LT3763: 60V High Current Step-Down LED Driver Controller Data Sheet (Rev. C)10/22/2015394K
Features and Benefits
- Accurately Control Input and Output Current
- 3000:1 True Color PWM™ Dimming
- ±1.5% Voltage Regulation Accuracy
- ±6% Current Regulation Accuracy
- 6V to 60V Input Voltage Range
- Wide Output Range Up to 55V
- <2µA Shutdown Current
- Control Pin for Thermal Control of Load Current
- Input and Output Current Monitor and Limit
- Open, Short, and C/10 Fault Detection
- PWM Driver Output for LED Applications
- Thermally Enhanced 28-Lead FE Package
The LT3763 is a fixed frequency, synchronous, step-down DC/DC controller designed to accurately regulate output currents up to 20A. The average current mode controller will maintain inductor current regulation over a wide output voltage range from 0V to 55V. Output current is set by analog voltages on the CTRL pins and an external sense resistor. Voltage regulation and overvoltage protection are set with a voltage divider from the output to the FB pin. The switching frequency is programmable from 200kHz to 1MHz through an external resistor on the RT pin or with the SYNC pin and an external clock signal. Input and output current sensing provides input current limiting and an accurate measurement of these currents. The FBIN pin is provided for applications requiring a peak power tracking function.
Additional features include an accurate external reference voltage for use with the CTRL pins, an accurate UVLO/EN pin that allows for programmable UVLO hysteresis, a PWM driver for LED applications, output voltage fault detection, and thermal shutdown.
- High Power Architectural Lighting
- Automotive Lighting
- Aviation and Marine Strobe Lights
- Solar-Powered Chargers, Laser Diodes
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Demonstration circuit 1831A is a high power constant current, constant voltage synchronous buck controller featuring the LT3763. The input of the demo board is up to 60V. The output is optimized for 10V, 10A as a LED driver. The input voltage range of the LT3763 itself is 6V to 60V.
The demo board input range is 12V to 60V, therefore, the demo board utilizes 80V MOSFETs. If an application has a maximum input voltage of 48V, 60V MOSFETs such as BSC100N06LS3, can be used for better efficiency at lower voltage range.
Documentation & Resources
R548 Reliability Data3/26/201828 K
DC1831A - Demo Manual (Rev. A)11/14/2012696K
DN508 - 60V, Synchronous Step-Down High Current LED Driver10/9/2012602K
60VIN 350W LED Driver7/24/2013611K
Tools & Simulations
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Models for the following parts are available in LTspice:
LT3763 Companion Parts
Recommended Related Parts
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LT3763EFE#PBF||Material Declaration||Reliability Data||28-Lead TSSOP w/ EP|
|LT3763EFE#TRPBF||Material Declaration||Reliability Data||28-Lead TSSOP w/ EP|
|LT3763HFE#PBF||Material Declaration||Reliability Data||28-Lead TSSOP w/ EP|
|LT3763HFE#TRPBF||Material Declaration||Reliability Data||28-Lead TSSOP w/ EP|
|LT3763IFE#PBF||Material Declaration||Reliability Data||28-Lead TSSOP w/ EP|
|LT3763IFE#TRPBF||Material Declaration||Reliability Data||28-Lead TSSOP w/ EP|
|Wafer Fabrication Data||R548 Reliability Data|
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.