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| Number | Title | Issue Date |
| RE43414 | Synthetic ripple regulator A synthetic ripple regulator including a synthetic ripple voltage generator that generates a synthetic ripple voltage indicative of the ripple current through an output inductor. The regulator uses the synthetically generated ripple voltage to control toggling of a ... | 05/29/2012 |
| 8148967 | PWM clock generation system and method to improve transient response of a voltage regulator A pulse control clock generator for a voltage regulator including a comparator, a window circuit, a filter circuit, a ramp circuit, and a current circuit. The comparator compares a ramp voltage with a compensation voltage and provides a corresponding pulse control s... | 04/03/2012 |
| 8138740 | Non-linear compensation ramp for current mode pulse width modulation A current mode direct current-to-direct current (DC-to-DC) voltage regulator controls its output voltage using a pulse width modulation (PWM) circuit that employs a non-linear compensation ramp. By employing such a PWM circuit, the output voltage can be controlled m... | 03/20/2012 |
| 8129974 | Systems and methods for self-recycling power A power system includes a switch, a capacitor and a comparator circuit. The power system receives a signal to turn off power supplied to the power system, turns off the switch that is used to supply power to the system and discharges the capacitor. The power system ... | 03/06/2012 |
| 8129975 | Synchronous rectifying DC-DC converter There is provided a dead time control method capable of recognizing a critical situation in which a commutating transistor cannot be turned on because of a temporary variation in an output voltage of a synchronous rectifying DC-DC converter and adaptively preventing... | 03/06/2012 |
| 8080987 | Method and apparatus for efficient transitioning between different operating modes of a regulator A modulator circuit for a switching regulator including first and second ramp generators, a comparator circuit and a reset circuit. The switching regulator provides a compensation voltage indicative of output voltage error. The ramp generators generate leading- and ... | 12/20/2011 |
| 8063622 | Method and apparatus for implementing slew rate control using bypass capacitor A circuit to control the slew rate of charging a capacitance using the capacitance is disclosed. An example circuit includes a regulator circuit to regulate a supply voltage during a normal operation mode of the circuit. A capacitance circuit is coupled to the regul... | 11/22/2011 |
| 8058861 | Miniature high-voltage power supplies The present invention provides a system comprising a high-voltage capacitive device and a power circuit electrically coupled to the capacitive device, wherein the power circuit is configured for stepping up a lower DC source voltage to a higher DC output voltage, wh... | 11/15/2011 |
| 8044651 | Efficient PWM controller This patent discloses an efficient PWM controller for generating a pulse signal in response to a feedback signal, capable of operating in a normal mode or a green mode, comprising: a capacitor for building a saw-tooth signal by current integration, the saw-tooth sig... | 10/25/2011 |
| 8040122 | Duty feed forward method and apparatus for modulating a duty of a PWM signal and power converting method and power converter using the same The duty of a PWM signal in a power converter is extracted to feed forward to modulate the slope of a linear oscillating ramp signal or the voltage level of an error signal, so as to modulate the duty of the PWM signal, by which the transient response of the power c... | 10/18/2011 |
| 8018216 | Power supply voltage booster A power supply voltage booster avoids inadequate step-up capability. In a voltage boosting circuit, a switching device connects and disconnects between the ground potential and one end of the coil, the other end of which is supplied with a supply voltage VB. The swi... | 09/13/2011 |
| 8018217 | PWM power converter using a multi-slope ramp signal to improve the transient response thereof A ramp generator is provided to provide a multi-slope ramp signal for a PWM power converter. The ramp generator determines the slope turning points for the multi-slope ramp signal according to the error signal of the PWM power converter and thereby improve the trans... | 09/13/2011 |
| 8013586 | Synchronous rectifier having precise on/off switching times A synchronous rectifier, including an energy storage element having a terminal; a power supply input, connected to the terminal of the storage element in a first time interval; a reference line connected to the terminal of the storage element in a second time interv... | 09/06/2011 |
| 8008903 | Method and apparatus for regulating a diode conduction duty cycle An example power converter includes a clock signal generator coupled to generate a clock signal to control switching of a power switch to be coupled to the control circuit. Feedback circuitry is coupled to receive a feedback signal, which is representative of an out... | 08/30/2011 |
| 7973524 | Mixed mode digital control for switching regulator A regulated power supply includes an inverter comprising an upper switch and a lower switch that are connected in series. A control module selectively controls the upper switch and the lower switch in one of a pulse width modulation (PWM) mode and a discrete control... | 07/05/2011 |
| 7965071 | DC-DC boost converter A DC-DC boost converter is provided that generally maintains discontinuous mode operation in a generally efficient manner. To accomplish this, a clamp generator, comparator, logic gates, a flip-flop, and counter are employed. These components generally operate toget... | 06/21/2011 |
| 7932710 | Step-up circuit and step-up circuit device A step-up circuit comprises a rectifier element 11 provided on a current path from a terminal VCC applied with a voltage source voltage VCC to a terminal VP connected to one electrode of a capacitor C1 such that a direction from the terminal VCC toward... | 04/26/2011 |
| 7928715 | Switching regulator Provided is a switching regulator which is capable of reducing soft start time when being activated, and prolonging battery life. The switching regulator has a configuration in which a clamp circuit for clamping a reference voltage is provided in a soft start circui... | 04/19/2011 |
| 7906953 | Boosting technique for a bi-directional switch in a power converter A bi-directional switch for a power converter comprises first and second transistors (SW1, SW2) and a floating supply capacitor (C2) associated with the second transistor (SW2). The drive circuit and/or gate of the first transistor (SW... | 03/15/2011 |
| 7902807 | Multiple switch node power converter control scheme that avoids switching sub-harmonics A method of and system for modulating buck and boost modulation ramps of a multiple switch node power converter without overlap. As the pulse width or duty cycle of the signal to a modulated complementary switching pair approaches a pre-established reference pulse w... | 03/08/2011 |
| 7902806 | Load control unit A load control unit for controlling the supply of an electric power to a load from battery in accordance with a pulse-width modulation control includes: a reference voltage generating unit; a first charging/discharging unit; a second charging/discharging unit connec... | 03/08/2011 |
| 7880458 | Method and device for driving power converters A device and method for driving a converter circuit that supplies a charge via a first electronic switch and a second electronic switch alternately turned on and off. A generator module generates a memory signal, indicating the duration of a first dead-time interval... | 02/01/2011 |
| 7821244 | Apparatus and method for charge storage and recovery for variable output voltage regulators A circuit for voltage regulation is provided. The circuit includes a variable output voltage regulator and an output capacitor circuit. The output capacitor circuit includes at least two output capacitors and at least one switch. The variable output voltage regulato... | 10/26/2010 |
| 7816901 | PWM modulator for scalable converters A PWM modulator for generating a PWM control signal for operating transistor switches of a phase of a multi-phase converter including a plurality of ramp generators, each ramp generator receiving a dedicated clock input signal corresponding to a phase of the multi-p... | 10/19/2010 |
| 7782039 | Mixed mode digital control for switching regulator A regulated power supply includes an inverter comprising an upper switch and a lower switch that are connected in series. A control module selectively controls the upper switch and the lower switch in one of a pulse width modulation (PWM) mode and a discrete control... | 08/24/2010 |
| 7777474 | DC-DC converter with oscillator and monitoring function A DC-DC converter for converting an input voltage and generating an output voltage. The DC-DC converter includes an adjustment resistor. A control circuit generates a control signal and includes an external terminal to which the adjustment resistor is externally con... | 08/17/2010 |
| 7746049 | Power supply device and recording apparatus A power supply device includes a DC-DC converter configured to regulate an output voltage based on an externally input instruction, and a discharge circuit connected to an output capacitor of the DC-DC converter, wherein the discharge circuit includes a switch eleme... | 06/29/2010 |
