Linear Technology LT3478/LT3478-1 LED Driver Datasheet

The LT®3478/LT3478-1 are 4.5A step-up DC/DC converters designed to drive LEDs with True Color PWM™ dimming, delivering constant LED color with up to 3000:1 range

Brand: Linear Technology
Category: Other Electronics
Document type: Datasheet
Language: English
Pages: 24
File format: PDF
File size: 284 KB
Published: 02 May, 2012
Updated: 30 September, 2023
MD5 checksum: BD7880B0367982B9700002ABE01F1BDB
PDF: Linear Technology LT3478/LT3478-1 LED Driver Datasheet PDF

About this manual

The LT3478 and LT3478‑1 are high‑current step‑up DC/DC converters designed to drive LEDs with constant current over a programmable range. They support boost, buck‑boost, or buck modes and include integrated resistors for LED current sensing, inrush protection, soft‑start, and programmable over‑voltage protection.

Typical applications include high‑power LED drivers for automotive lighting, TFT LCD backlights, and other high‑brightness lighting solutions. The device is supplied in a 16‑lead thermally enhanced TSSOP package with an exposed pad for optimal heat dissipation.

What's inside

Features
Description
Typical Application
Absolute Maximum Ratings
Electrical Characteristics
Pin Functions
Package Description
Typical Performance Characteristics
Related Parts

Specifications

Operational Input Voltage (Vs)	2.8 V – 36 V
PWM Dimming Range	up to 3000:1
Frequency Range	200 kHz – 2.25 MHz
Package	16‑lead plastic TSSOP

Frequently asked questions

What is the input voltage range for the LT3478?

The device operates from 2.8 V up to 36 V.

How many pins does the LT3478 package have?

It is supplied in a 16‑pin TSSOP package.

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