Switched tank converter with low voltage stress
Granted: June 22, 2021
Patent Number:
11043898
A switched tank converter includes: a first conversion unit and a second conversion unit, each having a clamp capacitor coupled between a first terminal and a third terminal, a high side switch coupled between the first terminal and a switch node, a low side switch coupled between the switch node and a second terminal, and a resonant tank coupled between the switch node and a fourth terminal; and a rectification unit having four rectification switches, wherein a second terminal of the…
Voltage regulator with clamped adaptive voltage position and control method thereof
Granted: June 22, 2021
Patent Number:
11043896
A voltage regulator has a switching circuit and a control circuit. The switching circuit receives an input voltage and provides an output voltage and an output current. The control circuit provides a control signal to the switching circuit, such that the output voltage is maintained at a clamp voltage level when the output current is lower than a transition current level, and the output voltage decreases as the output current increases when the output current is higher than the…
Synchronous rectifiers with reduced power loss and the method thereof
Granted: June 8, 2021
Patent Number:
11031877
A synchronous rectifier monitors a driven signal of a synchronous switch. If the driven signal is provided within a set time length, the driven signal is latched off, to make the system enter light load mode.
Flyback circuit with energy recycling and control method thereof
Granted: June 8, 2021
Patent Number:
11031876
An energy recycle circuit for a flyback circuit and method thereof. The energy recycle circuit has an auxiliary switch coupled in series to a clamp capacitor to form a branch, and the branch is coupled in parallel with the primary winding, or with the primary switch. The energy recycle circuit further has a recycle control circuit to generate an auxiliary switching signal. The auxiliary switch is turned on during a charging process of the clamp capacitor, and is turned off at an end of…
Slew rate controlled power supply and associated control method
Granted: May 4, 2021
Patent Number:
10996732
A power supply has a reference regulation circuit and a voltage regulator. The reference regulation circuit receives a VID code and a slew rate command from a processor and regulates a reference voltage based on the VID code and the slew rate command. The voltage regulator converts an input voltage to an output voltage based on the reference voltage. The circuit has a ?-? modulation unit to generate a count duration signal based on a target count signal, wherein the target count signal…
Current generating circuit generating a current relevant to a reference voltage
Granted: April 13, 2021
Patent Number:
10976765
A current generating circuit generating a current relevant to a reference voltage. The current generating circuit has a reference clock generating circuit generating a reference clock signal which has a frequency relevant to the reference voltage. The current generating circuit has a phase locked loop circuit generating a calibration clock signal. The phase clocked loop circuit regulates the calibration clock signal so that the phase difference between the calibration clock signal and…
Controller and control method used in switched tank converter
Granted: April 6, 2021
Patent Number:
10972010
A control method used in a switched tank converter with a first conversion unit, a second conversion unit and a rectification unit, includes: based on current flowing through the resonant tanks in the first and second conversion units, determining when to turn on the high side switches of the first and second conversion units, and when to turn on the low side switches of the first and second conversion units; detecting whether current flowing through the first, second, third and fourth…
Multi-phase converter and control circuit thereof
Granted: April 6, 2021
Patent Number:
10972009
A COT control circuit used for realizing current sharing in multi-phase DC-DC converter. The multi-phase DC-DC converter has N switching circuits, N controllers, and a trimming current generator receiving N switching voltage signals of the N switching circuits to generate N trimming current signals. The N trimming current signals are respectively sent to the N controllers to regulate on time of at least one controllable switch of each of the N switching circuits so as to finally realize…
Motor control system and associated method to control motor speed
Granted: March 30, 2021
Patent Number:
10965236
A motor control system has a computing device and a motor controller. The computing device receives user demands through a GUI, and provides a preset speed table based on the user demands. The preset speed table has a plurality of fixed values of a duty cycle of a pulse width modulation signal and a plurality of preset values of a preset motor speed corresponding to the plurality of fixed values of the duty cycle of the pulse width modulation signal. The motor controller provides the…
Switching power supply circuit with synchronous rectifier and associated control circuit and control method
Granted: March 16, 2021
Patent Number:
10951124
A switching power supply circuit has an energy storage component, a synchronous rectifier switch and a synchronous rectifier control circuit. The synchronous rectifier switch is coupled to a secondary side of the energy storage component, and the synchronous rectifier control circuit turns ON the synchronous rectifier switch based on a drain-source voltage across the synchronous rectifier switch when a primary switch is judged as turned ON. When the switching power supply circuit is not…
Voltage regulator with nonlinear adaptive voltage position and control method thereof
Granted: March 16, 2021
Patent Number:
10951116
A voltage regulator has a switching circuit and a control circuit. The switching circuit provides an output voltage and an output current. The control circuit provides a switching control signal to the switching circuit to adjust the output voltage, such that the output voltage decreases with a first slope as the output current increases when the output current is less than a predetermined current, the output voltage decreases with a second slope as the output current increases when the…
Battery charging circuit with improved system stability and control method thereof
Granted: March 16, 2021
Patent Number:
10951049
A control method for controlling a battery charging circuit having at least one switch, includes: generating a first difference signal based on a charging current feedback signal and a charging current reference signal; generating a second difference signal based on a battery voltage feedback signal and a battery voltage reference signal; based on a battery voltage, selecting one of the first and second difference signals, and a ground voltage as a third difference signal; generating a…
Isolated resonant converter with fixed output ripple
Granted: February 23, 2021
Patent Number:
10931204
An isolated resonant converter has an analog comparator with hysteresis for generating a first ON/OFF signal, a digital isolator for outputting a second ON/OFF signal, an oscillator for providing a clock pulse signal with a frequency, and a primary pulse width modulator coupled to receive the clock pulse signal and the second ON/OFF signal. An output voltage of the isolated resonant converter is controlled by the analog comparator within a predefined range. The second ON/OFF signal is…
Bi-directional snapback ESD protection circuit
Granted: February 23, 2021
Patent Number:
10930644
An ESD protection circuit having a discharging transistor and a body snatching circuit. The discharging transistor is electrically coupled between a first node and a second node. The gate of the discharging transistor is electrically coupled to a driving voltage. The body snatching circuit receives the voltages at the first and second nodes and outputs either the voltage at the first node or the voltage at the second node based on which of these two voltages have a lower value. The…
Control circuit having power limit for an AC-DC converter and integrated circuits thereof
Granted: February 16, 2021
Patent Number:
10924023
A control circuit having power limit for controlling an AC-DC voltage converter. The control circuit includes a first sensing circuit having an auxiliary winding used to sense a voltage on an inductive element of the converter to generate a first sensing signal, a second sensing circuit used to sense the current flowing through the inductive element to provide a second sensing signal, and a power limit circuit. The power limit circuit generates a power indication signal indicative of the…
Power supply and power supplying method with power backup
Granted: January 12, 2021
Patent Number:
10892637
A power supply covering both power sharing and power backup functions run in a more efficient and flexible way. The power supply adopts a power sharing converter coupled between a first bus terminal and a second bus terminal, so that if one of the bus terminals provides insufficient power, the other bus terminal kicks in by way of the power sharing converter to provide power support. In addition, a storage capacitor may also kick in to provide power support if one of the bus terminals…
Synchronous rectifier off control module and synchronous rectifying control circuit
Granted: December 29, 2020
Patent Number:
10879810
A synchronous rectifier OFF control module and a synchronous rectifying control circuit. The synchronous rectifier OFF control module may receive a zero-cross threshold signal and a drain-source voltage signal indicative of a drain to source voltage of a synchronous rectifier, and to compare the drain-source voltage signal with the zero-cross threshold signal to determine whether the rectifier current flowing through the synchronous rectifier is crossing zero. The synchronous rectifier…
Battery balancing circuit balancing voltages between battery units with a fly capacitor
Granted: December 29, 2020
Patent Number:
10879706
A battery balancing method and circuit for balancing the voltages between battery units with a fly capacitor. In a first time period of a switching cycle, the first battery unit is used to charge the fly capacitor or the first battery unit is used to discharge the fly capacitor, depending on which of the first battery unit and the fly capacitor having a larger voltage value; and in a second time period of the switching cycle, the second battery unit is used to charge the fly capacitor or…
Mix-mode PFC circuit and a method thereof
Granted: December 1, 2020
Patent Number:
10855171
A control method of a PFC (Power Factor Correction) circuit having at least one power switch, the control method having: producing an effective value of an input voltage; generating a compensation signal based on an output voltage and an output voltage reference signal; generating an on time signal based on the compensation signal, the effective value of the input voltage, a first on time period value and a second on time period value; generating an on time delay signal based on the…
Power supply and power supply method with power sharing and overshoot preventing
Granted: December 1, 2020
Patent Number:
10855174
A power supply covering power sharing and overshoot preventing functions. In the power supply, a first eFuse is used to deliver a first input power source to a first load at a first bus terminal, and a second eFuse is used to deliver a second input power source to a second load at a second bus terminal. When the current flowing through one eFuse hits its current limit threshold, the other input power source kicks in to provide power support. The current limit threshold of each eFuse is…
