Monolithic Power Systems Patent Grants

Switch mode power supply, control circuit and associated control method

Granted: January 31, 2017
Patent Number: 9559586
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…

Control circuit with chopping amplifier for switching converter

Granted: January 24, 2017
Patent Number: 9553513
A control circuit for switching converter has a chopping amplifier, a sample-hold circuit, a first comparator, an oscillator and a logic circuit. The chopping amplifier generates an amplified error signal based on a reference signal and a feedback signal. The sample-hold circuit generates a sample-hold signal based on the amplified error signal. The first comparator generates a first logic signal based on a comparison result between the sample-hold signal and a current sensing signal…

Digitally calibrated voltage regulators for power management

Granted: January 10, 2017
Patent Number: 9541973
A computer provides a graphical user interface for displaying a virtual representation of a voltage regulator and for accepting a user requirement for the voltage regulator. The computer automatically determines an internal calibration setting of the voltage regulator that meets the user requirement. The computer simulates operation of the voltage regulator as calibrated with the internal calibration setting. The internal calibration setting is downloaded to the voltage regulator. A…

Power converter with pseudo-constant-on-time control and the control circuit and method thereof

Granted: December 20, 2016
Patent Number: 9525342
A control circuit for controlling a switching circuit is disclosed. The control circuit has a ramp compensation circuit, a ramp regulating circuit and a comparison circuit. The ramp compensation circuit generates a ramp compensation signal with the amplitude proportional to the difference between 1 and the duty cycle of a main switch of the switching circuit. The ramp regulating circuit generates a ramp regulating signal with the amplitude proportional to the duty cycle of the main…

Resonant converter, control circuit and associated control method with adaptive dead-time adjustment

Granted: December 20, 2016
Patent Number: 9525358
A resonant converter has a switching circuit having a first switch and a second switch, a control circuit and a resonant circuit. The control circuit has a slope sensing circuit providing a slope sense signal based on a voltage variation at the common node of the first switch and the second switch, a slope judge circuit providing a slope judge signal, and a turn-ON control circuit providing a first reset signal to adjust a first dead-time period from turning OFF the first switch to…

Constant on-time switching converters with ultrasonic mode determination circuit and control methods thereof

Granted: December 13, 2016
Patent Number: 9520778
A control method used in a constant on-time switching converter includes: judging whether the switching converter enters into an ultrasonic mode; turning ON the low-side switch to discharge the output capacitor when the switching converter enters into the ultrasonic mode; generating an additional slope compensation signal during the discharge of the output capacitor; comparing a feedback signal indicative of the output voltage of the switching circuit with the sum of a reference voltage…

Method for fabricating low-cost isolated resurf LDMOS and associated BCD manufacturing process

Granted: November 22, 2016
Patent Number: 9502251
A method for fabricating a LDMOS device in a semiconductor substrate of a first doping type, including: implanting a series of dopants into the semiconductor substrate using a first mask, and forming a first region of a second doping type adjacent to the surface of the semiconductor substrate, a second region of the first doping type located beneath the first region, and a third region of the second doping type located beneath the second region; implanting dopants into the semiconductor…

Field effect transistor, termination structure and associated method for manufacturing

Granted: November 15, 2016
Patent Number: 9496382
The present disclosure discloses a field effect transistor (“FET”), a termination structure and associated method for manufacturing. The termination structure for the FET includes a plurality of termination cells arranged substantially in parallel from an inner side toward an outer side of a termination area of the FET. Each of the termination cells comprises a termination trench and a guard ring region located underneath the bottom of the termination trench in the semiconductor…

Soft start circuit for switching converter and associated soft start method

Granted: November 15, 2016
Patent Number: 9496781
A soft start circuit for a switching converter, the soft start circuit has an internal soft start voltage generating circuit, an amplifier circuit and a buffer circuit, the internal soft start voltage generating circuit provides an internal soft start voltage, the amplifier circuit has a first input terminal receiving the internal soft start voltage, a second input terminal receiving a soft start reference signal and an output terminal, the buffer circuit has an input terminal coupled to…

Controller with thermal balance and control method thereof for multi-phase switching converters

