EPE Association: EPE 2015 - LS1e: Power Supplies

EPE 2015 - LS1e: Power Supplies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2015 ECCE Europe - Conference > EPE 2015 - Topic 07: Power Supplies > EPE 2015 - LS1e: Power Supplies

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   A Concept of Field Programmable Power Supply Array Utilizing Power Supply on Chip -- Fully digital controlled multiple input and output voltages POL--
By Madoka HIGASHIDA [View]
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Abstract: In this paper, we propose a concept of Field Programmable Power supply Array (FPPA), which is a fully digital controlled power supply, based on power supply on chip technology. The proposed control strategy can regulate multiple output voltages by changing the number of working POLs with simple algorithm for multiple input voltages. It can also realize high efficiency over the wide load range. In addition, it enables boost and back at the same time. In feed forward mode, the proposed concept realized quick response. Moreover, in order to obtain a fast response to a sudden load change, it is necessary to increase the switching frequency.

   A Matrix-Based Small-Signal Modeling Method for Buck Converters and its Feature Analysis
By Xiaolong YUE [View]
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Abstract: The power electronic converters are actually single input multiple output (SIMO) systems in frequency domain. Under a perturbation frequency excitation, the state variables contain not only the perturbation frequency but also its sideband components. However, traditional small-signal modeling methods focus on establishing the relationship at perturbation frequency and ignore the other sideband components. The obtained model, therefore, is simplified in a single input single output (SISO) form, which is unsuitable to analyze the interactions of power converters. In this paper, a matrix-based small-signal modeling method is proposed to describe the SIMO characteristics of power electronic converters. Two key conclusions can be obtained from the proposed model: the low frequency component is always the largest and the frequency characteristics are periodical with half switching frequency. Detailed comparison shows that average model and multi-frequency model are all approximations of the proposed model in some special situation. The simulation and experimental results validate the accuracy and effectiveness of the proposed model.

   A Power Management IC for Distributed Power Supplies in Low to Medium Power Applications
By S M AHSANUZZAMAN [View]
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Abstract: This paper introduces a novel flexible integrated power management IC that enables implementation of various distributed power supply architectures in low to medium power applications, ranging from a fraction of watt to tens of watts. In these applications distributed power supply solutions have not been traditionally used, due to several practical implementation challenges related to speed, protection, and synchronization between modules. The new IC power module eliminates these problems by combining segmented power stages with high-bandwidth mixed-signal current program mode controller and a novel capacitive coupling and coding scheme. Several identical custom designed IC modules are fabricated in 0.13 µm CMOS process, each providing up to 2 W of output power, while operating at up to 10 MHz switching frequencies. The versatility and proper functionality of the modules are verified in several distributed power supply architectures, through simulation and experimental results.

   Off-line Capacitively-Isolated Quasi Resonant LED Driver
By Doron SHMILOVITZ [View]
[Download]

Abstract: A simple, efficient and low cost quasi resonant LED driver is proposed. The proposed driver relies ona capacitive safety isolation barrier, which eliminates the need for a bulky isolation transformer. Thus,cost and footprint area can be reduced. The feasibility of the proposed topology is verified bysimulation and experimental results.

EPE 2015 - LS1e: Power Supplies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2015 ECCE Europe - Conference > EPE 2015 - Topic 07: Power Supplies > EPE 2015 - LS1e: Power Supplies
	[return to parent folder]

	A Concept of Field Programmable Power Supply Array Utilizing Power Supply on Chip -- Fully digital controlled multiple input and output voltages POL-- By Madoka HIGASHIDA	[View] [Download]
Abstract: In this paper, we propose a concept of Field Programmable Power supply Array (FPPA), which is a fully digital controlled power supply, based on power supply on chip technology. The proposed control strategy can regulate multiple output voltages by changing the number of working POLs with simple algorithm for multiple input voltages. It can also realize high efficiency over the wide load range. In addition, it enables boost and back at the same time. In feed forward mode, the proposed concept realized quick response. Moreover, in order to obtain a fast response to a sudden load change, it is necessary to increase the switching frequency.

	A Matrix-Based Small-Signal Modeling Method for Buck Converters and its Feature Analysis By Xiaolong YUE	[View] [Download]
Abstract: The power electronic converters are actually single input multiple output (SIMO) systems in frequency domain. Under a perturbation frequency excitation, the state variables contain not only the perturbation frequency but also its sideband components. However, traditional small-signal modeling methods focus on establishing the relationship at perturbation frequency and ignore the other sideband components. The obtained model, therefore, is simplified in a single input single output (SISO) form, which is unsuitable to analyze the interactions of power converters. In this paper, a matrix-based small-signal modeling method is proposed to describe the SIMO characteristics of power electronic converters. Two key conclusions can be obtained from the proposed model: the low frequency component is always the largest and the frequency characteristics are periodical with half switching frequency. Detailed comparison shows that average model and multi-frequency model are all approximations of the proposed model in some special situation. The simulation and experimental results validate the accuracy and effectiveness of the proposed model.

	A Power Management IC for Distributed Power Supplies in Low to Medium Power Applications By S M AHSANUZZAMAN	[View] [Download]
Abstract: This paper introduces a novel flexible integrated power management IC that enables implementation of various distributed power supply architectures in low to medium power applications, ranging from a fraction of watt to tens of watts. In these applications distributed power supply solutions have not been traditionally used, due to several practical implementation challenges related to speed, protection, and synchronization between modules. The new IC power module eliminates these problems by combining segmented power stages with high-bandwidth mixed-signal current program mode controller and a novel capacitive coupling and coding scheme. Several identical custom designed IC modules are fabricated in 0.13 µm CMOS process, each providing up to 2 W of output power, while operating at up to 10 MHz switching frequencies. The versatility and proper functionality of the modules are verified in several distributed power supply architectures, through simulation and experimental results.

	Off-line Capacitively-Isolated Quasi Resonant LED Driver By Doron SHMILOVITZ	[View] [Download]
Abstract: A simple, efficient and low cost quasi resonant LED driver is proposed. The proposed driver relies ona capacitive safety isolation barrier, which eliminates the need for a bulky isolation transformer. Thus,cost and footprint area can be reduced. The feasibility of the proposed topology is verified bysimulation and experimental results.