LT3746 - 32-Channel 20mA LED Driver with Buck Controller
- 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
AEC-Q100 data available for specific packages
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, cascadable serial data interface makes the chip extremely suitable for large screen LCD dynamic backlighting and mono-, multi-, full-color LED displays.
PackagingFor complete and up to date package information and drawings, please refer to our packaging page
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
|Buy Now • Request Samples|
Demo BoardsLinear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
|DC1406A||LT3746EUHH Demo Board | 32-Channel 20mA LED Driver (x3 for RGB), 9V ≤ VIN ≤ 40V, VLED up to 4.2V @ 20mA||Contact Factory|
|DC590B||Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards||$50.00|
Designed for Automotive and Transportation AppicationsAEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
|Buy Now • Request Samples|
- Large Screen Display LED Backlighting
- Mono-, Multi-, Full-Color LED Displays
- LED Billboards and Signboards
People Who Viewed This Product Also Viewed
- LTM8042/LTM8042-1 - μModule (Power Module) Boost LED Driver and Current Source
- LT8500 - 48-Channel LED PWM Generator with 12-Bit Resolution and 50MHz Cascadable Serial Interface
- LT3761 - 60VIN LED Controller with Internal PWM Generator
- LT3080 - Adjustable 1.1A Single Resistor Low Dropout Regulator
- LT3754 - 16-Channel × 50mA LED Driver
- LT3956 - 80VIN, 80VOUT Constant-Current, Constant-Voltage Converter
- LT3796/LT3796-1 - 100V Constant-Current and Constant-Voltage Controller with Dual Current Sense
- LT3799 - Offline Isolated Flyback LED Controller with Active PFC
- LT3791 - 60V 4-Switch Synchronous Buck-Boost LED Driver Controller
- LT8705 - 80V VIN and VOUT Synchronous 4-Switch Buck- Boost DC/DC Controller
Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download: