Multi-input single output power system and operating method thereof
Granted: May 10, 2022
Patent Number:
11329556
A multi-input single output power system for outputting an output voltage on an output node. It includes a first integrated circuit (IC) converter device and a second IC converter device. The first IC converter device has a first pin to receive a first input voltage, a second pin to output the output voltage, and a first power unit coupled between the first pin and the second pin. The second IC converter device has a first pin to receive a second input voltage, a second pin to output the…
Adaptive feedback control in LED driving circuits
Granted: April 19, 2022
Patent Number:
11310879
A feedback control circuit in an LED driving circuit for driving a plurality of LED strings. Each LED string provides a headroom detecting voltage. The feedback control circuit has a status detecting circuit, a counting circuit and a modulating circuit. The status detecting circuit compares each headroom detecting voltage with a low headroom threshold voltage and a high headroom threshold voltage and generates an up self-status signal and a down self-status signal. The counting circuit…
Control circuit for multi-phase voltage regulator and associated control method
Granted: April 12, 2022
Patent Number:
11303204
A trans-inductor voltage regulator (TLVR) circuit has multiple phases and a switching circuit for each phase. Each switching circuit has a winding of a transformer as an output inductor. The other windings of the transformers are connected in series with a nonlinear compensation inductor. An on-time period of each switching circuit is reduced when a load transient condition occurs or when a load current starts to be stable after the load transient condition.
Controller for a multi-phase converter and fault detection method thereof
Granted: March 22, 2022
Patent Number:
11283358
A fault detection method is sampling currents flowing through a plurality of switching circuits to generate a plurality of current sampling signals, generating a first reference signal and a second reference signal based on a predetermined reference signal and a ripple threshold signal, and generating a plurality of fault signals based on comparison results of each of the plurality of current sampling signals with the first reference signal and the second reference signal. When one of…
FET device insensitive to noise from drive path
Granted: March 22, 2022
Patent Number:
11282959
A FET device has a substrate, a plurality of repetitive source stripes, a first layout of drain stripe having a first drift region and a first drain region, a second layout of drain stripe having a second drift region and a second drain region, a first drain contactor contacted with the first drain region and connected to a drain terminal, a second drain contactor contacted with the second drain region and connected to a first gate terminal, a source contactor contacted with a source…
Controller and control method used in resonant converters
Granted: March 15, 2022
Patent Number:
11277071
A control circuit used in a resonant converter with a switching circuit and a resonant circuit is provided, the switching circuit has a high side transistor and a low side transistor, the resonant circuit has a resonant capacitor and a resonant inductor. The control circuit includes: a calculating module used to generate an output current calculating value based on a voltage across the resonant capacitor and a correction signal at an off moment of the high side transistor; a comparing…
Resonant converter circuit with switching frequency control based on input voltage
Granted: February 22, 2022
Patent Number:
11258368
A control method for regulating the switching frequency of a resonant converter having an input terminal to receive an input voltage and an output terminal to output an output voltage. The control method is sensing the input voltage and adjusting the switching frequency based on the comparison of the input voltage with a reference threshold voltage. When the input voltage is less than the reference threshold voltage, the switching frequency is adjusted to decrease, and when the input…
Circuit for driving synchronous rectifier device with false turn on prevention
Granted: February 8, 2022
Patent Number:
11245327
A driving circuit for driving a synchronous rectifier device. The driving circuit may include a controllable clamping circuit having a first terminal coupled to a sensing terminal of the driving circuit, a second terminal coupled to a reference ground terminal of the driving circuit, a third terminal coupled to a driving terminal of the driving circuit, and a control terminal configured to receive a supply indication signal indicative of a voltage potential at a supply terminal of the…
Switching converter and a method thereof
Granted: February 8, 2022
Patent Number:
11245324
A control circuit having: a logic circuit, configured to provide a high side boot-strap capacitor control signal set and a low side boot-strap capacitor control signal set; a high side boot-strap capacitor control circuit, configured to provide a high side power signal to control a high side power switch; a high side boot-strap capacitor, having a first terminal coupled to a control terminal of the high side power switch, and a second terminal coupled to the high side boot-strap…
Switching mode power supply providing an over current protection with anti-surge function
Granted: February 1, 2022
Patent Number:
11239743
A switching mode power supply preventing false triggering of an over current protection due to a surge pulse. The switching mode power supply has a switch and an inductor. An inductor current flows through the inductor. The switching mode power supply turns off the switch and meanwhile starts timing for a preset period of time when the inductor current is larger than a preset value. The switch is kept off during the preset period of time and is then turned on when the preset period of…
Charging termination control module and battery charger circuit
Granted: January 25, 2022
Patent Number:
11233418
A charging termination control module and a battery charger circuit comprising the same. The charging termination control module may detect/monitor/sense a charging current flowing through a charging control transistor of the battery charger circuit to provide a current sense signal, and to maintain a transistor voltage drop across the charging control transistor at a predetermined difference value once the transistor voltage drop reaches the predetermined difference value. The charging…
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…
