Patents by Inventor Shian Sung Shiu

Shian Sung Shiu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 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
  • Publication number: 20170346284
    Abstract: This invention provides a power switch circuit and a power circuit using the power switch circuit. In particular, the power switch circuit includes a first reverse current monitoring circuit and a second reverse current monitoring circuit. The first reverse current monitoring circuit is coupled to a power transistor, and is configured to detect whether a reverse current flows through the power transistor to a voltage input terminal for a predetermined period of time, and only if yes, turn off the power transistor. The second reverse current monitoring circuit is coupled to the power transistor, and is configured to detect whether a reverse current flows through the power transistor to the voltage input terminal, and if yes, turn off the power transistor immediately. As such, the reverse current can be blocked in time from further flowing to the voltage input terminal, thereby avoiding a damage to the interior electronic components of the power source at the low voltage side.
    Type: Application
    Filed: March 2, 2017
    Publication date: November 30, 2017
    Inventors: Li-Min LEE, Zhong-Wei LIU, Shian-Sung SHIU, Yong-Heng JIANG
  • 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: 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: 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: 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: 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: 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
  • Publication number: 20160191049
    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: Application
    Filed: November 23, 2015
    Publication date: June 30, 2016
    Inventors: Li-Min Lee, Zhong-Wei Liu, Shian-Sung Shiu, Ying-Ying Yang
  • 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
  • Publication number: 20160048148
    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: Application
    Filed: July 20, 2015
    Publication date: February 18, 2016
    Inventors: Li-Min Lee, Zhong-Wei Liu, Shian-Sung Shiu, Ying-Ying Yang
  • 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
  • Patent number: 9232605
    Abstract: A load driving circuit comprises a converting circuit, a converting controller, a load driving modulator, and a charge spike protection circuit. The converting circuit is adapted to be coupled to an output power source and supplies a driving power source to drive a load. The converting circuit has an output capacitance coupled to an output end thereof. The converting controller controls an amount of the driving power source responsive to a current or a voltage of the load. The load driving modulator and the load, connected in series, are coupled to the output end and so the load driving modulator adjusts an electronic state of the load. The charge spike protection circuit is coupled to the output capacitance and at least one connecting node of the load and the load driving modulator to provide a unidirectional charge release path to the output capacitance.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: January 5, 2016
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Shian-Sung Shiu, Chia-Ming Chan
  • Publication number: 20150333514
    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: Application
    Filed: May 7, 2015
    Publication date: November 19, 2015
    Inventors: Chen-Hsung WANG, Che WANG, Shian-Sung SHIU, Zhong-Wei LIU
  • Patent number: 9166490
    Abstract: The present invention provides a full-bridge driving controller and a full-bridge converting circuit, which have the function of soft switch, to provide a DC output voltage. The present invention employs a resonant unit to oscillate the current flowing through the converting circuit at a resonant frequency. The full-bridge driving controller switches four full-bridge transistor switches at an operating frequency higher than the resonant frequency, so as to achieve the function of soft switch.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: October 20, 2015
    Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
    Inventors: Chung-Che Yu, Shian-Sung Shiu, Li-Min Lee