Control circuit for DC-DC converters with current limit and control method thereof
Granted: February 4, 2025
Patent Number:
12218589
A control circuit for a DC-DC converter has an over-current comparison circuit, an adaptive voltage position (AVP) control circuit and a switching control circuit. The over-current comparison circuit provides an over-current comparison signal by comparing an output current with a current limit value. The AVP control circuit provides a position signal based on a voltage identification code, an output voltage, an output current and the over-current comparison signal. The switching control…
Control circuit for DC-DC converters with nonlinear adaptive voltage position and control method thereof
Granted: February 4, 2025
Patent Number:
12218573
A control circuit for a DC-DC converter has an adaptive voltage position (AVP) control circuit and a switching control circuit. The AVP control circuit generates a position signal based on an output voltage, an output current, a voltage identification code and a set of adaptive voltage control commands. The switching control circuit generates a switching control signal based on the position signal to control the DC-DC converter. When the output current is smaller than a current…
Power chip with a multi-function pin
Granted: January 21, 2025
Patent Number:
12206411
A power chip with a switching converter, having: a power pin configured to receive an input voltage, an indicating signal generating circuit configured to generate an indicating signal; a communicating circuit configured to receive/transmit communication data; and a multi-function pin configured to receive/transmit communication data and/or to provide the indicating signal under certain conditions.
Adaptive inductor DCR current sensing circuit in a switching converter and associated method
Granted: January 21, 2025
Patent Number:
12206320
A DCR current sensing circuit used in a switching converter having a power switch and an inductor. The DCR current sensing circuit has a current sensing capacitor coupled in series with a current sensing resistor to form a RC circuit, a current mirror, a first and a second compensation circuits, wherein the RC circuit is coupled in parallel with the inductor. The current mirror generates a first mirror current signal and a second mirror current signal based on a voltage across the…
Single sided channel mesa power junction field effect transistor
Granted: January 21, 2025
Patent Number:
12206028
Junction field effect transistors (JFETs) and related manufacturing methods are disclosed herein. A disclosed JFET includes a vertical channel region located in a mesa and a first channel control region located on a first side of the mesa. The first channel control region is at least one of a gate region and a first base region. The JEFT also includes a second base region located on a second side of the mesa and extending through the mesa to contact the vertical channel region. The…
Controller for driving a power switch in slave phase of a multiphase power converter and power converter comprising the same
Granted: January 14, 2025
Patent Number:
12199517
A power converter includes a controller for driving a corresponding power switch in the power converter. The controller may have a current sense terminal adapted to sense/receive a current sense signal indicative of a current flowing through the corresponding power switch and a current limit terminal adapted to receive a reference current sense signal indicative of a current flowing through another power switch in the power converter. The controller may turn off the corresponding power…
Control circuit for a totem pole power factor correction circuit and the method thereof
Granted: January 14, 2025
Patent Number:
12199504
A totem pole PFC (Power Factor Correction) circuit, having: a first switch, a second switch and a control circuit. When the totem pole PFC circuit works in CCM (Continuous Current Mode), the control circuit is configured to turn on a main switch when a current detecting signal indicative of an AC input current of the totem pole PFC circuit decreases to a current valley reference signal, and keep the main switch ON for a first on-time period. When the totem pole PFC circuit works in DCM…
Charge pump with improved light-load efficiency and control method thereof
Granted: December 31, 2024
Patent Number:
12184171
A charge pump comprises two bridge arms coupled in parallel, two capacitors, and a control circuit. Each bridge arm has two pairs of switches coupled in series, each pair of switches having two switches coupled in series through a common node. Each capacitor is connected between the two common nodes of the corresponding bridge arm. The control circuit provides a mode signal by comparing an output voltage of the charge pump with two threshold voltages via a hysteretic comparison, and…
Control circuit of switching mode power supply and control method thereof
Granted: December 17, 2024
Patent Number:
12170486
A method for controlling a switching mode power supply is disclosed. An auxiliary winding feedback voltage of the switching mode power supply is sampled and held to obtain an auxiliary winding sample hold voltage. The auxiliary winding feedback voltage is sampled and held at an inflection point time to obtain an auxiliary winding inflection point voltage when the switching mode power supply operates in DCM or CRM. A secondary rectifier forward voltage signal is generated based on the…
Flip chip package unit comprising thermal protection film and associated packaging method
Granted: December 3, 2024
Patent Number:
12159792
A flip chip package unit and associated packaging method. The flip chip package unit may include an integrated circuit (“IC”) die having a plurality of metal pillars formed on its first surface and attached to a rewiring substrate with the first surface of the IC die facing to the rewiring substrate, an under-fill material filling gaps between the first surface of the IC die and the rewiring substrate, and a thermal conductive protection film covering or overlaying and directly…
