IC-Hersteller Analog Devices

IC-Hersteller (103)

Analog Devices LT3599

4-Channel 120mA LED Driver with ±1.5% Current Matching

Details

TopologieAufwärtswandler
Eingangsspannung3.1-30 V
Schaltfrequenz200-2100 kHz
Ausgang 144 V
IC-RevisionE

Beschreibung

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 external clock, LED string disable control, OPENLED alert pin, SHORTLED alert pins and programmable maximumoutput 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.

Eigenschaften

  • True Color PWMTM Dimming Ratio Up to 3000:1
  • Drives Four Strings of LEDs at Up to 120mA
  • ±1.5% Accurate LED Current Matching
  • Wide Input Voltage Range: 3.1V to 30V
  • Output Voltage Up to 44V
  • Regulates LED Current Even When VIN > VOUT
  • Disconnects LEDs in Shutdown
  • Programmable Maximum VOUT (Regulated)
  • Open/Short LED Protection and Fault Flags
  • Programmable LED Current Derating
  • Adjustable Frequency: 200kHz to 2.1MHz
  • Synchronizable to an External Clock
  • Analog Dimming Up to 20:1
  • Programmable Input UVLO with Hysteresis
  • Thermally Enhanced 32-Pin (5mm × 5mm) QFN and 28-Pin TSSOP Packages

Remarks

  • For Inductor Values Refer Page no-10

Typische Anwendungen

  • Desktop and Notebook TFT LCD Displays
  • Automotive Navigation TFT LCD Displays

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Downloads Status Produktserie Muster
744065100
Aktiv i| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.WE-TPC SMT-Speicherdrossel
74454068
Aktiv i| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.WE-PD3 SMT-Speicherdrossel
74454010
Aktiv i| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.WE-PD3 SMT-Speicherdrossel
Artikel Nr. Daten­blatt
744065100
74454068
74454010
Muster
Artikel Nr. Daten­blatt Downloads Status Produktserie Muster