Patents Assigned to Monolithic Power Systems
  • Voltage regulators with controlled output voltage and the method thereof
    Patent number: 10756621
    Abstract: A voltage regulator provides an output voltage and an output current. The output voltage decreases with an increase of the output current when the output current is lower than a current breaking point, and the output voltage is maintained when the output current reaches the current breaking point.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: August 25, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Binci Xu, Yongliang Wang, Tao Zhao, Lijie Jiang
  • Voltage regulator and associated auto-loop regulation system and method
    Patent number: 10725938
    Abstract: An auto-loop regulation system for a voltage regulator receives a plurality of pre-determined loop parameters through an interactive computing equipment, and the voltage regulator operates according to the plurality of pre-determined loop parameters, wherein the interactive computing equipment regulates at least one of the loop parameters automatically in real time according to an online loop value when the voltage regulator is operating online, and the interactive computing equipment keeps regulating the loop parameters until the online value of the voltage regulator matches with a target value.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: July 28, 2020
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Lijie Jiang, Xiaokang Wu, Suhua Luo, Qian Ouyang
  • Power converter with improved load transient response and associated control method
    Patent number: 10727742
    Abstract: A power converter including a load transient enhancing module and associated method for improving load transient response of the power converter. The load transient enhancing module detects whether load transient is occurring in a load of the power converter, and turns the secondary switch off and locks the secondary switch at “OFF” state to turn on a body diode of the secondary switch once load transient is occurring in the load.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: July 28, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Changjiang Chen, Lei Li
  • Single stage multi-outputs circuit and a method thereof
    Patent number: 10715044
    Abstract: A control circuit of a power converter providing at least a first output voltage and a second output voltage, having: a first loop control circuit, configured to provide a first error amplifying signal based on the first output voltage and a first reference voltage; a second loop control circuit, configured to provide a second error amplifying signal based on the second output voltage and a second reference voltage; a saturation detecting circuit, configured to provide a saturation indicating signal based on the first error amplifying signal and a saturation reference signal; and a first current source circuit, configured to charge an output terminal of the second error amplifier based on the saturation indicating signal.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: July 14, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Bairen Liu, Shufa Jiang, Bo Yu
  • Symmetrical power stages for high power integrated circuits
    Patent number: 10693378
    Abstract: A circuit assembly for a power converter includes a substrate, power stage integrated circuit (IC) dies, and output inductors that connect switch nodes of the power stage IC dies to an output node of the power converter. The power stage IC dies are mounted on one side of the substrate and the output inductors are mounted on an opposing side of the substrate. Two output inductors go through a magnetic core. A heatsink is attached to surfaces of the power stage IC dies. A power stage IC die has a pair of switching transistors, and a switch node formed by the switching transistors is connected by an output inductor to the output node of the power converter.
    Type: Grant
    Filed: January 16, 2020
    Date of Patent: June 23, 2020
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Jinghai Zhou, Chia-Hsin Chang
  • Circuit with reduced light load power dissipation and a method thereof
    Patent number: 10673331
    Abstract: A feedback block used with an isolated switching converter, having: a variable resistance circuit receiving a resistance control signal and having an equivalent resistance in proportional to a duty cycle of the resistance control signal; and a resistance control circuit, configured to provide the resistance control signal based on a load of the isolated switching converter; wherein the duty cycle of the resistance control signal varies in response to the load of the isolated switching converter.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: June 2, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Wenbin Lu, Lei Miao
  • Multiphase charging circuit with improved transient response and control method thereof
    Patent number: 10673268
    Abstract: A multiphase charging circuit includes a first phase having a first switch and a second phase having a second switch to provide a system voltage for a system load, a control method of the multiphase charging circuit includes: generating a plurality of feedback control signals with generating each of feedback control signal based on a corresponding feedback signal, a ramp signal, a corresponding reference signal and a current flowing through the first phase; selecting one of the plurality of feedback control signals as a first enable signal; generating a first control signal of the first switch based on the first enable signal and a first time period control signal; generating a second enable signal by shifting a pre-determined phase difference to the first control signal; and generating a second control signal of the second switch based on the second enable signal and a second time period control signal.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: June 2, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Min Xu
