Patent · US Active

Frequency compensation based on dual signal paths for voltage-mode switching regulators

US8217637B2 · kind B2 · utility

10Cited by

33References

15Claims

0Family size

Assignee

The Hong Kong University of Science and Technology

Inventors

Yip Sum Tsui · Tsuen Wan, CN
Ying Wu · Grass Valley, US
Kwok Tai Philip Mok · Hong Kong, CN

Key dates

Filing date	Dec 30, 2008
Grant date	Jul 10, 2012
Priority date	—
Expiry date	Sep 30, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B70/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A frequency compensation method for voltage-mode switching regulators is disclosed. A lowpass filter and a bandpass filter are employed in the two signal paths into the dual inputs of PWM comparators. In one embodiment, two zeros are generated to compensate for the L-C output filter poles. Stable operation, low output voltage ripple and fast load transient response are achieved; while the power consumption of error amplifier and the area for implementing on-chip passive components are greatly reduced.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.