Patent application number | Description | Published |
20090295445 | DOUBLE-EDGE PWM CONTROLLER AND ITS CONTROL METHOD THEREOF - The present invention discloses a double-edge pulse width modulation (PWM) controller based on the output current and output voltage which is modulated in real time by the output current and the output voltage. The controller uses an extra first adder to sum up the compensation signal and a triangular signal (or a saw-tooth signal); a second adder to sum up the output current signal to a bias value; a PWM comparator, with its non-inverting input receiving the output of said first adder, its inverting input receiving the output of said second adder and outputs the PWM signal. | 12-03-2009 |
20100026271 | POWER CONVERTERS AND ASSOCIATED METHODS OF OPERATION - Power converters and associated methods of operation are disclosed herein. In one embodiment, a power converter includes a first switch and a second switch electrically coupled to the first switch in series. The first switch is electrically coupled to a first node and to a second node via the second switch. The power converter further includes a capacitor and a third switch electrically coupled to the first node and to the second node via the capacitor and the second switch. The third switch has a linear-active region of operation. | 02-04-2010 |
20100072970 | ADAPTIVE VOLTAGE POSITION DC-DC REGULATORS AND THE METHOD THEREOF - The present invention discloses an adaptive voltage position DC-DC regulator and the method thereof, the regulator comprising a main circuit and a control circuit which includes a sensing unit, a feedback unit, a comparing unit, a PWM generator and a driver. The regulator realizes the adaptive voltage position control with simple internal circuit and fewer pins. | 03-25-2010 |
20100134080 | ADAPTIVE CONSTANT ON-TIME SWITCHING REGULATOR - The present invention provides an adaptive constant on-time switching regulator which comprises a switching circuit, a control circuit, and an output circuit. The control circuit controls the switches in the switching circuit to be turned on for an adaptive constant time, and be turned off for a minimum time. | 06-03-2010 |
20100141222 | LOAD TRANSIENT SENSING CIRCUIT FOR A POWER CONVERTER - The present invention provides a circuit for sensing a load transient of a power converter. The circuit comprises an input terminal coupled to the voltage output terminal of the power converter through a resistor. The circuit further comprises a comparator for comparing an input voltage with a reference voltage to generate a load transient signal to control output voltage parameters of the power converter. The circuit has a simple circuit structure and can promptly sense the load transient of the power converter to thereby control various output parameters. | 06-10-2010 |
20100181983 | CONSTANT ON-TIME CONVERTER AND THE METHOD OF OPERATION - The present invention discloses a control circuit for constant on-time converter and a control method thereof. The proposed constant on-time DC/DC converter stabilizes the system and improves the performance of the load transient response without large equivalent series resistance of the output capacitor. | 07-22-2010 |
20120001603 | VOLTAGE REGULATOR WITH ADAPTIVE HYSTERETIC CONTROL - A voltage regulator with adaptive hysteretic control. The voltage regulator may include a top switch (e.g., MOSFET) configured to couple a power supply supplying an input voltage to a load. An adaptive hysteretic control circuit of the voltage regulator may turn on the top switch when the feedback voltage reaches the low threshold and turn off the top switch when the feedback voltage reaches the high threshold. The adaptive hysteretic control circuit may adjust the upper and lower threshold to make the voltage regulator working like a constant on time control circuit in steady state. When a step down transient happens, the top switch could be turned off when the output voltage reaches the upper threshold, and when a step up transient happens, the top switch could be turned on when the output voltage reaches the lower threshold, it makes the voltage regulator working like a hysteretic control circuit. | 01-05-2012 |
20120146606 | Constant On-Time Converter with Stabilizing Operation and Method Thereof - The embodiments of the present invention disclose a constant on-time converter with stabilizing operation and a control method thereof. The converter may comprise an input terminal, an output terminal, a feedback circuit, an operating circuit, a comparison circuit, a timer, a driving circuit and a switching circuit. The operating circuit may be coupled to a compensation signal adjusted by a digital controller. | 06-14-2012 |
20120274293 | MULTIPHASE CONVERTER WITH CONTROLLABLE PHASE SHIFT - In one embodiment, a multiphase converter is disclosed. The multiphase converter may comprise a plurality of phase circuits and a plurality of phase control circuits. Each phase circuit may comprise a switch having a control terminal, and the control terminal of the switch may be configured to receive a drive signal. Each phase control circuit may be corresponding to one of the phase circuits, and each phase control circuit may be configured to provide a phase control signal to adjust an ON-time period or a reference signal for the corresponding phase circuit. The phase control signal may be responsive to the drive signal of the corresponding phase circuit. | 11-01-2012 |
