Smart Lighting
16-Channel 50mA Buck LED Driver with Dot Correction & Gray Scale Dimming
Linear Technology announces the LT3745, a 16-channel LED driver integrated with a 55V step-down controller. The LED driver powers up to 75mA of LED current for each channel, which can drive up to 36V of LEDs in series, making it ideal for applications such as large LED billboards. Each channel has…
Published by LED professional ·
The LT3745’s internal buck controller generates an adaptive bus voltage slightly higher than the parallel LED strings to deliver efficiencies over 90%. Sixteen individual linear current sinks regulate and modulate individual LED strings, offering a wide range of functionality in a compact solution footprint. The LT3745 performs full diagnostics and protection against open/short LED and overtemperature faults, with the fault status sent via the serial data interface. The 30MHz fully buffered, skew-balanced, cascadable serial interface makes the LT3745 ideal for large screen LCD dynamic backlighting as well as full color LED displays.
Summary of 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 & Protection: Individual Open/Short LED & Overtemperature Fault
• 40-Lead 6mm × 6mm QFN Package
• 16-Channel 50mA Buck LED Driver
The LT3745EUJ is available in a 40-lead 6mm x 6mm QFN package, priced starting at $4.95 each, in 1,000-piece quantities. The extended temperature version the LT3745IUJ, or I-grade, is also available, priced starting at $5.45 each in 1,000-piece quantities. All versions are available from stock.
For more information visit, www.linear.com/product/LT3745
About Linear Technology:
Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing and marketing a broad line of high performance analog integrated circuits for major companies worldwide for three decades. The Company’s products provide an essential bridge between our analog world and the digital electronics in communications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. Linear Technology produces power management, data conversion, signal conditioning, RF and interface ICs, and μModule® subsystems.
