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.
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…
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…
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.
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.
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.
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…
Timing circuits and driving circuits used in lighting systems
Granted: August 16, 2016
Patent Number:
9420648
A timing circuit used in lighting systems includes a first logic circuit, a first counter, a latching circuit and a judging circuit. The first logic circuit generates a first logic signal and a second logic signal based on a falling edge of a detecting signal. The first counter generates a first counting signal and a second counting signal based on the second logic signal, wherein the counting period of the first counting signal is longer than that of the second counting signal. The…
Semiconductor device and associated method for manufacturing
Granted: August 16, 2016
Patent Number:
9418983
A semiconductor device having an ESD protection structure and a method for forming the semiconductor device. The ESD protection structure is formed atop a termination area of the substrate and is electrically coupled between a source metal and a gate metal of the semiconductor device. The ESD protection structure has a first portion adjacent to the source metal, a second portion adjacent to the gate metal and a middle portion between and connecting the first portion and the second…
Multi-phase SMPS with loop phase clocks and control method thereof
Granted: August 2, 2016
Patent Number:
9407148
A multi-phase SMPS has N switching circuits; a setting signal generator generating a setting signal based on an output signal of the SMPS; a clock signal generator generating a system clock signal; and a controller receiving the setting signal and the system clock signal, the controller generating N shifted phase clock signals according to the system clock signal, and the N shifted phase clock signals forming loop phase clocks, and the controller further generates N switching control…
Flyback converter with current controlled low power mode
Granted: August 2, 2016
Patent Number:
9407151
An isolated switching converter includes a transformer having a primary winding, a secondary winding and an auxiliary winding, a primary switch coupled to the primary winding, a secondary switch coupled to the secondary winding, and a feedback circuit coupled to the auxiliary winding to generate a feedback signal indicative of the output voltage. Under normal operation, the primary switch is controlled based on the feedback signal and the secondary switch is controlled based on the…
