Browsing by Author "Tso, CH"

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An integrated digital PWM DC/DC converter
(2000)
Tso, CH
;
Wu, JC
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
In this paper, a simple, integrated, and digitally controlled PWM DC/DC converter is proposed. All circuits can be implemented on a single chip. Behavior modeling and techniques for increasing resolution for this digital controller are also discussed. Despite of its simple architecture, simulation results show competitive performance among general PWM converters.
Analysis and implementation of proportional current feedback technique for digital PWM DC-DC converters
(2003-11-01)
Tso, CH
;
Wu, JC
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
In this paper, a novel technique using proportional current feedback is proposed to improve dynamic response of digital PWM DC-DC converters. Generally, digital controllers are implemented using microprocessors or DSPs. Additional A/D converters are required to sense feedback signals. Proposed simple structure makes it feasible to integrate both A/D converter and digital controller on a single chip. System complexity and hardware cost are therefore greatly reduced. A behavioral time domain circuit model is proposed and analyzed using MATLAB. Both simulation and experimental results showed satisfactory performance to meet power requirements of microprocessors.
Design of a sensorless commutation IC for BLDC motors
(2002)
Cheng, KY
;
Lin, YT
;
Tso, CH
;
Tzou, YY
;
電控工程研究所
This paper presents the design methodology to implement a sensorless commutation IC for brushless dc (BLDC) motors by using mixed-mode IC design technology. The developed IC can generate optimal commutation signals for BLDC motors without Hall-effect sensors and can be easily interfaced with a microcontroller or a digital signal processor (DSP) to complete the closed-loop control system. Furthermore, this IC solution requires less analog compensation circuits than other commercial motor control ICs, therefore, high maintainability and accurate control can be achieved. The proposed sensorless commutation IC is integrated in a standard digital single-poly, and four metal 0.35-mum CMOS process.