Patents by Inventor Hsin-Hsin Ho
Hsin-Hsin Ho 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).
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Patent number: 8860384Abstract: A buck-boost power converter switches the switches thereof with a novel sequence and extends the switching periods of the switches to reduce the switching loss and conduction loss when the input voltage thereof approaches the output voltage thereof. The influence of the load current of the power converter on the duty thereof is taken into account to switch the power converter between modes at correct time points, so as to prevent the output voltage from being affected by the mode switching.Type: GrantFiled: August 22, 2012Date of Patent: October 14, 2014Assignees: Richtek Technology Corp., National Chiao Tung UniversityInventors: Ke-Horng Chen, Wei-Quan Wu, Hsin-Hsin Ho
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Patent number: 8692533Abstract: A buck-boost power converter switches the switches thereof with a novel sequence and extends the switching periods of the switches to reduce the switching loss and conduction loss when the input voltage thereof approaches the output voltage thereof. The influence of the load current of the power converter on the duty thereof is taken into account to switch the power converter between modes at correct time points, so as to prevent the output voltage from being affected by the mode switching.Type: GrantFiled: August 22, 2012Date of Patent: April 8, 2014Assignees: Ricktek Technology Corp., National Chiao Tung UniversityInventors: Ke-Horng Chen, Wei-Quan Wu, Hsin-Hsin Ho
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Patent number: 8664982Abstract: A buck-boost power converter includes a power stage to convert an input voltage to an output voltage, an error amplifier to generate an error signal according to a reference voltage and a feedback signal proportional to the output voltage, a ramp generator to provide two ramp signals, and two comparators to generate two control signals according to the error signal and the two ramp signals to drive the power stage. By using feed-forward technique, one of the two ramp signals has a peak varying with the input voltage and the other ramp signal has a valley varying with the input voltage, so that the power converter has fast line response.Type: GrantFiled: March 9, 2010Date of Patent: March 4, 2014Assignee: Richtek Technoloy Corp.Inventors: Ke-Horng Chen, Pin-Chin Huang, Hsin-Hsin Ho
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Patent number: 8610419Abstract: A buck-boost power converter switches the switches thereof with a novel sequence and extends the switching periods of the switches to reduce the switching loss and conduction loss when the input voltage thereof approaches the output voltage thereof. The influence of the load current of the power converter on the duty thereof is taken into account to switch the power converter between modes at correct time points, so as to prevent the output voltage from being affected by the mode switching.Type: GrantFiled: August 22, 2012Date of Patent: December 17, 2013Assignees: Richtek Technology Corp., National Chiao Tung UniversityInventors: Ke-Horng Chen, Wei-Quan Wu, Hsin-Hsin Ho
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Patent number: 8593122Abstract: A buck-boost power converter switches the switches thereof with a novel sequence and extends the switching periods of the switches to reduce the switching loss and conduction loss when the input voltage thereof approaches the output voltage thereof. The influence of the load current of the power converter on the duty thereof is taken into account to switch the power converter between modes at correct time points, so as to prevent the output voltage from being affected by the mode switching.Type: GrantFiled: March 9, 2010Date of Patent: November 26, 2013Assignees: Richtek Technology Corp., National Chiao Tung UniversityInventors: Ke-Horng Chen, Wei-Quan Wu, Hsin-Hsin Ho
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Publication number: 20120319669Abstract: A buck-boost power converter switches the switches thereof with a novel sequence and extends the switching periods of the switches to reduce the switching loss and conduction loss when the input voltage thereof approaches the output voltage thereof. The influence of the load current of the power converter on the duty thereof is taken into account to switch the power converter between modes at correct time points, so as to prevent the output voltage from being affected by the mode switching.Type: ApplicationFiled: August 22, 2012Publication date: December 20, 2012Applicant: RICHTEK TECHNOLOGY CORP.Inventors: KE-HORNG CHEN, WEI-QUAN WU, HSIN-HSIN HO
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Publication number: 20120313607Abstract: A buck-boost power converter switches the switches thereof with a novel sequence and extends the switching periods of the switches to reduce the switching loss and conduction loss when the input voltage thereof approaches the output voltage thereof. The influence of the load current of the power converter on the duty thereof is taken into account to switch the power converter between modes at correct time points, so as to prevent the output voltage from being affected by the mode switching.Type: ApplicationFiled: August 22, 2012Publication date: December 13, 2012Applicant: RICHTEK TECHNOLOGY CORP.Inventors: KE-HORNG CHEN, WEI-QUAN WU, HSIN-HSIN HO
