Low ripple interleaved converter for fast PWM dimming of power LEDs

This work proposes a new interleaved converter to supply Power LEDs. As an interleaved scheme, the converter provides a very low output current ripple, which makes it suitable for this application. The low inductor values used in the device allow the ability of attaining PWM dimming of the Power LEDs at high frequencies (20 kHz and higher). The main operation concept is explained, and a full design process is shown. An experimental setup, for a full diming range assembly of 10 Power LEDs has been built and tested, and experimental results are shown and discussed. Conclusions and limitations of the proposed converter are also commented.