20130038301 | CONVERTER CIRCUIT AND ASSOCIATED METHOD - A converter control circuit for converting an input voltage to an output voltage comprises: an error amplifier, coupled to an output voltage or a feedback output signal from the output voltage, and a reference signal, operable to generate an error signal accordingly; a ramp signal generator, generating a first ramp signal and a second ramp signal; a first comparator, coupled to the error signal and the first ramp signal, operable to generate a first comparing signal accordingly; a second comparator, coupled to the error signal and the second ramp signal, operable to generate a second comparing signal accordingly; and a control signal generator, coupled to the first comparing signal and the second comparing signal, operable to generate a control signal to turn switches in the converter circuit ON and OFF accordingly. | 02-14-2013 |
20130038316 | POWER LOSS CONTROL METHOD FOR METAL-OXIDE-SEMICONDUCTOR UNIT AND ASSOCIATED APPARATUS - A power loss control method comprises detecting a load condition of the MOS unit, and adjusting driving loss of the MOS unit based on the load condition. The driving loss of the MOS unit is configured to decrease when the MOS unit is at light load condition. | 02-14-2013 |
20130257399 | CONSTANT ON-TIME SWITCHING CONVERTER AND CONTROL METHOD THEREOF - A controller used in a switching converter. The switching converter includes a switching circuit having at least one switch. The controller comprises an on-time control circuit generating an on-time control signal, a slope compensation circuit generating a slope compensation signal, a comparing circuit, a logic circuit and a load detection circuit. The comparing circuit generates a comparison signal based on the slope compensation signal, a reference signal and the output voltage of the switching circuit. The logic circuit generates a control signal to control the ON and OFF switching of the at least one switch based on the on-time control signal and the comparison signal. The load detection circuit detects the load condition. The slope compensation circuit adjusts the slope compensation signal based on the load condition. | 10-03-2013 |
20130307498 | MULTI-PHASE SWITCHING CONVERTER AND CONTROL METHOD THEREOF - A multi-phase switching converter comprising a plurality of switching circuits, a comparing circuit and a control circuit. The comparing circuit generates a comparison signal based on a reference signal and the output voltage of the multi-phase switching converter. The control circuit can turn on the following switching circuit based on the comparison signal only after the time from the current switching circuit being turned on reaches a first time threshold or the off-time of the current switching circuit reaches a second time threshold, wherein the first time threshold is longer than the second time threshold. | 11-21-2013 |
20130307503 | MULTI-PHASE SWITCHING CONVERTER WITH OVERLAP MODE AND CONTROL METHOD THEREOF - A multi-phase switching converter and control method thereof. The multi-phase switching converter includes a plurality of switching circuits and a controller. The output terminals of the plurality of switching circuits are coupled together to provide an output voltage to a load. The controller is configured to generate a plurality of control signals to turn on the plurality of switching circuits successively. When a load current increase is detected, the controller operates in an overlap mode and at least two switching circuits subsequent to the current switching circuit are turned on simultaneously. After the overlap mode, the controller resumes to the interleave mode and turns on the plurality of switching circuits successively from the switching circuit subsequent to the at least two switching circuits. | 11-21-2013 |
20130342176 | MULTI-PHASE SWITCHING-MODE POWER SUPPLY AND ASSOCIATED CONTROL METHOD - The present invention discloses a multi-phase switch-mode power supply (SMPS). The multi-phase SMPS may comprise a plurality of comparing circuits and a controller. Wherein each comparing circuit comprises a first input coupled to a threshold voltage, a second input coupled to a feedback signal of the output voltage, and an output configured to provide a load indication signal. The controller may have a plurality of inputs coupled to the outputs of the comparing circuit, and a plurality of outputs configured to provide control signals for driving a plurality of switches of the multi-phase SMPS. And the controller is configured to selectively turn on a plurality of the switches according to the load indication signals. | 12-26-2013 |
20140022684 | MULTI-PHASE SWITCHING CONVERTER WITH OVER CURRENT PROTECTION AND CONTROL METHOD THEREOF - A multi-phase switching converter includes a plurality of switching circuits and a controller. The output terminals of the plurality of switching circuits are coupled together to provide an output voltage to a load. The controller is configured to generate a plurality of control signals to control the plurality of switching circuits. When an over current condition of a current switching circuit of the plurality of switching circuits is detected, the controller skips the current switching circuit and successively turns on the remaining plurality of switching circuits that have not yet been turned on and where an over current condition has not been detected. | 01-23-2014 |
20140035654 | CONSTANT ON-TIME SWITCHING CONVERTERS WITH SLEEP MODE AND CONTROL METHODS THEREOF - A constant on-time switching converter includes a switching circuit, an on-time control circuit, a comparing circuit and a logic circuit. The switching circuit has a first switch and is configured to provide an output voltage to a load. The on-time control circuit generates an on-time control signal to control the on-time of the first switch. The comparing circuit compares the output voltage of the switching circuit with a reference signal and generates a comparison signal. The logic circuit generates a control signal to control the first switch based on the on-time control signal and the comparison signal. When the switching frequency of the switching circuit approaches an audible range, the switching converter enters into a sleep mode, the on-time control signal is reduced to increase the switching frequency of the switching circuit. | 02-06-2014 |
