High-speed intelligent power converter IC

Switched-mode DC-DC converter (power converter) is an important electronic circuit to perform the voltage conversion in electronic devices. Switched-mode DC-DC converter architectures generally have a feedback loop for output regulation. An important part of the loop is the output inductor of the...

Full description

Saved in:
Bibliographic Details
Main Author: Putra, Nicholas Kenneth Naga
Other Authors: Gwee Bah Hwee
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2022
Subjects:
Online Access:https://hdl.handle.net/10356/157990
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-157990
record_format dspace
spelling sg-ntu-dr.10356-1579902023-07-07T19:13:47Z High-speed intelligent power converter IC Putra, Nicholas Kenneth Naga Gwee Bah Hwee School of Electrical and Electronic Engineering Centre for Integrated Circuits and Systems Victor Adrian ebhgwee@ntu.edu.sg, vadrian@ntu.edu.sg Engineering::Electrical and electronic engineering::Integrated circuits Engineering::Electrical and electronic engineering::Power electronics Engineering::Electrical and electronic engineering::Electronic circuits Switched-mode DC-DC converter (power converter) is an important electronic circuit to perform the voltage conversion in electronic devices. Switched-mode DC-DC converter architectures generally have a feedback loop for output regulation. An important part of the loop is the output inductor of the converter as its value may determine the loop stability. The value of the inductor, however, has to be chosen conservatively as it generally determines the size of the converter. Fully-integrated converters, where the inductor is integrated either on the IC or within the IC package, are increasingly popular for miniature and portable applications. To shrink the inductor size, the converter typically operates at high switching-frequencies (> 50 MHz). Another important building block in the loop is the controller to sense output voltage variations and perform the necessary compensation. In high-speed converters, the controller and inductor design become challenging due to trade-offs in size, stability, and complexity (in part for which determine the power dissipation). For advanced converters, the controller operates digitally to perform desirable features, including complex compensation computation and possibly, intelligent compensation such as inductance value tuning/correction. This report presents a high-speed digitally-controlled switched-mode DC-DC buck (step-down) converter design. The converter is designed to operate at a switching-frequency of 100 MHz, and with a 20 nH inductor and a 37.5 nF capacitor. The inductor is designed based on the square planar spiral coil geometry and to be implemented off-chip. The proposed digital controller architecture comprises of an analog-to-digital converter (ADC), a digital compensator, and a digital pulse-width modulator (DPWM), operating at the same switching-frequency. For a high-speed digital controller design, reduced bits of operation are crucial. Higher switching activity occurs when utilizing more bits which is more error-prone. In the design, a 4-bit ADC and a 5-bit DPWM are achieved. An optimized design of the digital compensator is demonstrated. This optimization reduces the complexity of the conventional digital compensator with a decreased number of adders by 4 and multipliers by 5. Power dissipation of the optimized digital compensator is reduced by 82% compared to the conventional counterpart. Additionally, the proposed design achieves 88% power efficiency, 1.2 µs transient response, and 1% output voltage ripple. Multi-phase interleaving topology of the converter is presented with up to 92% output voltage ripple reduction and cancellation in output current ripple. Bachelor of Engineering (Electrical and Electronic Engineering) 2022-05-26T12:29:44Z 2022-05-26T12:29:44Z 2022 Final Year Project (FYP) Putra, N. K. N. (2022). High-speed intelligent power converter IC. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/157990 https://hdl.handle.net/10356/157990 en A2064-211 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering::Integrated circuits
Engineering::Electrical and electronic engineering::Power electronics
Engineering::Electrical and electronic engineering::Electronic circuits
spellingShingle Engineering::Electrical and electronic engineering::Integrated circuits
Engineering::Electrical and electronic engineering::Power electronics
Engineering::Electrical and electronic engineering::Electronic circuits
Putra, Nicholas Kenneth Naga
High-speed intelligent power converter IC
description Switched-mode DC-DC converter (power converter) is an important electronic circuit to perform the voltage conversion in electronic devices. Switched-mode DC-DC converter architectures generally have a feedback loop for output regulation. An important part of the loop is the output inductor of the converter as its value may determine the loop stability. The value of the inductor, however, has to be chosen conservatively as it generally determines the size of the converter. Fully-integrated converters, where the inductor is integrated either on the IC or within the IC package, are increasingly popular for miniature and portable applications. To shrink the inductor size, the converter typically operates at high switching-frequencies (> 50 MHz). Another important building block in the loop is the controller to sense output voltage variations and perform the necessary compensation. In high-speed converters, the controller and inductor design become challenging due to trade-offs in size, stability, and complexity (in part for which determine the power dissipation). For advanced converters, the controller operates digitally to perform desirable features, including complex compensation computation and possibly, intelligent compensation such as inductance value tuning/correction. This report presents a high-speed digitally-controlled switched-mode DC-DC buck (step-down) converter design. The converter is designed to operate at a switching-frequency of 100 MHz, and with a 20 nH inductor and a 37.5 nF capacitor. The inductor is designed based on the square planar spiral coil geometry and to be implemented off-chip. The proposed digital controller architecture comprises of an analog-to-digital converter (ADC), a digital compensator, and a digital pulse-width modulator (DPWM), operating at the same switching-frequency. For a high-speed digital controller design, reduced bits of operation are crucial. Higher switching activity occurs when utilizing more bits which is more error-prone. In the design, a 4-bit ADC and a 5-bit DPWM are achieved. An optimized design of the digital compensator is demonstrated. This optimization reduces the complexity of the conventional digital compensator with a decreased number of adders by 4 and multipliers by 5. Power dissipation of the optimized digital compensator is reduced by 82% compared to the conventional counterpart. Additionally, the proposed design achieves 88% power efficiency, 1.2 µs transient response, and 1% output voltage ripple. Multi-phase interleaving topology of the converter is presented with up to 92% output voltage ripple reduction and cancellation in output current ripple.
author2 Gwee Bah Hwee
author_facet Gwee Bah Hwee
Putra, Nicholas Kenneth Naga
format Final Year Project
author Putra, Nicholas Kenneth Naga
author_sort Putra, Nicholas Kenneth Naga
title High-speed intelligent power converter IC
title_short High-speed intelligent power converter IC
title_full High-speed intelligent power converter IC
title_fullStr High-speed intelligent power converter IC
title_full_unstemmed High-speed intelligent power converter IC
title_sort high-speed intelligent power converter ic
publisher Nanyang Technological University
publishDate 2022
url https://hdl.handle.net/10356/157990
_version_ 1772826684995665920