Digital Predictive Feed-Forward Controller for a DC-DC Converter in Plasma Display Panel

This paper describes a new digital control method to enhance the dynamic performance of a dc-dc converter used in Plasma Display Panels (PDP). A simple digital PID compensator with duty ratio feed-forward control is proposed to minimize the output voltage variation for continuously changing load current. The duty ratio feed-forward is calculated using a noise-free load current information, which is predicted by the available video data of the PDP. No separate current sensing circuit is required. A small signal z-domain feed-forward model is derived for the performance analysis and controller design. The proposed control method is experimentally verified on an Asymmetrical Half Bridge (AHB) dc-dc converter, which supplies power to a 42 inch PDP.

[1]  A.V. Peterchev,et al.  Load-Line Regulation With Estimated Load-Current Feedforward: Application to Microprocessor Voltage Regulators , 2006, IEEE Transactions on Power Electronics.

[2]  D. Maksimovic,et al.  A digital current mode control technique for DC-DC converters , 2005, Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005..

[3]  Stéphane Bibian,et al.  High performance predictive dead-beat digital controller for DC power supplies , 2002 .

[4]  T. Suntio,et al.  Dynamical Characterization of Peak-Current-Mode-Controlled Buck Converter With Output-Current Feedforward , 2007, IEEE Transactions on Power Electronics.

[5]  Seungwon Choi,et al.  Small-signal analysis and control design of asymmetrical half-bridge DC-DC converters , 2006, IEEE Transactions on Industrial Electronics.

[6]  Jian Sun,et al.  Interpretation and Prediction of Loop Gain Characteristics For Switching Power Converters Loaded with General Load Subsystem , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[7]  S. Chattopadhyay,et al.  A Digital Current-Mode Control Technique for DC–DC Converters , 2006, IEEE Transactions on Power Electronics.

[8]  Sang-Kyoo Han,et al.  A resonant energy-recovery circuit for plasma display panel employing gas-discharge current compensation method , 2005 .

[9]  M. Kasahara,et al.  14.2: New Drive System for PDPs with Improved Image Quality: Plasma Al , 1999 .

[10]  Nathan O. Sokal,et al.  Near-Optimum Dynamic Regulation of DC-DC Converters Using Feed-Forward of Output Current and Input Voltage with Current-Mode Control , 1986, IEEE Transactions on Power Electronics.

[11]  Bo-Hyung Cho,et al.  New Energy Recovery Concept for AC PDP Sustaining Driver Using Current Injection Method(CIM) , 2002 .

[12]  B. Mercier,et al.  A new video storage architecture for plasma display panels , 1995 .

[13]  D. Maksimovic,et al.  Digital current-mode controller for DC-DC converters , 2005, Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005..

[14]  Jan A. Melkebeek,et al.  Duty-ratio feedforward for digitally controlled boost PFC converters , 2003, Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03..

[15]  D. Packard.  Discrete modeling and analysis of switching regulators , 1976 .

[16]  R. B. Ridley,et al.  A new, continuous-time model for current-mode control (power convertors) , 1991 .

[17]  Aleksandar Prodic,et al.  Predictive digital current programmed control , 2003 .

[18]  Sang-Kyoo Han,et al.  High-Performance and Low-Cost Single-Switch Current-Fed Energy Recovery Circuit for ac Plasma Display Panel , 2007, IEEE Transactions on Power Electronics.

[19]  T. Shinoda,et al.  Plasma display technologies for large area screen and cost reduction , 2006, IEEE Transactions on Plasma Science.

[20]  P. Mattavelli.  Digital control of DC-DC boost converters with inductor current estimation , 2004, Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04..

[21]  V. Meleshin,et al.  Small-signal modeling of soft-switched asymmetrical half-bridge DC/DC converter , 1995, Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95.

[22]  Aleksandar Prodic,et al.  Design and implementation of a digital PWM controller for a high-frequency switching DC-DC power converter , 2001, IECON'01. 27th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.37243).

[23]  A. Sobel.  Plasma displays , 1991 .

[24]  Terukazu Sato,et al.  Analysis and optimum design of a buck-type DC-to-DC converter employing load current feedforward , 1998, PESC 98 Record. 29th Annual IEEE Power Electronics Specialists Conference (Cat. No.98CH36196).

[25]  Sang-Kyoo Han,et al.  High Performance and Low Cost Single Switch Current-fed Energy Recovery Circuits for AC Plasma Display Panels , 2006 .

[26]  B. Johansson.  Analysis of DC-DC converters with current-mode control and resistive load when using load current measurements for control , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[27]  R. Redl,et al.  Optimizing the load transient response of the buck converter , 1998, APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition.