Date: 02/09/2011

16-Channel LED driver with 6-55V i/p voltage range and o/p upto 75mA/36V

Linear Technology has announced the LT3745, a 16-channel LED driver integrated with a 55V step-down controller, powers up to 75mA of LED current for each channel, which can drive up to 36V of LEDs in series, making it suitable for applications such as large LED billboards. Both dot correction and gray scale dimming are accessible via a serial interface in TTL/CMOS logic.

Key features of LT3745 include:

6V to 55V Power Input Voltage Range
±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 & Protection: Individual Open/Short LED & Overtemperature Fault
16-Channel 50mA Buck LED Driver

The LT3745's internal buck controller generates an adaptive bus voltage slightly higher than the parallel LED strings to deliver efficiencies over 90% says Linear Technologies.

Available: Now
Price: $4.95 each, in 1K units
Package: 40-lead 6mm x 6mm QFN package

For more information visit, www.linear.com/product/LT3745.