By Topic

A current mode adaptive on-time control scheme for fast transient DC-DC converters

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Hung-Chih Lin ; Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu ; Bou-Ching Fung ; Tsin-Yuan Chang

For controlling DC-DC converters, variable switching frequency controllers have the advantage of fast transient response since the switching cycles can instantaneously change during the transient condition. However, these control techniques generally suffer significant steady-state switching frequency variation when the input voltage and output voltage are varied. Such drawback complicates the design of input and output filters. Therefore, this paper presents a current mode adaptive on-time control scheme. The proposed controller can dynamically adjust the turn-on time of power switches according to the changes of input voltage and output voltage in steady-state operation and can change switching cycles instantaneously in transient operation. Through the proposed control scheme, the DC-DC converters can accomplish fast transient response with the capability of mitigating the switching frequency variation. Full chip simulation results are provided to verify the proposed method. Comparisons with other control techniques are also presented.

Published in:

Circuits and Systems, 2008. ISCAS 2008. IEEE International Symposium on

Date of Conference:

18-21 May 2008