AC-DC converting apparatus and method thereof
Granted: April 2, 2019
Patent Number:
10250143
An AC/DC converting apparatus having first and second input nodes for receiving an AC input voltage Vin, a first pair of switches for coupling a first terminal of a first inductor to the first input node and ground, a second pair of switches for coupling a second terminal of the first inductor to an output node for providing a DC output voltage Vout and ground, a third pair of switches for coupling a first terminal of a second inductor to the second input node and ground, and a fourth…
Control circuit for buck-boost power converter with seamless mode transition control
Granted: April 2, 2019
Patent Number:
10250141
A buck-boost power converter and a control circuit for the buck-boost converter. The control circuit includes a buck cycle pulse width modulation module and a boost cycle pulse width modulation module respectively having a first controllable hysteresis and a second controllable hysteresis. The buck cycle pulse width modulation module can regulate the first controllable hysteresis during the buck-boost power converter transits between a buck mode and a buck-boost mode so as to eliminate…
Integrated circuit for switching converter and method for providing power supply voltage to the same
Granted: March 5, 2019
Patent Number:
10224823
An integrated circuit used for a switching converter has a power supply circuit for providing a power supply voltage, and a control circuit. The switching converter has a switching circuit converting a DC input voltage into an output signal. The power supply circuit has a protection circuit, an UVLO unit and a current source coupled to a power supply capacitor. The protection circuit detects whether the DC input voltage is at a brown-in state. The UVLO unit generates a lock out signal by…
Resonant converter with adaptive on-time control and the method thereof
Granted: January 22, 2019
Patent Number:
10186975
A resonant converter adopts adaptive on-time control to provide better transient response. When the output voltage of the resonant converter varies, the on-time length of a power switch in power stages is adjusted, so that the switching frequency and the gain are regulated and optimized.
Control circuit for buck-boost power converter with stable bootstrap voltage refresh
Granted: January 15, 2019
Patent Number:
10181793
A buck-boost power converter and a control circuit for the buck-boost converter. The buck-boost power converter includes a first power switch and a second power switch coupled in series between an input port and a reference ground, and a third power switch and a fourth power switch coupled in series between an output port and the reference ground. The control circuit receives a pulse skipping control signal and a zero-crossing indication signal, and controls the second power switch…
Non-audible control circuit for a buck converter in DCM mode
Granted: December 25, 2018
Patent Number:
10164514
Noise-free control circuit and control method for controlling a switching converter to avoid generating audile noises. The noise-free control circuit has a timer used to set a noise-free frequency threshed. When the switching frequency of the switching converter is decreased to the noise-free frequency threshold, the switching frequency of the switching converter is limited to the noise-free frequency threshold. The noise-free frequency threshold is higher than a maximum audible…
Battery charging circuit with high capacity, control circuit and associated control method
Granted: October 30, 2018
Patent Number:
10116155
A battery charging circuit has a first switching circuit and a second switching circuit which are coupled in parallel. A control circuit has a plurality of feedback control loops, a logic integrated circuit, a first logic circuit and a second logic circuit, wherein the plurality of feedback control loops provides a plurality of feedback control signals, the logic integrated circuit provides a logic integrated signal based on the plurality of feedback control signals, the frequency…
Battery charging circuit, control circuit and associated control method
Granted: October 23, 2018
Patent Number:
10110037
A battery charging circuit receives an input current, and provides a system voltage and a charging current to charge a battery. A control circuit used to control the battery charging circuit has a charging current control loop providing a compensation signal, an inductor current control loop providing a first loop control signal, and a system voltage control loop providing a second loop control signal. The control circuit provides an inductor current reference signal based on the…
Method for fabricating LDMOS with self-aligned body
Granted: October 2, 2018
Patent Number:
10090409
A method for fabricating a LDMOS device, including: forming a semiconductor substrate; forming a dielectric layer atop the semiconductor substrate and an electric conducting layer on the dielectric layer; forming a first photoresist layer on the electric conducting layer; patterning the first photoresist layer through a first mask to form a first opening; etching the electric conducting layer through the first opening; implanting dopants of a first doping type into the semiconductor…
LED driving system and associated control method
Granted: October 2, 2018
Patent Number:
10091846
A LED driving system has an energy storage component receiving an input voltage, a power switch coupled between the energy storage component and a reference ground, a first output switch coupled between the energy storage component and a first output terminal, a second output switch coupled between the energy storage component and a second output terminal, and a control circuit, wherein the first output terminal produces a first output voltage to supply power for a first LED array, the…
