LT3599EUH#PBF

LINEAR TECHNOLOGY  LT3599EUH#PBF  发光二极管驱动器, 4输出, 升压逐步上升, 3.1V-30V输入, 2.06MHz开关, 44V/120mA输出, QFN-32

The is a fixed frequency step-up DC/DC Converter designed to drive four strings of 120mA LEDs up to a 44V output voltage. The switching frequency is programmable from 200kHz to 2.1MHz through an external resistor. LED dimming can be achieved with analogue dimming on the CTRL pin and with pulse width modulation dimming on the PWM pin. The LT3599 accurately regulates LED current even when the input voltage is higher than the LED output voltage. Additional features include programmable LED current derating, switching frequency synchronization to an external clock, LED string disable control, OPENLED\ alert pin, SHORTLED\ alert pins and programmable maximum output voltage when all LED strings are disconnected.

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±1.5% Accurate LED current matching

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Regulates LED current even when VIN > VOUT

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Disconnects LEDs in shutdown

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Programmable open LED protection regulated

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Open/short LED protection and fault flags

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Programmable LED current derating

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Synchronizable to an external clock

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Analogue dimming up to 20:1

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Programmable input UVLO with hysteresis