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Publication number: 20120313608Abstract: A buck-boost power converter switches the switches thereof with a novel sequence and extends the switching periods of the switches to reduce the switching loss and conduction loss when the input voltage thereof approaches the output voltage thereof. The influence of the load current of the power converter on the duty thereof is taken into account to switch the power converter between modes at correct time points, so as to prevent the output voltage from being affected by the mode switching.Type: ApplicationFiled: August 22, 2012Publication date: December 13, 2012Applicants: NATIONAL CHIAO TUNG UNIVERSITY, RICHTEK TECHNOLOGY CORP.Inventors: KE-HORNG CHEN, WEI-QUAN WU, HSIN-HSIN HO
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Patent number: 7843177Abstract: A high efficiency control circuit for operating a switching regulator is provided. The switching regulator can regulate an output voltage no matter the input voltage is higher, lower, or close to the output voltage. The switching regulator has first, second, third and fourth switches. The control circuit can operate the switching regulator in buck mode, boost mode, or buck-boost mode. In a buck-boost mode, the control logic drives the four switches in an efficiency sequence for reducing energy consumption during the switch transition, on the other side, resistive loss owing to the energy transfer phase is also minimized. Furthermore, the invention is capable of control duty cycle limitation to fit the consideration of the linearity of the converter.Type: GrantFiled: October 31, 2007Date of Patent: November 30, 2010Assignee: Elite Semiconductor Memory Technology Inc.Inventors: Hsin-Hsin Ho, Ke-Horng Chen, Tzong-Honge Shieh
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Publication number: 20100231272Abstract: A buck-boost power converter includes a power stage to convert an input voltage to an output voltage, an error amplifier to generate an error signal according to a reference voltage and a feedback signal proportional to the output voltage, a ramp generator to provide two ramp signals, and two comparators to generate two control signals according to the error signal and the two ramp signals to drive the power stage. By using feed-forward technique, one of the two ramp signals has a peak varying with the input voltage and the other ramp signal has a valley varying with the input voltage, so that the power converter has fast line response.Type: ApplicationFiled: March 9, 2010Publication date: September 16, 2010Applicant: RICHTEK TECHNOLOGY CORP.Inventors: KE-HORNG CHEN, PIN-CHIN HUANG, HSIN-HSIN HO
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Publication number: 20100231189Abstract: A buck-boost power converter switches the switches thereof with a novel sequence and extends the switching periods of the switches to reduce the switching loss and conduction loss when the input voltage thereof approaches the output voltage thereof. The influence of the load current of the power converter on the duty thereof is taken into account to switch the power converter between modes at correct time points, so as to prevent the output voltage from being affected by the mode switching.Type: ApplicationFiled: March 9, 2010Publication date: September 16, 2010Applicant: RICHTEK TECHNOLOGY CORP.Inventors: KE-HORNG CHEN, WEI-QUAN WU, HSIN-HSIN HO
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Patent number: 7795754Abstract: The present invention discloses a slope control device capable of predicting uniform-current-sharing level and method thereof which can be applied in a redundancy or distributed power system for providing better uniform-current-sharing ability. The device comprises a high linearity transconductor circuit, a slope adjusting circuit and an incremental output voltage circuit. The invention applies either a transconductor parameter or a feedback resistor to increase the droop gain and therefore the current deviation between two power supply modules is reduced. The invention further raises the output voltage step by step to ensure that the output voltage meet the requirement of allowable minimum output voltage according to increment of load current.Type: GrantFiled: February 28, 2008Date of Patent: September 14, 2010Assignee: National Chiao Tung UniversityInventors: Hsin-Hsin Ho, Ke-Horng Chen, Chun-Yu Hsieh
