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LINEAR TECHNOLOGY  LT3478EFE#PBF  Led Driver, 1 Output, Boost, Buck, Buck-Boost, 2.8V-36V in, 2.25MHz switch, TSSOP-16

LINEAR TECHNOLOGY LT3478EFE#PBF
Manufacturer Part No:
LT3478EFE#PBF
Order Code:
2294844
Technical Datasheet:
See all Technical Docs

Image is for illustrative purposes only. Please refer to product description.

Product Overview

The LT3478EFE#PBF is a monolithic step-up DC/DC Converter designed to drive LEDs with a constant current over a wide programmable range. Series connection of the LEDs provides identical LED currents for uniform brightness without the need for ballast resistors and expensive factory calibration. The LT3478 uses an external sense resistor to extend the maximum programmable LED current beyond 1A and also to achieve greater accuracy when programming low LED currents. Operating frequency can be set with an external resistor from 200kHz up to 2.25MHz. Unique circuitry allows a PWM dimming range up to 3000:1 while maintaining constant LED colour. The LT3478 is ideal for high power LED driver applications. One of two CTRL pins can be used to program maximum LED current. The other CTRL pin can be used to program a reduction in maximum LED current vs. temperature to maximize LED usage and improve reliability.
  • Integrated resistors for inductor and LED current sensing
  • Program LED current de-rating vs. temperature
  • Separate inductor supply input
  • Inrush current protection
  • Programmable soft-start
  • Open LED protection
  • Accurate shutdown/UVLO threshold with programmable hysteresis

Product Information

Device Topology:
Boost, Buck, Buck-Boost
No. of Outputs:
1Outputs
Output Current:
-
Output Voltage:
-
Driver Case Style:
TSSOP
Input Voltage Min:
2.8V
No. of Pins:
16Pins
Input Voltage Max:
36V
Switching Frequency:
2.25MHz
Operating Temperature Min:
-40°C
Operating Temperature Max:
125°C
Packaging:
Each
Product Range:
-
Automotive Qualification Standard:
-
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (17-Dec-2015)

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Applications

  • Automotive
  • LED Lighting

Legislation and Environmental

Country of Origin:
United States

Country in which last significant manufacturing process was carried out

RoHS Compliant:
Yes
Tariff No:
85423990
Weight (kg):
.000104

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