CONVERSOR AC-DC EM MODO CONTÍNUO DE CORRENTE COM COMPENSAÇÃO EM FREQUÊNCIA PARA LÂMPADAS LED DE BAIXO CUSTO E ALTA EFICIÊNCIA

Abstract

This paper presents a new architecture of a driver of high brightness LEDs, with low cost and high yield. Employs a CUK type converter in continuous mode with current compensation rate to feed the high-brightness LEDs through the grid, from 85V to 265V, operating at high frequency switched Pulse Width Modulation (MLP) and connected to a series LC resonant filter for load feeding entry in protection against voltage surges. Twenty LEDs High Power OSRAM 720-GWPSL and a circuit with constant current in Offline mode were used. The proposed architecture aims to present a proposal for a lowcost and low current consumption driver. The comparative study between the prototype of this device from the graphs obtained from the results of laboratory measurements.

Keywords

• CUK Converter
• LED Lamp
• Continous Current Mode
• Pulse Width Modulation (PWM)