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Publication number: 20090218885Abstract: The present invention discloses a slope control device capable of predicting uniform-current-sharing level and method thereof which can be applied in a redundancy or distributed power system for providing better uniform-current-sharing ability. The device comprises a high linearity transconductor circuit, a slope adjusting circuit and an incremental output voltage circuit. The invention applies either a transductor parameter or a feedback resistor to increase the droop gain and therefore the current deviation between two power supply modules is reduced. The invention further raises the output voltage step by step to ensure that the output voltage meet the requirement of allowable minimum output voltage according to increment of load current.Type: ApplicationFiled: February 28, 2008Publication date: September 3, 2009Applicant: NATIONAL CHIAO TUNG UNIVERSITYInventors: Hsin-Hsin Ho, Ke-Horng Chen, Chun-Yu Hsieh
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Patent number: 7560917Abstract: In a voltage regulator including an error amplifier to generate a first signal related to an output voltage of the voltage regulator, a current sense circuit to generate a second signal related to an inductor current of the voltage regulator, and a PWM comparator to generate a PWM signal in response to the first and second signals to regulate the output voltage, a current feed-through adaptive voltage position control comprises supplying ramp signal and offset signal to modify the PWM signal to thereby eliminate the offset of the output voltage.Type: GrantFiled: September 8, 2005Date of Patent: July 14, 2009Assignee: Richtek Technology Corp.Inventors: Hsin-Hsin Ho, Liang-Pin Tai, Hung-I Wang, Jian-Rong Huang, Jiun-Chiang Chen
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Publication number: 20090108823Abstract: A high efficiency control circuit for operating a switching regulator is provided. The switching regulator can regulate an output voltage no matter the input voltage is higher, lower, or close to the output voltage. The switching regulator has first, second, third and fourth switches. The control circuit can operate the switching regulator in buck mode, boost mode, or buck-boost mode. In a buck-boost mode, the control logic drives the four switches in an efficiency sequence for reducing energy consumption during the switch transition, on the other side, resistive loss owing to the energy transfer phase is also minimized. Furthermore, the invention is capable of control duty cycle limitation to fit the consideration of the linearity of the converter.Type: ApplicationFiled: October 31, 2007Publication date: April 30, 2009Applicant: ELITE MICROPOWER INC.Inventors: Hsin-Hsin Ho, Ke-Horng Chen, Tzong-Honge Shieh
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Publication number: 20060049815Abstract: In a voltage regulator including an error amplifier to generate a first signal related to an output voltage of the voltage regulator, a current sense circuit to generate a second signal related to an inductor current of the voltage regulator, and a PWM comparator to generate a PWM signal in response to the first and second signals to regulate the output voltage, a current feed-through adaptive voltage position control comprises supplying ramp signal and offset signal to modify the PWM signal to thereby elliminate the offset of the output voltage.Type: ApplicationFiled: September 8, 2005Publication date: March 9, 2006Inventors: Hsin-Hsin Ho, Liang-Pin Tai, Hung-I Wang, Jian-Rong Huang, Jiun-Chiang Chen
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Patent number: 6960905Abstract: In a time-sharing current sense circuit for a multi-phase converter, a common transconductive amplifier is selectively connected to the channels of the converter power stage by a plurality of first switches under the control of a set of control clocks to detect the channel current of a selected channel among the channels so as to generate a sense current, and a sense current generated by the common transconductive amplifier from the sensed channel current is switched by a plurality of second switches under the control of the same control clocks to connect to one of a plurality of sampling-and-holding circuits each corresponding to one of the channels to generate a current sense signal to modulate the channel current of the selected channel.Type: GrantFiled: April 21, 2004Date of Patent: November 1, 2005Assignee: Richtek Technology Corp.Inventors: Jiun-Chiang Chen, Hsin-Hsin Ho, Hung-I Wang, Liang-Pin Tai
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Publication number: 20050140347Abstract: In a time-sharing current sense circuit for a multi-phase converter, a common transconductive amplifier is selectively connected to the channels of the converter power stage by a plurality of first switches under the control of a set of control clocks to detect the channel current of a selected channel among the channels so as to generate a sense current, and a sense current generated by the common transconductive amplifier from the sensed channel current is switched by a plurality of second switches under the control of the same control clocks to connect to one of a plurality of sampling-and-holding circuits each corresponding to one of the channels to generate a current sense signal to modulate the channel current of the selected channel.Type: ApplicationFiled: April 21, 2004Publication date: June 30, 2005Inventors: Jiun-Chiang Chen, Hsin-Hsin Ho, Hung-I Wang, Liang-Pin Tai