A design for an RGB LED driver with independent PWM control and fast settling time
Name
213386337-MIT.pdf
Description
Full printable version
Size
6.61 MB
Format
Adobe PDF
Checksum (MD5)
09a155ca38656bf3fe6c180f440a2e46
Author(s)
Ashiabor, Awo Dede O
Advisor(s)
John Tilly.
Date Issued
2007
Publisher
Massachusetts Institute of Technology
Abstract
A small sized and efficient method to power RGB LEDs for use as backlights in flat panel displays is explored in this thesis. The proposed method is to drive a parallel switched connection of LEDs with a single Average Mode Controlled buck regulator.Specifications for the switching regulator and control circuitry are described. The application circuit demonstrates current settling times between 7[mu]s and 30[mu]s at a switching frequency of 290kHz. Current settling is improved at higher switching frequencies, with settling times approaching a 2[mu]s to 4[mu]s range at 1MHz switching.
Description
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007.
Includes bibliographical references (leaves 76-77).
Subjects
Electrical Engineering and Computer Science.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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reproduction or distribution in any format is prohibited without written
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