Patents Assigned to Green Solution Technology Co., Ltd.
  • Patent number: 9923467
    Abstract: A multiphase converting controller, adapted to control a plural converting circuits coupled to an input voltage to commonly supply an output voltage, is disclosed. The multiphase converting controller comprises a feedback control circuit, an on-time control circuit, and a multiphase logic control circuit. The feedback control circuit determines a conduction starting point in time according to the output voltage and accordingly generates a conduction signal. The on-time control circuit determines a conduction time period. The multiphase logic control circuit controls the plural converting circuit in sequence in accordance to the conduction signal and the conduction time period. The on-time control circuit adjusts a length of the conduction time period according to a mode signal.
    Type: Grant
    Filed: April 2, 2013
    Date of Patent: March 20, 2018
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Quan Gan, Shian-Sung Shiu
  • Patent number: 9906161
    Abstract: A power conversion apparatus including a transformer, a synchronous rectification (SR) transistor and a SR controller is provided. The SR transistor is coupled between a secondary side of the transformer and an output terminal. The SR controller receives a cross voltage between a drain terminal and a source terminal of the SR transistor as a first detection signal. The SR controller obtains a first time length according to a voltage value of the first detection signal, a voltage value of a first trigger signal and a voltage value of a second trigger signal. The SR controller determines a time point to turn off the SR transistor according to the first time length.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: February 27, 2018
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventor: Chi-Lin Chen
  • Patent number: 9825460
    Abstract: A cable drop compensation circuit includes a current detection circuit, a compensation judgment circuit, and a compensation circuit. The current detection circuit detects a load current supplied to a load by a DC output circuit, so as to generate a current detection signal. The compensation judgment circuit receives the current detection signal, and generates a judgment signal when judging the load current higher than a predetermined compensation value. When receiving the judgment signal, the compensation circuit generates a compensation signal. In response to the compensation signal, the DC output circuit raises an output voltage by a compensation voltage.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: November 21, 2017
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Chen-Hsung Wang, Che Wang, Shian-Sung Shiu, Zhong-Wei Liu
  • Patent number: 9780772
    Abstract: A power supply device is provided. The power supply device includes a power transistor, a detection circuit and a driving circuit. The power transistor is controlled by the driving circuit to generate an output current. A first end of the power transistor is coupled to a power voltage pin through a first bonding wire. A second end of the power transistor is configured to output the output current. The detection circuit is coupled between two ends of the first bonding wire to detect the output current and generate a control signal. The driving circuit generates a driving signal according to the control signal. When the output current value is larger than or equal to an over-current-protection current value, the driving circuit starts to adjust a voltage value of the driving signal, such that the output current value is kept at the over-current-protection current value.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: October 3, 2017
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Zhong-Wei Liu, Shian-Sung Shiu, Ying-Ying Yang
  • Patent number: 9780671
    Abstract: A power conversion apparatus including a power converter, a first output port, a second output port, a load detection circuit and an output selection circuit is provided. The power converter generates a first and a second output voltages having different voltage specification. The first and the second output ports respectively provide the received output voltages to a back end. The load detection circuit is coupled with the power converter and the second output port and detects a load requirement of a load connected to the second output port to generate a load detection signal. The power converter generates a first switch control signal according to the load detection signal to control the output selection circuit, such that the output selection circuit provides one of the first and the second output voltages in response to the first switch control signal.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: October 3, 2017
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Chia-Ming Chan, Desi Pan, Shian-Sung Shiu, Li-Min Lee
  • Publication number: 20170093292
    Abstract: A power conversion apparatus including a power converter, a first output port, a second output port, a load detection circuit and an output selection circuit is provided. The power converter generates a first and a second output voltages having different voltage specification. The first and the second output ports respectively provide the received output voltages to a back end. The load detection circuit is coupled with the power converter and the second output port and detects a load requirement of a load connected to the second output port to generate a load detection signal. The power converter generates a first switch control signal according to the load detection signal to control the output selection circuit, such that the output selection circuit provides one of the first and the second output voltages in response to the first switch control signal.
