A Digitally Controlled Dual Output Stage Buck Converter with Transient Suppression

To support the increasingly demanding requirements for power conversion units, a digitally controlled dual output stage buck converter is designed. The system consists of a dual output stage, which includes an auxiliary buck output stage connected in parallel with a main output stage. The auxiliar...

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Bibliographic Details
Main Author: Ng, Kendy Chun-Wa
Other Authors: Ng, Wai Tung
Language:en_ca
Published: 2009
Subjects:
Online Access:http://hdl.handle.net/1807/18935
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spelling ndltd-LACETR-oai-collectionscanada.gc.ca-OTU.1807-189352013-04-20T05:21:22ZA Digitally Controlled Dual Output Stage Buck Converter with Transient SuppressionNg, Kendy Chun-WaDC-DC ConvertersTransient ResponseDigital Control0544To support the increasingly demanding requirements for power conversion units, a digitally controlled dual output stage buck converter is designed. The system consists of a dual output stage, which includes an auxiliary buck output stage connected in parallel with a main output stage. The auxiliary output stage is only active during load transient to suppress the output voltage variation. A digital controller is designed to control both stages with a linear/nonlinear control scheme. Nonlinear control is applied during load transient based on the capacitor charge balance principle; whereas linear PID control governs the steady state operation. The design is verified with simulation and experimentally with discrete components. The controller is realized with a FPGA with preset output stage parameters. The experimental result shows a 60% reduction of output voltage variation for a heavy-to-light load transient.Ng, Wai Tung2009-112010-02-15T22:14:50ZNO_RESTRICTION2010-02-15T22:14:50Z2010-02-15T22:14:50ZThesishttp://hdl.handle.net/1807/18935en_ca
collection NDLTD
language en_ca
sources NDLTD
topic DC-DC Converters
Transient Response
Digital Control
0544
spellingShingle DC-DC Converters
Transient Response
Digital Control
0544
Ng, Kendy Chun-Wa
A Digitally Controlled Dual Output Stage Buck Converter with Transient Suppression
description To support the increasingly demanding requirements for power conversion units, a digitally controlled dual output stage buck converter is designed. The system consists of a dual output stage, which includes an auxiliary buck output stage connected in parallel with a main output stage. The auxiliary output stage is only active during load transient to suppress the output voltage variation. A digital controller is designed to control both stages with a linear/nonlinear control scheme. Nonlinear control is applied during load transient based on the capacitor charge balance principle; whereas linear PID control governs the steady state operation. The design is verified with simulation and experimentally with discrete components. The controller is realized with a FPGA with preset output stage parameters. The experimental result shows a 60% reduction of output voltage variation for a heavy-to-light load transient.
author2 Ng, Wai Tung
author_facet Ng, Wai Tung
Ng, Kendy Chun-Wa
author Ng, Kendy Chun-Wa
author_sort Ng, Kendy Chun-Wa
title A Digitally Controlled Dual Output Stage Buck Converter with Transient Suppression
title_short A Digitally Controlled Dual Output Stage Buck Converter with Transient Suppression
title_full A Digitally Controlled Dual Output Stage Buck Converter with Transient Suppression
title_fullStr A Digitally Controlled Dual Output Stage Buck Converter with Transient Suppression
title_full_unstemmed A Digitally Controlled Dual Output Stage Buck Converter with Transient Suppression
title_sort digitally controlled dual output stage buck converter with transient suppression
publishDate 2009
url http://hdl.handle.net/1807/18935
work_keys_str_mv AT ngkendychunwa adigitallycontrolleddualoutputstagebuckconverterwithtransientsuppression
AT ngkendychunwa digitallycontrolleddualoutputstagebuckconverterwithtransientsuppression
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