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LINEAR TECHNOLOGY  LT3478IFE#PBF  LED Driver, Boost (Step Up), 2.8-36V input, 1 Output, 2.25 MHz switch-freq., 41V/4.5 A out, TSSOP-16

LINEAR TECHNOLOGY LT3478IFE#PBF
Manufacturer Part No:
LT3478IFE#PBF
Order Code:
1663560
Technical Datasheet:
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Product Overview

The LT3478IFE#PBF is a 4.5A Monolithic LED Driver designed with true colour PWM Dimming 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. Unique circuitry allows a PWM dimming range up to 3000:1 while maintaining constant LED colour. 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. Additional features include inrush current protection, programmable open LED protection and programmable soft-start.
  • True colour PWM™ dimming delivers constant LED colour with up to 3000:1 range
  • 4.5A, 60mR, 42V Internal switch
  • Drives LEDs in boost, buck-boost or buck modes
  • 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
  • Fixed frequency operation from 200kHz to 2.25MHz
  • Open LED protection (programmable OVP)
  • Accurate shutdown/UVLO threshold with programmable hysteresis

Product Information

Device Topology:
Boost (Step Up)
No. of Outputs:
1Outputs
Output Current:
4.5A
Output Voltage:
41V
Driver Case Style:
TSSOP
No. of Pins:
16Pins
Input Voltage Min:
2.8V
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

  • LED Lighting
  • Automotive

Legislation and Environmental

Country of Origin:
Malaysia

Country in which last significant manufacturing process was carried out

RoHS Compliant:
Yes
Tariff No:
85423990
Weight (kg):
.000131

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