, to control a current of the load, a PWM signal generator for controlling ON/OFF of the output semiconductor element, a driver ... | 10/11/2011 |
| 8035363 | Procedure and a switching arrangement for triggering a load element using an electronic switching element in a load circuit A procedure for triggering a load element using an electronic switch element is presented, in which voltage on the load element is controlled with a maximum specified increase. The increase does not remain constant, but is controlled via the switching procedure in d... | 10/11/2011 |
| 8035365 | DC converter which has switching control unit to select PWM signal or PFM signal A DC (direct current) converter includes a PWM (pulse width modulation) pulse generation unit outputting a PWM pulse signal whose duty ratio is controlled in accordance with an output voltage, a PFM (pulse frequency modulation) pulse generation unit outputting a PFM... | 10/11/2011 |
| 8035364 | Step-down switching regulator with freewheeling diode A freewheeling DC/DC step-down converter includes a high-side MOSFET, an inductor and an output capacitor connected between the input voltage and ground. A freewheeling clamp, which includes a freewheeling MOSFET and diode, is connected across the inductor. When the... | 10/11/2011 |
| 8030910 | DC-DC converter A dual-mode switching voltage regulator has a duty cycle that varies with the input and output voltages so as to dynamically compensate for changes in the operating conditions. The switching voltage regulator uses input and output voltages/currents to optimize the d... | 10/04/2011 |
| 8026704 | System and method for controlling a converter A system and method for controlling a converter. One embodiment provides the cyclic actuation of a first switching element, used for applying an input voltage to an inductive storage element. A second switching element is used as a first rectifier element in a recti... | 09/27/2011 |
| 8026705 | Bootstrap circuit and bulk circuit thereof A bootstrap circuit is utilized in a bulk circuit using an NMOS transistor as a power switch. The bootstrap circuit includes a first PMOS transistor coupled between an internal power source and an offset capacitor, and a second PMOS transistor coupled between the ga... | 09/27/2011 |
| 8022680 | Switching DC-DC converter with adaptive-minimum-on-time control and method of adaptively controlling minimum-on-time of a switching DC-DC converter A power converter includes a power switch adapted to receive an input power from an external power source and to generate an output power, and an adaptive oscillator adapted to output an adaptive minimum-on signal of the power switch in response to a change in measu... | 09/20/2011 |
| 8018215 | Apparatus and method for monitoring the inductance value of a switching regulator A circuit for monitoring the inductance value of a switching regulator is provided. The circuit includes an inductance sensor circuit that is coupled to a switch node of a switching regulator. The inductor sensor circuit includes a switch, a ramp circuit, and a comp... | 09/13/2011 |
| 8013583 | Dynamic switch power converter The present invention provides a dynamic switch power conversion circuit to improve the efficiency of a solar cell array, and specifically to operate the solar cell array under various sunlight intensities, especially under low light conditions. In an embodiment of ... | 09/06/2011 |
