The LT3599 features a quad-channel 120mA LED driver with ±1.5% current-matching accuracy
peculiarity
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Up3000:1targetTrue Color PWMTMDimming ratio
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With Gundam120mAcurrent drive4skewerLED
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Accuracy±1.5%targetLEDCurrent matching
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Wide input voltage range:3.1Vreach30V
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Output voltage up to44V
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Even in VIN > VOUTIt can also be adjusted under the conditions ofLEDcurrent
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Disconnect in downtime modeLED
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Programmable maximumVOUT (Adjusted)
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Open/short circuitLEDProtection and fault flags
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ProgrammableLEDCurrent derating
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Adjustable Frequency:200kHzreach2.1MHz
- Synchronization to an external clock
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Analog dimming Gundam20:1
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Programmable input with hysteresisUVLO
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Enhanced heat resistance32pins(5mm x 5mm) QFNand28pinsTSSOPencapsulation
description
®The LT 3599 is a fixed-frequency, 2A step-up DC/DC converter designed to drive four strings of 120mA LEDs at an output voltage of up to 44V. The switching frequency can be set in the range of 200kHz to 2.1MHz using an external resistor.
LED dimming is enabled by analog dimming circuitry on the CTRL pin and pulse-width modulation dimming circuitry on the PWM pin. The LT3599 accurately regulates LED current, even when the input voltage is higher than the LED output voltage.
Other features include programmable LED current derating, switching frequency synchronization to an external clock, LED string deactivation control, OPENLED alarm pins, SHORTLED alarm pins, and a programmable maximum output voltage when all LED strings are disconnected. The LT3599 is available in thermally enhanced 32-pin (5mm x 5mm) QFN and 28-pin TSSOP packages
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