LT3519EMS#PBF

LINEAR TECHNOLOGY  LT3519EMS#PBF  发光二极管驱动器, 1输出, 升压, 降压, 降压-升压, 3V-30V输入, 400kHz开关, 45V/750mA输出, MSOP-16

The is a fixed frequency step-up DC/DC Converter designed to drive LEDs. It features an internal 45V, 750mA low-side switch and Schottky diode. Combining a traditional voltage feedback and unique rail-to-rail current sense feedback allows this converter to operate as a constant-voltage source or constant-current source. Internal compensation simplifies applications. This device features rail-to-rail LED current sense pins that provide the most flexibility in choosing a converter configuration to drive the LEDs. The LED current is externally programmable with a sense resistor. The external PWM provides up to 3000:1 PWM dimming and the CTRL input provides analogue dimming.

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Constant-current and constant-voltage regulation

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Open LED protection and open LED status pin

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Programmable under-voltage lockout with hysteresis

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Internal compensation

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CTRL pin provides analogue dimming

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Internal Schottky diode

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<1µA Low shutdown current