Power module with output inductors and output capacitors that are embedded within substrate layers
Granted: October 15, 2024
Patent Number:
12120822
A power module has a printed circuit board (PCB) having an output inductor substrate layer and an output capacitor substrate layer. Power converters of the power module are implemented using monolithic integrated circuit (IC) switch blocks that are mounted on a surface of the power module. Output voltages of the power converters are provided at output voltage nodes. The power converters include output inductors that are embedded within the output inductor substrate layer and output…
Trans-inductor voltage regulators with fault detection and the fault detection method thereof
Granted: October 8, 2024
Patent Number:
12113432
A trans-inductor voltage regulator with fault detection has a plurality of transformers. Each transformer of the plurality of the transformers has a primary winding coupled to a switching circuit, and a secondary winding. Each secondary winding of each transformer of the plurality of transformers are coupled in series with a compensation inductor. The trans-inductor further has a controller operable to detect a) a short condition in a secondary side of each transformer of the plurality…
Low-profile power module
Granted: September 17, 2024
Patent Number:
12095369
A power module has a substrate with a bottom side and a component side. Power converters of the power module are implemented using monolithic integrated circuit (IC) switch blocks that are mounted on the component side of the substrate. The power converters include output inductors that are disposed within the substrate. An end of an output inductor is connected to a switch node of a monolithic IC switch block and another end of the output inductor is connected to an output voltage node…
Resonant converter with multiple resonant tank circuits
Granted: September 10, 2024
Patent Number:
12088195
A resonant converter has a primary resonant tank circuit and a secondary resonant tank circuit. An inverter circuit converts an input DC voltage received by the resonant converter at an input voltage node to a pulsating signal that is fed to the primary resonant tank circuit to generate a resonant tank current that flows through a primary winding of a transformer. The resonant tank current induces current in a secondary winding of the transformer. The induced current is rectified by a…
Efuse circuit and control method thereof
Granted: September 3, 2024
Patent Number:
12081016
A method for controlling an efuse circuit is provided. The method includes the following steps. A sample signal of a switch is provided. An error signal is generated according to the sample signal and a reference signal. The error signal is compared with a threshold. A voltage across a control node of the switch and an output node of the switch is clamped to a preset voltage value when the error signal is greater than the threshold.
Multi-phase switching converter under a phase-added operation and control method thereof
Granted: August 27, 2024
Patent Number:
12074518
This disclosure provides a control method for multi-phase switching converter having a master phase and at least one slave phase. The control method comprises: providing a pulse signal with 0.5 duty cycle by frequency-dividing a master control signal supplied to the master phase; and for each slave phase to be enabled, setting a ratio of a charge current and a discharge current based on a slave phase number under a phase-added operation, charging a first capacitor with the charge current…
Switching converter compatible with super capacitor and control circuit thereof
Granted: August 20, 2024
Patent Number:
12068686
A control circuit used in a switching converter having a switch and an inductor. The control circuit has an error amplifying circuit, a current comparing circuit, a clock generator and a constant OFF time generator. The error amplifying circuit receives a voltage reference signal and a voltage feedback signal indicative of an output voltage signal, and provides an error signal. The current comparing circuit compares the error signal with a current sensing signal indicative of a current…
Switching regulator with THD and PF compensation, the control circuit and the method thereof
Granted: July 23, 2024
Patent Number:
12046995
A switching regulator converts an AC input voltage into an output voltage, to power a load. The switching regulator includes a power stage having a main power switch. The main power switch has different ON time durations under different AC input voltage conditions and different load currents.
Voltage regulation at load transients
Granted: July 16, 2024
Patent Number:
12040711
A multiphase converter provides an output voltage to a load. The multiphase converter receives a load event signal from the load and turns ON at a same time the phases of the multiphase converter to increase the output voltage in response to the load event signal indicating that a load current drawn by the load from the multiphase converter is about to increase. The multiphase converter increases an impedance of low-side switches of the multiphase converter in response to the load event…
Power loss prevention circuit with mitigation for failed energy storage banks
Granted: June 11, 2024
Patent Number:
12007821
A power management integrated circuit (PMIC) chip provides power loss protection to an application device. The PMIC chip has several storage pins that each receives a set of storage capacitors that are charged using power from a power source during normal operation. An application device receives power from the power source during normal operation and receives power from an operational set of storage capacitors during power loss. A failing set of storage capacitors is disconnected from…
