A programmable digital pulse width modulator providing versatile pulse patterns and supporting switching frequencies beyond 15 MHz

This paper describes the implementation of a novel and highly versatile digital pulse width modulator (DPWM) -probably the most critical component in any digitally controlled switching power converter. Its new architecture, composed of a delay-locked loop (DLL) and programmable DPWM module, allows the generation of high resolution, high switching frequency (f/sub m/) PWM signals. The DPWM IC was designed using a standard 0.35-/spl mu/m CMOS process and supports switching frequencies beyond 15 MHz.

[1]  A.P. Chandrakasan,et al.  Ultra low power control circuits for PWM converters , 1997, PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972.

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

[3]  B. Razavi.  LowJitter ProcessIndependent DLL and PLL Based on SelfBiased Techniques , 2003 .

[4]  Aleksandar Prodic,et al.  High-frequency digital controller IC for DC/DC converters , 2002, APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335).

[5]  Gu-Yeon Wei,et al.  A low power switching power supply for self-clocked systems , 1996, ISLPED '96.

[6]  Mark Horowitz,et al.  A low power switching power supply for self-clocked systems , 1996, Proceedings of 1996 International Symposium on Low Power Electronics and Design.

[7]  Anantha Chandrakasan,et al.  High-efficiency multiple-output DC-DC conversion for low-voltage systems , 2000, IEEE Trans. Very Large Scale Integr. Syst..

[8]  Seth R. Sanders,et al.  Architecture and IC implementation of a digital VRM controller , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[9]  Aleksandar Prodic,et al.  High-frequency digital PWM controller IC for DC-DC converters , 2003 .

[10]  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).

[11]  D. Maksimovic,et al.  Digital controller chip set for isolated DC power supplies , 2003, Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03..

[12]  Seth R. Sanders,et al.  Quantization resolution and limit cycling in digitally controlled PWM converters , 2003 .

[13]  J.G. Maneatis,et al.  Low-jitter and process independent DLL and PLL based on self biased techniques , 1996, 1996 IEEE International Solid-State Circuits Conference. Digest of TEchnical Papers, ISSCC.