Bipolar junction semiconductor device and method for manufacturing thereof
Granted: October 2, 2018
Patent Number:
10090200
A bipolar junction semiconductor device and associated method of manufacturing, the bipolar junction semiconductor device has a P type substrate, a N type buried layer formed in the substrate, a P? type first epitaxial layer formed on the buried layer, a P? type second epitaxial layer formed on the first epitaxial layer, a PNP BJT unit formed in the first and second epitaxial layers at a first active area, a NPN BJT unit formed in the first and second epitaxial layers at a second active…
Semiconductor device reducing parasitic loop inductance of system
Granted: September 25, 2018
Patent Number:
10083930
A semiconductor device reducing parasitic loop inductance of system for the switching converter. The semiconductor device has an input voltage pin, a ground reference pin, a switching pin, and a semiconductor die, wherein the semiconductor die comprises a high-side power switch and a low-side power switch and a metal connection. The metal connection directly connects the high-side power switch and the first terminal of the low-side power switch, and is along and proximity to an edge of…
High voltage current source with short circuit protection
Granted: September 18, 2018
Patent Number:
10079542
A current source generating a charging current and a supply voltage by charging a capacitor with the charging current. The current source has a conversion circuit converting a line voltage into a second voltage, a current generation circuit generating the charging current based on the second voltage, and a control circuit controlling the current generation circuit based on the supply voltage. The charging current is controlled to be at a first current value when the supply voltage is…
Control circuit for maintaining a switching frequency for constant on time converter
Granted: September 11, 2018
Patent Number:
10075078
A control circuit for a switching power converter is disclosed. The control circuit may comprise an OFF control signal generation module configured to generate an OFF control signal having an inactive logic state and an active logic state. The control circuit is configured to turn OFF a main switch of the switching power converter in response to the active logic state. The OFF control signal generation module can regulate an ON time of the main switch through regulating a change of the…
Buck-boost power converter and associated mode transition control module
Granted: September 11, 2018
Patent Number:
10075075
A buck-boost power converter and a mode transition control module. The mode transition control module includes a buck duty cycle sensing and comparison circuit and a boost duty cycle sensing and comparison circuit. The buck duty cycle sensing and comparison circuit can provide a first mode transition control signal through comparing a first signal indicative of a buck duty cycle with a first threshold signal indicative of a buck duty threshold to regulate the buck-boost power converter…
Synchronous switching converter and associated integrated semiconductor device
Granted: September 4, 2018
Patent Number:
10069422
A synchronous switching converter has an integrated semiconductor device. The integrated semiconductor device has a first semiconductor component and a second semiconductor component coupled in parallel. The first semiconductor component has MOSFET cells with body diodes, and the second semiconductor component has diode cells or MOSFET cells with a low forward voltage. Cells of the second semiconductor component distribute among the first semiconductor component unevenly according to a…
Buck-boost battery charging circuit, control circuit and associated control method
Granted: August 28, 2018
Patent Number:
10063078
A battery charging circuit has a first switching circuit and a second switching circuit coupled in parallel between an input port and a node, a first switch coupled between the node and a system ground, a second switch coupled between the node and an output port, and a control circuit. When an input voltage is higher than a system voltage, the control circuit controls the first switching circuit and the second switching circuit turned ON and OFF with interleaving, the first switch…
Over-voltage protection circuit and associated method
Granted: August 14, 2018
Patent Number:
10050615
An over-voltage protection circuit for a transistor switch has an error detecting circuit, a dummy load circuit and a driving circuit. The error detecting circuit has a first input terminal; and a second input terminal configured to receive a reference signal. The dummy load circuit is configured to establish a conductive path between the output terminal of the transistor switch and ground. The driving circuit is configured to increase the on-resistance of the transistor switch if the…
Auto calibration method used in constant on-time switching converter
Granted: July 10, 2018
Patent Number:
10020734
An auto calibration method used in switching converters with constant on-time control. The auto calibration method includes: generating a periodical clock signal with a predetermined duty cycle; providing a first voltage and a second voltage to an on-time control circuit to generate an on-time control signal based on the first and second voltage; providing the clock signal and on-time control signal to a logic circuit to generate a switch control signal based on the clock signal and…
Two-channel LED driver with short circuit protection and short circuit protection method for two-channel LED driver
Granted: July 10, 2018
Patent Number:
10021754
A two-channel LED driver with short circuit protection is discussed. A short process circuit monitors a short condition of the LED driver, and locks the short status if short circuit occurs at either one of or both of the channels.
