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ADI LT3478EFE#TRPBF product image
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ADI LT3478EFE#TRPBFRoHS

Manufacturer
ADI
MPN
LT3478EFE#TRPBF
LCSC Part #
C670657
Packaging
TSSOP-16-EP
Customer #
Key Attributes
4.5A 200kHz~2.25MHz PWM 1 DC-DC 42V 2.8V~36V TSSOP-16-EP LED Drivers RoHS
Datasheetpdf iconADI LT3478EFE#TRPBF
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QtyUnit Price(Reference Only)Total Amount
1+$ 6.6169$ 6.62
200+$ 2.5607$ 512.14
500+$ 2.4711$ 1235.55
1,000+$ 2.4264$ 2426.40
Standard Packaging2500/Full Reel
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Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/LED Drivers
ManufacturerADI
PackagingTSSOP-16-EP
Output Current4.5A
Operating Temperature-40℃~+125℃
Frequency - Switching200kHz~2.25MHz
DimmingPWM
Number of Channels1
TypeDC-DC
FeaturesBuilt-in soft-start;LED open-circuit protection;Over-Temperature Protection (OTP);Over Voltage Protection
Output Voltage42V
TopologyBuck;Boost
Voltage - Input(DC)2.8V~36V
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Introduction

AI Translation

The LT3478/LT3478-1 are 4.5A step-up DC/DC converters 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 LT3478-1 reduces external component count and cost by integrating the LED current sense resistor. 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 color. The LT3478/LT3478-1 are ideal for high power LED driver applications such as automotive TFT LCD backlights, courtesy lighting and heads-up displays. 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. Each part is available in a 16-pin thermally enhanced TSSOP Package.

Features

AI Translation
  • True Color PWM Dimming Delivers Constant LED Color with Up to 3000:1 Range
  • Wide Input Voltage Range: 2.8V to 36V
  • 4.5A, 60mΩ, 42V Internal Switch
  • Drives LEDs in Boost, Buck-Boost or Buck Modes
  • Integrated Resistors for Inductor and LED Current Sensing
  • Program LED Current: 100mA to 1050mA (LT3478-1) (10mV to 105mV)/RSENSE (LT3478)
  • 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
  • 16-Pin Thermally Enhanced TSSOP Package

Applications

AI Translation
  • High Power LED Driver
  • Automotive Lighting