LT3599 - 4-Channel 120mA LED Driver with ±1.5% Current Matching Data Sheet Linear Technology Co

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Specifications	LT3599 - 4-Channel 120mA LED Driver with ±1.5% Current Matching Data Sheet Linear Technology Corporation
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LT3599 1 3599fa TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION 4-Channel 120mA LED Driver with ±1.5% Current Matc

Specifications	LT3599 - 4-Channel 120mA LED Driver with ±1.5% Current Matching Data Sheet Linear Technology Corporation
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Content	LT3599 1 3599fa TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION 4-Channel 120mA LED Driver with ±1.5% Current Matching The LT®3599 is a ﬁ xed frequency 2A 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 analog 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 ex- ternal clock, LED string disable control, OPENLED alert pin, SHORTLED alert pins and programmable maximum output voltage when all LED strings are disconnected. The LT3599 is available in the thermally enhanced 32-pin (5mm × 5mm) QFN and 28-pin TSSOP packages. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 7199560. 90% Efﬁ cient 12W LED Driver n True Color PWMTM Dimming Ratio Up to 3000:1 n Drives Four Strings of LEDs at Up to 120mA n ±1.5% Accurate LED Current Matching n Wide Input Voltage Range: 3.1V to 30V n Output Voltage Up to 44V n Regulates LED Current Even When VIN > VOUT n Disconnects LEDs in Shutdown n Programmable Maximum VOUT (Regulated) n Open/Short LED Protection and Fault Flags n Programmable LED Current Derating n Adjustable Frequency: 200kHz to 2.1MHz n Synchronizable to an External Clock n Analog Dimming Up to 20:1 n Programmable Input UVLO with Hysteresis n Thermally Enhanced 32-Pin (5mm × 5mm) QFN and 28-Pin TSSOP Packages n Automotive Navigation TFT LCD Displays n Desktop and Notebook TFT LCD Displays LED Current Matching 2k 3.3µF 47nF 10µH 4.7µF 2 100pF 10nF 3599 TA01a LT3599 VO_SW FBOPENLED SHORTLED PWM SHDN/UVLO RT SYNC PWM 80mA PER STRING CTRL VREF TSETLED1 LED2 LED3 LED4 VOUTSWVIN VCSSGNDISET 1M 220pF 31.6k PVIN8V TO 24V VIN VIN 16.5k 53.6k 100k DISABLE4 100k 31.6k 33.2k 52.3k 80.6k 200k 1µF VIN3.1V TO 5.5V TEMPERATURE (°C) –50–1.5 MATCHING (%) –1.0 0 0.5 1.0 1.5 05075 –0.5 –2525100125 3599 TA01b ALL FOUR LED STRINGS
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Following Datasheets	360_1 (6 pages) 361-1 (3 pages) 3612_4LEDs_120Vac_13V350mA-1 (13 pages) 362-1 (4 pages) 362207 (1 pages) 362226 (1 pages) 362804 (1 pages) 3636_pdf_1 (1 pages) 3636_pdf_2 (1 pages) 364-1 (2 pages)
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LT3599 - 4-Channel 120mA LED Driver with ±1.5% Current Matching Data Sheet Linear Technology Corporation

LT3599 - 4-Channel 120mA LED Driver with ±1.5% Current Matching Data Sheet Linear Technology Corporation