Datasheet Linear Technology LT3475IFE-1#PBF

Manufacturer	Linear Technology
Series	LT3475-1
Part Number	LT3475IFE-1#PBF

Dual Step-Down 1.5A LED Driver

Datasheets

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PDF, 249 Kb, Language: en, File uploaded: Oct 4, 2017, Pages: 20
Dual Step-Down 1.5A LED Driver

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Packaging

Package	TSSOP-20
Package Code	FE
Package Index	05-08-1663 (CB)

Parametrics

Architecture	Improved Average Output Current Control
Demo Boards	DC1315A,DC923A
Design Tools	LTspice File
Dimming	3000:1 PWM, 10:1 Analog
Export Control	no
Features	High Side Current Sense, Anti-Phase Switching, True Color PWM Dimming, Resistor Set Frequency
Frequency	2000 kHz
Ishutdown	0.01 µA
Isupply	6 mA
Max Number of LEDs	4
Monolithic	yes
Number of Outputs	2
Operating Temperature Range	-40 to 85 °C
Output Current	1.5 A
Switch Current	2.7 A
Synchronous	no
Topology	Buck, LED Driver
Vin Max	36 V
Vin Min	4 V
Vout Max	25 V

Eco Plan

RoHS

Compliant

Other Options

Design Notes

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High Voltage Buck Converters Drive High Power LEDs &mdash DN392
PDF, 98 Kb, File published: Jun 1, 2006
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High Voltage Buck Converters Drive High Power LEDs
Design Note 392
Keith Szolusha
Introduction
High power LEDs continue to replace traditional bulbs
in new automotive, industrial, backlight display and
architectural detail lighting systems. LEDs excel in a wide
range of performance and cost parameters, including
excellent spectral performance, long life, robustness,
falling manufacturing cost and relatively safe materials.
Linear Technology offers a large and growing family of
high voltage DC/DC converters tailored speciп¬Ѓcally to
drive high-powered LEDs.
The LTВ® 3474 and LT3475, for example, are high voltage,
high current, single-and dual-channel buck LED converters with wide PWM dimming ratios that can drive one
or more LEDs up to 1A and 1.5A for 80 lumens to 120
lumens per LED (or more as higher output LEDs become
available). These dedicated LED drivers have onboard
high voltage NPN power switches and internal sense
resistors to minimize board space, reduce component
count and simplify design.
With their high side sense resistors, the LT3474 and
LT3475 can drive LEDs tied to ground, an important …

Model Line

Series: LT3475-1 (4)

LT3475EFE-1#PBF LT3475EFE-1#TRPBF LT3475IFE-1#PBF LT3475IFE-1#TRPBF

Manufacturer's Classification

Power Management > LED Driver ICs > Step-Down (Buck) LED Drivers

Other Names:

LT3475IFE-1PBF, LT3475IFE-1 PBF, LT3475IFE1#PBF, LT3475IFE 1#PBF

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