1
Chun Kai Derrick Wei, Kuan Yeu Chen, Hung I Wang, Song Yi Lin: DC power converter and mode-switching method. MStar Semiconductor, WPAT PC, Justin King, December 27, 2011: US08085013 (102 worldwide citation)

A DC converter and a mode-switching method used in an electronic apparatus are included. The electronic apparatus includes a subsystem circuit. The DC power converter comprises a first voltage converting circuit electrically connected to the subsystem circuit, receiving a system voltage and a first ...


2
Hung I Wang, Shwu Liang Hsieh, Liang Pin Tai, Jing Meng Liu: Multi-phase DC-to-DC buck converter with multi-phase current balance and adjustable load regulation. Richtek Technology, Rosenberg Klein & Lee, December 30, 2003: US06670794 (37 worldwide citation)

To balance the current of individual channel as well as regulate the output voltage for a multi-phase DC-to-DC buck converter, the converter output voltage is sensed and compared with a reference signal to produce a first error signal serving as first control signal for PWM signals of the converter ...


3
Liang Pin Tai, Shwu Liang Hsieh, Hung I Wang, Jing Meng Liu: Two-step ripple-free multi-phase buck converter and method thereof. Richtek Technology, Rosenberg Klein & Lee, January 4, 2005: US06839252 (31 worldwide citation)

A two-step ripple-free multi-phase buck converter and method thereof comprises a first-stage voltage regulator to convert an input voltage to an intermediate voltage and a second-stage voltage regulator with a phase number not less than two to further convert the intermediate voltage to an output vo ...


4
Jing Meng Liu, Liang Pin Tai, Hung I Wang: Apparatus and method for balancing channel currents in a multi-phase DC-to-DC converter. Richtek Technology, Rosenberg Klein & Lee, July 2, 2002: US06414470 (27 worldwide citation)

An apparatus and method for current balance in a multi-phase DC-to-DC converter with a converter output voltage and a plurality of channel currents employs for each channel a multi-input pulse width modulator or an ordinary pulse width modulator in conjunction with a multi-input comparator to produc ...


5
Hung I Wang, Liang Pin Tai: JFET driver circuit and JFET driving method. Richtek Technology, Rosenberg Klein & Lee, June 19, 2007: US07233191 (22 worldwide citation)

To turn on a JFET, a two-stage turn-on current control is employed in a JFET driver circuit and a JFET driving method, by which a shortly pulsed high sourcing current is provided to turn on the JFET rapidly and efficiently, and a continuous low sourcing current is provided after the JFET turns on fo ...


6
Hung I Wang: Current sense apparatus and method using a combination of a simulation and a real sense for a switching mode power converter. Richtek Technology, Rosenberg Klein & Lee, August 16, 2005: US06930474 (20 worldwide citation)

In a switching mode DC-to-DC power converter including a high-side transistor connected between an input voltage and an output node, a low-side transistor connected between the output node and a reference potential, and an inductor connected to the output node to derive an output voltage and an outp ...


7
Hung I Wang, Jiun Chiang Chen: Temperature compensation device and method for a voltage regulator. Richtek Technology, Rosenberg Klein & Lee, September 25, 2007: US07274174 (11 worldwide citation)

In a voltage regulator including an inductor current flowing through a sense element with a first temperature coefficient, and a current sense circuit for generating a current sense signal related to the first temperature coefficient by sensing the inductor current from the sense element, a temperat ...


8
Kent Huang, Liang Pin Tai, Hung I Wang, Jian Rong Huang, Kuo Ping Liu, Yu Fan Liao: DC-to-DC converter with fast load transient response and method thereof. Richtek Technology, Rosenberg Klein & Lee, June 19, 2007: US07233134 (9 worldwide citation)

A DC-to-DC converter comprises a sense circuit to sense the output voltage of the converter to generate a feedback signal, a transconductive amplifier to amplify a difference between the feedback signal and a threshold signal to generate a first current and to generate a second current in response t ...


9
Liang Pin Tai, Shwu Liang Hsieh, Hung I Wang, Jing Meng Liu: Current sense apparatus and method. Richtek Technology, Rosenberg Klein & Lee, October 5, 2004: US06801030 (9 worldwide citation)

A current sense apparatus and method comprises a common drain DMOSFET and a MOSFET connected in series between a high voltage and a low voltage to serve as an output stage. The DMOSFET produces a phase output current, a mirror current mirrored from the phase output current, and a sense voltage. A se ...


10
Kent Huang, Liang Pin Tai, Hung I Wang, Jian Rong Huang, Kuo Ping Liu, Yu Fan Liao: Delta-sigma DC-to-DC converter and method thereof. Richtek Technology, Rosenberg Klein & Lee, September 20, 2005: US06946823 (6 worldwide citation)

A delta-sigma DC-to-DC converter comprises a pair of high-side and low-side switches switched to convert an input voltage to an output voltage, a sense circuit to sense the output voltage of the converter to generate a feedback signal, a transconductive amplifier to amplify a difference between the ...