Linear Technology LT3743 synchronous step-down dc-dc converter delivers constant current to drive high current LEDs. Device has a 5.5V to 36V input voltage range and provides up to 20A of continuous LED current from a nominal 12V input, delivering in excess of 80 Watts. In pulsed LED applications, it can deliver up to 40A of LED current or 160 Watts from a 12V input. Efficiencies as high as 95% eliminate any need for external heat sinking and significantly simplify the thermal design.
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