LT3592EDDB#TRMPBF

LINEAR TECHNOLOGY  LT3592EDDB#TRMPBF  发光二极管驱动器, 1输出, 降压逐步下降, 3.6V-36V输入, 2.2MHz开关, 30V/500mA输出, DFN-10

The is a fixed frequency step-down DC/DC Converter 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 night-time brake lights. The high switching frequency offers several advantages by permitting the use of a small inductor and small ceramic capacitors. The constant switching frequency combined with low-impedance ceramic capacitors result in low, predictable output ripple. A wide input voltage range of 3.6 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.

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Shorted and open LED protected

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Internal switch current sense resistor

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External resistor programs LED current, pin selects 10:1 ratio

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Catch diode current sense to prevent runaway at high VIN