LT3436EFE high-power white LED driver circuit diagram

Published:2011/9/6 4:29:00 Author:Lucas | Keyword: high-power white LED, driver | From:SeekIC

The SEPIC power white LED driver circuit with wide input voltage composed of LT3436EFE is shown as the figure, and in the wide input voltage range (3.6 ~ 7V), it can provide 700mA driver current for the LuxeonV series of white LEDs. Converter's output voltage is 6.8V, which is the LED (Model LXHL-LW6C)'s forward voltage. U1 is the high-efficient, 3A thermally enhanced LT3436EFE on-board power switch, which can simplify the regulator design and layout. It also gives the white LED driver sufficient current without overheating. U2 is the LTl7931S6 op amp with SOT-2 package.



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