The Experts below are selected from a list of 9507 Experts worldwide ranked by ideXlab platform
Tsung-yen Tsai - One of the best experts on this subject based on the ideXlab platform.
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A Dynamic Bootstrap Voltage Technique for a High-Efficiency Buck Converter in a universal serial bus Power Delivery Device
IEEE Transactions on Power Electronics, 2016Co-Authors: Wei-chung Chen, Ke-horng Chen, Ying-wei Chou, Meng-wei Chien, Hsin-chieh Chen, Shang-hsien Yang, Tsung-yen TsaiAbstract:The dynamic bootstrap voltage (DBV) technique is proposed to keep high efficiency over wide ranges of load currents for high-power universal serial bus devices. The silicon area of the embedded power management with the DBV technique in the system-on-a-chip can be effectively reduced to 50% of the conventional design with a P-type high-side power MOSFET. Test chips fabricated in 0.25-μm CMOS process showed a 92% peak efficiency from 1 mA to 1 A. The maximum driving current was higher than 5 A, and the efficiency was 88%. Compared with the efficiency of the converter without the DBV technique, the efficiency of the converter with DBV technique was improved by about 28%.
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Dynamic bootstrap voltage technique for high efficiency buck converter in universal serial bus power device supplying system
2013 IEEE Asian Solid-State Circuits Conference (A-SSCC), 2013Co-Authors: Wei-chung Chen, Ke-horng Chen, Tsung-yen Tsai, Chen-chih HuangAbstract:For high power universal serial bus (USB) devices, the dynamic bootstrap voltage (DBV) technique is proposed to keep high efficiency over a wide load range, including light and heavy loads. Besides, the silicon area of power management of the system-on-a-chip (Soc) can be effectively reduced to 50% of conventional design with P-type high-side power MOSFET. The test chip fabricated in 0.25μm CMOS process shows 92% peak efficiency from 1mA to 1A. The maximum driving current is higher than 3A with 88 % efficiency. Compared to that without the DBV technique, the efficiency is improved about 28%.
Wei-chung Chen - One of the best experts on this subject based on the ideXlab platform.
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A Dynamic Bootstrap Voltage Technique for a High-Efficiency Buck Converter in a universal serial bus Power Delivery Device
IEEE Transactions on Power Electronics, 2016Co-Authors: Wei-chung Chen, Ke-horng Chen, Ying-wei Chou, Meng-wei Chien, Hsin-chieh Chen, Shang-hsien Yang, Tsung-yen TsaiAbstract:The dynamic bootstrap voltage (DBV) technique is proposed to keep high efficiency over wide ranges of load currents for high-power universal serial bus devices. The silicon area of the embedded power management with the DBV technique in the system-on-a-chip can be effectively reduced to 50% of the conventional design with a P-type high-side power MOSFET. Test chips fabricated in 0.25-μm CMOS process showed a 92% peak efficiency from 1 mA to 1 A. The maximum driving current was higher than 5 A, and the efficiency was 88%. Compared with the efficiency of the converter without the DBV technique, the efficiency of the converter with DBV technique was improved by about 28%.
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Dynamic bootstrap voltage technique for high efficiency buck converter in universal serial bus power device supplying system
2013 IEEE Asian Solid-State Circuits Conference (A-SSCC), 2013Co-Authors: Wei-chung Chen, Ke-horng Chen, Tsung-yen Tsai, Chen-chih HuangAbstract:For high power universal serial bus (USB) devices, the dynamic bootstrap voltage (DBV) technique is proposed to keep high efficiency over a wide load range, including light and heavy loads. Besides, the silicon area of power management of the system-on-a-chip (Soc) can be effectively reduced to 50% of conventional design with P-type high-side power MOSFET. The test chip fabricated in 0.25μm CMOS process shows 92% peak efficiency from 1mA to 1A. The maximum driving current is higher than 3A with 88 % efficiency. Compared to that without the DBV technique, the efficiency is improved about 28%.
K. Lynn - One of the best experts on this subject based on the ideXlab platform.
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universal serial bus (USB) power management
Wescon 98. Conference Proceedings (Cat. No.98CH36265), 1998Co-Authors: K. LynnAbstract:Micrel's logic-controlled high-side power switch integrated circuits are ideal for USB power switching applications. Each offers superior protection and performance relative to polyfuses. In addition, proper PCB layout techniques are highly recommended to ensure that both USB voltage regulation and transient regulation specifications are satisfied.
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universal serial bus (USB) power management
WESCON 97 Conference Proceedings, 1997Co-Authors: K. LynnAbstract:Power management and distribution is a major factor in correctly designing USB (universal serial bus) peripherals. Proper methods of designing USB peripheral power distribution are crucial to ensure full compliance with the USB specification, including compliance with EMI and voltage regulation requirements.
