A New Large Signal Average Model for Variable Frequency Pulse-Width Modulators

被引：0

作者：

Houston, Jason ^{[1
]}

Qiu, Weihong ^{[2
]}

Cheung, Chun ^{[3
]}

机构：

[1] Intersil Corp, 4020 Stirrup Creek DR, Durham, NC 27703 USA

[2] Intersil Corp, Milpitas, CA 95035 USA

[3] Intersil Corp, Bridgewater, MA 08807 USA

来源：

2013 TWENTY-EIGHTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC 2013) | 2013年

关键词：

TRANSIENT-RESPONSE; BANDWIDTH;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper introduces a large signal average model of a voltage regulator controlled by a variable frequency pulse width modulator (PWM). Variable frequency PWM techniques significantly reduce switching action delays and improve transient response compared to fixed frequency PWMs. The conventional average model cannot accurately predict the modulator behavior during variable frequency operation. In this paper, the effect on the modulator gain of the variable frequency operation is analyzed and incorporated in the average model. Using a variable frequency multiphase buck regulator in CPU core power applications as an example, the new large signal model is derived and demonstrated.

引用

页码：1738 / 1745

页数：8

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