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LT3791 Datasheet

LT3791 Datasheet

60V 4-Switch Synchronous Buck-Boost LED Driver Controller
Part No.: LT3791
Page: 28 Pages
Size: 300 KB
Manufacturer: Linear Technology
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Views: 2
Update Time: 2023-12-07 11:37:17
DataSheet: Download

LT3791 Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LT3791EFE#PBF Tube 50 LT3791FE 1 38 -40°C ~ 125°C 38-Lead Plastic TSSOP  
LT3791EFE#TRPBF Reel 2000 LT3791FE 1 38 -40°C ~ 125°C 38-Lead Plastic TSSOP  
LT3791EFE#TRMPBF Reel 500 LT3791FE 1 38 -40°C ~ 125°C 38-Lead Plastic TSSOP  
LT3791IFE#PBF Tube 50 LT3791FE 1 38 -40°C ~ 125°C 38-Lead Plastic TSSOP  
LT3791IFE#TRPBF Reel 2000 LT3791FE 1 38 -40°C ~ 125°C 38-Lead Plastic TSSOP  
LT3791IFE#TRMPBF Reel 500 LT3791FE 1 38 -40°C ~ 125°C 38-Lead Plastic TSSOP  
LT3791HFE#PBF Tube 50 LT3791FE 1 38 -40°C ~ 150°C 38-Lead Plastic TSSOP  
LT3791HFE#TRPBF Reel 2000 LT3791FE 1 38 -40°C ~ 150°C 38-Lead Plastic TSSOP  
LT3791HFE#TRMPBF Reel 500 LT3791FE 1 38 -40°C ~ 150°C 38-Lead Plastic TSSOP  
LT3791MPFE#PBF Tube 50 LT3791FE 1 38 -55°C ~ 150°C 38-Lead Plastic TSSOP  
LT3791MPFE#TRPBF Reel 2000 LT3791FE 1 38 -55°C ~ 150°C 38-Lead Plastic TSSOP  
LT3791MPFE#TRMPBF Reel 500 LT3791FE 1 38 -55°C ~ 150°C 38-Lead Plastic TSSOP  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LT3791 Datasheet(PDF)

LT3791 Datasheet(Picture)

LT3791 Features

  • 4-Switch Single Inductor Architecture Allows VIN Above, Below or Equal to VOUT
  • Synchronous Switching: Up to 98.5% Efficiency
  • Wide VIN Range: 4.7V to 60V
  • Wide VOUT Range: 0V to 60V (52V LED)
  • ±6% LED Current Accuracy: 0V ≤ VLED < 52V
  • True Color PWM and Analog Dimming
  • LED and Input Current Regulation with Current Monitor Outputs
  • No Top MOSFET Refresh in Buck or Boost
  • VOUT Disconnected From VIN During Shutdown
  • Open or Shorted LED Fault Protection
  • Capable of 100W or Greater per IC
  • 38-Lead TSSOP with Exposed Pad

LT3791 Applications

  • Automotive Head Lamps/Running Lamps
  • General Purpose Lighting

LT3791 Description

The LT3791 is a synchronous 4-switch buck-boost LED driver controller. The controller can regulate LED current up to 52V of LED string with input voltages above, below, or equal to the output voltage. The constant-frequency, forced-continuous current mode architecture allows its frequency to be adjusted or synchronized from 200kHz to 700kHz. No top MOSFET refresh switching cycle is needed in buck or boost operation. With 60V input, 60V output capability and seamless transitions between operating regions, the LT3791 is ideal for LED driver applications in automotive, industrial, and even battery-powered systems.

For new designs we recommend the LT8391: 60V synchronous 4-switch, buck-boost LED controller due to its numerous performance improvements over the LT3791.

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