Overcoming leakage current by output precharging in error amplifiers

Anghel, Viorel; Bartholomeusz, Chris; Pristavu, Gheorghe; Brezeanu, Gheorghe

doi:10.1109/smicnd.2012.6400754

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Cited by 3 publications

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“…This operation is required because otherwise C ctrl would be completely discharged when SW first turns on and a low T off value would be outputted. A very low OFF time can lead to increased controller transient response, or even constant failure [11].…”

Section: Simulation Resultsmentioning

confidence: 99%

Variable off time current-mode floating buck controller - A different approach

Anghel

Bartholomeusz

Pristavu

et al. 2013

2013 Proceedings of the ESSCIRC (ESSCIRC)

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Switch-mode power supplies have become the premier choice for LED backlighting applications. This paper introduces a new current-mode floating buck controller architecture, used for driving constant current through a string of LEDs. Unlike state-of-the-art controllers, this architecture is based on fixed peak current and variable OFF time as the current control method. An innovative time modulator is added to provide a constant feedback loop response regardless of external components. The proposed controller architecture is designed, implemented in a 0.5µm CMOS process and its performances are validated by simulations and measurements.

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Section: Simulation Resultsmentioning

confidence: 99%