Jacek Augustyn - One of the best experts on this subject based on the ideXlab platform.
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FedCSIS - universal serial bus as a Communication Medium for Prototype Networked Data Acquisition and Control Systems - Performance Optimisation and Evaluation
Proceedings of the 2018 Federated Conference on Computer Science and Information Systems, 2018Co-Authors: Andrzej Tutaj, Jacek AugustynAbstract:universal serial bus can be considered a cost-effective and high-throughput communication medium for sensor networks and multinode control or data acquisition systems, especially for prototyping purposes. In a prototype system, a PC or Mac computer with a general-purpose operating system is often selected as a host or root node for the USB bus and it acts as a central data collector, supervisory user interface, and network traffic scheduler. However, achieved communication performance is often unsatisfactory since USB stack drivers incorporated in Windows, Linux, or macOS operating systems are not optimised for such specific purposes. The paper shows how an appropriately selected and implemented user application communication schedule, making use of operating system drivers pipelining and multitasking capabilities, can substantially improve USB network throuahnut and reduce communication latency.
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universal serial bus as a Communication Medium for Prototype Networked Data Acquisition and Control Systems - Performance Optimisation and Evaluation
2018 Federated Conference on Computer Science and Information Systems (FedCSIS), 2018Co-Authors: Andrzej Tutaj, Jacek AugustynAbstract:universal serial bus can be considered a cost-effective and high-throughput communication medium for sensor networks and multinode control or data acquisition systems, especially for prototyping purposes. In a prototype system, a PC or Mac computer with a general-purpose operating system is often selected as a host or root node for the USB bus and it acts as a central data collector, supervisory user interface, and network traffic scheduler. However, achieved communication performance is often unsatisfactory since USB stack drivers incorporated in Windows, Linux, or macOS operating systems are not optimised for such specific purposes. The paper shows how an appropriately selected and implemented user application communication schedule, making use of operating system drivers pipelining and multitasking capabilities, can substantially improve USB network throuahnut and reduce communication latency.
Shamsul Bahari Mohd Noor - One of the best experts on this subject based on the ideXlab platform.
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Improvement of data refresh rate for dual serial port to universal serial bus acquisition system
2009 IEEE International Conference on Virtual Environments Human-Computer Interfaces and Measurements Systems, 2009Co-Authors: Syed Sulaiman Bin Kaja Mohideen, Shamsul Bahari Mohd NoorAbstract:Before the universal serial bus(USB) technologies has become popular, there are a lot of software and hardware computer peripheral development based on traditional external interface like general purpose interface bus ( GPIB- IEEE488), parallel port, serial port and PS/2. Developing these custom software and hardware computer peripheral is less difficult as compared to peripheral that is designed based on USB. The main reason for the difficulty is that the USB is designed to be user friendly but not developer friendly. For that reason, many developers will maintain using the traditional port when designing their custom application. To support traditional interface on newer PC with only USB port, there are devices in the market to convert the old external port to USB. One of the converters is the USB to dual serial converter. In the market, there are products which are readily available. However, it lacks of certain capability such as the ability to access serial port simultaneously which reduce the data refresh rate. The main purpose of this paper is to discuss technique in designing a USB to serial converter with capability of connecting two serial devices which is accessible simultaneously to improve the data refresh rate.
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VECIMS - Improvement of data refresh rate for dual serial port to universal serial bus acquisition system
2009 IEEE International Conference on Virtual Environments Human-Computer Interfaces and Measurements Systems, 2009Co-Authors: Syed Sulaiman Bin Kaja Mohideen, Shamsul Bahari Mohd NoorAbstract:Before the universal serial bus(USB) Technologies has become popular, there are a lot of software and hardware computer peripheral development based on traditional external interface like General Purpose Interface bus ( GPIB- IEEE488), parallel port, serial port and PS/2. Developing these custom software and hardware computer peripheral is less difficult as compared to peripheral that is designed based on USB. The main reason for the difficulty is that the USB is designed to be user friendly but not developer friendly. For that reason, many developers will maintain using the traditional port when designing their custom application. To support traditional interface on newer PC with only USB port, there are devices in the market to convert the old external port to USB. One of the converters is the USB to dual serial converter. In the market, there are products which are readily available. However, it lacks of certain capability such as the ability to access serial port simultaneously which reduce the data refresh rate. The main purpose of this paper is to discuss technique in designing a USB to serial converter with capability of connecting two serial devices which is accessible simultaneously to improve the data refresh rate.