    Type: Application
    Filed: September 8, 2016
    Publication date: March 30, 2017
    Applicant: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Chia-Ming Chan, Desi Pan, Shian-Sung Shiu, Li-Min Lee
  • Patent number: 9602093
    Abstract: A zero-crossing voltage detection circuit for detecting a phase voltage of a converter includes a comparator, a first transistor and a second transistor. The first transistor has a first base, a first collector and a first emitter. The first base couples with the first collector. The first emitter receives the phase voltage. The first collector provides a first voltage to a first terminal of the comparator. The second transistor has a second base, a second collector and a second emitter. The second base couples with the first base. The second base couples with the second collector. The second emitter receives a ground voltage. The second collector provides a second voltage to a second terminal of the comparator. The comparator compares the first voltage with the second voltage to generate a zero-crossing voltage signal.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: March 21, 2017
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Chao Shao
  • Patent number: 9575499
    Abstract: The invention is directed to a low-dropout voltage regulator (LDO), including a power transistor, a driving stage circuit, a feedback circuit, a bias power source and an auxiliary reference current generation circuit. The power transistor is controlled by a driving signal to convert an input voltage into an output voltage. The feedback circuit generates a feedback voltage according to the output voltage. The driving stage circuit generates the driving signal according to the feedback voltage and the reference voltage. The bias power source provides a bias current. The auxiliary reference current generation circuit is configured to sample an output current, adjust the sampled output current to generate an adjustment current by means of mapping and superpose the adjustment current onto the bias current to generate a reference current to control drive capability of the driving stage circuit.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: February 21, 2017
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Zhong-Wei Liu, Shian-Sung Shiu, Ying-Ying Yang
  • Patent number: 9543833
    Abstract: The present invention provides a constant on time controller packaged in one single package for controlling a buck converting circuit to convert an input voltage into an output voltage. The constant on time controller includes an input voltage detecting circuit, an on-time determining circuit and a driving circuit. The input voltage detecting circuit receives a bootstrap voltage to generate an input voltage detecting signal indicative of the input voltage. The on-time determining circuit receives the input voltage detecting signal and generates an on-time signal in response to the input voltage detecting signal and the output voltage. The driving circuit controls the buck converting circuit according to the n-time signal.
    Type: Grant
    Filed: April 17, 2014
    Date of Patent: January 10, 2017
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Shian-Sung Shiu, Chao Shao, Li-Min Lee
  • Patent number: 9467131
    Abstract: A delay circuit includes a current circuit, a first current mirror circuit, a second current mirror circuit, a self-compensation circuit, and a delay capacitor. A fixed ratio is between the first current and the second current provided by the current circuit. The first current mirror circuit generates a first mirror current in response to the first current. A partial current of the second current flowing through the second current mirror circuit is a base current, and the second current mirror circuit generates a second mirror current in response to the base current. The self-compensation circuit generates a feedback current in response to the second mirror current. The delay capacitor generates a delay signal. The charging current is equal to the second current subtracting the base current. The first mirror current is the sum of the base current, the second mirror current, and the feedback current.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: October 11, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Chao Shao, Ying-Ying Yang, Huan-Huan Zhang
  • Patent number: 9444271
    Abstract: A battery balance circuit is adapted to balance battery voltages among a plurality of battery cells. The battery balance circuit is enabled to perform a battery balance process when the battery cells are charged, and is disabled when one of the batter cells is fully charged or the battery cells are un-charged.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: September 13, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Han-Lin Li, Ping-Cheng Yeh, Chen-Hsung Wang, Shian-Sung Shiu
  • Patent number: 9444339
    Abstract: A DC-DC converter, adapted to control a converting circuit to convert an input voltage into an output voltage, is disclosed. The converting circuit comprises a switch module and an LC filter, the switch module is coupled to the input voltage, and the LC filter is coupled to the switch module and provides the output voltage. The DC-DC converter comprises a system control circuit, a driver circuit, and an output voltage adjusting circuit. The system control circuit generates a switch control signal according to a reference voltage and a state of the LC filter. The driver circuit controls the switch module according to the switch control signal for adjusting the output voltage in response to the reference voltage. The output voltage adjusting circuit determines whether adjusting the output voltage toward a predetermined adjusting voltage according to an adjusting reference voltage and a detecting voltage indicative of the output voltage.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: September 13, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Chao Shao, Shian-Sung Shiu, Quan Gan
  • Patent number: 9420654
