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…
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…
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…
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…
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…
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…
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…
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.
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…
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…
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.
EEPROM memory cell with a coupler region and method of making the same
Granted: September 20, 2016
Patent Number:
9450052
An EEPROM memory cell with a coupler region is disclosed. The coupler region has a well and at least one feeder region formed in the well. The at least one feeder region is configured to provide majority carriers to a channel region defined in the well so that a portion of the channel region adjoining the top surface of the coupler region is inverted during an erase operation.
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.
Boost PFC converter, method and control circuit used for boost PFC converter
Granted: September 13, 2016
Patent Number:
9444327
A boost PFC converter, a method and a control circuit used for boost PFC converter are discussed in the present invention. The boost PFC converter decreases the switching frequency when a line voltage is around zero, so that the whole operating efficiency is not decreased.
Voltage detecting circuit for switching converters and the method thereof
Granted: August 30, 2016
Patent Number:
9431913
A voltage detecting circuit used with a switching converter. The switching converter having an energy storage component, a first power switch and a second switch. The voltage detecting circuit has a sample and hold circuit configured to sample and hold the voltage at the connection node of the energy storage component and the first power switch when the first power switch is OFF and the second power switch is ON; and an average circuit configured to average the sampled voltage during a…
Voltage converter circuit and associated control method to improve transient performance
Granted: August 30, 2016
Patent Number:
9431906
A converter circuit has an error amplifier to provide an error signal; a proportional amplifier to provide a gain signal according the error signal and an output voltage of the converter circuit; a first comparator, generating a pulse signal according to the gain signal and a comparison signal; and a timer, generating a timing signal according to the pulse signal to indicate the on time and the off time of the converter circuit; and wherein either the gain signal or the comparison signal…
Switching charger, the control circuit and the control method thereof
Granted: August 30, 2016
Patent Number:
9431845
A switching charger having a control circuit configured to provide a control signal; a power stage turned ON and OFF by the control signal; an inductor coupled between the power stage and a load; and an output capacitor coupled in parallel with the load; a current sense circuit integrated to the control circuit to sense a current flowing through the power stage.
Power supply system, associated current ripple suppression circuit and method
Granted: August 30, 2016
Patent Number:
9429970
A power supply system has a current source configured to provide an output current, a load supplied by the current source, and a current ripple suppression circuit. The current ripple suppression circuit has a first end and a second end, wherein the first end of the current ripple suppression circuit is coupled to the load, and the second end of the current ripple suppression circuit is coupled to a reference ground; wherein the current ripple suppression circuit is configured to…
Load regulation compensation module and switching converter comprising the same
Granted: August 23, 2016
Patent Number:
9425689
A switching converter and a load regulation compensation module for improving load regulation accuracy of the switching converter. The switching converter regulates its output voltage through controlling a switch module to switch on and off based on a first reference signal and a feedback signal indicative of the output voltage. The on and off switching of the switch module generates a switching current, resulting in an average offset voltage between an internal reference ground and a…
