A8519KETTR-R datasheet(3/35 Pages) ALLEGRO

3 / 35 page

Wide Input Voltage Range, High-Efficiency,

Fault-Tolerant LED Driver

A8519 and

A8519-1

Allegro MicroSystems, LLC

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Table of Contents

Specifications

Selection Guide

Absolute Maximum Ratings

Thermal Characteristics

Functional Block Diagram

Pinout Diagrams and Terminal List

Characteristic Performance

Functional Description

Enabling the IC

Powering Up: LED Pin Short-to-GND Check

Powering Up: Boost Output Undervoltage

Soft-Start Function

Frequency Selection

SYNC

LED Current Setting and LED Dimming

PWM Dimming

APWM Pin

Extending LED Dimming Ratio

Analog Dimming

LED Short Detect

Overvoltage Protection

Boost Switch Overcurrent Protection

Input Overcurrent Protection and Disconnect Switch

Setting the Current Sense Resistor

Input UVLO

VDD

Shutdown

Dithering Feature

Fault Protection During Operation

Application Information

Design Example

Package Outline Drawings

THERMAL CHARACTERISTICS: May require derating at maximum conditions; see application information.

Characteristic

Symbol

Test Conditions [1]

Value

Unit

Package Thermal Resistance

RθJA

LP Package on 2-layer 3 in2 PCB

°C/W

ET Package on 2-layer 3 in2 PCB

Contact factory

°C/W

LP Package on 4-layer PCB Based on JEDEC Standards

°C/W

ET Package on 4-layer PCB Based on JEDEC Standards

°C/W

Additional thermal information available on the Allegro website.

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