IC-Hersteller Analog Devices

IC-Hersteller (95)

Analog Devices LT3746

32-Channel 20mA LED Driver with Buck Controller

Details

TopologieAbwärtswandler
Eingangsspannung10-30 V
Schaltfrequenz200-1000 kHz
Ausgang 14 V
IC-RevisionA

Beschreibung

The LT®3746 integrates a 32-channel LED driver with a 55V buck controller. The LED driver lights up to 30mA/13V of LEDs in series per channel, and the buck controller generates an adaptive bus voltage supplying the parallel LED strings. Each channel has individual 6-bit dot correction current adjustment and 12-bit grayscale PWM dimming. Both dot correction and grayscale are accessible via a serial data interface in TTL/CMOS logic.The LT3746 performs full diagnostic and protection against open/short LED and overtemperature fault. The fault status is sent back through the serial data interface. The 30MHz fully-buffered, skew-balanced, cascadableserial data interface makes the chip extremely suitable for large screen LCD dynamic backlighting and mono-, multi-, full-color LED displays.

Eigenschaften

  • 6V to 55V Power Input Voltage Range
  • 32 Independent LED Outputs up to 30mA/13V
  • 6-Bit Dot Correction Current Adjustment
  • 12-Bit Grayscale PWM Dimming
  • 0.5µs Minimum LED On Time
  • Adaptive LED Bus Voltage for High Efficiency
  • Cascadable 30MHz Serial Data Interface
  • Full Diagnostic and Protection: Individual Open/Short LED and Overtemperature Fault.

Typische Anwendungen

  • Large Screen Display LED Backlighting
  • LED Billboards and Signboards
  • Mono-, Multi-, Full-Color LED Displays

Weiterführende Informationen

Artikeldaten