Granted: November 15, 2016
Patent Number: 9496792
A controller used in a multi-phase switching converter, including: a bias current generator that generates a plurality of bias current signals; a temperature balance modulating circuit that generates a plurality of on time signals based on the plurality of the bias current signals; and a logic circuit that generates a plurality of control signals based on the plurality of on time signals. The plurality of the control signals is used to control a plurality of switching circuits of the…

Single stage LED driver system, control circuit and associated control method

Granted: November 1, 2016
Patent Number: 9485819
A light-emitting element driver system has a power conversion circuit, a second switch and a control circuit, the power conversion circuit has a primary circuit, a transformer, a first rectified circuit and a second rectified circuit, the second rectified circuit provides a first signal, the second switch has a first terminal coupled to an output terminal of the first rectified circuit and a second terminal to provide a second signal, when a dimming signal is in a first state, the…

Control circuit with synchronization unit for switching converter and associated control method

Granted: October 25, 2016
Patent Number: 9479043
A control circuit for a switching converter having a comparison circuit, a synchronization unit, an ON-time control circuit and a logic unit, the comparison circuit provides a comparison signal based on a reference signal and an output signal of the switching converter, the synchronization unit provides a first synchronization signal and a second synchronization signal based on a first clock signal, a second clock signal and the comparison signal, the first synchronizing signal is…

Multi-mode PFC control and control method thereof

Granted: October 25, 2016
Patent Number: 9479046
A PFC circuit includes: a switching circuit having a power switch; an on time control circuit for controlling an on time period of the power switch; a first off time control circuit; a second off time control circuit; and a logic circuit selectively controls the power switch working under CCM or DCM; when working under CCM, the first off time control circuit controls an off time period of the power switch and when working under DCM, the second off time control circuit controls the off…

Offline power converter and the method thereof

Granted: October 18, 2016
Patent Number: 9472943
An offline power converter provides low EMI and quick reaction by slowly turning off a power switch at normal operation, and fast turning off the power switch when surge event happens.

Voltage regulator with hybrid adaptive voltage position and control method thereof

Granted: October 18, 2016
Patent Number: 9473027
A voltage regulator with hybrid adaptive voltage position includes a resistor, a controllable current source, a current DAC and an error amplifier. The resistor has a first terminal coupled to the output voltage of the voltage regulator and a second terminal. The controllable current source is coupled to the second terminal of the resistor to provide a main current proportional to the output current of the voltage regulator. The current DAC is configured to receive a digital signal and…

Power supply system with ripple suppression circuit and ripple suppression method thereof

Granted: October 11, 2016
Patent Number: 9467039
A ripple suppression circuit has a filter circuit and a follower circuit. The filter circuit has a first input terminal coupled to a signal source to receive a ripple signal and an output terminal to output a filter signal which is the sum of the average value of the ripple signal and a positive bias signal. The follower circuit has a first input terminal, a second input terminal and an output terminal, wherein the first input terminal is coupled to the signal source to receive the…

SMPS with adaptive COT control and method thereof

Granted: October 11, 2016
Patent Number: 9467045
A SMPS has a switching circuit and a controller. The switching circuit has an input terminal and an output terminal, and also includes a switch and an inductor, wherein the switching circuit regulates an output voltage at the output terminal based on an input voltage at the input terminal by controlling a switching action of the switch. The controller generates a switching control signal to control the switch, where the switching control signal transits from a first state to a second…

Monolithic integrated circuit switch device with output current balancing for parallel-connection

Granted: October 11, 2016
Patent Number: 9467136
An electrical circuit includes monolithic integrated circuit (IC) switch devices that are connected in parallel. A monolithic IC switch device includes a first pin, a second pin, and a power switch that connects the first pin to the second pin through the power switch when the electrical circuit is turned ON. The monolithic IC switch device includes a current balancing circuit that controls the power switch to reduce an output current of the monolithic IC switch device when the output…

Switching converter with slope compensation circuit

Granted: September 27, 2016
Patent Number: 9455625
A switching converter with slope compensation circuit, the slope compensation circuit has a first voltage source, a first operation circuit, a first switch, a first capacitor, a second switch and a first controlled current source.

LED driver, LED driving method and controller for LED driver

Granted: September 20, 2016
Patent Number: 9449546
A LED driver, a LED driving method and a controller for LED driver are discussed in the present invention. The LED driver detects the phase of the input signal which is phase cut by a triac from a pre-E-transformer. The LED driver regulates the current flowing through the LED strings by varying the phase of the input signal.