A High-Accuracy and Robust Low Drop-Out Regulator for Outdoor Decorative Lighting LED Driver

Lu Wei Pan; Li Zhou; Tao Sun; Ying Wei; Yuan Yuan Gao; Peng Chen

doi:10.4028/www.scientific.net/AMM.462-463.609

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 462-463A High-Accuracy and Robust Low Drop-Out Regulator...

A High-Accuracy and Robust Low Drop-Out Regulator for Outdoor Decorative Lighting LED Driver

Abstract:

A high-accuracy and robust LDO was designed based on CSMC 0.5um 40V BCD process, it was integrated in an outdoor decorative lighting LED Control and Driver SOC. The input of SOC was a 12V~40V power which was used by LED lamp. The LDO converted the input power of SOC to a 5V power for the Digital Control and Signal Transmission circuits inside the SOC. Due to the application requirements of SOC, the robustness of LDO in-55°C~150°C temperature and 12V~40V power voltage conditions must be guaranteed. The process variations and application conditions would affect the output voltage of LDO, 3 bits digital trim signal Trim [3: and a trim circuit were utilized to improve the accuracy of LDOs output voltage. Simulation result shows that the LDO works robustly and the output voltage accuracy can be improved to ±0.5% max in all conditions after being trimmed.

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Periodical:

Applied Mechanics and Materials (Volumes 462-463)

Pages:

609-614

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.462-463.609

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Online since:

November 2013

Authors:

Lu Wei Pan, Li Zhou, Tao Sun*, Ying Wei, Yuan Yuan Gao, Peng Chen

Keywords:

BCD Process, Digital Trim Signal, Low Drop-Out Regulator, Process Corner

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* - Corresponding Author

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