DESCRIPTION
TheLT®3745 integratesa16-channelLEDdriverwitha55V buck controller. The LED driver lights up to 75mA/36V 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. A ±3% LED current matching and a 0.5µs minimum LED on-time can be achieved at 50mA per channel.

FEATUREs
■ 6V to 55V Power Input Voltage Range
■ 16 Independent LED Outputs Up to 75mA/36V
■ ±3% LED Current Matching at 50mA (Typ ±1%)
■ 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
■ 40-Lead 6mm × 6mm QFN Package

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