High frequency high efficiency high dynamic range (3H) DC-DC converter IC

As demanded by the increasing powerful performance of electronic devices ranging from computer systems, embedded systems, and portable devices, high performance microprocessors are required to handle large scale computing and complicated algorithm. Therefore, it is urgent to develop a voltage regula...

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Main Author: Xue, Yuanzhong
Other Authors: Zheng Yuanjin
Format: Theses and Dissertations
Language:English
Published: 2014
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Online Access:https://hdl.handle.net/10356/61733
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-617332023-07-04T16:21:25Z High frequency high efficiency high dynamic range (3H) DC-DC converter IC Xue, Yuanzhong Zheng Yuanjin School of Electrical and Electronic Engineering Panasonic Industrial Devices Semiconductor Development Asia DRNTU::Engineering::Electrical and electronic engineering::Integrated circuits As demanded by the increasing powerful performance of electronic devices ranging from computer systems, embedded systems, and portable devices, high performance microprocessors are required to handle large scale computing and complicated algorithm. Therefore, it is urgent to develop a voltage regulator with fast load transient response and large current delivery capability to power the next generation microprocessor. The scope of this thesis is to design a dc-dc converter which delivers large current and responses fast to the load transient without increasing the output capacitor for multifarious electronic devices. Hysteretic control method is a promising candidate to cope with the fast load transient response and tight voltage tolerance requirement due to its bandwidth closing to switching frequency. However, it suffers from wide variation of switching frequency which may result in an increasing output voltage ripple. Moreover, the harmonic components of variable switching frequency may close to the frequency of power supply resonant tanks formed by parasitic package inductance interconnects and on-die decoupling capacitances, therefore extra output voltage noise is excited. To address this issue, a fixed frequency hysteretic buck converter is proposed and presented in this thesis. It adopts a Phase Locked Loop to synchronise the switching clock with a reference clock to realize fixed frequency operation. The prototype achieves fixed 1MHz switching frequency and 2.5mV output ripple at 1A load current. In order to enable the fixed frequency hysteretic buck converter adopted to multiphase configuration for large current delivery capability in terms of thermal management and efficiency. Whereas it is difficult to apply multiphase configuration to hysteretic control method owing to its lack of synchronization. A multiphase hysteretic buck converter is proposed and presented in this thesis to explore how to apply the hysteretic control method to multiphase configuration. The proposed topology enables a multiphase configuration by adopting a Delay locked loop to achieve automatic phase synchronization. The Delay locked loop is used to generate multiphase synchronization accurate signals from the output of a hysteretic comparator directly without external synchronization signals. MASTER OF ENGINEERING (EEE) 2014-09-12T01:31:43Z 2014-09-12T01:31:43Z 2014 2014 Thesis Xue, Y. (2014). High frequency high efficiency high dynamic range (3H) DC-DC converter IC. Master’s thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/61733 10.32657/10356/61733 en 101 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering::Integrated circuits
spellingShingle DRNTU::Engineering::Electrical and electronic engineering::Integrated circuits
Xue, Yuanzhong
High frequency high efficiency high dynamic range (3H) DC-DC converter IC
description As demanded by the increasing powerful performance of electronic devices ranging from computer systems, embedded systems, and portable devices, high performance microprocessors are required to handle large scale computing and complicated algorithm. Therefore, it is urgent to develop a voltage regulator with fast load transient response and large current delivery capability to power the next generation microprocessor. The scope of this thesis is to design a dc-dc converter which delivers large current and responses fast to the load transient without increasing the output capacitor for multifarious electronic devices. Hysteretic control method is a promising candidate to cope with the fast load transient response and tight voltage tolerance requirement due to its bandwidth closing to switching frequency. However, it suffers from wide variation of switching frequency which may result in an increasing output voltage ripple. Moreover, the harmonic components of variable switching frequency may close to the frequency of power supply resonant tanks formed by parasitic package inductance interconnects and on-die decoupling capacitances, therefore extra output voltage noise is excited. To address this issue, a fixed frequency hysteretic buck converter is proposed and presented in this thesis. It adopts a Phase Locked Loop to synchronise the switching clock with a reference clock to realize fixed frequency operation. The prototype achieves fixed 1MHz switching frequency and 2.5mV output ripple at 1A load current. In order to enable the fixed frequency hysteretic buck converter adopted to multiphase configuration for large current delivery capability in terms of thermal management and efficiency. Whereas it is difficult to apply multiphase configuration to hysteretic control method owing to its lack of synchronization. A multiphase hysteretic buck converter is proposed and presented in this thesis to explore how to apply the hysteretic control method to multiphase configuration. The proposed topology enables a multiphase configuration by adopting a Delay locked loop to achieve automatic phase synchronization. The Delay locked loop is used to generate multiphase synchronization accurate signals from the output of a hysteretic comparator directly without external synchronization signals.
author2 Zheng Yuanjin
author_facet Zheng Yuanjin
Xue, Yuanzhong
format Theses and Dissertations
author Xue, Yuanzhong
author_sort Xue, Yuanzhong
title High frequency high efficiency high dynamic range (3H) DC-DC converter IC
title_short High frequency high efficiency high dynamic range (3H) DC-DC converter IC
title_full High frequency high efficiency high dynamic range (3H) DC-DC converter IC
title_fullStr High frequency high efficiency high dynamic range (3H) DC-DC converter IC
title_full_unstemmed High frequency high efficiency high dynamic range (3H) DC-DC converter IC
title_sort high frequency high efficiency high dynamic range (3h) dc-dc converter ic
publishDate 2014
url https://hdl.handle.net/10356/61733
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