Bus capacitance reduction in driver for LEDs power
DOI:
https://doi.org/10.5902/2179460X40623Keywords:
Static Converter, Buck-Boos, LED driver, Bus Capacitance Reduction, Active Ripple ControlAbstract
This paper presents the performance evaluation of control techniques for the reduction of capacitors in drivers for actuation LED.
Through the active control of the driver output current, the ripple from the PFC stage of the current can be controlled, keeping it
at levels appropriate to the technical standards, being IEC 61000-3-2 Class C and IEEE 1789. This control allows the output
voltage ripple to vary at higher amplitude levels, allowing the use of a lower capacitance bus capacitor, therefore longer life useful
and reliability.The analyzed electronic system consists of the Buck-Boost converter was performed at the power control stage
for different bus voltages and output power. Different controller structures were analizes, in order to obtain an analysis of the
influence of these controllers in the reduction of bus capacitance. Thus obtaining a greater ripple in the bus voltage, maintaining
agreement with IEEE 1789 standard regarding current ripple limits on LEDs.
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