  • DC-DC converter with droop regulation
    Patent number: 10673336
    Abstract: A DC-DC converter with droop regulation for better transient performance. The DC-DC converter includes a switching circuit, a comparison circuit and a logic control circuit. A differential voltage indicative of an output voltage of the switching circuit, and a droop voltage indicative of an output current of the switching circuit, are generated. A high-pass filtered signal is obtained by high-pass filtering the droop voltage. The comparison circuit responds to the differential voltage, a reference voltage and the high-pass filtered signal to generate a set signal. The logic control circuit generates a control signal based on the set signal to control the switching circuit.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: June 2, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Lijie Jiang, Xiaokang Wu, Binci Xu
  • Switching power supply circuit with synchronous rectification and associated control method
    Patent number: 10673344
    Abstract: 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 control the rectifier switch being fully on for a predetermined duration. After a predetermined duration, the secondary side control circuit adjusts the voltage of the driving signal based on the drain-source voltage across the rectifier switch and a second threshold value.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: June 2, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Siran Wang
  • LDMOS device with a field plate contact metal layer with a sub-maximum size
    Patent number: 10665712
    Abstract: An LDMOS device with a field plate contact having a field plate contact metal layer being positioned above the field plate contact. The field plate contact metal layer has a sub-maximum size satisfied for the electrical connection between the field plate contact and an external applying voltage. This sub-maximum size is prescribed by the physical limitation of the LDMOS device. The field plate contact metal layer extends a sub-maximum length from one edge toward to the other edge of the field plate contact.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: May 26, 2020
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Eric Braun, Joel McGregor, Jeesung Jung
  • COT control circuit and associated DC-DC converter
    Patent number: 10666272
    Abstract: A COT control circuit for DC-DC converter. The COT control circuit has a synchronizing signal generator, an on time generator and a frequency locking circuit. The synchronizing signal generator generates a synchronizing signal and a frequency-modulated signal. The on time generator receives an input voltage signal, an output voltage signal, an error signal and the frequency-modulated signal to generate an on time signal. The error signal is generated by the frequency locking circuit based on the on time signal and the synchronizing signal. The operation frequency of a steady state of the DC-DC converter is regulated through changing the value of the frequency-modulated signal.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: May 26, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Lei Li
  • Battery pack and discharge method for limiting an excessive discharge current
    Patent number: 10658856
    Abstract: A battery management system (BMS) used in a battery pack, the battery pack has a discharging switch coupled between a battery and a load, and the load has a capacitor charged by the battery pack. The BMS has a driver circuit having a power supply terminal to receive a drive voltage, a ground reference terminal coupled to receive the battery pack voltage and an output terminal coupled to a control terminal of the discharging switch. The BMS generates a normal drive voltage and a ramp drive voltage, and the normal drive voltage is selected as the drive voltage when the voltage difference between the battery voltage and the battery pack voltage is less than a threshold voltage, and the ramp drive voltage is selected as the drive voltage when the voltage difference between the battery voltage and the battery pack voltage is higher than the threshold voltage.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: May 19, 2020
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Paolo Baruzzi, Kai Chen
  • SYMMETRICAL POWER STAGES FOR HIGH POWER INTEGRATED CIRCUITS
    Publication number: 20200153341
    Abstract: A circuit assembly for a power converter includes a substrate, power stage integrated circuit (IC) dies, and output inductors that connect switch nodes of the power stage IC dies to an output node of the power converter. The power stage IC dies are mounted on one side of the substrate and the output inductors are mounted on an opposing side of the substrate. Two output inductors go through a magnetic core. A heatsink is attached to surfaces of the power stage IC dies. A power stage IC die has a pair of switching transistors, and a switch node formed by the switching transistors is connected by an output inductor to the output node of the power converter.
    Type: Application
    Filed: January 16, 2020
    Publication date: May 14, 2020
    Applicant: Monolithic Power Systems, Inc.