| 7741827 | Parameter control circuit including charging and discharging current mirrors and method therefor In one embodiment, a single input terminal of a parameter control circuit is utilized to form two different parameters of the parameter control circuit. In another embodiment, the parameter control circuit can include charging and discharging current mirrors. ... | 06/22/2010 |
| 7728573 | DC-DC converter controller having optimized load transient response and method thereof A power supply controller (25) is configured to accurately adjust the value of an output voltage of a power supply system (10) responsively to the output voltage increasing to an undesirable value. The controller (25) accurately limits an upper ... | 06/01/2010 |
| 7714562 | Hysteretic switching regulator A switching regulator circuit including a high-side switch and a low-side switch; an inductor having a first terminal coupled to a common terminal between the high-side switch and the low-side switch, and a second terminal coupled to an output terminal of the switch... | 05/11/2010 |
| 7710095 | Power converter having PWM controller for maximum output power compensation A PWM controller compensates a maximum output power of a power converter having a power switch. The PWM controller includes an oscillator for generating a saw signal and a pulse signal, a power limiter coupled to the oscillator for generating a saw-limited signal in... | 05/04/2010 |
| 7701190 | Control circuit and method for a DC-to-DC converter to improve transient response thereof For a DC-to-DC converter including a plurality of channels for converting an input voltage to an output voltage, a control circuit comprises a load transient detector to detect the output voltage to provide a quick response signal. In a load transient, the quick res... | 04/20/2010 |
| 7696740 | EMI suppressing regulator A regulator circuit receives a power supply and provides a regulated power supply output suitable for integrated circuitry. It has a controllable current source circuit, a controller and a capacitor, such that an output of the controllable current source circuit can... | 04/13/2010 |
| 7683598 | Power supply circuit, power supply control circuit, and power supply control method A DC-DC converter and first and second bypass switch circuits are provided in parallel between an input pin and first and second output pins and operate in accordance with a combination of the voltage value of the input pin and the voltage value required for the fir... | 03/23/2010 |
| 7675281 | Time-based synchronous rectification in a power converter In one embodiment, in a power converter system having first and second switches connected in a half-bridge arrangement at a common node from which current flows through an inductor to a regulated output terminal, wherein the regulated output terminal is connectable ... | 03/09/2010 |
| 7656142 | Switching regulator with variable slope compensation Controlled compensation for a switching regulator is attained by detecting switching duty cycle of the switching regulator, developing a compensation signal having a time duration that is related to the detected switching duty cycle percentage, and generating a duty... | 02/02/2010 |
| 7656143 | DC-DC converter To present a DC-DC converter efficient in conversion and not requiring an external diode. The DC-DC converter includes a main NMOS transistor FET1 as a main switching device, a driver DVH1 for driving a gate terminal of the main NMOS transistor FET1... | 02/02/2010 |
| 7652463 | Power converter for compensating a maximum output power A power converter for compensating a maximum output power includes a power switch, a control circuit, an oscillator and a frequency modulator. The control circuit generates a PWM signal in response to the pulse signal generated by the oscillator. The frequency modul... | 01/26/2010 |
| 7638995 | Clocked ramp apparatus for voltage regulator softstart and method for softstarting voltage regulators Methods and apparatus for softstarting a voltage regulation circuit. A circuit for generating an output voltage at an output thereof includes a capacitor having a first terminal configured to be coupled to a reference potential and having a second terminal coupled t... | 12/29/2009 |
| 7615984 | DC-DC converter and method of controlling thereof A DC-DC converter can prevent intermittent failure of a PWM or driving signal (VM) when a load becomes light and prevent generation of unusual noise from a transformer. The converter includes a transformer (2) having a primary winding (2a... | 11/10/2009 |
