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15–58VIN to 33.3V 3A LED Automotive Headlight Driver with Up to 98.5% Efficiency

Airplanes and big trucks with 24V batteries need powerful, efficient and robust headlights and spotlights. This circuit shows a 33.3V, 3A (nine Luminus SSR-90 LEDs) buck-boost LED driver that runs from 15V to 58V input with up to 98.5% efficiency. The 4-switch synchronous topology drives high power LEDs with minimal switch power loss (and minimal temperature rise).


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