    Inventors: Jinghai ZHOU, Chia-Hsin CHANG
  • Multi-phase converter and associated control circuit and control method for undershoot improvement
    Patent number: 10651721
    Abstract: A multi-phase converter has a plurality of switching circuits coupled in parallel and a control circuit. The control circuit provides a set signal to successively turn ON the switching circuits under power operation based on an output voltage, a reference signal and a nonlinear control signal. When a number of switching circuits under power operation decreases, the nonlinear control signal increases to a preset value from an initial value, and then the nonlinear control signal decreases to the initial value with a preset slew rate.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: May 12, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Xiaokang Wu, Lijie Jiang, Suhua Luo
  • Current sampling circuit applied to a multi-mode circuit and associated control method
    Patent number: 10651738
    Abstract: A multi-mode circuit has a first switch, a second switch, a third switch and a fourth switch. A current sampling circuit applied to the buck-boost has a first sampling circuit, a second sampling circuit and a current processing circuit. The first sampling circuit generates a first sampling current by sampling the current flowing through the first switch, the second sampling circuit generates a second sampling current by sampling the current flowing through the second switch, and the current processing circuit generates a third sampling current based on the first sampling current and the second sampling current. An average value of the third sampling current of one cycle represents the output current of the multi-mode circuit.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: May 12, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Junyong Gong, Jian Zhang
  • Charging mode auto-detection module for charging circuit and associated method
    Patent number: 10637256
    Abstract: A charging mode auto-detection module for a charging circuit and associated charging mode auto-detection method. The charging mode auto-detection module compatibly includes a voltage dividing charging mode, a BC1.2 mode, a SAMSUNG 1.2V/1.2V charging mode and a QC3.0 mode and can detect which of the charging modes is an adaptable charging mode to a needing to be charged device and generate an indication signal indicative of a required charging voltage by the needing to be charged device so that the charging circuit can regulate its bus voltage to the required charging voltage based on the indication signal.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: April 28, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Junyong Gong, Changjiang Chen, Jian Jiang
  • High brightness LED matrix driving system
    Patent number: 10631376
    Abstract: A LED driving system for a LED matrix having a plurality of LEDs connected in parallel. The LED driving system includes a plurality of driving modules. Each one of the plurality of driving modules drives a corresponding one of the plurality of LEDs. The plurality of LEDs are divided into a plurality of groups. The plurality of driving modules drive the plurality of LEDs ON successively group by group. In each one of the plurality of groups, the LESs are driven ON successively row by row, and for each row in each one of the plurality of groups, the LEDs are driven ON successively column by column with a programmed delay time between the LEDs in every two successive columns. Each one of the plurality of driving modules can include a grayscale control module for adjusting a brightness of the corresponding one of the plurality of LEDs.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: April 21, 2020
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Zheng Luo, Junjian Zhao, Chao Liu, Tong Chen, Yu-Huei Lee
  • Autonomous power system and associated control method
    Patent number: 10620677
    Abstract: An autonomous power system has a voltage regulator which converts an input voltage to an output voltage according to a reference voltage. A control method for the power system: receiving a voltage identification code sent by a processor; providing an autonomous voltage identification code when the voltage identification sent by the processor keeps constant during a first preset duration, wherein the autonomous voltage identification code can be updated self-adaptively; providing a reference voltage according to a sum of the voltage identification code and the autonomous identification code; and adjusting the output voltage according to the reference voltage.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: April 14, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Reagan Luo, Qian Ouyang, Lijie Jiang, Marvin Ma, Xiaokang Wu
  • Short/open protecting circuit and a method thereof
    Patent number: 10624172
    Abstract: A short protecting circuit for a LED (Light-emitting Diode) driver for powering a plurality of LED strings, having: a short comparing circuit, configured to provide a plurality of short fault indicating signals; a first logic circuit, configured to provide a short fault signal based on the plurality of short fault indicating signals to indicate a short fault condition; a timing circuit, configured to provide a short protecting enable signal; and a second logic circuit, configured to provide a plurality of short isolating signals; wherein the short isolating signals are blocked when an open fault signal is valid.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: April 14, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Bo Yu, Junxin Tan, Taofeng Li, Shufa Jiang, Li Yang
  • Isolated power supply circuit and associated control method
    Patent number: 10622880
    Abstract: An isolated power supply circuit has a first reference ground, a second reference ground, a power source, a first receiving circuit, a second receiving circuit, a first inverter circuit, a second inverter circuit and an isolated conversion circuit. The first reference ground and the second reference ground are isolated from each other. The first receiving circuit is coupled to the first reference ground. The second receiving circuit is coupled to the second reference ground. The power source provides a first power signal for the first receiving circuit directly. The first inverter circuit and the second inverter circuit receive the first power signal and produce a first inverter signal and a second inverter signal. And the isolated conversion circuit outputs a second power signal to the second receiving circuit based on the first inverter signal and the second inverter signal.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: April 14, 2020
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Yike Li