Linear Technology launches 16-channel driver for applications such as large LED billboards
Linear Technology
LT3745 LED driver
The LT3745 16-channel LED driver from Linear Technology is suitable for applications such as large LED billboards, large-screen LCD dynamic backlighting, full-colour LED displays and multi-channel LED systems.
The driver provides wide, dynamic contrast ratios and allows dot correction and greyscale dimming to be accessed using a serial interface in TTL/CMOS logic.
Its internal buck controller generates an adaptive bus voltage that is slightly higher than the parallel LED strings and — according to the company — delivers efficiencies of more then 90 per cent.
The LT3745 can also carry out full diagnostics and protection against over-temperature and open/short LED faults.
The LT3745EUJ model is offered at prices starting from $4.95 (£3.13) each in 1,000-piece quantities. An extended-temperature version — the LT3745IUJ, or I-grade — is available with prices starting from $5.45 each in 1,000-piece quantities.
Click here to download the data sheet.
Key specifications
- Offers a power input voltage range of 6–55V
- Features a 55V step-down controller
- Powers up to 75mA of LED current per channel
- Drives up to 36V of LEDs in series
- Provides ±3 per cent LED current matching at 50mA (typically ±1 per cent)
- Provides 6-bit dot correction current adjustment per channel
- Delivers 12-bit greyscale PWM dimming per channel
- Incorporates a cascadable 30MHz serial data interface
- Comes in a 40-lead 6 x 6mm QFN package
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