资 源 简 介
The LT®3592 is a fi xed frequency step-down DC/DC con-verter designed to operate as a constant-current source. An external sense resistor monitors the output current allowing accurate current regulaTIon, ideal for driving high current LEDs. The output current can be dimmed by a factor of 10 using an external signal for nightTIme brake lights.The high switching frequency offers several advantages by permitTIng the use of a small inductor and small ceramic capacitors. Small components combined with the LT3592’s 10-pin DFN leadless surface mount package save space and cost versus alternaTIve solutions. The constant switching frequency combined with low-impedance ceramic capaci-tors result in low, predictable output ripple.A wide input voltage range of 3.6V to 36V makes the LT3592 useful in a variety of applications. Current mode PWM architecture provides fast transient response and cycle-by-cycle current limiting. Thermal shutdown provides additional protection.