20140062434 | SWITCH MODE POWER SUPPLY, CONTROL CIRCUIT AND ASSOCIATED CONTROL METHOD - A switch mode power supply having an output terminal configured to provide an output voltage which is regulated to an output target, the switch mode power supply has a first switch and a control circuit. When the output voltage increases to a first threshold voltage, the control circuit is configured to turn OFF the first switch until a time period expires. | 03-06-2014 |
20140071720 | VOLTAGE CONVERTER AND ASSOCIATED OVER-VOLTAGE PROTECTION METHOD - A voltage converter includes: an input terminal receiving an input voltage; an output terminal providing an output voltage; a switching circuit having a main switch configured to regulate the output voltage, wherein a control end of the main switch is configured to receive a Pulse Width Modulation (PWM) signal, and the output voltage is controlled according to the duty cycle of the PWM signal; and a protection switch coupled between the input terminal and the switching circuit, and wherein when the output voltage is higher than a reference voltage, the protection switch is turned OFF. | 03-13-2014 |
20140084885 | SWITCH MODE POWER SUPPLY, CONTROL CIRCUIT AND ASSOCIATED CONTROL METHOD - A switch mode power supply having an output terminal configured to provide an output voltage, the switch mode power supply has a first switch and a control circuit. The control circuit is configured to provide a switching control signal to turn ON and turn OFF the first switch, an on-time period of the first switch is proportional to a first value when the switch mode power supply works in a power saving mode, and the on-time period of the first switch is proportional to a second value when the switch mode power supply works in a normal mode, wherein the first value is larger than the second value. | 03-27-2014 |
20140125302 | COT CONVERTER WITH CONTROLLED FREQUENCY AND ASSOCIATED METHOD - A SMPS having a switch; an output port coupled to a load, configured to provide a voltage feedback signal and a current feedback signal; an on-time generator, having an input end coupled to the current feedback signal, and having an output end providing a time signal indicating a time period; and a PWM generator, having a first input end coupled to the voltage feedback signal, a second input end coupled to the time signal, and an output end providing a PWM signal that is coupled to the control end of the switch, and wherein the PWM signal is configured to turn ON the switch when the voltage feedback signal is lower than a threshold voltage, and the PWM signal is configured to turn OFF the switch after the time period. | 05-08-2014 |
20140160601 | SWITCH MODE POWER SUPPLY, CONTROL CIRCUIT AND ASSOCIATED CONTROL METHOD - A switch mode power supply having an output terminal configured to provide an output voltage, the switch mode power supply has a first switch, a second switch and a control circuit. The control circuit is configured to provide a first switching control signal to turn ON and turn OFF the first switch, and when the switch mode power supply works in a power saving mode, the first switch is turned ON if a voltage feedback signal is less than a reference voltage and a current flowing through the second switch is less than a bias current. | 06-12-2014 |
20140167833 | DIGITAL CONTROLLERS AND DIGITAL CONTROL METHODS OF MULTI-PHASE SWITCHING CONVERTERS - A method for controlling a multi-phase switching converter with a plurality of switching circuits, including: sensing the output current of the switching circuit and generating a current sensing signal; generating a digital phase current signal based on the current sensing signal; subtracting the digital phase current signal from a current reference signal and generating a current error signal; proportionally integrating the current error signal and generating a first bias signal; conducting a sigma-delta modulation of the first bias signal and generating a second bias signal, wherein the first bias signal is a P-bit digital signal, the second bias signal is a Q-bit digital signal, and P is larger than Q; and adjusting a control signal controlling the switching circuit based on the second bias signal. | 06-19-2014 |
20140375286 | CONSTANT ON-TIME SWITCHING CONVERTER AND CONTROL METHOD THEREOF - A switching converter providing an output voltage has at least one switch and a control circuit. The control circuit has a slope compensation module, an output correction module and a control module, wherein the slope compensation module provides a slope compensation signal, the output correction module provides a voltage trim signal based on the slope compensation signal, and the control module provides a control signal to control the at least one switch based on the slope compensation signal, the voltage trim signal, a reference signal, the output voltage and an error compensation signal provided based on a difference between the output voltage and a set target of the output voltage. | 12-25-2014 |
20150069982 | CONSTANT ON-TIME CONTROL SWITCHING CONVERTER WITH DC CALIBRATION AND CONTROL CIRCUIT AND METHOD THEREOF - A constant on-time control switching converter with DC calibration is disclosed. A current flowing into a capacitor of a DC calibration circuit is reduced by introducing a transconductance amplifier and a resistor. Thus, the equivalent capacitance of the capacitor is magnified, which allows the user to integrate a capacitor with smaller capacitance to realize DC calibration. | 03-12-2015 |