    Abstract: A feedback control circuit, adapted to control a converting circuit to transform an input power into an output voltage for driving an LED module. The feedback control circuit comprises a detection circuit, a PWM circuit, a PWM logic control circuit and a PWM control circuit. The detection circuit is coupled to at least one LED string of the LED module and generates at least one detection signal. The PWM circuit comprises a capacitance, a charging circuit and a discharging circuit, and determines a capacitance voltage of the capacitance to increase, decrease, or maintain. The PWM logic control circuit compares a level of the least one detection signal with a high reference level and a low reference level to control the PWM circuit to adjust the capacitance voltage. The PWM control circuit controls the converting circuit to execute the power transformation in response to the capacitance voltage of the capacitance.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: August 16, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Shian-Sung Shiu, Chih-Chun Sung
  • Patent number: 9407149
    Abstract: A buck converting controller, adapted to control a DC-DC buck converting circuit to convert an input voltage into an output voltage, is disclosed. The buck converting controller comprises a feedback control circuit, an off-time determination circuit and a load control circuit. The feedback control circuit turns on and off a high-side transistor and a low-side transistor of the DC-DC buck converting circuit in response to a feedback signal indicative of the output voltage. The off-time determination circuit determines a preset off-time period according to the input voltage and the output voltage and generates an off notice signal according to the preset off-time period. The load control circuit is coupled to the DC-DC buck converting circuit and determines whether to release an electronic energy stored in the DC-DC buck converting circuit according to the off notice signal.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: August 2, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Chao Shao, Zhong-Wei Liu
  • Patent number: 9407147
    Abstract: A multiphase converter controller with current balance, configured to control a plural converting circuit to commonly supply an output voltage, is disclosed. The multiphase converter controller comprises a feedback circuit, a fixed on-time circuit, and a multiphase logical circuit. The feedback circuit detects the output voltage to generate a feedback control signal. The fixed on-time circuit generates an on-time signal according to the feedback control signal, and a pulse width of the on-time signal is determined according to a single timer. The multiphase logical circuit chooses a corresponding converting circuit, generates a phase signal according to a sequence of the feedback control signal and controls the corresponding converting circuit according to the on-time signal. Wherein, the fixed on-time circuit determines a correction value according to currents of the plural converting circuit and the phase signal, so as to correct the pulse width of the on-time signal.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: August 2, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Quan Gan, Shian-Sung Shiu, Chao Shao
  • Patent number: 9350347
    Abstract: A level shift circuit and a DC-DC buck converter controller for using the same are disclosed. The level shift circuit is capable of detecting a state of a converting circuit, and avoids a current leakage when determining that the converting circuit is operating under a light-load. Therefore, the level shift circuit and the DC-DC converting controller provided by the present invention can reduce power consumption under the light-load and have power-saving advantage.
    Type: Grant
    Filed: March 9, 2014
    Date of Patent: May 24, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Chao Shao, Quan Gan, Yuan Cai
  • Patent number: 9313841
    Abstract: The present invention provides an LED current balance apparatus, which utilities capacitances coupled to secondary windings of a transformer to store voltage differences between LED strings. Thereby, the driving voltages applied to LED strings are respectively modulated to make the LED strings flowing through a same driving current. A current regulating apparatus is coupled to all LED strings to stabilize total current of the LED strings at a predetermined current.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: April 12, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Chung-Che Yu, Shian-Sung Shiu, Chia-Ming Chan, Li-Min Lee
  • Patent number: 9293989
    Abstract: A programmable on-time period of a DC to DC buck converting controller is adjusted according to a level of a preset output voltage or a reference signal. Therefore, the DC to DC buck converting controller of the present invention is suitable for any applications with different requests of output voltages or different operating mode.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: March 22, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Chung-Che Yu, Shian-Sung Shiu, Chao Shao, Quan Gan
  • Patent number: 9288853
    Abstract: The present invention discloses an LED driving circuit and controller, capable of maintaining an average value of a current flowing through an LED module at a predetermined current value. The LED driving circuit and controller compensates influences of any factors deviating the average value of the current flowing through the LED module by modulating a period of constant on time or constant off time, or by modulating the determining value(s) of current peak value and/or current valley value according to a difference between an actual average value and the preset current value.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: March 15, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventor: Chung-Che Yu
  • Patent number: 9263945
    Abstract: A constant on time control circuit, configured to control a converting circuit to transform an input voltage into a stable output voltage, is disclosed. The constant on time control circuit comprises a comparing circuit and a logic circuit. The comparing circuit compares a reference signal and a voltage signal indicative of the output voltage and accordingly outputs a compared result signal. The logic circuit periodically controls the converting circuit to perform voltage transformation and makes a time period of a duty cycle in every cycle being substantially constant. A start point in time of every cycle is determined according to the compared result signal. The comparing circuit comprises a differential pair, a base current source and an extra current source. The base current source provides a bias current to the differential pair. The extra current source provides a substantial ramp current to one channel in the differential pair.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: February 16, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Li-Min Lee, Chao Shao, Shian-Sung Shiu, Quan Gan