Adaptive constant on time converter and the method thereof
Granted: January 11, 2022
Patent Number:
11223276
A voltage converter with a high side power switch, having: an off control circuit, having a first input terminal configured to receive an input voltage, a second input terminal configured to receive an output voltage, a third input terminal configured to receive a current representing signal indicative of a current flowing through the high side power switch, a fourth input terminal configured to receive an on-set signal in response to an on operation of the high side power switch, and an…
Vertical transistor structure with buried channel and resurf regions and method of manufacturing the same
Granted: December 28, 2021
Patent Number:
11211484
The present disclosure describes vertical transistor device and methods of making the same. The vertical transistor device includes substrate layer of first conductivity type, drift layer of first conductivity type formed over substrate layer, body region of second conductivity type extending vertically into drift layer from top surface of drift layer, source region of first conductivity type extending vertically from top surface of drift layer into body region, dielectric region…
Lateral DMOS having reduced lateral size
Granted: December 21, 2021
Patent Number:
11205722
A lateral DMOS having a well region, a source region, a drain region, a first gate region and a second gate region. The first gate region may be positioned atop a portion of the well region near the source region side. The second gate region may be formed in a portion of the well region near the drain region side. The second gate region includes a shallow trench isolation structure formed in a shallow trench opened from a top surface of the well region and extended vertically into the…
LED driving system with master-slave architecture
Granted: November 30, 2021
Patent Number:
11191137
An LED driving system with a master-slave architecture. The LED driving system has at least two LED driving circuits which both have a first status detecting circuit, a second status detecting circuit and a first feedback control circuit. The first status detecting circuit receives a plurality of headroom detecting voltages provided by a plurality of LED strings and generates at least one self-status signal. The second status detecting circuit receives a downstream feedback signal and…
Test system and test method for a voltage regulator with multi-mode control
Granted: November 2, 2021
Patent Number:
11163326
A test method of a voltage regulator having a plurality of parameters that need to be set, the test method includes: receiving a user requirement on a computer; generating a plurality of setting combinations of the plurality of parameters, the plurality of parameters has different combination of values in different setting combinations; downloading the plurality of setting combinations to the voltage regulator via a first I/O bus and configuring the voltage regulator with each setting…
Battery charging system and a method thereof
Granted: September 28, 2021
Patent Number:
11133682
A battery charging and balancing circuit, for charging a battery pack having a plurality of cells. The battery charging and balancing circuit having a detecting circuit to provide a balancing connection indicating signal; a charging circuit to charge the battery pack based on the cell voltages when the balancing connection indicating signal is valid, and to charge the battery voltage otherwise; and a balancing circuit to control the discharging switches coupled with the cells based on…
Multi-port battery charge and discharge system
Granted: August 31, 2021
Patent Number:
11108256
A multi-port battery charge and discharge system used in the charge and discharge battery pack application. The multi-port battery charge and discharge system has N voltage converting circuits, each of which can operate in a charge mode to charge a battery pack or in a discharge mode to supply power sinks. The N voltage converting circuits can be operated in a master-slave configuration with one of the N voltage converting circuits set as a master voltage converting circuit and the…
High switching frequency direct AC to AC converter
Granted: August 17, 2021
Patent Number:
11095229
A direct AC to AC converter includes a modulation stage, a transformer and a de-modulation stage. The modulation stage is configured to convert an AC input voltage with a first frequency into a bipolar PWM voltage with a second frequency, wherein the second frequency is higher than the first frequency. The transformer has a primary winding and secondary winding, wherein the primary winding is coupled to the modulation stage to receive the bipolar PWM voltage. The de-modulation stage is…
Switching power supply circuit with synchronous rectification and associated control method
Granted: August 10, 2021
Patent Number:
11088627
A switching power supply circuit with synchronous rectifier has an energy storage component, a rectifier switch coupled to a secondary side of the energy storage component, and a secondary side control circuit. The secondary side control circuit provides a driving signal to control the rectifier switch. When the drain-source voltage across the rectifier switch is less than a first threshold value, the secondary side control circuit controls the driving signal to be a maximum voltage to…
Phase shedding control method used in multiphase switching converters with daisy chain configuration
Granted: August 3, 2021
Patent Number:
11081954
A multiphase switching converter with automatic phase shedding control, wherein the multiphase switching converter includes a plurality of switching circuits coupled in parallel, and a plurality of control circuits configured in a daisy chain and respectively configured for driving a corresponding one of the plurality of switching circuits. Each of the control circuit generates a current threshold based on a corresponding sequence information, and compares a current indication signal…
Lateral schottky diode with high breakdown voltage capability
Granted: August 3, 2021
Patent Number:
11081597
A lateral diode with high breakdown voltage capability and a method for forming the lateral diode. The lateral diode has an anode, a cathode, a substrate having a first conductivity type, an epitaxial layer having formed on the substrate, a current region formed in the epitaxial layer and on the substrate, a first well coupled to the anode, a second well coupled to the cathode, a third well with light doping concentration formed beside the first well, and a guard ring with heavy doping…
Adaptive dimming circuit and a method thereof
Granted: July 20, 2021
Patent Number:
11071181
A dimming module having: a calculating circuit, configured to receive a preset current duty cycle reference signal, a preset current magnitude reference signal and a feedback voltage of an associated light-emitting device string, and to provide a current duty cycle reference signal and a current magnitude reference signal; and a current regulating circuit, configured to receive the feedback voltage of the associated light-emitting device string, the current duty cycle reference signal…
Manufacturing method of self-aligned DMOS body pickup
Granted: July 20, 2021
Patent Number:
11069777
A manufacturing process of a DMOS device in a drift region in a semiconductor substrate, having: forming a polysilicon layer above the drift region; forming a block layer above the polysilicon layer; etching both the block layer and the polysilicon layer, through a window of a first masking layer to expose a window to the drift region; implanting dopants through the window to the drift region to form a body region; forming blocking spacers to wrap side walls of the polysilicon layer;…
Controller for a multi-phase converter and fault detection method thereof
Granted: July 13, 2021
Patent Number:
11063508
A fault detection method for a multi-phase converter is: sampling currents flowing through a plurality of switching circuits to generate a plurality of current sampling signals; generating a plurality of digital current signals based on a plurality of current sampling signals; generating a plurality of on-time adjustment signals based on differences between each of the plurality of digital current signals and a reference current signal; averaging the plurality of on-time adjustment…
Short to ground and open protecting circuit, and associated protecting method
Granted: July 6, 2021
Patent Number:
11057976
A short to ground protecting circuit for an LED driver for providing a power supply voltage for N LED strings. The LED driver has an output terminal for providing a power supply voltage for the N LED strings and N feedback terminals having N detecting voltages respectively. For each i from 1 to N, the ith LED string is coupled between the output terminal and the ith feedback terminal, and the ith feedback terminal is configured to have the ith detecting voltage. The short to ground…
LDMOS device with sinker link
Granted: June 29, 2021
Patent Number:
11049957
An LDMOS device with sinker link. The LDMOS device has a buried layer, a first well region and a sinker linking the buried layer and the first well region. The LDMOS device has a trench with its upper portion surrounded by the first well region and its lower portion surrounded by the sinker. The trench is formed so that the sinker can be formed by ion implantation through the trench. The trench is filled with non-conductive material.
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…
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…
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.
