Accepting a 3.3V to 36V input, the LT3744 synchronous step-down dc/dc converter delivers a constant current to drive high current LEDs. The device uses two external switching MOSFETs, delivering up to 20A (80W) of continuous LED current from a nominal 12V input. In pulsed LED applications, it can deliver up to 40A of LED current or 160W from a 12V input. Delivering efficiencies as high as 95%, it can eliminate the need for external heat sinking. A frequency adjust pin allows programming the frequency between 100 kHz and 1 MHz. Available in a 36-pin, 5 mm x 6 mm QFN package, price starts at $4.55 each/1,000. For more information and a datasheet, visit http://www.linear.com/product/LT3744
Linear Technology Corp.