Datasheet Linear Technology LT3745

LT3745
16-Channel 50mA LED
Driver with Buck Controller
Features Description 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
n 40-Lead 6mm × 6mm QFN Package The LT®3745 integrates a 16-channel LED driver with a 55V
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. n n n n n n n n n Applications Large Screen Display LED Backlighting Mono-, Multi-, Full-Color LED Displays
n LED Billboards and Signboards L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are the …